NuttX RTOS

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@3 42af7a65-404d-4744-a932-0658087f49c3

1 files changed, 134 insertions, 0 deletions

diff --git a/nuttx/sched/pthread_detach.c b/nuttx/sched/pthread_detach.c
new file mode 100644
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+++ b/nuttx/sched/pthread_detach.c
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+/************************************************************
+ * pthread_detach.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 <pthread.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_detach
+ *
+ * Description:
+ *    A thread object may be "detached" to specify that the return
+ *    value and completion status will not be requested.
+ *
+ * Parameters:
+ *   thread
+ *
+ * Return Value:
+ *   0 if successful.  Otherwise, an error code.
+ *
+ * Assumptions:
+ *
+ ************************************************************/
+
+int pthread_detach(pthread_t thread)
+{
+  join_t *pjoin;
+  int ret;
+
+  dbg("%s: Thread=%d\n", __FUNCTION__, thread.pid);
+
+  /* Find the entry associated with this pthread. */
+
+  (void)pthread_takesemaphore(&g_join_semaphore);
+  pjoin = pthread_findjoininfo(thread.pid);
+  if (!pjoin)
+    {
+      dbg("%s: Could not find thread entry\n", __FUNCTION__);
+      ret = EINVAL;
+    }
+  else
+    {
+      /* Has the thread already terminated? */
+
+      if (pjoin->terminated)
+        {
+          /* YES.. just remove the thread entry. */
+
+          (void)pthread_removejoininfo(thread.pid);
+          sched_free(pjoin);
+          pjoin = NULL;
+        }
+      else
+        {
+          /* NO.. Just mark the thread as detached.  It
+           * will be removed and deallocated when the
+           * thread exits
+           */
+
+          pjoin->detached = TRUE;
+        }
+
+      /* Either case is successful */
+
+      ret = OK;
+    }
+  (void)pthread_givesemaphore(&g_join_semaphore);
+
+  dbg("%s: Returning %d\n", __FUNCTION__, ret);
+  return ret;
+}