1 /* 2 * Copyright 2022 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef ANDROID_HWC_FENCEDBUFFER_H 18 #define ANDROID_HWC_FENCEDBUFFER_H 19 20 #include <aidlcommonsupport/NativeHandle.h> 21 #include <android-base/unique_fd.h> 22 #include <cutils/native_handle.h> 23 24 namespace aidl::android::hardware::graphics::composer3::impl { 25 26 class FencedBuffer { 27 public: FencedBuffer()28 FencedBuffer() : mBuffer(nullptr) {} 29 set(buffer_handle_t buffer,const ndk::ScopedFileDescriptor & fence)30 void set(buffer_handle_t buffer, const ndk::ScopedFileDescriptor& fence) { 31 mBuffer = buffer; 32 mFence = GetUniqueFd(fence); 33 } 34 getBuffer()35 buffer_handle_t getBuffer() const { return mBuffer; } 36 getFence()37 ::android::base::unique_fd getFence() const { 38 if (mFence.ok()) { 39 return ::android::base::unique_fd(dup(mFence.get())); 40 } else { 41 return ::android::base::unique_fd(); 42 } 43 } 44 45 private: GetUniqueFd(const ndk::ScopedFileDescriptor & in)46 static ::android::base::unique_fd GetUniqueFd( 47 const ndk::ScopedFileDescriptor& in) { 48 auto& sfd = const_cast<ndk::ScopedFileDescriptor&>(in); 49 ::android::base::unique_fd ret(sfd.get()); 50 *sfd.getR() = -1; 51 return ret; 52 } 53 54 buffer_handle_t mBuffer; 55 ::android::base::unique_fd mFence; 56 }; 57 58 } // namespace aidl::android::hardware::graphics::composer3::impl 59 60 #endif 61