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137 lines
4.5 KiB
137 lines
4.5 KiB
/************************************************************************ |
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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 <gnutt@nuttx.org> |
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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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* Name: 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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