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/*
* Copyright 2018 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.
*/
#pragma once
#include <condition_variable>
#include <deque>
#include <mutex>
#include <thread>
#include <unordered_map>
#include <unordered_set>
#include <android-base/thread_annotations.h>
#include <binder/IBinder.h>
#include <gui/ITransactionCompletedListener.h>
#include <ui/Fence.h>
namespace android {
class CallbackHandle : public RefBase {
public:
CallbackHandle(const sp<IBinder>& transactionListener, const std::vector<CallbackId>& ids,
const sp<IBinder>& sc);
sp<IBinder> listener;
std::vector<CallbackId> callbackIds;
wp<IBinder> surfaceControl;
bool releasePreviousBuffer = false;
sp<Fence> previousReleaseFence;
nsecs_t acquireTime = -1;
nsecs_t latchTime = -1;
};
class TransactionCompletedThread {
public:
~TransactionCompletedThread();
void run();
// Adds listener and callbackIds in case there are no SurfaceControls that are supposed
// to be included in the callback. This functions should be call before attempting to register
// any callback handles.
status_t startRegistration(const ListenerCallbacks& listenerCallbacks);
// Ends the registration. After this is called, no more CallbackHandles will be registered.
// It is safe to send a callback if the Transaction doesn't have any Pending callback handles.
status_t endRegistration(const ListenerCallbacks& listenerCallbacks);
// Informs the TransactionCompletedThread that there is a Transaction with a CallbackHandle
// that needs to be latched and presented this frame. This function should be called once the
// layer has received the CallbackHandle so the TransactionCompletedThread knows not to send
// a callback for that Listener/Transaction pair until that CallbackHandle has been latched and
// presented.
status_t registerPendingCallbackHandle(const sp<CallbackHandle>& handle);
// Notifies the TransactionCompletedThread that a pending CallbackHandle has been presented.
status_t finalizePendingCallbackHandles(const std::deque<sp<CallbackHandle>>& handles);
// Adds the Transaction CallbackHandle from a layer that does not need to be relatched and
// presented this frame.
status_t registerUnpresentedCallbackHandle(const sp<CallbackHandle>& handle);
void addPresentFence(const sp<Fence>& presentFence);
void sendCallbacks();
private:
void threadMain();
bool isRegisteringTransaction(const sp<IBinder>& transactionListener,
const std::vector<CallbackId>& callbackIds) REQUIRES(mMutex);
status_t findTransactionStats(const sp<IBinder>& listener,
const std::vector<CallbackId>& callbackIds,
TransactionStats** outTransactionStats) REQUIRES(mMutex);
status_t addCallbackHandle(const sp<CallbackHandle>& handle) REQUIRES(mMutex);
class ThreadDeathRecipient : public IBinder::DeathRecipient {
public:
// This function is a no-op. isBinderAlive needs a linked DeathRecipient to work.
// Death recipients needs a binderDied function.
//
// (isBinderAlive checks if BpBinder's mAlive is 0. mAlive is only set to 0 in sendObituary.
// sendObituary is only called if linkToDeath was called with a DeathRecipient.)
void binderDied(const wp<IBinder>& /*who*/) override {}
};
sp<ThreadDeathRecipient> mDeathRecipient;
// Protects the creation and destruction of mThread
std::mutex mThreadMutex;
std::thread mThread GUARDED_BY(mThreadMutex);
std::mutex mMutex;
std::condition_variable_any mConditionVariable;
std::unordered_set<ListenerCallbacks, ListenerCallbacksHash> mRegisteringTransactions
GUARDED_BY(mMutex);
std::unordered_map<
sp<IBinder>,
std::unordered_map<std::vector<CallbackId>, uint32_t /*count*/, CallbackIdsHash>,
IListenerHash>
mPendingTransactions GUARDED_BY(mMutex);
std::unordered_map<sp<IBinder>, std::deque<TransactionStats>, IListenerHash>
mCompletedTransactions GUARDED_BY(mMutex);
bool mRunning GUARDED_BY(mMutex) = false;
bool mKeepRunning GUARDED_BY(mMutex) = true;
sp<Fence> mPresentFence GUARDED_BY(mMutex);
};
} // namespace android
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