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98 lines
2.7 KiB
98 lines
2.7 KiB
/*
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* Copyright 2020 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 "CommonPool.h"
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#undef LOG_TAG
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#define LOG_TAG "RenderEngine"
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#define ATRACE_TAG ATRACE_TAG_GRAPHICS
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#include <sys/resource.h>
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#include <utils/Trace.h>
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#include <system/thread_defs.h>
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#include <array>
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namespace android {
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namespace renderengine {
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namespace skia {
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CommonPool::CommonPool() {
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ATRACE_CALL();
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CommonPool* pool = this;
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// Create 2 workers
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for (int i = 0; i < THREAD_COUNT; i++) {
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std::thread worker([pool, i] {
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{
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std::array<char, 20> name{"reTask"};
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snprintf(name.data(), name.size(), "reTask%d", i);
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auto self = pthread_self();
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pthread_setname_np(self, name.data());
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setpriority(PRIO_PROCESS, 0, ANDROID_PRIORITY_FOREGROUND);
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}
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pool->workerLoop();
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});
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worker.detach();
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}
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}
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CommonPool& CommonPool::instance() {
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static CommonPool pool;
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return pool;
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}
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void CommonPool::post(Task&& task) {
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instance().enqueue(std::move(task));
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}
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void CommonPool::enqueue(Task&& task) {
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std::unique_lock lock(mLock);
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while (mWorkQueue.size() > QUEUE_SIZE) {
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lock.unlock();
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ALOGW("Queue is full: %d, waiting before adding more tasks.", QUEUE_SIZE);
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usleep(100);
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lock.lock();
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}
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mWorkQueue.push(std::move(task));
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if (mWaitingThreads == THREAD_COUNT || (mWaitingThreads > 0 && mWorkQueue.size() > 1)) {
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mCondition.notify_one();
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}
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}
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void CommonPool::workerLoop() {
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std::unique_lock lock(mLock);
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while (true) {
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if (mWorkQueue.size() == 0) {
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mWaitingThreads++;
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mCondition.wait(lock);
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mWaitingThreads--;
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}
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// Need to double-check that work is still available now that we have the lock
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// It may have already been grabbed by a different thread
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while (mWorkQueue.size() > 0) {
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auto work = mWorkQueue.front();
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mWorkQueue.pop();
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lock.unlock();
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work();
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lock.lock();
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}
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}
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}
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} // namespace skia
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} // namespace renderengine
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} // namespace android
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