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