| /* |
| * Copyright 2019 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. |
| */ |
| |
| #include "VSyncReactor.h" |
| #include "TimeKeeper.h" |
| #include "VSyncDispatch.h" |
| #include "VSyncTracker.h" |
| |
| namespace android::scheduler { |
| |
| Clock::~Clock() = default; |
| |
| VSyncReactor::VSyncReactor(std::unique_ptr<Clock> clock, std::unique_ptr<VSyncDispatch> dispatch, |
| std::unique_ptr<VSyncTracker> tracker, size_t pendingFenceLimit) |
| : mClock(std::move(clock)), |
| mDispatch(std::move(dispatch)), |
| mTracker(std::move(tracker)), |
| mPendingLimit(pendingFenceLimit) {} |
| |
| bool VSyncReactor::addPresentFence(const std::shared_ptr<FenceTime>& fence) { |
| if (!fence) { |
| return false; |
| } |
| |
| nsecs_t const signalTime = fence->getCachedSignalTime(); |
| if (signalTime == Fence::SIGNAL_TIME_INVALID) { |
| return true; |
| } |
| |
| std::lock_guard<std::mutex> lk(mMutex); |
| if (mIgnorePresentFences) { |
| return true; |
| } |
| |
| for (auto it = mUnfiredFences.begin(); it != mUnfiredFences.end();) { |
| auto const time = (*it)->getCachedSignalTime(); |
| if (time == Fence::SIGNAL_TIME_PENDING) { |
| it++; |
| } else if (time == Fence::SIGNAL_TIME_INVALID) { |
| it = mUnfiredFences.erase(it); |
| } else { |
| mTracker->addVsyncTimestamp(time); |
| it = mUnfiredFences.erase(it); |
| } |
| } |
| |
| if (signalTime == Fence::SIGNAL_TIME_PENDING) { |
| if (mPendingLimit == mUnfiredFences.size()) { |
| mUnfiredFences.erase(mUnfiredFences.begin()); |
| } |
| mUnfiredFences.push_back(fence); |
| } else { |
| mTracker->addVsyncTimestamp(signalTime); |
| } |
| |
| return false; // TODO(b/144707443): add policy for turning on HWVsync. |
| } |
| |
| void VSyncReactor::setIgnorePresentFences(bool ignoration) { |
| std::lock_guard<std::mutex> lk(mMutex); |
| mIgnorePresentFences = ignoration; |
| if (mIgnorePresentFences == true) { |
| mUnfiredFences.clear(); |
| } |
| } |
| |
| nsecs_t VSyncReactor::computeNextRefresh(int periodOffset) const { |
| auto const now = mClock->now(); |
| auto const currentPeriod = periodOffset ? mTracker->currentPeriod() : 0; |
| return mTracker->nextAnticipatedVSyncTimeFrom(now + periodOffset * currentPeriod); |
| } |
| |
| nsecs_t VSyncReactor::expectedPresentTime() { |
| return mTracker->nextAnticipatedVSyncTimeFrom(mClock->now()); |
| } |
| |
| void VSyncReactor::setPeriod(nsecs_t period) { |
| mTracker->setPeriod(period); |
| { |
| std::lock_guard<std::mutex> lk(mMutex); |
| mPeriodChangeInProgress = true; |
| } |
| } |
| |
| nsecs_t VSyncReactor::getPeriod() { |
| return mTracker->currentPeriod(); |
| } |
| |
| void VSyncReactor::beginResync() {} |
| |
| void VSyncReactor::endResync() {} |
| |
| bool VSyncReactor::addResyncSample(nsecs_t timestamp, bool* periodFlushed) { |
| assert(periodFlushed); |
| mTracker->addVsyncTimestamp(timestamp); |
| { |
| std::lock_guard<std::mutex> lk(mMutex); |
| *periodFlushed = mPeriodChangeInProgress; |
| mPeriodChangeInProgress = false; |
| } |
| return false; |
| } |
| |
| } // namespace android::scheduler |