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123 lines
3.1 KiB
C
123 lines
3.1 KiB
C
/*
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* BSD-3-Clause
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*
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* Copyright 2021 Ozan Tezcan
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* All rights reserved.
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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 are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. Neither the name of the copyright holder nor the names of its contributors
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* may be 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 "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
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* OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN 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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#ifndef _XOPEN_SOURCE
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#define _XOPEN_SOURCE 700
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#endif
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#include "sc_mutex.h"
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#include <assert.h>
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#if defined(_WIN32) || defined(_WIN64)
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int sc_mutex_init(struct sc_mutex *mtx)
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{
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InitializeCriticalSection(&mtx->mtx);
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return 0;
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}
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int sc_mutex_term(struct sc_mutex *mtx)
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{
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DeleteCriticalSection(&mtx->mtx);
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return 0;
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}
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void sc_mutex_lock(struct sc_mutex *mtx)
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{
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EnterCriticalSection(&mtx->mtx);
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}
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void sc_mutex_unlock(struct sc_mutex *mtx)
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{
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LeaveCriticalSection(&mtx->mtx);
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}
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#else
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int sc_mutex_init(struct sc_mutex *mtx)
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{
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int rc, rv;
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pthread_mutexattr_t attr;
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pthread_mutex_t mut = PTHREAD_MUTEX_INITIALIZER;
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mtx->mtx = mut;
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// May fail on OOM
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rc = pthread_mutexattr_init(&attr);
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if (rc != 0) {
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return -1;
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}
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// This won't fail as long as we pass correct params.
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rc = pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_NORMAL);
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assert(rc == 0);
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// May fail on OOM
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rc = pthread_mutex_init(&mtx->mtx, &attr);
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// This won't fail as long as we pass correct param.
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rv = pthread_mutexattr_destroy(&attr);
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assert(rv == 0);
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(void) rv;
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return rc != 0 ? -1 : 0;
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}
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int sc_mutex_term(struct sc_mutex *mtx)
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{
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int rc;
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rc = pthread_mutex_destroy(&mtx->mtx);
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return rc != 0 ? -1 : 0;
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}
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void sc_mutex_lock(struct sc_mutex *mtx)
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{
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int rc;
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// This won't fail as long as we pass correct param.
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rc = pthread_mutex_lock(&mtx->mtx);
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assert(rc == 0);
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(void) rc;
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}
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void sc_mutex_unlock(struct sc_mutex *mtx)
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{
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int rc;
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// This won't fail as long as we pass correct param.
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rc = pthread_mutex_unlock(&mtx->mtx);
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assert(rc == 0);
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(void) rc;
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}
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#endif
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