2c2a85f086
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@2337 42af7a65-404d-4744-a932-0658087f49c3
138 lines
4.5 KiB
C
138 lines
4.5 KiB
C
/************************************************************************
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* sched/pthread_removejoininfo.c
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*
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* Copyright (C) 2007, 2009 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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************************************************************************/
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/************************************************************************
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* Included Files
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************************************************************************/
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#include <sys/types.h>
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#include "pthread_internal.h"
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/************************************************************************
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* Definitions
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************************************************************************/
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/************************************************************************
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* Private Type Declarations
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************************************************************************/
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/************************************************************************
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* Global Variables
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************************************************************************/
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/************************************************************************
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* Private Variables
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************************************************************************/
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/************************************************************************
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* Private Functions
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************************************************************************/
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/************************************************************************
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* Public Functions
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************************************************************************/
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/************************************************************************
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* Function: pthread_removejoininfo
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*
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* Description:
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* Remove a join_t from the local data set.
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*
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* Parameters:
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* pid
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*
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* Return Value:
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* None or pointer to the found entry.
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*
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* Assumptions:
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* The caller has provided protection from re-entrancy.
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*
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************************************************************************/
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FAR join_t *pthread_removejoininfo(pid_t pid)
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{
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FAR join_t *prev;
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FAR join_t *join;
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/* Find the entry with the matching pid */
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for (prev = NULL, join = g_pthread_head;
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(join && (pid_t)join->thread != pid);
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prev = join, join = join->next);
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/* Remove it from the data set. */
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/* First check if this is the entry at the head of the list. */
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if (join)
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{
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if (!prev)
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{
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/* Check if this is the only entry in the list */
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if (!join->next)
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{
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g_pthread_head = NULL;
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g_pthread_tail = NULL;
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}
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/* Otherwise, remove it from the head of the list */
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else
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{
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g_pthread_head = join->next;
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}
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}
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/* It is not at the head of the list, check if it is at the tail. */
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else if (!join->next)
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{
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g_pthread_tail = prev;
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prev->next = NULL;
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}
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/* No, remove it from the middle of the list. */
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else
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{
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prev->next = join->next;
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}
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}
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return join;
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}
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