NuttX RTOS

git-svn-id: https://nuttx.svn.sourceforge.net/svnroot/nuttx/trunk@3 7fd9a85b-ad96-42d3-883c-3090e2eb8679

1 files changed, 119 insertions, 0 deletions

diff --git a/nuttx/sched/pthread_getspecific.c b/nuttx/sched/pthread_getspecific.c
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+/************************************************************
+ * pthread_getspecific.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 Gregory Nutt 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 <sched.h>
+#include <errno.h>
+#include <debug.h>
+#include "os_internal.h"
+#include "pthread_internal.h"
+
+/************************************************************
+ * Definitions
+ ************************************************************/
+
+/************************************************************
+ * Private Type Declarations
+ ************************************************************/
+
+/************************************************************
+ * Global Variables
+ ************************************************************/
+
+/************************************************************
+ * Private Variables
+ ************************************************************/
+
+/************************************************************
+ * Private Functions
+ ************************************************************/
+
+/************************************************************
+ * Public Functions
+ ************************************************************/
+
+/************************************************************
+ * Function:  pthread_getspecific
+ *
+ * Description:
+ *   The pthread_getspecific() function returns the value
+ *   currently bound to the specified key on behalf of the
+ *   calling thread.
+ *
+ *   The effect of calling pthread_getspecific() with
+ *   with a key value not obtained from pthread_create() or
+ *   after a key has been deleted with pthread_key_delete()
+ *   is undefined.
+ *
+ * Parameters:
+ *   key = The data key to get or set
+ *
+ * Return Value:
+ *   The function pthread_getspecific() returns the thread-
+ *   specific data associated with the given key.  If no
+ *   thread specific data is associated with the key, then
+ *   the value NULL is returned.
+ *
+ *      EINVAL - The key value is invalid.
+ *
+ * Assumptions:
+ *
+ * POSIX Compatibility:
+ *   - Both calling pthread_setspecific() and pthread_getspecific()
+ *     may be called from a thread-specific data destructor
+ *     function.
+ *
+ ************************************************************/
+
+void *pthread_getspecific(pthread_key_t key)
+{
+  _TCB *rtcb = (_TCB*)g_readytorun.head;
+  void *ret = NULL;
+
+  /* Check if the key is valid. */
+
+  if (key < g_pthread_num_keys)
+    {
+      /* Return the stored value. */
+
+      ret = rtcb->pthread_data[key];
+    }
+
+  return ret;
+}