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/*
* Copyright (C) 2016 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.
*/
#include "FenceSync.h"
#include "DispatchTables.h"
#include "FrameBuffer.h"
#include "OpenGLESDispatch/EGLDispatch.h"
#include "RenderThreadInfo.h"
#include "android/base/containers/Lookup.h"
FenceSync::FenceSync(bool hasNativeFence,
bool destroyWhenSignaled) :
mDestroyWhenSignaled(destroyWhenSignaled) {
assert(mCount == 1);
if (hasNativeFence) incRef();
// assumes that there is a valid + current OpenGL context
assert(RenderThreadInfo::get());
assert(RenderThreadInfo::get()->currContext.get());
mDisplay = FrameBuffer::getFB()->getDisplay();
mSync = s_egl.eglCreateSyncKHR(mDisplay,
EGL_SYNC_FENCE_KHR,
NULL);
}
EGLint FenceSync::wait(uint64_t timeout) {
incRef();
EGLint wait_res =
s_egl.eglClientWaitSyncKHR(mDisplay, mSync,
EGL_SYNC_FLUSH_COMMANDS_BIT_KHR,
timeout);
decRef();
return wait_res;
}
void FenceSync::signaledNativeFd() {
if (!decRef() && mDestroyWhenSignaled) {
decRef();
}
// NOTE: Do not use anything like this construction:
// decRef();
// if (mDestroyWhenSignaled) ...
// If the object was originally constructed with
// mDestroyWhenSignaled == false,
// the first decRef() will have destroyed this object,
// which would make subsequent access to
// |mDestroyWhenSignaled| corrupt memory immediately.
// Please keep this in mind.
}
void FenceSync::destroy() {
s_egl.eglDestroySyncKHR(mDisplay, mSync);
}
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