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

1 files changed, 124 insertions, 0 deletions

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;
+    }
+}