99 lines
3.2 KiB
C++
99 lines
3.2 KiB
C++
/*
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* Copyright (C) 2021 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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#define ATRACE_TAG (ATRACE_TAG_GRAPHICS | ATRACE_TAG_HAL)
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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 "Util.h"
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namespace aidl::android::hardware::graphics::composer3::impl {
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ndk::ScopedAStatus Composer::createClient(std::shared_ptr<IComposerClient>* outClient) {
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DEBUG_FUNC();
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std::unique_lock<std::mutex> lock(mClientMutex);
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if (!waitForClientDestroyedLocked(lock)) {
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*outClient = nullptr;
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return TO_BINDER_STATUS(EX_NO_RESOURCES);
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}
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auto client = ndk::SharedRefBase::make<ComposerClient>(mHal.get());
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if (!client || !client->init()) {
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*outClient = nullptr;
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return TO_BINDER_STATUS(EX_NO_RESOURCES);
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}
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auto clientDestroyed = [this]() { onClientDestroyed(); };
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client->setOnClientDestroyed(clientDestroyed);
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mClientAlive = true;
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*outClient = client;
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return ndk::ScopedAStatus::ok();
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}
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binder_status_t Composer::dump(int fd, const char** /*args*/, uint32_t /*numArgs*/) {
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std::string output;
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mHal->dumpDebugInfo(&output);
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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_FUNC();
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mHal->getCapabilities(caps);
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return ndk::ScopedAStatus::ok();
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}
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bool Composer::waitForClientDestroyedLocked(std::unique_lock<std::mutex>& lock) {
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if (mClientAlive) {
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using namespace std::chrono_literals;
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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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LOG(DEBUG) << "waiting for previous client to be destroyed";
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mClientDestroyedCondition.wait_for(lock, 1s,
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[this]() -> bool { return !mClientAlive; });
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if (mClientAlive) {
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LOG(DEBUG) << "previous client was not destroyed";
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}
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}
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return !mClientAlive;
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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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mClientAlive = false;
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mClientDestroyedCondition.notify_all();
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}
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::ndk::SpAIBinder Composer::createBinder() {
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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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