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