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/*
* Copyright (C) 2016 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.
*/
#ifndef CHRE_PLATFORM_SLPI_CONDITION_VARIABLE_IMPL_H_
#define CHRE_PLATFORM_SLPI_CONDITION_VARIABLE_IMPL_H_
#include "chre/platform/condition_variable.h"
#include "chre/platform/fatal_error.h"
#include "chre/platform/log.h"
namespace chre {
inline ConditionVariable::ConditionVariable() {
qurt_cond_init(&mConditionVariable);
}
inline ConditionVariable::~ConditionVariable() {
qurt_cond_destroy(&mConditionVariable);
}
inline void ConditionVariable::notify_one() {
qurt_cond_signal(&mConditionVariable);
}
inline void ConditionVariable::wait(Mutex &mutex) {
qurt_cond_wait(&mConditionVariable, &mutex.mMutex);
}
// Note: The wait_for function is designed to work for a single thread waiting
// on the condition variable.
inline bool ConditionVariable::wait_for(Mutex &mutex, Nanoseconds timeout) {
if (!mTimerInitialized) {
if (!mTimeoutTimer.init()) {
FATAL_ERROR("Failed to initialize condition variable timer");
} else {
mTimerInitialized = true;
}
}
struct TimeoutCallbackData {
ConditionVariable *cvPtr;
bool timedOut;
};
auto callback = [](void *data) {
auto cbData = static_cast<TimeoutCallbackData *>(data);
cbData->timedOut = true;
cbData->cvPtr->notify_one();
};
TimeoutCallbackData callbackData;
callbackData.cvPtr = this;
callbackData.timedOut = false;
if (!mTimeoutTimer.set(callback, &callbackData, timeout)) {
LOGE("Failed to set condition variable timer");
}
wait(mutex);
if (mTimeoutTimer.isActive()) {
if (!mTimeoutTimer.cancel()) {
LOGD("Failed to cancel condition variable timer");
}
}
return !callbackData.timedOut;
}
} // namespace chre
#endif // CHRE_PLATFORM_SLPI_CONDITION_VARIABLE_IMPL_H_
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