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/*
* Copyright (C) 2009 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "rsSignal.h"
#include <errno.h>
namespace android {
namespace renderscript {
Signal::Signal() {
mSet = true;
}
Signal::~Signal() {
pthread_mutex_destroy(&mMutex);
pthread_cond_destroy(&mCondition);
}
bool Signal::init() {
int status = pthread_mutex_init(&mMutex, nullptr);
if (status) {
ALOGE("Signal::init: mutex init failure: %s", strerror(status));
return false;
}
status = pthread_cond_init(&mCondition, nullptr);
if (status) {
ALOGE("Signal::init: condition init failure: %s", strerror(status));
pthread_mutex_destroy(&mMutex);
return false;
}
return true;
}
void Signal::set() {
int status = pthread_mutex_lock(&mMutex);
if (status) {
ALOGE("Signal::set: error locking for set condition: %s", strerror(status));
return;
}
mSet = true;
status = pthread_cond_signal(&mCondition);
if (status) {
ALOGE("Signal::set: error on set condition: %s", strerror(status));
}
status = pthread_mutex_unlock(&mMutex);
if (status) {
ALOGE("Signal::set: error unlocking for set condition: %s", strerror(status));
}
}
void Signal::wait() {
int status = pthread_mutex_lock(&mMutex);
if (status) {
ALOGE("Signal::wait: error locking for condition: %s", strerror(status));
return;
}
if (!mSet) {
status = pthread_cond_wait(&mCondition, &mMutex);
}
if (!status) {
mSet = false;
} else {
ALOGE("Signal::wait: error waiting for condition: %s", strerror(status));
}
status = pthread_mutex_unlock(&mMutex);
if (status) {
ALOGE("Signal::wait: error unlocking for condition: %s", strerror(status));
}
}
} // namespace renderscript
} // namespace android
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