132 lines
3.6 KiB
C
132 lines
3.6 KiB
C
/**
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* @file BLockReactor.c
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* @author Ambroz Bizjak <ambrop7@gmail.com>
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*
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* @section LICENSE
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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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* 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 the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the author nor the
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* names of its contributors may be used to endorse or promote products
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* derived from this software 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" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <misc/debug.h>
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#include <misc/offset.h>
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#include <base/BLog.h>
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#include "BLockReactor.h"
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#include <generated/blog_channel_BLockReactor.h>
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static void thread_signal_handler (BThreadSignal *thread_signal)
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{
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BLockReactor *o = UPPER_OBJECT(thread_signal, BLockReactor, thread_signal);
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DebugObject_Access(&o->d_obj);
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ASSERT_FORCE(sem_post(&o->sem1) == 0)
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ASSERT_FORCE(sem_wait(&o->sem2) == 0)
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}
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int BLockReactor_Init (BLockReactor *o, BReactor *reactor)
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{
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o->reactor = reactor;
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if (!BThreadSignal_Init(&o->thread_signal, reactor, thread_signal_handler)) {
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BLog(BLOG_ERROR, "BThreadSignal_Init failed");
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goto fail0;
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}
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if (sem_init(&o->sem1, 0, 0) < 0) {
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BLog(BLOG_ERROR, "sem_init failed");
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goto fail1;
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}
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if (sem_init(&o->sem2, 0, 0) < 0) {
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BLog(BLOG_ERROR, "sem_init failed");
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goto fail2;
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}
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#ifndef NDEBUG
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o->locked = 0;
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#endif
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DebugObject_Init(&o->d_obj);
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return 1;
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fail2:
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if (sem_close(&o->sem1) < 0) {
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BLog(BLOG_ERROR, "sem_close failed");
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}
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fail1:
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BThreadSignal_Free(&o->thread_signal);
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fail0:
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return 0;
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}
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void BLockReactor_Free (BLockReactor *o)
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{
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DebugObject_Free(&o->d_obj);
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#ifndef NDEBUG
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ASSERT(!o->locked)
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#endif
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if (sem_destroy(&o->sem2) < 0) {
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BLog(BLOG_ERROR, "sem_close failed");
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}
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if (sem_destroy(&o->sem1) < 0) {
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BLog(BLOG_ERROR, "sem_close failed");
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}
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BThreadSignal_Free(&o->thread_signal);
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}
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int BLockReactor_Thread_Lock (BLockReactor *o)
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{
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DebugObject_Access(&o->d_obj);
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#ifndef NDEBUG
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ASSERT(!o->locked)
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#endif
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if (!BThreadSignal_Thread_Signal(&o->thread_signal)) {
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return 0;
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}
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ASSERT_FORCE(sem_wait(&o->sem1) == 0)
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#ifndef NDEBUG
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o->locked = 1;
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#endif
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return 1;
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}
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void BLockReactor_Thread_Unlock (BLockReactor *o)
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{
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DebugObject_Access(&o->d_obj);
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#ifndef NDEBUG
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ASSERT(o->locked)
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#endif
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#ifndef NDEBUG
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o->locked = 0;
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#endif
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ASSERT_FORCE(sem_post(&o->sem2) == 0)
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}
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