| /* |
| * Copyright (C) 2022 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 "Composer.h" |
| |
| #include <android-base/logging.h> |
| #include <android/binder_ibinder_platform.h> |
| |
| #include "Common.h" |
| |
| namespace aidl::android::hardware::graphics::composer3::impl { |
| |
| ndk::ScopedAStatus Composer::createClient( |
| std::shared_ptr<IComposerClient>* outClient) { |
| DEBUG_LOG("%s", __FUNCTION__); |
| |
| std::unique_lock<std::mutex> lock(mClientMutex); |
| |
| const bool previousClientDestroyed = waitForClientDestroyedLocked(lock); |
| if (!previousClientDestroyed) { |
| ALOGE("%s: failed as composer client already exists", __FUNCTION__); |
| *outClient = nullptr; |
| return ToBinderStatus(HWC3::Error::NoResources); |
| } |
| |
| auto client = ndk::SharedRefBase::make<ComposerClient>(); |
| if (!client) { |
| ALOGE("%s: failed to init composer client", __FUNCTION__); |
| *outClient = nullptr; |
| return ToBinderStatus(HWC3::Error::NoResources); |
| } |
| |
| auto error = client->init(); |
| if (error != HWC3::Error::None) { |
| *outClient = nullptr; |
| return ToBinderStatus(error); |
| } |
| |
| auto clientDestroyed = [this]() { onClientDestroyed(); }; |
| client->setOnClientDestroyed(clientDestroyed); |
| |
| mClient = client; |
| *outClient = client; |
| |
| return ndk::ScopedAStatus::ok(); |
| } |
| |
| bool Composer::waitForClientDestroyedLocked( |
| std::unique_lock<std::mutex>& lock) { |
| if (!mClient.expired()) { |
| // In surface flinger we delete a composer client on one thread and |
| // then create a new client on another thread. Although surface |
| // flinger ensures the calls are made in that sequence (destroy and |
| // then create), sometimes the calls land in the composer service |
| // inverted (create and then destroy). Wait for a brief period to |
| // see if the existing client is destroyed. |
| constexpr const auto kTimeout = std::chrono::seconds(5); |
| mClientDestroyedCondition.wait_for( |
| lock, kTimeout, [this]() -> bool { return mClient.expired(); }); |
| if (!mClient.expired()) { |
| ALOGW("%s: previous client was not destroyed", __FUNCTION__); |
| } |
| } |
| |
| return mClient.expired(); |
| } |
| |
| void Composer::onClientDestroyed() { |
| std::lock_guard<std::mutex> lock(mClientMutex); |
| |
| mClientDestroyedCondition.notify_all(); |
| } |
| |
| binder_status_t Composer::dump(int fd, const char** /*args*/, |
| uint32_t /*numArgs*/) { |
| DEBUG_LOG("%s", __FUNCTION__); |
| |
| std::string output("TODO"); |
| |
| write(fd, output.c_str(), output.size()); |
| return STATUS_OK; |
| } |
| |
| ndk::ScopedAStatus Composer::getCapabilities(std::vector<Capability>* caps) { |
| DEBUG_LOG("%s", __FUNCTION__); |
| |
| caps->clear(); |
| caps->emplace_back(Capability::PRESENT_FENCE_IS_NOT_RELIABLE); |
| caps->emplace_back(Capability::BOOT_DISPLAY_CONFIG); |
| |
| return ndk::ScopedAStatus::ok(); |
| } |
| |
| ::ndk::SpAIBinder Composer::createBinder() { |
| DEBUG_LOG("%s", __FUNCTION__); |
| |
| auto binder = BnComposer::createBinder(); |
| AIBinder_setInheritRt(binder.get(), true); |
| return binder; |
| } |
| |
| } // namespace aidl::android::hardware::graphics::composer3::impl |