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/*
* Copyright (C) 2021 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.
*/
#define ATRACE_TAG (ATRACE_TAG_GRAPHICS | ATRACE_TAG_HAL)
#include "Composer.h"
#include <android-base/logging.h>
#include <android/binder_ibinder_platform.h>
#include "Util.h"
namespace aidl::android::hardware::graphics::composer3::impl {
Composer::Composer() {
int32_t composerInterfaceVersion = 1;
const auto status = getInterfaceVersion(&composerInterfaceVersion);
if (!status.isOk()) {
ALOGE("Get interface version from Composer constructor failed %s",
status.getDescription().c_str());
}
mHal = IComposerHal::create(composerInterfaceVersion);
CHECK(mHal != nullptr);
}
ndk::ScopedAStatus Composer::createClient(std::shared_ptr<IComposerClient>* outClient) {
DEBUG_FUNC();
std::unique_lock<std::mutex> lock(mClientMutex);
if (!waitForClientDestroyedLocked(lock)) {
*outClient = nullptr;
return TO_BINDER_STATUS(EX_NO_RESOURCES);
}
auto client = ndk::SharedRefBase::make<ComposerClient>(mHal.get());
if (!client || !client->init()) {
*outClient = nullptr;
return TO_BINDER_STATUS(EX_NO_RESOURCES);
}
auto clientDestroyed = [this]() { onClientDestroyed(); };
client->setOnClientDestroyed(clientDestroyed);
mClientAlive = true;
*outClient = client;
return ndk::ScopedAStatus::ok();
}
binder_status_t Composer::dump(int fd, const char** /*args*/, uint32_t /*numArgs*/) {
std::string output;
mHal->dumpDebugInfo(&output);
write(fd, output.c_str(), output.size());
return STATUS_OK;
}
ndk::ScopedAStatus Composer::getCapabilities(std::vector<Capability>* caps) {
DEBUG_FUNC();
mHal->getCapabilities(caps);
return ndk::ScopedAStatus::ok();
}
bool Composer::waitForClientDestroyedLocked(std::unique_lock<std::mutex>& lock) {
if (mClientAlive) {
using namespace std::chrono_literals;
// 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.
LOG(DEBUG) << "waiting for previous client to be destroyed";
mClientDestroyedCondition.wait_for(lock, 1s,
[this]() -> bool { return !mClientAlive; });
if (mClientAlive) {
LOG(DEBUG) << "previous client was not destroyed";
}
}
return !mClientAlive;
}
void Composer::onClientDestroyed() {
std::lock_guard<std::mutex> lock(mClientMutex);
mClientAlive = false;
mClientDestroyedCondition.notify_all();
}
::ndk::SpAIBinder Composer::createBinder() {
auto binder = BnComposer::createBinder();
AIBinder_setInheritRt(binder.get(), true);
return binder;
}
} // namespace aidl::android::hardware::graphics::composer3::impl
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