Move more files into subdirectories under lib/

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@3445 42af7a65-404d-4744-a932-0658087f49c3

28 files changed, 2728 insertions, 5 deletions

diff --git a/nuttx/lib/Makefile b/nuttx/lib/Makefile
index 76bd1b74b..bfcc2468f 100644
--- a/nuttx/lib/Makefile
+++ b/nuttx/lib/Makefile
@@ -38,6 +38,8 @@ include stdio/Make.defs
 include stdlib/Make.defs
 include unistd/Make.defs
 include string/Make.defs
+include pthread/Make.defs
+include semaphore/Make.defs
 include math/Make.defs
 include net/Make.defs
 include time/Make.defs
@@ -49,8 +51,9 @@ ASRCS =
 AOBJS = $(ASRCS:.S=$(OBJEXT))
 
 CSRCS = $(STDIO_SRCS) $(STDLIB_SRCS) $(UNISTD_SRCS) $(STRING_SRCS) \
-		  $(MATH_SRCS) $(NET_SRCS) $(TIME_SRCS) $(LIBGEN_SRCS) \
-		  $(QUEUE_SRCS) $(MISC_SRCS) $(REGEX_SRCS) $(CRC_SRCS) $(DBG_SRCS) 
+		  $(PTHREAD_SRCS) $(SEM_SRCS) $(MATH_SRCS) $(NET_SRCS) \
+		  $(TIME_SRCS) $(LIBGEN_SRCS) $(QUEUE_SRCS) $(MISC_SRCS) \
+		  $(REGEX_SRCS) $(CRC_SRCS) $(DBG_SRCS) 
 COBJS = $(CSRCS:.c=$(OBJEXT))
 
 SRCS = $(ASRCS) $(CSRCS)
@@ -61,13 +64,15 @@ STDIODEPPATH = --dep-path stdio
 STDLIBDEPPATH = --dep-path stdlib
 UNISTDDEPPATH = --dep-path unistd
 STRINGDEPPATH = --dep-path string
+PTHREADDEPPATH = --dep-path pthread
+SEMDEPPATH = --dep-path semaphore
 MATHDEPPATH = --dep-path math
 NETDEPPATH = --dep-path net
 TIMEDEPPATH = --dep-path time
 LIBGENDEPPATH = --dep-path libgen
 QUEUEDEPPATH = --dep-path queue
 MISCDEPPATH = --dep-path misc
-VPATH = stdio:stdlib:unistd:string:math:net:time:libgen:queue:misc
+VPATH = stdio:stdlib:unistd:string:pthread:semaphore:math:net:time:libgen:queue:misc
 
 BIN = liblib$(LIBEXT)
 
@@ -86,8 +91,9 @@ $(BIN):	$(OBJS)
 
 .depend: Makefile $(SRCS)
 	@$(MKDEP) $(ROOTDEPPATH) $(STDIODEPPATH) $(STDLIBDEPPATH) \
-	  $(UNISTDDEPPATH) $(STRINGDEPPATH) $(MATHDEPPATH) $(NETDEPPATH) \
-	  $(TIMEDEPPATH) $(LIBGENDEPPATH) $(QUEUEDEPPATH) $(MISCDEPPATH) \
+	  $(UNISTDDEPPATH) $(STRINGDEPPATH) $(PTHREADDEPPATH) $(SEMDEPPATH) \
+	  $(MATHDEPPATH) $(NETDEPPATH) $(TIMEDEPPATH) $(LIBGENDEPPATH) \
+	  $(QUEUEDEPPATH) $(MISCDEPPATH) \
 	  $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
 	@touch $@
 
diff --git a/nuttx/lib/pthread/Make.defs b/nuttx/lib/pthread/Make.defs
new file mode 100644
index 000000000..47211f9b9
--- /dev/null
+++ b/nuttx/lib/pthread/Make.defs
@@ -0,0 +1,49 @@
+############################################################################
+# lib/pthread/Make.defs
+#
+#   Copyright (C) 2011 Gregory Nutt. All rights reserved.
+#   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+#
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in
+#    the documentation and/or other materials provided with the
+#    distribution.
+# 3. Neither the name NuttX nor the names of its contributors may be
+#    used to endorse or promote products derived from this software
+#    without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+# OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+# POSSIBILITY OF SUCH DAMAGE.
+#
+############################################################################
+
+PTHREAD_SRCS = pthread_attrinit.c pthread_attrdestroy.c \
+		  pthread_attrsetschedpolicy.c pthread_attrgetschedpolicy.c \
+		  pthread_attrsetinheritsched.c pthread_attrgetinheritsched.c \
+		  pthread_attrsetstacksize.c pthread_attrgetstacksize.c \
+		  pthread_attrsetschedparam.c pthread_attrgetschedparam.c \
+		  pthread_barrierattrinit.c pthread_barrierattrdestroy.c \
+		  pthread_barrierattrgetpshared.c pthread_barrierattrsetpshared.c \
+		  pthread_condattrinit.c pthread_condattrdestroy.c \
+		  pthread_mutexattrinit.c pthread_mutexattrdestroy.c \
+		  pthread_mutexattrgetpshared.c pthread_mutexattrsetpshared.c
+
+ifeq ($(CONFIG_MUTEX_TYPES),y)
+PTHREAD_SRCS += pthread_mutexattrsettype.c pthread_mutexattrgettype.c
+endif
diff --git a/nuttx/lib/pthread/pthread_attrdestroy.c b/nuttx/lib/pthread/pthread_attrdestroy.c
new file mode 100644
index 000000000..fdadab743
--- /dev/null
+++ b/nuttx/lib/pthread/pthread_attrdestroy.c
@@ -0,0 +1,108 @@
+/****************************************************************************
+ * lib/pthread/pthread_attrdestroy.c
+ *
+ *   Copyright (C) 2007-2009, 2011 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <pthread.h>
+#include <string.h>
+#include <debug.h>
+#include <errno.h>
+
+/****************************************************************************
+ * Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Type Declarations
+ ****************************************************************************/
+
+/****************************************************************************
+ * Global Variables
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Variables
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Function:  pthread_attr_destroy
+ *
+ * Description:
+ *    An attributes object can be deleted when it is no longer
+ *     needed.
+ *
+ * Parameters:
+ *   attr
+ *
+ * Return Value:
+ *   0 meaning success
+ *
+ * Assumptions:
+ *
+ ****************************************************************************/
+
+int pthread_attr_destroy(FAR pthread_attr_t *attr)
+{
+  int ret;
+
+  sdbg("attr=0x%p\n", attr);
+
+  if (!attr)
+    {
+      ret = EINVAL;
+    }
+  else
+    {
+      memset(attr, 0, sizeof(pthread_attr_t));
+      ret = OK;
+    }
+
+  sdbg("Returning %d\n", ret);
+  return ret;
+}
+
+
diff --git a/nuttx/lib/pthread/pthread_attrgetinheritsched.c b/nuttx/lib/pthread/pthread_attrgetinheritsched.c
new file mode 100644
index 000000000..c1b764faa
--- /dev/null
+++ b/nuttx/lib/pthread/pthread_attrgetinheritsched.c
@@ -0,0 +1,111 @@
+/****************************************************************************
+ * lib/pthread/pthread_attrgetinheritsched.c
+ *
+ *   Copyright (C) 2007-2009, 2011 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <pthread.h>
+#include <string.h>
+#include <debug.h>
+#include <errno.h>
+
+/****************************************************************************
+ * Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Type Declarations
+ ****************************************************************************/
+
+/****************************************************************************
+ * Global Variables
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Variables
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Function:  pthread_attr_getinheritsched
+ *
+ * Description:
+ *   Report whether the scheduling info in the pthread
+ *   attributes will be used or if the thread will
+ *   inherit the properties of the parent.
+ *
+ * Parameters:
+ *   attr
+ *   inheritsched
+ *
+ * Return Value:
+ *   0 if successful.  Otherwise, an error code.
+ *
+ * Assumptions:
+ *
+ ****************************************************************************/
+
+int pthread_attr_getinheritsched(FAR const pthread_attr_t *attr,
+                                 FAR int *inheritsched)
+{
+  int ret;
+
+  sdbg("attr=0x%p inheritsched=0x%p\n", attr, inheritsched);
+
+  if (!attr || !inheritsched)
+    {
+      ret = EINVAL;
+    }
+  else
+    {
+      *inheritsched = (int)attr->inheritsched;
+      ret = OK;
+    }
+
+  sdbg("Returning %d\n", ret);
+  return ret;
+}
+
+
diff --git a/nuttx/lib/pthread/pthread_attrgetschedparam.c b/nuttx/lib/pthread/pthread_attrgetschedparam.c
new file mode 100644
index 000000000..fa456f61a
--- /dev/null
+++ b/nuttx/lib/pthread/pthread_attrgetschedparam.c
@@ -0,0 +1,110 @@
+/****************************************************************************
+ * lib/pthread/pthread_attrgetschedparam.c
+ *
+ *   Copyright (C) 2007-2009, 2011 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <pthread.h>
+#include <string.h>
+#include <sched.h>
+#include <debug.h>
+#include <errno.h>
+
+/****************************************************************************
+ * Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Type Declarations
+ ****************************************************************************/
+
+/****************************************************************************
+ * Global Variables
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Variables
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Function:  pthread_attr_getschedparam
+ *
+ * Description:
+ *
+ * Parameters:
+ *   attr
+ *   param
+ *
+ * Return Value:
+ *   0 if successful.  Otherwise, an error code.
+ *
+ * Assumptions:
+ *
+ ****************************************************************************/
+
+int pthread_attr_getschedparam(FAR pthread_attr_t *attr,
+                               FAR struct sched_param *param)
+{
+  int ret;
+
+  sdbg("attr=0x%p param=0x%p\n", attr, param);
+
+  if (!attr || !param)
+    {
+      ret = EINVAL;
+    }
+  else
+    {
+      param->sched_priority = attr->priority;
+      ret = OK;
+    }
+
+  sdbg("Returning %d\n", ret);
+  return ret;
+}
+
+
+
diff --git a/nuttx/lib/pthread/pthread_attrgetschedpolicy.c b/nuttx/lib/pthread/pthread_attrgetschedpolicy.c
new file mode 100644
index 000000000..b4f762b51
--- /dev/null
+++ b/nuttx/lib/pthread/pthread_attrgetschedpolicy.c
@@ -0,0 +1,105 @@
+/****************************************************************************
+ * lib/pthread/pthread_attrgetschedpolicy.c
+ *
+ *   Copyright (C) 2007, 2008, 2011 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <sys/types.h>
+#include <pthread.h>
+#include <string.h>
+#include <debug.h>
+#include <errno.h>
+
+/****************************************************************************
+ * Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Type Declarations
+ ****************************************************************************/
+
+/****************************************************************************
+ * Global Variables
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Variables
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Function:  pthread_attr_getschedpolicy
+ *
+ * Description:
+ *   Obtain the scheduling algorithm attribute.
+ *
+ * Parameters:
+ *   attr
+ *   policy
+ *
+ * Return Value:
+ *   0 if successful.  Otherwise, an error code.
+ *
+ * Assumptions:
+ *
+ ****************************************************************************/
+
+int pthread_attr_getschedpolicy(FAR pthread_attr_t *attr, int *policy)
+{
+  int ret;
+
+  sdbg("attr=0x%p policy=0x%p\n", attr, policy);
+
+  if (!attr || !policy)
+    {
+      ret = EINVAL;
+    }
+  else
+    {
+      *policy = attr->policy;
+      ret = OK;
+    }
+
+  sdbg("Returning %d\n", ret);
+  return ret;
+}
diff --git a/nuttx/lib/pthread/pthread_attrgetstacksize.c b/nuttx/lib/pthread/pthread_attrgetstacksize.c
new file mode 100644
index 000000000..06e40b5fb
--- /dev/null
+++ b/nuttx/lib/pthread/pthread_attrgetstacksize.c
@@ -0,0 +1,106 @@
+/****************************************************************************
+ * lib/pthread/pthread_attrgetstacksize.c
+ *
+ *   Copyright (C) 2007, 2009, 2011 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <sys/types.h>
+#include <pthread.h>
+#include <string.h>
+#include <debug.h>
+#include <errno.h>
+
+/****************************************************************************
+ * Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Type Declarations
+ ****************************************************************************/
+
+/****************************************************************************
+ * Global Variables
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Variables
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Function:  pthread_attr_getstacksize
+ *
+ * Description:
+ *
+ * Parameters:
+ *   attr
+ *   stacksize
+ *
+ * Return Value:
+ *   0 if successful.  Otherwise, an error code.
+ *
+ * Assumptions:
+ *
+ ****************************************************************************/
+
+int pthread_attr_getstacksize(FAR pthread_attr_t *attr, FAR long *stacksize)
+{
+  int ret;
+
+  sdbg("attr=0x%p stacksize=0x%p\n", attr, stacksize);
+
+  if (!stacksize)
+    {
+      ret = EINVAL;
+    }
+  else
+    {
+      *stacksize = attr->stacksize;
+      ret = OK;
+    }
+
+  sdbg("Returning %d\n", ret);
+  return ret;
+}
+
+
diff --git a/nuttx/lib/pthread/pthread_attrinit.c b/nuttx/lib/pthread/pthread_attrinit.c
new file mode 100644
index 000000000..fc9ee0274
--- /dev/null
+++ b/nuttx/lib/pthread/pthread_attrinit.c
@@ -0,0 +1,113 @@
+/****************************************************************************
+ * lib/pthread/pthread_attrinit.c
+ *
+ *   Copyright (C) 2007-2009, 2011 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <pthread.h>
+#include <string.h>
+#include <debug.h>
+#include <errno.h>
+
+#include <nuttx/pthread.h>
+
+/****************************************************************************
+ * Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Type Declarations
+ ****************************************************************************/
+
+/****************************************************************************
+ * Global Variables
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Variables
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Function:  pthread_attr_init
+ *
+ * Description:
+ *   Initializes a thread attributes object (attr) with
+ *   default values for all of the individual attributes
+ *   used by a given implementation.
+ *
+ * Parameters:
+ *   attr
+ *
+ * Return Value:
+ *   0 on success, otherwise an error number
+ *
+ * Assumptions:
+ *
+ ****************************************************************************/
+
+int pthread_attr_init(FAR pthread_attr_t *attr)
+{
+  int ret = OK;
+
+  sdbg("attr=0x%p\n", attr);
+  if (!attr)
+    {
+      ret = ENOMEM;
+    }
+  else
+    {
+      /* Set the child thread priority to be the default
+       * priority. Set the child stack size to some arbitrary
+       * default value.
+       */
+
+      memcpy(attr, &g_default_pthread_attr, sizeof(pthread_attr_t));
+    }
+
+  sdbg("Returning %d\n", ret);
+  return ret;
+}
+
diff --git a/nuttx/lib/pthread/pthread_attrsetinheritsched.c b/nuttx/lib/pthread/pthread_attrsetinheritsched.c
new file mode 100644
index 000000000..ebdc9b3e4
--- /dev/null
+++ b/nuttx/lib/pthread/pthread_attrsetinheritsched.c
@@ -0,0 +1,113 @@
+/****************************************************************************
+ * lib/pthread/pthread_attrsetinheritsched.c
+ *
+ *   Copyright (C) 2007, 2009, 2011 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <stdint.h>
+#include <pthread.h>
+#include <string.h>
+#include <debug.h>
+#include <errno.h>
+
+/****************************************************************************
+ * Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Type Declarations
+ ****************************************************************************/
+
+/****************************************************************************
+ * Global Variables
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Variables
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Function:  pthread_attr_setinheritsched
+ *
+ * Description:
+ *   Indicate whether the scheduling info in the pthread
+ *   attributes will be used or if the thread will
+ *   inherit the properties of the parent.
+ *
+ * Parameters:
+ *   attr
+ *   policy
+ *
+ * Return Value:
+ *   0 if successful.  Otherwise, an error code.
+ *
+ * Assumptions:
+ *
+ ****************************************************************************/
+
+int pthread_attr_setinheritsched(FAR pthread_attr_t *attr,
+                                 int inheritsched)
+{
+  int ret;
+
+  sdbg("inheritsched=%d\n", inheritsched);
+
+  if (!attr ||
+      (inheritsched != PTHREAD_INHERIT_SCHED &&
+       inheritsched != PTHREAD_EXPLICIT_SCHED))
+    {
+      ret = EINVAL;
+    }
+  else
+    {
+      attr->inheritsched = (uint8_t)inheritsched;
+      ret = OK;
+    }
+
+  sdbg("Returning %d\n", ret);
+  return ret;
+}
+
diff --git a/nuttx/lib/pthread/pthread_attrsetschedparam.c b/nuttx/lib/pthread/pthread_attrsetschedparam.c
new file mode 100644
index 000000000..4f65bcd8c
--- /dev/null
+++ b/nuttx/lib/pthread/pthread_attrsetschedparam.c
@@ -0,0 +1,108 @@
+/****************************************************************************
+ * lib/pthread/pthread_attrsetschedparam.c
+ *
+ *   Copyright (C) 2007-2009, 2011 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <pthread.h>
+#include <string.h>
+#include <sched.h>
+#include <debug.h>
+#include <errno.h>
+
+/****************************************************************************
+ * Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Type Declarations
+ ****************************************************************************/
+
+/****************************************************************************
+ * Global Variables
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Variables
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Function:  pthread_attr_setschedparam
+ *
+ * Description:
+ *
+ * Parameters:
+ *   attr
+ *   param
+ *
+ * Return Value:
+ *   0 if successful.  Otherwise, an error code.
+ *
+ * Assumptions:
+ *
+ ****************************************************************************/
+
+int pthread_attr_setschedparam(FAR pthread_attr_t *attr,
+			       FAR const struct sched_param *param)
+{
+  int ret;
+
+  sdbg("attr=0x%p param=0x%p\n", attr, param);
+
+  if (!attr || !param)
+    {
+      ret = EINVAL;
+    }
+  else
+    {
+      attr->priority = (short)param->sched_priority;
+      ret = OK;
+    }
+  sdbg("Returning %d\n", ret);
+  return ret;
+}
+
+
diff --git a/nuttx/lib/pthread/pthread_attrsetschedpolicy.c b/nuttx/lib/pthread/pthread_attrsetschedpolicy.c
new file mode 100644
index 000000000..b4b1fd054
--- /dev/null
+++ b/nuttx/lib/pthread/pthread_attrsetschedpolicy.c
@@ -0,0 +1,111 @@
+/****************************************************************************
+ * lib/pthread/pthread_attrsetschedpolicy.c
+ *
+ *   Copyright (C) 2007-2009, 2011 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <pthread.h>
+#include <string.h>
+#include <sched.h>
+#include <debug.h>
+#include <errno.h>
+
+/****************************************************************************
+ * Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Type Declarations
+ ****************************************************************************/
+
+/****************************************************************************
+ * Global Variables
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Variables
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Function:  pthread_attr_setschedpolicy
+ *
+ * Description:
+ *   Set the scheduling algorithm attribute.
+ *
+ * Parameters:
+ *   attr
+ *   policy
+ *
+ * Return Value:
+ *   0 if successful.  Otherwise, an error code.
+ *
+ * Assumptions:
+ *
+ ****************************************************************************/
+
+int pthread_attr_setschedpolicy(FAR pthread_attr_t *attr, int policy)
+{
+  int ret;
+
+  sdbg("attr=0x%p policy=%d\n", attr, policy);
+
+#if CONFIG_RR_INTERVAL > 0
+  if (!attr || (policy != SCHED_FIFO && policy != SCHED_RR))
+#else
+  if (!attr || policy != SCHED_FIFO )
+#endif
+    {
+      ret = EINVAL;
+    }
+  else
+    {
+      attr->policy = policy;
+      ret = OK;
+    }
+
+  sdbg("Returning %d\n", ret);
+  return ret;
+}
diff --git a/nuttx/lib/pthread/pthread_attrsetstacksize.c b/nuttx/lib/pthread/pthread_attrsetstacksize.c
new file mode 100644
index 000000000..a2de8ac78
--- /dev/null
+++ b/nuttx/lib/pthread/pthread_attrsetstacksize.c
@@ -0,0 +1,106 @@
+/****************************************************************************
+ * lib/pthread/pthread_attrsetstacksize.c
+ *
+ *   Copyright (C) 2007, 2009, 2011 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <pthread.h>
+#include <string.h>
+#include <debug.h>
+#include <errno.h>
+
+/****************************************************************************
+ * Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Type Declarations
+ ****************************************************************************/
+
+/****************************************************************************
+ * Global Variables
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Variables
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Function:  pthread_attr_setstacksize
+ *
+ * Description:
+ *
+ * Parameters:
+ *   attr
+ *   stacksize
+ *
+ * Return Value:
+ *   0 if successful.  Otherwise, an error code.
+ *
+ * Assumptions:
+ *
+ ****************************************************************************/
+
+int pthread_attr_setstacksize(FAR pthread_attr_t *attr, long stacksize)
+{
+  int ret;
+
+  sdbg("attr=0x%p stacksize=%ld\n", attr, stacksize);
+
+  if (!attr || stacksize < PTHREAD_STACK_MIN)
+    {
+      ret = EINVAL;
+    }
+  else
+    {
+      attr->stacksize = stacksize;
+      ret = OK;
+    }
+
+  sdbg("Returning %d\n", ret);
+  return ret;
+}
+
diff --git a/nuttx/lib/pthread/pthread_barrierattrdestroy.c b/nuttx/lib/pthread/pthread_barrierattrdestroy.c
new file mode 100644
index 000000000..7498bc4f2
--- /dev/null
+++ b/nuttx/lib/pthread/pthread_barrierattrdestroy.c
@@ -0,0 +1,102 @@
+/********************************************************************************
+ * lib/pthread/pthread_barrierattrdestroy.c
+ *
+ *   Copyright (C) 2007, 2009, 2011 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ********************************************************************************/
+
+/********************************************************************************
+ * Included Files
+ ********************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <pthread.h>
+#include <errno.h>
+#include <debug.h>
+
+/********************************************************************************
+ * Definitions
+ ********************************************************************************/
+
+/********************************************************************************
+ * Private Type Declarations
+ ********************************************************************************/
+
+/********************************************************************************
+ * Global Variables
+ ********************************************************************************/
+
+/********************************************************************************
+ * Private Variables
+ ********************************************************************************/
+
+/********************************************************************************
+ * Private Function Prototypes
+ ********************************************************************************/
+
+/********************************************************************************
+ * Public Functions
+ ********************************************************************************/
+
+/********************************************************************************
+ * Function: pthread_barrierattr_destroy
+ *
+ * Description:
+ *   The pthread_barrierattr_destroy() function will destroy a barrier attributes
+ *   object.  A destroyed attr attributes object can be reinitialized using
+ *   pthread_barrierattr_init(); the results of otherwise referencing the object
+ *   after it has been destroyed are undefined.
+ *
+ * Parameters:
+ *   attr - barrier attributes to be destroyed.
+ *
+ * Return Value:
+ *   0 (OK) on success or EINVAL if attr is invalid.
+ *
+ * Assumptions:
+ *
+ ********************************************************************************/
+
+int pthread_barrierattr_destroy(FAR pthread_barrierattr_t *attr)
+{
+  int ret = OK;
+
+  if (!attr)
+    {
+      ret = EINVAL;
+    }
+  else
+    {
+      attr->pshared = PTHREAD_PROCESS_PRIVATE;
+    }
+  return ret;
+}
diff --git a/nuttx/lib/pthread/pthread_barrierattrgetpshared.c b/nuttx/lib/pthread/pthread_barrierattrgetpshared.c
new file mode 100644
index 000000000..f4b4f64c1
--- /dev/null
+++ b/nuttx/lib/pthread/pthread_barrierattrgetpshared.c
@@ -0,0 +1,101 @@
+/********************************************************************************
+ * lib/pthread/pthread_barrierattrgetpshared.c
+ *
+ *   Copyright (C) 2007, 2009, 2011 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ********************************************************************************/
+
+/********************************************************************************
+ * Included Files
+ ********************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <pthread.h>
+#include <errno.h>
+#include <debug.h>
+
+/********************************************************************************
+ * Definitions
+ ********************************************************************************/
+
+/********************************************************************************
+ * Private Type Declarations
+ ********************************************************************************/
+
+/********************************************************************************
+ * Global Variables
+ ********************************************************************************/
+
+/********************************************************************************
+ * Private Variables
+ ********************************************************************************/
+
+/********************************************************************************
+ * Private Function Prototypes
+ ********************************************************************************/
+
+/********************************************************************************
+ * Public Functions
+ ********************************************************************************/
+
+/********************************************************************************
+ * Function: pthread_barrierattr_getpshared
+ *
+ * Description:
+ *   The pthread_barrierattr_getpshared() function will obtain the value of the
+ *   process-shared attribute from the attributes object referenced by attr.
+ *
+ * Parameters:
+ *   attr - barrier attributes to be queried.
+ *   pshared - the location to stored the current value of the pshared attribute.
+ *
+ * Return Value:
+ *   0 (OK) on success or EINVAL if either attr or pshared is invalid.
+ *
+ * Assumptions:
+ *
+ ********************************************************************************/
+
+int pthread_barrierattr_getpshared(FAR const pthread_barrierattr_t *attr, FAR int *pshared)
+{
+  int ret = OK;
+
+  if (!attr || !pshared)
+    {
+      ret = EINVAL;
+    }
+  else
+    {
+      *pshared = attr->pshared;
+    }
+  return ret;
+}
diff --git a/nuttx/lib/pthread/pthread_barrierattrinit.c b/nuttx/lib/pthread/pthread_barrierattrinit.c
new file mode 100644
index 000000000..47bbb8eb4
--- /dev/null
+++ b/nuttx/lib/pthread/pthread_barrierattrinit.c
@@ -0,0 +1,101 @@
+/********************************************************************************
+ * lib/pthread/pthread_barrierattrinit.c
+ *
+ *   Copyright (C) 2007, 2009, 2011 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ********************************************************************************/
+
+/********************************************************************************
+ * Included Files
+ ********************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <pthread.h>
+#include <errno.h>
+#include <debug.h>
+
+/********************************************************************************
+ * Definitions
+ ********************************************************************************/
+
+/********************************************************************************
+ * Private Type Declarations
+ ********************************************************************************/
+
+/********************************************************************************
+ * Global Variables
+ ********************************************************************************/
+
+/********************************************************************************
+ * Private Variables
+ ********************************************************************************/
+
+/********************************************************************************
+ * Private Function Prototypes
+ ********************************************************************************/
+
+/********************************************************************************
+ * Public Functions
+ ********************************************************************************/
+
+/********************************************************************************
+ * Function: pthread_barrierattr_init
+ *
+ * Description:
+ *   The pthread_barrierattr_init() function will initialize a barrier attribute
+ *   object attr with the default value for all of the attributes defined by the
+ *   implementation.
+ *
+ * Parameters:
+ *   attr - barrier attributes to be initialized.
+ *
+ * Return Value:
+ *   0 (OK) on success or EINVAL if attr is invalid.
+ *
+ * Assumptions:
+ *
+ ********************************************************************************/
+
+int pthread_barrierattr_init(FAR pthread_barrierattr_t *attr)
+{
+  int ret = OK;
+
+  if (!attr)
+    {
+      ret = EINVAL;
+    }
+  else
+    {
+      attr->pshared = PTHREAD_PROCESS_PRIVATE;
+    }
+  return ret;
+}
diff --git a/nuttx/lib/pthread/pthread_barrierattrsetpshared.c b/nuttx/lib/pthread/pthread_barrierattrsetpshared.c
new file mode 100644
index 000000000..a982eea39
--- /dev/null
+++ b/nuttx/lib/pthread/pthread_barrierattrsetpshared.c
@@ -0,0 +1,111 @@
+/********************************************************************************
+ * lib/pthread/pthread_barrierattrsetpshared.c
+ *
+ *   Copyright (C) 2007, 2009, 2011 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ********************************************************************************/
+
+/********************************************************************************
+ * Included Files
+ ********************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <pthread.h>
+#include <errno.h>
+#include <debug.h>
+
+/********************************************************************************
+ * Definitions
+ ********************************************************************************/
+
+/********************************************************************************
+ * Private Type Declarations
+ ********************************************************************************/
+
+/********************************************************************************
+ * Global Variables
+ ********************************************************************************/
+
+/********************************************************************************
+ * Private Variables
+ ********************************************************************************/
+
+/********************************************************************************
+ * Private Function Prototypes
+ ********************************************************************************/
+
+/********************************************************************************
+ * Public Functions
+ ********************************************************************************/
+
+/********************************************************************************
+ * Function: pthread_barrierattr_setpshared
+ *
+ * Description:
+ *   The process-shared attribute is set to PTHREAD_PROCESS_SHARED to permit a
+ *   barrier to be operated upon by any thread that has access to the memory where
+ *   the barrier is allocated. If the process-shared attribute is
+ *   PTHREAD_PROCESS_PRIVATE, the barrier can only be operated upon by threads
+ *   created within the same process as the thread that initialized the barrier.
+ *   If threads of different processes attempt to operate on such a barrier, the
+ *   behavior is undefined. The default value of the attribute is
+ *   PTHREAD_PROCESS_PRIVATE.
+ *
+ *   Both constants PTHREAD_PROCESS_SHARED and PTHREAD_PROCESS_PRIVATE are defined
+ *   in pthread.h.
+ *
+ * Parameters:
+ *   attr - barrier attributes to be modified.
+ *   pshared - the new value of the pshared attribute.
+ *
+ * Return Value:
+ *   0 (OK) on success or EINVAL if either attr is invalid or pshared is not one
+ *   of PTHREAD_PROCESS_SHARED or PTHREAD_PROCESS_PRIVATE.
+ *
+ * Assumptions:
+ *
+ ********************************************************************************/
+
+int pthread_barrierattr_setpshared(FAR pthread_barrierattr_t *attr, int pshared)
+{
+  int ret = OK;
+
+  if (!attr || (pshared != PTHREAD_PROCESS_SHARED && pshared != PTHREAD_PROCESS_PRIVATE))
+    {
+      ret = EINVAL;
+    }
+  else
+    {
+      attr->pshared = pshared;
+    }
+  return ret;
+}
diff --git a/nuttx/lib/pthread/pthread_condattrdestroy.c b/nuttx/lib/pthread/pthread_condattrdestroy.c
new file mode 100644
index 000000000..c55dcd4e3
--- /dev/null
+++ b/nuttx/lib/pthread/pthread_condattrdestroy.c
@@ -0,0 +1,82 @@
+/****************************************************************************
+ * lib/pthread/pthread_condattrdestroy.c
+ *
+ *   Copyright (C) 2007-2009, 2011 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <pthread.h>
+#include <debug.h>
+#include <errno.h>
+
+/****************************************************************************
+ * Global Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Function:  pthread_condattr_destroy
+ *
+ * Description:
+ *   Operations on condition variable attributes
+ *
+ * Parameters:
+ *   None
+ *
+ * Return Value:
+ *   None
+ *
+ * Assumptions:
+ *
+ ****************************************************************************/
+
+int pthread_condattr_destroy(FAR pthread_condattr_t *attr)
+{
+  int ret = OK;
+
+  sdbg("attr=0x%p\n", attr);
+
+  if (!attr)
+    {
+      ret = EINVAL;
+    }
+
+  sdbg("Returning %d\n", ret);
+  return ret;
+}
+
+
+
diff --git a/nuttx/lib/pthread/pthread_condattrinit.c b/nuttx/lib/pthread/pthread_condattrinit.c
new file mode 100644
index 000000000..75f01a11b
--- /dev/null
+++ b/nuttx/lib/pthread/pthread_condattrinit.c
@@ -0,0 +1,85 @@
+/****************************************************************************
+ * lib/pthread/pthread_condattrinit.c
+ *
+ *   Copyright (C) 2007-2009, 2011 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <pthread.h>
+#include <debug.h>
+#include <errno.h>
+
+/****************************************************************************
+ * Global Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Function:  pthread_condattr_init
+ *
+ * Description:
+ *   Operations on condition variable attributes
+ *
+ * Parameters:
+ *   None
+ *
+ * Return Value:
+ *   None
+ *
+ * Assumptions:
+ *
+ ****************************************************************************/
+
+int pthread_condattr_init(FAR pthread_condattr_t *attr)
+{
+  int ret = OK;
+
+  sdbg("attr=0x%p\n", attr);
+
+  if (!attr)
+    {
+      ret = EINVAL;
+    }
+  else 
+    {
+      *attr = 0;
+    }
+
+  sdbg("Returning %d\n", ret);
+  return ret;
+}
+
+
diff --git a/nuttx/lib/pthread/pthread_mutexattrdestroy.c b/nuttx/lib/pthread/pthread_mutexattrdestroy.c
new file mode 100644
index 000000000..59e81528b
--- /dev/null
+++ b/nuttx/lib/pthread/pthread_mutexattrdestroy.c
@@ -0,0 +1,104 @@
+/****************************************************************************
+ * lib/pthread/pthread_mutexattrdestroy.c
+ *
+ *   Copyright (C) 2007-2009, 2011 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <pthread.h>
+#include <errno.h>
+#include <debug.h>
+
+/****************************************************************************
+ * Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Type Declarations
+ ****************************************************************************/
+
+/****************************************************************************
+ * Global Variables
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Variables
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Function:  pthread_mutexattr_destroy
+ *
+ * Description:
+ *    Destroy mutex attributes.
+ *
+ * Parameters:
+ *    attr
+ *    pshared
+ *
+ * Return Value:
+ *   0 if successful.  Otherwise, an error code.
+ *
+ * Assumptions:
+ *
+ ****************************************************************************/
+
+int pthread_mutexattr_destroy(FAR pthread_mutexattr_t *attr)
+{
+  int ret = OK;
+
+  sdbg("attr=0x%p\n", attr);
+
+  if (!attr)
+    {
+      ret = EINVAL;
+    }
+  else
+    {
+      attr->pshared = 0;
+    }
+
+  sdbg("Returning %d\n", ret);
+  return ret;
+}
diff --git a/nuttx/lib/pthread/pthread_mutexattrgetpshared.c b/nuttx/lib/pthread/pthread_mutexattrgetpshared.c
new file mode 100644
index 000000000..e5e09bbbe
--- /dev/null
+++ b/nuttx/lib/pthread/pthread_mutexattrgetpshared.c
@@ -0,0 +1,104 @@
+/****************************************************************************
+ * lib/pthread/pthread_mutexattrgetpshared.c
+ *
+ *   Copyright (C) 2007-2009, 2011 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <pthread.h>
+#include <errno.h>
+#include <debug.h>
+
+/****************************************************************************
+ * Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Type Declarations
+ ****************************************************************************/
+
+/****************************************************************************
+ * Global Variables
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Variables
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Function:  pthread_mutexattr_getpshared
+ *
+ * Description:
+ *    Get pshared mutex attribute.
+ *
+ * Parameters:
+ *    attr
+ *    pshared
+ *
+ * Return Value:
+ *   0 if successful.  Otherwise, an error code.
+ *
+ * Assumptions:
+ *
+ ****************************************************************************/
+
+int pthread_mutexattr_getpshared(FAR pthread_mutexattr_t *attr, FAR int *pshared)
+{
+  int ret = OK;
+
+  sdbg("attr=0x%p pshared=0x%p\n", attr, pshared);
+
+  if (!attr || !pshared)
+    {
+      ret = EINVAL;
+    }
+  else
+    {
+      *pshared = attr->pshared;
+    }
+
+  sdbg("Returning %d\n", ret);
+  return ret;
+}
diff --git a/nuttx/lib/pthread/pthread_mutexattrgettype.c b/nuttx/lib/pthread/pthread_mutexattrgettype.c
new file mode 100644
index 000000000..93cbe3601
--- /dev/null
+++ b/nuttx/lib/pthread/pthread_mutexattrgettype.c
@@ -0,0 +1,98 @@
+/****************************************************************************
+ * lib/pthread/pthread_mutexattrgettype.c
+ *
+ *   Copyright (C) 2008, 2011 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+#include <pthread.h>
+#include <errno.h>
+
+#ifdef CONFIG_MUTEX_TYPES
+
+/****************************************************************************
+ * Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Type Declarations
+ ****************************************************************************/
+
+/****************************************************************************
+ * Global Variables
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Variables
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Function Prototypes
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Function: pthread_mutexattr_gettype
+ *
+ * Description:
+ *   Return the mutex type from the mutex attributes.
+ *
+ * Parameters:
+ *   attr - The mutex attributes to query
+ *   type - Location to return the mutex type
+ *
+ * Return Value:
+ *   0, if the mutex type was successfully return in 'type', or
+ *   EINVAL, if any NULL pointers provided.
+ *
+ * Assumptions:
+ *
+ ****************************************************************************/
+
+int pthread_mutexattr_gettype(const pthread_mutexattr_t *attr, int *type)
+{
+  if (attr && type)
+    {
+      *type = attr->type;
+      return 0;
+    }
+  return EINVAL;
+}
+
+#endif /* CONFIG_MUTEX_TYPES */
diff --git a/nuttx/lib/pthread/pthread_mutexattrinit.c b/nuttx/lib/pthread/pthread_mutexattrinit.c
new file mode 100644
index 000000000..729b0b8e1
--- /dev/null
+++ b/nuttx/lib/pthread/pthread_mutexattrinit.c
@@ -0,0 +1,106 @@
+/****************************************************************************
+ * lib/pthread/pthread_mutexattrinit.c
+ *
+ *   Copyright (C) 2007-2009, 2011 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <pthread.h>
+#include <errno.h>
+#include <debug.h>
+
+/****************************************************************************
+ * Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Type Declarations
+ ****************************************************************************/
+
+/****************************************************************************
+ * Global Variables
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Variables
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Function:  pthread_mutexattr_init
+ *
+ * Description:
+ *    Create mutex attributes.
+ *
+ * Parameters:
+ *    attr
+ *
+ * Return Value:
+ *   0 if successful.  Otherwise, an error code.
+ *
+ * Assumptions:
+ *
+ ****************************************************************************/
+
+int pthread_mutexattr_init(FAR pthread_mutexattr_t *attr)
+{
+  int ret = OK;
+
+  sdbg("attr=0x%p\n", attr);
+
+  if (!attr)
+    {
+      ret = EINVAL;
+    }
+  else
+    {
+      attr->pshared = 0;
+#ifdef CONFIG_MUTEX_TYPES
+      attr->type    = PTHREAD_MUTEX_DEFAULT;
+#endif
+    }
+
+  sdbg("Returning %d\n", ret);
+  return ret;
+}
diff --git a/nuttx/lib/pthread/pthread_mutexattrsetpshared.c b/nuttx/lib/pthread/pthread_mutexattrsetpshared.c
new file mode 100644
index 000000000..752e9faa0
--- /dev/null
+++ b/nuttx/lib/pthread/pthread_mutexattrsetpshared.c
@@ -0,0 +1,104 @@
+/****************************************************************************
+ * lib/pthread/pthread_mutexattrsetpshared.c
+ *
+ *   Copyright (C) 2007-2009, 2011 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <pthread.h>
+#include <errno.h>
+#include <debug.h>
+
+/****************************************************************************
+ * Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Type Declarations
+ ****************************************************************************/
+
+/****************************************************************************
+ * Global Variables
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Variables
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Function:  pthread_mutexattr_setpshared
+ *
+ * Description:
+ *    Set pshared  mutex attribute.
+ *
+ * Parameters:
+ *    attr
+ *    pshared
+ *
+ * Return Value:
+ *   0 if successful.  Otherwise, an error code.
+ *
+ * Assumptions:
+ *
+ ****************************************************************************/
+
+int pthread_mutexattr_setpshared(FAR pthread_mutexattr_t *attr, int pshared)
+{
+  int ret = OK;
+
+  sdbg("attr=0x%p pshared=%d\n", attr, pshared);
+
+  if (!attr || (pshared != 0 && pshared != 1))
+    {
+      ret = EINVAL;
+    }
+  else
+    {
+      attr->pshared = pshared;
+    }
+
+  sdbg("Returning %d\n", ret);
+  return ret;
+}
diff --git a/nuttx/lib/pthread/pthread_mutexattrsettype.c b/nuttx/lib/pthread/pthread_mutexattrsettype.c
new file mode 100644
index 000000000..e095dd70c
--- /dev/null
+++ b/nuttx/lib/pthread/pthread_mutexattrsettype.c
@@ -0,0 +1,98 @@
+/****************************************************************************
+ * lib/pthread/pthread_mutexattrsettype.c
+ *
+ *   Copyright (C) 2008, 2011 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+#include <pthread.h>
+#include <errno.h>
+
+#ifdef CONFIG_MUTEX_TYPES
+
+/****************************************************************************
+ * Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Type Declarations
+ ****************************************************************************/
+
+/****************************************************************************
+ * Global Variables
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Variables
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Function Prototypes
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Function: pthread_mutexattr_settype
+ *
+ * Description:
+ *   Set the mutex type in the mutex attributes.
+ *
+ * Parameters:
+ *   attr - The mutex attributes in which to set the mutex type.
+ *   type - The mutex type value to set.
+ *
+ * Return Value:
+ *   0, if the mutex type was successfully set in 'attr', or
+ *   EINVAL, if 'attr' is NULL or 'type' unrecognized.
+ *
+ * Assumptions:
+ *
+ ****************************************************************************/
+
+int pthread_mutexattr_settype(pthread_mutexattr_t *attr, int type)
+{
+  if (attr && type >= PTHREAD_MUTEX_NORMAL && type <= PTHREAD_MUTEX_RECURSIVE)
+    {
+      attr->type = type;
+      return OK;
+    }
+  return EINVAL;
+}
+
+#endif /* CONFIG_MUTEX_TYPES */
diff --git a/nuttx/lib/semaphore/Make.defs b/nuttx/lib/semaphore/Make.defs
new file mode 100644
index 000000000..7ea64b20e
--- /dev/null
+++ b/nuttx/lib/semaphore/Make.defs
@@ -0,0 +1,36 @@
+############################################################################
+# lib/semaphore/Make.defs
+#
+#   Copyright (C) 2011 Gregory Nutt. All rights reserved.
+#   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+#
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in
+#    the documentation and/or other materials provided with the
+#    distribution.
+# 3. Neither the name NuttX nor the names of its contributors may be
+#    used to endorse or promote products derived from this software
+#    without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+# OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+# POSSIBILITY OF SUCH DAMAGE.
+#
+############################################################################
+
+SEM_SRCS = sem_init.c sem_getvalue.c sem_destroy.c
diff --git a/nuttx/lib/semaphore/sem_destroy.c b/nuttx/lib/semaphore/sem_destroy.c
new file mode 100644
index 000000000..0d4fb9271
--- /dev/null
+++ b/nuttx/lib/semaphore/sem_destroy.c
@@ -0,0 +1,124 @@
+/****************************************************************************
+ * lib/semaphore/sem_destroy.c
+ *
+ *   Copyright (C) 2007-2009, 2011 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <semaphore.h>
+#include <errno.h>
+
+/****************************************************************************
+ * Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Type Declarations
+ ****************************************************************************/
+
+/****************************************************************************
+ * Global Variables
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Variables
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Function: sem_destroy
+ *
+ * Description:
+ *   This function is used to destroy the un-named semaphore indicated by
+ *   'sem'.  Only a semaphore that was created using sem_init() may be
+ *   destroyed using sem_destroy(); the effect of calling sem_destroy() with
+ *   a named semaphore is undefined.  The effect of subsequent use of the
+ *   semaphore sem is undefined until sem is re-initialized by another call
+ *   to sem_init().
+ *
+ *   The effect of destroying a semaphore upon which other processes are
+ *   currently blocked is undefined.
+ *
+ * Parameters:
+ *   sem - Semaphore to be destroyed.
+ *
+ * Return Value:
+ *   0 (OK), or -1 (ERROR) if unsuccessful.
+ *
+ * Assumptions:
+ *
+ ****************************************************************************/
+
+int sem_destroy (FAR sem_t *sem)
+{
+  /* Assure a valid semaphore is specified */
+
+  if (sem)
+    {
+      /* There is really no particular action that we need
+       * take to destroy a semaphore.  We will just reset
+       * the count to some reasonable value (1) and release
+       * ownership.
+       *
+       * Check if other threads are waiting on the semaphore.
+       * In this case, the behavior is undefined.  We will:
+       * leave the count unchanged but still return OK.
+       */
+
+      if (sem->semcount >= 0)
+        {
+          sem->semcount = 1;
+        }
+
+      /* Release holders of the semaphore */
+
+      sem_destroyholder(sem);
+      return OK;
+    }
+  else
+    {
+	  errno = -EINVAL;
+	  return ERROR;
+    }
+}
diff --git a/nuttx/lib/semaphore/sem_getvalue.c b/nuttx/lib/semaphore/sem_getvalue.c
new file mode 100644
index 000000000..e1ad9ac0d
--- /dev/null
+++ b/nuttx/lib/semaphore/sem_getvalue.c
@@ -0,0 +1,107 @@
+/****************************************************************************
+ * lib/semaphore/sem_getvalue.c
+ *
+ *   Copyright (C) 2007-2009, 2011 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <semaphore.h>
+#include <errno.h>
+
+/****************************************************************************
+ * Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Type Declarations
+ ****************************************************************************/
+
+/****************************************************************************
+ * Global Variables
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Variables
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Function:  sem_getvalue
+ *
+ * Description:
+ *   This function updates the location referenced by 'sval' argument to
+ *   have the value of the semaphore referenced by 'sem' without effecting
+ *   the state of the semaphore.  The updated value represents the actual
+ *   semaphore value that occurred at some unspecified time during the call,
+ *   but may not reflect the actual value of the semaphore when it is
+ *   returned to the calling task.
+ *
+ *   If 'sem' is locked, the value return by sem_getvalue() will either be
+ *   zero or a negative number whose absolute value represents the number
+ *   of tasks waiting for the semaphore.
+ *
+ * Parameters:
+ *   sem - Semaphore descriptor
+ *   sval - Buffer by which the value is returned
+ *
+ * Return Value:
+ *   0 (OK), or -1 (ERROR) if unsuccessful
+ *
+ * Assumptions:
+ *
+ ****************************************************************************/
+
+int sem_getvalue(FAR sem_t *sem, FAR int *sval)
+{
+  if (sem && sval)
+    {
+      *sval = sem->semcount;
+      return OK;
+    }
+  else
+    {
+	  errno = -EINVAL;
+	  return ERROR;
+    }
+}
diff --git a/nuttx/lib/semaphore/sem_init.c b/nuttx/lib/semaphore/sem_init.c
new file mode 100644
index 000000000..c75281bf0
--- /dev/null
+++ b/nuttx/lib/semaphore/sem_init.c
@@ -0,0 +1,114 @@
+/****************************************************************************
+ * lib/sem/sem_init.c
+ *
+ *   Copyright (C) 2007-2009, 2011 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <limits.h>
+#include <semaphore.h>
+#include <errno.h>
+
+/****************************************************************************
+ * Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Type Declarations
+ ****************************************************************************/
+
+/****************************************************************************
+ * Global Variables
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Variables
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Function: sem_init
+ *
+ * Description:
+ *   This function initializes the UNAMED semaphore sem. Following a
+ *   successful call to sem_init(), the semaophore may be used in subsequent
+ *   calls to sem_wait(), sem_post(), and sem_trywait().  The semaphore
+ *   remains usable until it is destroyed.
+ *
+ *   Only sem itself may be used for performing synchronization. The result
+ *   of referring to copies of sem in calls to sem_wait(), sem_trywait(),
+ *   sem_post(), and sem_destroy() is undefined.
+ *
+ * Parameters:
+ *   sem - Semaphore to be initialized
+ *   pshared - Process sharing (not used)
+ *   value - Semaphore initialization value
+ *
+ * Return Value:
+ *   0 (OK), or -1 (ERROR) if unsuccessful.
+ *
+ * Assumptions:
+ *
+ ****************************************************************************/
+
+int sem_init (FAR sem_t *sem, int pshared, unsigned int value)
+{
+  if (sem && value <= SEM_VALUE_MAX)
+    {
+      sem->semcount     = (int16_t)value;
+#ifdef CONFIG_PRIORITY_INHERITANCE
+#if CONFIG_SEM_PREALLOCHOLDERS > 0
+      sem->hlist.flink  = NULL;
+#endif
+      sem->hlist.holder = NULL;
+      sem->hlist.counts = 0;
+#endif
+      return OK;
+    }
+  else
+    {
+	  errno = -EINVAL;
+	  return ERROR;
+    }
+}