125 lines
3.2 KiB
C++
125 lines
3.2 KiB
C++
/*
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* Copyright (C) 2013 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 <sys/sysinfo.h>
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#include "Task.h"
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#include "TaskProcessor.h"
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#include "TaskManager.h"
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namespace android {
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namespace uirenderer {
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///////////////////////////////////////////////////////////////////////////////
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// Manager
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///////////////////////////////////////////////////////////////////////////////
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TaskManager::TaskManager() {
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// Get the number of available CPUs. This value does not change over time.
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int cpuCount = sysconf(_SC_NPROCESSORS_ONLN);
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for (int i = 0; i < cpuCount / 2; i++) {
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String8 name;
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name.appendFormat("hwuiTask%d", i + 1);
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mThreads.add(new WorkerThread(name));
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}
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}
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TaskManager::~TaskManager() {
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for (size_t i = 0; i < mThreads.size(); i++) {
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mThreads[i]->exit();
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}
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}
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bool TaskManager::canRunTasks() const {
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return mThreads.size() > 0;
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}
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void TaskManager::stop() {
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for (size_t i = 0; i < mThreads.size(); i++) {
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mThreads[i]->exit();
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}
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}
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bool TaskManager::addTaskBase(const sp<TaskBase>& task, const sp<TaskProcessorBase>& processor) {
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if (mThreads.size() > 0) {
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TaskWrapper wrapper(task, processor);
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size_t minQueueSize = INT_MAX;
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sp<WorkerThread> thread;
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for (size_t i = 0; i < mThreads.size(); i++) {
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if (mThreads[i]->getTaskCount() < minQueueSize) {
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thread = mThreads[i];
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minQueueSize = mThreads[i]->getTaskCount();
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}
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}
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return thread->addTask(wrapper);
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}
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return false;
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}
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///////////////////////////////////////////////////////////////////////////////
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// Thread
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///////////////////////////////////////////////////////////////////////////////
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bool TaskManager::WorkerThread::threadLoop() {
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mSignal.wait();
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Vector<TaskWrapper> tasks;
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{
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Mutex::Autolock l(mLock);
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tasks = mTasks;
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mTasks.clear();
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}
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for (size_t i = 0; i < tasks.size(); i++) {
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const TaskWrapper& task = tasks.itemAt(i);
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task.mProcessor->process(task.mTask);
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}
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return true;
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}
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bool TaskManager::WorkerThread::addTask(TaskWrapper task) {
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if (!isRunning()) {
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run(mName.string(), PRIORITY_DEFAULT);
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}
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Mutex::Autolock l(mLock);
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ssize_t index = mTasks.add(task);
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mSignal.signal();
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return index >= 0;
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}
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size_t TaskManager::WorkerThread::getTaskCount() const {
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Mutex::Autolock l(mLock);
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return mTasks.size();
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}
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void TaskManager::WorkerThread::exit() {
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{
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Mutex::Autolock l(mLock);
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mTasks.clear();
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}
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requestExit();
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mSignal.signal();
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}
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}; // namespace uirenderer
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}; // namespace android
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