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Diffstat (limited to 'nuttx/sched/pthread_removejoininfo.c')
-rw-r--r-- | nuttx/sched/pthread_removejoininfo.c | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/nuttx/sched/pthread_removejoininfo.c b/nuttx/sched/pthread_removejoininfo.c new file mode 100644 index 000000000..defc02991 --- /dev/null +++ b/nuttx/sched/pthread_removejoininfo.c @@ -0,0 +1,137 @@ +/************************************************************************ + * 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; +} + |