Resync new repository with old repo r5166

git-svn-id: http://svn.code.sf.net/p/nuttx/code/trunk@5153 42af7a65-404d-4744-a932-0658087f49c3
2026-10-24 06:13:33 +08:00 · 2012-09-17 18:18:44 +00:00
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+/************************************************************************
+ * sched/pthread_removejoininfo.c
+ *
+ *   Copyright (C) 2007, 2009 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * 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_internal.h"
+
+/************************************************************************
+ * Definitions
+ ************************************************************************/
+
+/************************************************************************
+ * Private Type Declarations
+ ************************************************************************/
+
+/************************************************************************
+ * Global Variables
+ ************************************************************************/
+
+/************************************************************************
+ * Private Variables
+ ************************************************************************/
+
+/************************************************************************
+ * Private Functions
+ ************************************************************************/
+
+/************************************************************************
+ * Public Functions
+ ************************************************************************/
+
+/************************************************************************
+ * Name: pthread_removejoininfo
+ *
+ * Description:
+ *   Remove a join_t from the local data set.
+ *
+ * Parameters:
+ *   pid
+ *
+ * Return Value:
+ *   None or pointer to the found entry.
+ *
+ * Assumptions:
+ *   The caller has provided protection from re-entrancy.
+ *
+ ************************************************************************/
+
+FAR join_t *pthread_removejoininfo(pid_t pid)
+{
+  FAR join_t *prev;
+  FAR join_t *join;
+
+  /* Find the entry with the matching pid */
+
+  for (prev = NULL, join = g_pthread_head;
+       (join && (pid_t)join->thread != pid);
+       prev = join, join = join->next);
+
+  /* Remove it from the data set. */
+
+  /* First check if this is the entry at the head of the list. */
+
+  if (join)
+    {
+      if (!prev)
+        {
+          /* Check if this is the only entry in the list */
+
+          if (!join->next)
+            {
+              g_pthread_head = NULL;
+              g_pthread_tail = NULL;
+            }
+
+          /* Otherwise, remove it from the head of the list */
+
+          else
+            {
+              g_pthread_head = join->next;
+            }
+        }
+
+      /* It is not at the head of the list, check if it is at the tail. */
+
+      else if (!join->next)
+        {
+          g_pthread_tail = prev;
+          prev->next = NULL;
+        }
+
+      /* No, remove it from the middle of the list. */
+
+      else
+        {
+          prev->next = join->next;
+        }
+    }
+
+  return join;
+}
+