8e6cdd0375
Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com> Change-Id: I1830a473da179d3a1280d3482b0f000ce72de107
106 lines
3.4 KiB
C
106 lines
3.4 KiB
C
/****************************************************************************
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* libs/libc/pthread/pthread_conddestroy.c
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*
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* Copyright (C) 2007-2009, 2017 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 <nuttx/config.h>
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#include <pthread.h>
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#include <debug.h>
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#include <errno.h>
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: pthread_cond_destroy
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*
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* Description:
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* A thread can delete condition variables.
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*
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* Input Parameters:
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* None
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*
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* Returned Value:
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* OK (0) on success; a (non-negated) errno value on failure. The errno
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* variable is not set. EBUSY is returned when the implementation has
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* detected an attempt to destroy the object referenced by cond while
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* it is referenced. EINVAL is returned when cond is invalid.
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*
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* Assumptions:
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*
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****************************************************************************/
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int pthread_cond_destroy(FAR pthread_cond_t *cond)
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{
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int ret = OK;
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int sval = 0;
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sinfo("cond=0x%p\n", cond);
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if (!cond)
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{
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ret = EINVAL;
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}
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/* Destroy the semaphore contained in the structure */
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else
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{
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ret = sem_getvalue(&cond->sem, &sval);
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if (ret < 0)
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{
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ret = -ret;
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}
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else
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{
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if (sval < 0)
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{
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ret = EBUSY;
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}
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else if (sem_destroy(&cond->sem) != OK)
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{
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ret = get_errno();
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}
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}
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}
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sinfo("Returning %d\n", ret);
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return ret;
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}
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