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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.
*/
#define LOG_TAG "RenderThread"
#include "RenderThread.h"
#include <utils/Log.h>
namespace android {
using namespace uirenderer::renderthread;
ANDROID_SINGLETON_STATIC_INSTANCE(RenderThread);
namespace uirenderer {
namespace renderthread {
RenderThread::RenderThread() : Thread(true), Singleton<RenderThread>()
, mQueueHead(0), mQueueTail(0) {
mLooper = new Looper(false);
run("RenderThread");
}
RenderThread::~RenderThread() {
}
bool RenderThread::threadLoop() {
for (;;) {
int result = mLooper->pollAll(-1);
if (result == Looper::POLL_ERROR) {
// TODO Something?
break;
}
// Process our queue, if we have anything
while (RenderTask* task = nextTask()) {
task->run();
delete task;
}
}
return false;
}
void RenderThread::queue(RenderTask* task) {
AutoMutex _lock(mLock);
if (mQueueTail) {
mQueueTail->mNext = task;
} else {
mQueueHead = task;
}
mQueueTail = task;
if (mQueueHead == task) {
// Only wake if this is the first task
mLooper->wake();
}
}
RenderTask* RenderThread::nextTask() {
AutoMutex _lock(mLock);
RenderTask* ret = mQueueHead;
if (ret) {
if (mQueueTail == mQueueHead) {
mQueueTail = mQueueHead = 0;
} else {
mQueueHead = ret->mNext;
}
ret->mNext = 0;
}
return ret;
}
} /* namespace renderthread */
} /* namespace uirenderer */
} /* namespace android */
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