| /* |
| * 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); |
| } |