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/*
* Copyright 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.
*/
#pragma once
#include <condition_variable>
#include <memory>
#include <mutex>
#include <vector>
#include <gui/LayerState.h>
#include <system/window.h>
namespace android {
class CountDownLatch;
struct TransactionState {
TransactionState() = default;
TransactionState(const FrameTimelineInfo& frameTimelineInfo,
const Vector<ComposerState>& composerStates,
const Vector<DisplayState>& displayStates, uint32_t transactionFlags,
const sp<IBinder>& applyToken, const InputWindowCommands& inputWindowCommands,
int64_t desiredPresentTime, bool isAutoTimestamp,
const client_cache_t& uncacheBuffer, int64_t postTime, uint32_t permissions,
bool hasListenerCallbacks, std::vector<ListenerCallbacks> listenerCallbacks,
int originPid, int originUid, uint64_t transactionId)
: frameTimelineInfo(frameTimelineInfo),
states(composerStates),
displays(displayStates),
flags(transactionFlags),
applyToken(applyToken),
inputWindowCommands(inputWindowCommands),
desiredPresentTime(desiredPresentTime),
isAutoTimestamp(isAutoTimestamp),
buffer(uncacheBuffer),
postTime(postTime),
permissions(permissions),
hasListenerCallbacks(hasListenerCallbacks),
listenerCallbacks(listenerCallbacks),
originPid(originPid),
originUid(originUid),
id(transactionId) {}
// Invokes `void(const layer_state_t&)` visitor for matching layers.
template <typename Visitor>
void traverseStatesWithBuffers(Visitor&& visitor) const {
for (const auto& [state] : states) {
if (state.hasBufferChanges() && state.hasValidBuffer() && state.surface) {
visitor(state);
}
}
}
// TODO(b/185535769): Remove FrameHint. Instead, reset the idle timer (of the relevant physical
// display) on the main thread if commit leads to composite. Then, RefreshRateOverlay should be
// able to setFrameRate once, rather than for each transaction.
bool isFrameActive() const {
if (!displays.empty()) return true;
for (const auto& [state] : states) {
if (state.frameRateCompatibility != ANATIVEWINDOW_FRAME_RATE_NO_VOTE) {
return true;
}
}
return false;
}
FrameTimelineInfo frameTimelineInfo;
Vector<ComposerState> states;
Vector<DisplayState> displays;
uint32_t flags;
sp<IBinder> applyToken;
InputWindowCommands inputWindowCommands;
int64_t desiredPresentTime;
bool isAutoTimestamp;
client_cache_t buffer;
int64_t postTime;
uint32_t permissions;
bool hasListenerCallbacks;
std::vector<ListenerCallbacks> listenerCallbacks;
int originPid;
int originUid;
uint64_t id;
std::shared_ptr<CountDownLatch> transactionCommittedSignal;
int64_t queueTime = 0;
bool sentFenceTimeoutWarning = false;
};
class CountDownLatch {
public:
enum {
eSyncTransaction = 1 << 0,
eSyncInputWindows = 1 << 1,
};
explicit CountDownLatch(uint32_t flags) : mFlags(flags) {}
// True if there is no waiting condition after count down.
bool countDown(uint32_t flag) {
std::unique_lock<std::mutex> lock(mMutex);
if (mFlags == 0) {
return true;
}
mFlags &= ~flag;
if (mFlags == 0) {
mCountDownComplete.notify_all();
return true;
}
return false;
}
// Return true if triggered.
bool wait_until(const std::chrono::nanoseconds& timeout) const {
std::unique_lock<std::mutex> lock(mMutex);
const auto untilTime = std::chrono::system_clock::now() + timeout;
while (mFlags != 0) {
// Conditional variables can be woken up sporadically, so we check count
// to verify the wakeup was triggered by |countDown|.
if (std::cv_status::timeout == mCountDownComplete.wait_until(lock, untilTime)) {
return false;
}
}
return true;
}
private:
uint32_t mFlags;
mutable std::condition_variable mCountDownComplete;
mutable std::mutex mMutex;
};
} // namespace android
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