Move more files into subdirectories under lib/

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@3444 42af7a65-404d-4744-a932-0658087f49c3

3 files changed, 438 insertions, 0 deletions

diff --git a/nuttx/lib/misc/lib_filesem.c b/nuttx/lib/misc/lib_filesem.c
new file mode 100644
index 000000000..1f2f80b3c
--- /dev/null
+++ b/nuttx/lib/misc/lib_filesem.c
@@ -0,0 +1,145 @@
+/************************************************************************
+ * lib/misc/lib_filesem.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 <sys/types.h>
+#include <unistd.h>
+#include <semaphore.h>
+#include <errno.h>
+#include <assert.h>
+
+#include "lib_internal.h"
+
+#if CONFIG_STDIO_BUFFER_SIZE > 0
+
+/************************************************************************
+ * Pre-processor Definitions
+ ************************************************************************/
+
+/************************************************************************
+ * Private Data
+ ************************************************************************/
+
+/************************************************************************
+ * Global Functions
+ ************************************************************************/
+
+/************************************************************************
+ * lib_sem_initialize
+ ************************************************************************/
+
+void lib_sem_initialize(FAR struct file_struct *stream)
+{
+  /* Initialize the LIB semaphore to one (to support one-at-
+   * a-time access to private data sets.
+   */
+
+  (void)sem_init(&stream->fs_sem, 0, 1);
+
+  stream->fs_holder = -1;
+  stream->fs_counts = 0;
+}
+
+/************************************************************************
+ * lib_take_semaphore
+ ************************************************************************/
+
+void lib_take_semaphore(FAR struct file_struct *stream)
+{
+  pid_t my_pid = getpid();
+
+  /* Do I already have the semaphore? */
+
+  if (stream->fs_holder == my_pid)
+    {
+      /* Yes, just increment the number of references that I have */
+
+      stream->fs_counts++;
+    }
+  else
+    {
+      /* Take the semaphore (perhaps waiting) */
+
+      while (sem_wait(&stream->fs_sem) != 0)
+	{
+	  /* The only case that an error should occr here is if
+	   * the wait was awakened by a signal.
+	   */
+
+	  ASSERT(*get_errno_ptr() == EINTR);
+	}
+
+      /* We have it.  Claim the stak and return */
+
+      stream->fs_holder = my_pid;
+      stream->fs_counts = 1;
+    }
+}
+
+/************************************************************************
+ * lib_give_semaphore
+ ************************************************************************/
+
+void lib_give_semaphore(FAR struct file_struct *stream)
+{
+  pid_t my_pid = getpid();
+
+  /* I better be holding at least one reference to the semaphore */
+
+  ASSERT(stream->fs_holder == my_pid);
+
+  /* Do I hold multiple references to the semphore */
+
+  if (stream->fs_counts > 1)
+    {
+      /* Yes, just release one count and return */
+
+      stream->fs_counts--;
+    }
+  else
+    {
+      /* Nope, this is the last reference I have */
+
+      stream->fs_holder = -1;
+      stream->fs_counts = 0;
+      ASSERT(sem_post(&stream->fs_sem) == 0);
+    }
+}
+#endif /* CONFIG_STDIO_BUFFER_SIZE */
diff --git a/nuttx/lib/misc/lib_init.c b/nuttx/lib/misc/lib_init.c
new file mode 100644
index 000000000..bd2c6e7ba
--- /dev/null
+++ b/nuttx/lib/misc/lib_init.c
@@ -0,0 +1,203 @@
+/************************************************************
+ * lib_init.c
+ *
+ *   Copyright (C) 2007 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 <stdio.h>
+#include <string.h>
+#include <errno.h>
+#include <nuttx/kmalloc.h>
+#include <nuttx/fs.h>
+#include <nuttx/lib.h>
+#include "lib_internal.h"
+
+/************************************************************
+ * Definitions
+ ************************************************************/
+
+/************************************************************
+ * Private Variables
+ ************************************************************/
+
+/************************************************************
+ * Private Functions
+ ************************************************************/
+
+/************************************************************
+ * Public Functions
+ ************************************************************/
+
+/************************************************************
+ * lib_initialize
+ ************************************************************/
+
+/* General library initialization hook */
+
+void weak_const_function lib_initialize(void)
+{
+}
+
+#if CONFIG_NFILE_STREAMS > 0
+/* The following function is called when a new TCB is allocated.  It
+ * creates the streamlist instance that is stored in the TCB.
+ */
+
+FAR struct streamlist *lib_alloclist(void)
+{
+  FAR struct streamlist *list;
+  list = (FAR struct streamlist*)kzmalloc(sizeof(struct streamlist));
+  if (list)
+    {
+      int i;
+
+      /* Start with a reference count of one */
+
+      list->sl_crefs = 1;
+
+      /* Initialize the list access mutex */
+
+      (void)sem_init(&list->sl_sem, 0, 1);
+
+      /* Initialize each FILE structure */
+
+      for (i = 0; i < CONFIG_NFILE_STREAMS; i++)
+       {
+         /* Clear the IOB */
+
+          memset(&list->sl_streams[i], 0, sizeof(FILE));
+
+          /* Indicate not opened */
+
+          list->sl_streams[i].fs_filedes = -1;
+
+          /* Initialize the stream semaphore to one to support one-at-
+           * a-time access to private data sets.
+           */
+
+          lib_sem_initialize(&list->sl_streams[i]);
+        }
+    }
+  return list;
+
+}
+
+/* This function is called when a TCB is closed (such as with
+ * pthread_create().  It increases the reference count on the stream
+ * list.
+ */
+
+void lib_addreflist(FAR struct streamlist *list)
+{
+  if (list)
+    {
+       /* Increment the reference count on the list.
+        * NOTE: that we disable interrupts to do this
+        * (vs. taking the list semaphore).  We do this
+        * because file cleanup operations often must be
+        * done from the IDLE task which cannot wait
+        * on semaphores.
+        */
+
+       register irqstate_t flags = irqsave();
+       list->sl_crefs++;
+       irqrestore(flags);
+    }
+}
+
+/* this function is called when a TCB is destroyed.  Note that is
+ * does not close the file by release this inode.  This happens
+ * separately when the file descriptor list is freed.
+ */
+
+void lib_releaselist(FAR struct streamlist *list)
+{
+  int crefs;
+  if (list)
+    {
+       /* Decrement the reference count on the list.
+        * NOTE: that we disable interrupts to do this
+        * (vs. taking the list semaphore).  We do this
+        * because file cleanup operations often must be
+        * done from the IDLE task which cannot wait
+        * on semaphores.
+        */
+
+       register irqstate_t flags = irqsave();
+       crefs = --(list->sl_crefs);
+       irqrestore(flags);
+
+       /* If the count decrements to zero, then there is no reference
+        * to the structure and it should be deallocated.  Since there
+        * are references, it would be an error if any task still held
+        * a reference to the list's semaphore.
+        */
+
+       if (crefs <= 0)
+          {
+#if CONFIG_STDIO_BUFFER_SIZE > 0
+            int i;
+#endif
+            /* Destroy the semaphore and release the filelist */
+
+            (void)sem_destroy(&list->sl_sem);
+
+            /* Release each stream in the list */
+
+#if CONFIG_STDIO_BUFFER_SIZE > 0
+            for (i = 0; i < CONFIG_NFILE_STREAMS; i++)
+             {
+               /* Destroy the semaphore that protects the IO buffer */
+
+               (void)sem_destroy(&list->sl_streams[i].fs_sem);
+
+               /* Release the IO buffer */
+               if (list->sl_streams[i].fs_bufstart)
+                 {
+                   sched_free(list->sl_streams[i].fs_bufstart);
+                 }
+             }
+#endif
+           /* Finally, release the list itself */
+
+            sched_free(list);
+         }
+     }
+}
+
+#endif /* CONFIG_NFILE_STREAMS */
+
+
diff --git a/nuttx/lib/misc/lib_streamsem.c b/nuttx/lib/misc/lib_streamsem.c
new file mode 100644
index 000000000..5ab4135bb
--- /dev/null
+++ b/nuttx/lib/misc/lib_streamsem.c
@@ -0,0 +1,90 @@
+/************************************************************************
+ * lib/misc/lib_streamsem.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 <stdlib.h>
+#include <string.h>
+#include <assert.h>
+#include <semaphore.h>
+#include <errno.h>
+#include <nuttx/fs.h>
+
+#include "lib_internal.h"
+
+/************************************************************************
+ * Private types
+ ************************************************************************/
+
+/************************************************************************
+ * Private Variables
+ ************************************************************************/
+
+/************************************************************************
+ * Public Variables
+ ************************************************************************/
+
+/************************************************************************
+ * Private Functions
+ ************************************************************************/
+
+/************************************************************************
+ * Public Functions
+ ************************************************************************/
+
+void stream_semtake(FAR struct streamlist *list)
+{
+  /* Take the semaphore (perhaps waiting) */
+
+  while (sem_wait(&list->sl_sem) != 0)
+    {
+      /* The only case that an error should occr here is if
+       * the wait was awakened by a signal.
+       */
+
+      ASSERT(*get_errno_ptr() == EINTR);
+    }
+}
+
+void stream_semgive(FAR struct streamlist *list)
+{
+  sem_post(&list->sl_sem);
+}
+
+