60 lines
1.7 KiB
C++
60 lines
1.7 KiB
C++
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/*
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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 "EventControlThread.h"
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#include "SurfaceFlinger.h"
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namespace android {
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EventControlThread::EventControlThread(const sp<SurfaceFlinger>& flinger):
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mFlinger(flinger),
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mVsyncEnabled(false) {
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}
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void EventControlThread::setVsyncEnabled(bool enabled) {
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Mutex::Autolock lock(mMutex);
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mVsyncEnabled = enabled;
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mCond.signal();
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}
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bool EventControlThread::threadLoop() {
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Mutex::Autolock lock(mMutex);
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bool vsyncEnabled = mVsyncEnabled;
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mFlinger->eventControl(HWC_DISPLAY_PRIMARY, SurfaceFlinger::EVENT_VSYNC,
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mVsyncEnabled);
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while (true) {
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status_t err = mCond.wait(mMutex);
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if (err != NO_ERROR) {
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ALOGE("error waiting for new events: %s (%d)",
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strerror(-err), err);
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return false;
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}
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if (vsyncEnabled != mVsyncEnabled) {
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mFlinger->eventControl(HWC_DISPLAY_PRIMARY,
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SurfaceFlinger::EVENT_VSYNC, mVsyncEnabled);
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vsyncEnabled = mVsyncEnabled;
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}
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}
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return false;
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}
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} // namespace android
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