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/*
* Copyright (C) 2013 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.
*/
// TODO(b/129481165): remove the #pragma below and fix conversion issues
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wconversion"
#include <pthread.h>
#include <sched.h>
#include <sys/resource.h>
#include <cutils/sched_policy.h>
#include <log/log.h>
#include <system/thread_defs.h>
#include "EventControlThread.h"
namespace android {
EventControlThread::~EventControlThread() = default;
namespace impl {
EventControlThread::EventControlThread(EventControlThread::SetVSyncEnabledFunction function)
: mSetVSyncEnabled(std::move(function)) {
pthread_setname_np(mThread.native_handle(), "EventControlThread");
pid_t tid = pthread_gettid_np(mThread.native_handle());
setpriority(PRIO_PROCESS, tid, ANDROID_PRIORITY_URGENT_DISPLAY);
set_sched_policy(tid, SP_FOREGROUND);
}
EventControlThread::~EventControlThread() {
{
std::lock_guard<std::mutex> lock(mMutex);
mKeepRunning = false;
mCondition.notify_all();
}
mThread.join();
}
void EventControlThread::setVsyncEnabled(bool enabled) {
std::lock_guard<std::mutex> lock(mMutex);
mVsyncEnabled = enabled;
mCondition.notify_all();
}
// Unfortunately std::unique_lock gives warnings with -Wthread-safety
void EventControlThread::threadMain() NO_THREAD_SAFETY_ANALYSIS {
auto keepRunning = true;
auto currentVsyncEnabled = false;
while (keepRunning) {
mSetVSyncEnabled(currentVsyncEnabled);
std::unique_lock<std::mutex> lock(mMutex);
mCondition.wait(lock, [this, currentVsyncEnabled, keepRunning]() NO_THREAD_SAFETY_ANALYSIS {
return currentVsyncEnabled != mVsyncEnabled || keepRunning != mKeepRunning;
});
currentVsyncEnabled = mVsyncEnabled;
keepRunning = mKeepRunning;
}
}
} // namespace impl
} // namespace android
// TODO(b/129481165): remove the #pragma below and fix conversion issues
#pragma clang diagnostic pop // ignored "-Wconversion"
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