libs/hwui/renderthread/DrawFrameTask.cpp - platform/frameworks/base - Git at Google

 /*
  * Copyright (C) 2014 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 "DrawFrameTask.h"

 #include <dlfcn.h>
 #include <gui/TraceUtils.h>
 #include <utils/Log.h>
 #include <algorithm>

 #include "../DeferredLayerUpdater.h"
 #include "../DisplayList.h"
 #include "../Properties.h"
 #include "../RenderNode.h"
 #include "CanvasContext.h"
 #include "RenderThread.h"
 #include "thread/CommonPool.h"

 namespace android {
 namespace uirenderer {
 namespace renderthread {

 namespace {

 typedef APerformanceHintManager* (*APH_getManager)();
 typedef APerformanceHintSession* (*APH_createSession)(APerformanceHintManager*, const int32_t*,
                                                       size_t, int64_t);
 typedef void (*APH_updateTargetWorkDuration)(APerformanceHintSession*, int64_t);
 typedef void (*APH_reportActualWorkDuration)(APerformanceHintSession*, int64_t);
 typedef void (*APH_closeSession)(APerformanceHintSession* session);

 bool gAPerformanceHintBindingInitialized = false;
 APH_getManager gAPH_getManagerFn = nullptr;
 APH_createSession gAPH_createSessionFn = nullptr;
 APH_updateTargetWorkDuration gAPH_updateTargetWorkDurationFn = nullptr;
 APH_reportActualWorkDuration gAPH_reportActualWorkDurationFn = nullptr;
 APH_closeSession gAPH_closeSessionFn = nullptr;

 void ensureAPerformanceHintBindingInitialized() {
     if (gAPerformanceHintBindingInitialized) return;

     void* handle_ = dlopen("libandroid.so", RTLD_NOW | RTLD_NODELETE);
     LOG_ALWAYS_FATAL_IF(handle_ == nullptr, "Failed to dlopen libandroid.so!");

     gAPH_getManagerFn = (APH_getManager)dlsym(handle_, "APerformanceHint_getManager");
     LOG_ALWAYS_FATAL_IF(gAPH_getManagerFn == nullptr,
                         "Failed to find required symbol APerformanceHint_getManager!");

     gAPH_createSessionFn = (APH_createSession)dlsym(handle_, "APerformanceHint_createSession");
     LOG_ALWAYS_FATAL_IF(gAPH_createSessionFn == nullptr,
                         "Failed to find required symbol APerformanceHint_createSession!");

     gAPH_updateTargetWorkDurationFn = (APH_updateTargetWorkDuration)dlsym(
             handle_, "APerformanceHint_updateTargetWorkDuration");
     LOG_ALWAYS_FATAL_IF(
             gAPH_updateTargetWorkDurationFn == nullptr,
             "Failed to find required symbol APerformanceHint_updateTargetWorkDuration!");

     gAPH_reportActualWorkDurationFn = (APH_reportActualWorkDuration)dlsym(
             handle_, "APerformanceHint_reportActualWorkDuration");
     LOG_ALWAYS_FATAL_IF(
             gAPH_reportActualWorkDurationFn == nullptr,
             "Failed to find required symbol APerformanceHint_reportActualWorkDuration!");

     gAPH_closeSessionFn = (APH_closeSession)dlsym(handle_, "APerformanceHint_closeSession");
     LOG_ALWAYS_FATAL_IF(gAPH_closeSessionFn == nullptr,
                         "Failed to find required symbol APerformanceHint_closeSession!");

     gAPerformanceHintBindingInitialized = true;
 }

 }  // namespace

 DrawFrameTask::DrawFrameTask()
         : mRenderThread(nullptr)
         , mContext(nullptr)
         , mContentDrawBounds(0, 0, 0, 0)
         , mSyncResult(SyncResult::OK) {}

 DrawFrameTask::~DrawFrameTask() {}

 void DrawFrameTask::setContext(RenderThread* thread, CanvasContext* context, RenderNode* targetNode,
                                int32_t uiThreadId, int32_t renderThreadId) {
     mRenderThread = thread;
     mContext = context;
     mTargetNode = targetNode;
     mUiThreadId = uiThreadId;
     mRenderThreadId = renderThreadId;
 }

 void DrawFrameTask::pushLayerUpdate(DeferredLayerUpdater* layer) {
     LOG_ALWAYS_FATAL_IF(!mContext,
                         "Lifecycle violation, there's no context to pushLayerUpdate with!");

     for (size_t i = 0; i < mLayers.size(); i++) {
         if (mLayers[i].get() == layer) {
             return;
         }
     }
     mLayers.push_back(layer);
 }

 void DrawFrameTask::removeLayerUpdate(DeferredLayerUpdater* layer) {
     for (size_t i = 0; i < mLayers.size(); i++) {
         if (mLayers[i].get() == layer) {
             mLayers.erase(mLayers.begin() + i);
             return;
         }
     }
 }

 int DrawFrameTask::drawFrame() {
     LOG_ALWAYS_FATAL_IF(!mContext, "Cannot drawFrame with no CanvasContext!");

     mSyncResult = SyncResult::OK;
     mSyncQueued = systemTime(SYSTEM_TIME_MONOTONIC);
     postAndWait();

     return mSyncResult;
 }

 void DrawFrameTask::postAndWait() {
     AutoMutex _lock(mLock);
     mRenderThread->queue().post([this]() { run(); });
     mSignal.wait(mLock);
 }

 void DrawFrameTask::run() {
     const int64_t vsyncId = mFrameInfo[static_cast<int>(FrameInfoIndex::FrameTimelineVsyncId)];
     ATRACE_FORMAT("DrawFrames %" PRId64, vsyncId);
     nsecs_t syncDelayDuration = systemTime(SYSTEM_TIME_MONOTONIC) - mSyncQueued;

     bool canUnblockUiThread;
     bool canDrawThisFrame;
     {
         TreeInfo info(TreeInfo::MODE_FULL, *mContext);
         canUnblockUiThread = syncFrameState(info);
         canDrawThisFrame = info.out.canDrawThisFrame;

         if (mFrameCompleteCallback) {
             mContext->addFrameCompleteListener(std::move(mFrameCompleteCallback));
             mFrameCompleteCallback = nullptr;
         }
     }

     // Grab a copy of everything we need
     CanvasContext* context = mContext;
     std::function<void(int64_t)> callback = std::move(mFrameCallback);
     mFrameCallback = nullptr;
     int64_t intendedVsync = mFrameInfo[static_cast<int>(FrameInfoIndex::IntendedVsync)];
     int64_t frameDeadline = mFrameInfo[static_cast<int>(FrameInfoIndex::FrameDeadline)];
     int64_t frameStartTime = mFrameInfo[static_cast<int>(FrameInfoIndex::FrameStartTime)];

     // From this point on anything in "this" is *UNSAFE TO ACCESS*
     if (canUnblockUiThread) {
         unblockUiThread();
     }

     // Even if we aren't drawing this vsync pulse the next frame number will still be accurate
     if (CC_UNLIKELY(callback)) {
         context->enqueueFrameWork(
                 [callback, frameNr = context->getFrameNumber()]() { callback(frameNr); });
     }

     nsecs_t dequeueBufferDuration = 0;
     if (CC_LIKELY(canDrawThisFrame)) {
         dequeueBufferDuration = context->draw();
     } else {
         // Do a flush in case syncFrameState performed any texture uploads. Since we skipped
         // the draw() call, those uploads (or deletes) will end up sitting in the queue.
         // Do them now
         if (GrDirectContext* grContext = mRenderThread->getGrContext()) {
             grContext->flushAndSubmit();
         }
         // wait on fences so tasks don't overlap next frame
         context->waitOnFences();
     }

     if (!canUnblockUiThread) {
         unblockUiThread();
     }

     if (!mHintSessionWrapper) mHintSessionWrapper.emplace(mUiThreadId, mRenderThreadId);
     constexpr int64_t kSanityCheckLowerBound = 100000;       // 0.1ms
     constexpr int64_t kSanityCheckUpperBound = 10000000000;  // 10s
     int64_t targetWorkDuration = frameDeadline - intendedVsync;
     targetWorkDuration = targetWorkDuration * Properties::targetCpuTimePercentage / 100;
     if (targetWorkDuration > kSanityCheckLowerBound &&
         targetWorkDuration < kSanityCheckUpperBound &&
         targetWorkDuration != mLastTargetWorkDuration) {
         mLastTargetWorkDuration = targetWorkDuration;
         mHintSessionWrapper->updateTargetWorkDuration(targetWorkDuration);
     }
     int64_t frameDuration = systemTime(SYSTEM_TIME_MONOTONIC) - frameStartTime;
     int64_t actualDuration = frameDuration -
                              (std::min(syncDelayDuration, mLastDequeueBufferDuration)) -
                              dequeueBufferDuration;
     if (actualDuration > kSanityCheckLowerBound && actualDuration < kSanityCheckUpperBound) {
         mHintSessionWrapper->reportActualWorkDuration(actualDuration);
     }

     mLastDequeueBufferDuration = dequeueBufferDuration;
 }

 bool DrawFrameTask::syncFrameState(TreeInfo& info) {
     ATRACE_CALL();
     int64_t vsync = mFrameInfo[static_cast<int>(FrameInfoIndex::Vsync)];
     int64_t intendedVsync = mFrameInfo[static_cast<int>(FrameInfoIndex::IntendedVsync)];
     int64_t vsyncId = mFrameInfo[static_cast<int>(FrameInfoIndex::FrameTimelineVsyncId)];
     int64_t frameDeadline = mFrameInfo[static_cast<int>(FrameInfoIndex::FrameDeadline)];
     int64_t frameInterval = mFrameInfo[static_cast<int>(FrameInfoIndex::FrameInterval)];
     mRenderThread->timeLord().vsyncReceived(vsync, intendedVsync, vsyncId, frameDeadline,
             frameInterval);
     bool canDraw = mContext->makeCurrent();
     mContext->unpinImages();

     for (size_t i = 0; i < mLayers.size(); i++) {
         mLayers[i]->apply();
     }
     mLayers.clear();
     mContext->setContentDrawBounds(mContentDrawBounds);
     mContext->prepareTree(info, mFrameInfo, mSyncQueued, mTargetNode);

     // This is after the prepareTree so that any pending operations
     // (RenderNode tree state, prefetched layers, etc...) will be flushed.
     if (CC_UNLIKELY(!mContext->hasSurface() || !canDraw)) {
         if (!mContext->hasSurface()) {
             mSyncResult |= SyncResult::LostSurfaceRewardIfFound;
         } else {
             // If we have a surface but can't draw we must be stopped
             mSyncResult |= SyncResult::ContextIsStopped;
         }
         info.out.canDrawThisFrame = false;
     }

     if (info.out.hasAnimations) {
         if (info.out.requiresUiRedraw) {
             mSyncResult |= SyncResult::UIRedrawRequired;
         }
     }
     if (!info.out.canDrawThisFrame) {
         mSyncResult |= SyncResult::FrameDropped;
     }
     // If prepareTextures is false, we ran out of texture cache space
     return info.prepareTextures;
 }

 void DrawFrameTask::unblockUiThread() {
     AutoMutex _lock(mLock);
     mSignal.signal();
 }

 DrawFrameTask::HintSessionWrapper::HintSessionWrapper(int32_t uiThreadId, int32_t renderThreadId) {
     if (!Properties::useHintManager) return;
     if (uiThreadId < 0 || renderThreadId < 0) return;

     ensureAPerformanceHintBindingInitialized();

     APerformanceHintManager* manager = gAPH_getManagerFn();
     if (!manager) return;

     std::vector<int32_t> tids = CommonPool::getThreadIds();
     tids.push_back(uiThreadId);
     tids.push_back(renderThreadId);

     // DrawFrameTask code will always set a target duration before reporting actual durations.
     // So this is just a placeholder value that's never used.
     int64_t dummyTargetDurationNanos = 16666667;
     mHintSession =
             gAPH_createSessionFn(manager, tids.data(), tids.size(), dummyTargetDurationNanos);
 }

 DrawFrameTask::HintSessionWrapper::~HintSessionWrapper() {
     if (mHintSession) {
         gAPH_closeSessionFn(mHintSession);
     }
 }

 void DrawFrameTask::HintSessionWrapper::updateTargetWorkDuration(long targetDurationNanos) {
     if (mHintSession) {
         gAPH_updateTargetWorkDurationFn(mHintSession, targetDurationNanos);
     }
 }

 void DrawFrameTask::HintSessionWrapper::reportActualWorkDuration(long actualDurationNanos) {
     if (mHintSession) {
         gAPH_reportActualWorkDurationFn(mHintSession, actualDurationNanos);
     }
 }

 } /* namespace renderthread */
 } /* namespace uirenderer */
 } /* namespace android */
	/*
	* Copyright (C) 2014 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 "DrawFrameTask.h"

	#include <dlfcn.h>
	#include <gui/TraceUtils.h>
	#include <utils/Log.h>
	#include <algorithm>

	#include "../DeferredLayerUpdater.h"
	#include "../DisplayList.h"
	#include "../Properties.h"
	#include "../RenderNode.h"
	#include "CanvasContext.h"
	#include "RenderThread.h"
	#include "thread/CommonPool.h"

	namespace android {
	namespace uirenderer {
	namespace renderthread {

	namespace {

	typedef APerformanceHintManager* (*APH_getManager)();
	typedef APerformanceHintSession* (APH_createSession)(APerformanceHintManager, const int32_t*,
	size_t, int64_t);
	typedef void (APH_updateTargetWorkDuration)(APerformanceHintSession, int64_t);
	typedef void (APH_reportActualWorkDuration)(APerformanceHintSession, int64_t);
	typedef void (APH_closeSession)(APerformanceHintSession session);

	bool gAPerformanceHintBindingInitialized = false;
	APH_getManager gAPH_getManagerFn = nullptr;
	APH_createSession gAPH_createSessionFn = nullptr;
	APH_updateTargetWorkDuration gAPH_updateTargetWorkDurationFn = nullptr;
	APH_reportActualWorkDuration gAPH_reportActualWorkDurationFn = nullptr;
	APH_closeSession gAPH_closeSessionFn = nullptr;

	void ensureAPerformanceHintBindingInitialized() {
	if (gAPerformanceHintBindingInitialized) return;

	void* handle_ = dlopen("libandroid.so", RTLD_NOW \| RTLD_NODELETE);
	LOG_ALWAYS_FATAL_IF(handle_ == nullptr, "Failed to dlopen libandroid.so!");

	gAPH_getManagerFn = (APH_getManager)dlsym(handle_, "APerformanceHint_getManager");
	LOG_ALWAYS_FATAL_IF(gAPH_getManagerFn == nullptr,
	"Failed to find required symbol APerformanceHint_getManager!");

	gAPH_createSessionFn = (APH_createSession)dlsym(handle_, "APerformanceHint_createSession");
	LOG_ALWAYS_FATAL_IF(gAPH_createSessionFn == nullptr,
	"Failed to find required symbol APerformanceHint_createSession!");

	gAPH_updateTargetWorkDurationFn = (APH_updateTargetWorkDuration)dlsym(
	handle_, "APerformanceHint_updateTargetWorkDuration");
	LOG_ALWAYS_FATAL_IF(
	gAPH_updateTargetWorkDurationFn == nullptr,
	"Failed to find required symbol APerformanceHint_updateTargetWorkDuration!");

	gAPH_reportActualWorkDurationFn = (APH_reportActualWorkDuration)dlsym(
	handle_, "APerformanceHint_reportActualWorkDuration");
	LOG_ALWAYS_FATAL_IF(
	gAPH_reportActualWorkDurationFn == nullptr,
	"Failed to find required symbol APerformanceHint_reportActualWorkDuration!");

	gAPH_closeSessionFn = (APH_closeSession)dlsym(handle_, "APerformanceHint_closeSession");
	LOG_ALWAYS_FATAL_IF(gAPH_closeSessionFn == nullptr,
	"Failed to find required symbol APerformanceHint_closeSession!");

	gAPerformanceHintBindingInitialized = true;
	}

	} // namespace

	DrawFrameTask::DrawFrameTask()
	: mRenderThread(nullptr)
	, mContext(nullptr)
	, mContentDrawBounds(0, 0, 0, 0)
	, mSyncResult(SyncResult::OK) {}

	DrawFrameTask::~DrawFrameTask() {}

	void DrawFrameTask::setContext(RenderThread* thread, CanvasContext* context, RenderNode* targetNode,
	int32_t uiThreadId, int32_t renderThreadId) {
	mRenderThread = thread;
	mContext = context;
	mTargetNode = targetNode;
	mUiThreadId = uiThreadId;
	mRenderThreadId = renderThreadId;
	}

	void DrawFrameTask::pushLayerUpdate(DeferredLayerUpdater* layer) {
	LOG_ALWAYS_FATAL_IF(!mContext,
	"Lifecycle violation, there's no context to pushLayerUpdate with!");

	for (size_t i = 0; i < mLayers.size(); i++) {
	if (mLayers[i].get() == layer) {
	return;
	}
	}
	mLayers.push_back(layer);
	}

	void DrawFrameTask::removeLayerUpdate(DeferredLayerUpdater* layer) {
	for (size_t i = 0; i < mLayers.size(); i++) {
	if (mLayers[i].get() == layer) {
	mLayers.erase(mLayers.begin() + i);
	return;
	}
	}
	}

	int DrawFrameTask::drawFrame() {
	LOG_ALWAYS_FATAL_IF(!mContext, "Cannot drawFrame with no CanvasContext!");

	mSyncResult = SyncResult::OK;
	mSyncQueued = systemTime(SYSTEM_TIME_MONOTONIC);
	postAndWait();

	return mSyncResult;
	}

	void DrawFrameTask::postAndWait() {
	AutoMutex _lock(mLock);
	mRenderThread->queue().post([this]() { run(); });
	mSignal.wait(mLock);
	}

	void DrawFrameTask::run() {
	const int64_t vsyncId = mFrameInfo[static_cast<int>(FrameInfoIndex::FrameTimelineVsyncId)];
	ATRACE_FORMAT("DrawFrames %" PRId64, vsyncId);
	nsecs_t syncDelayDuration = systemTime(SYSTEM_TIME_MONOTONIC) - mSyncQueued;

	bool canUnblockUiThread;
	bool canDrawThisFrame;
	{
	TreeInfo info(TreeInfo::MODE_FULL, *mContext);
	canUnblockUiThread = syncFrameState(info);
	canDrawThisFrame = info.out.canDrawThisFrame;

	if (mFrameCompleteCallback) {
	mContext->addFrameCompleteListener(std::move(mFrameCompleteCallback));
	mFrameCompleteCallback = nullptr;
	}
	}

	// Grab a copy of everything we need
	CanvasContext* context = mContext;
	std::function<void(int64_t)> callback = std::move(mFrameCallback);
	mFrameCallback = nullptr;
	int64_t intendedVsync = mFrameInfo[static_cast<int>(FrameInfoIndex::IntendedVsync)];
	int64_t frameDeadline = mFrameInfo[static_cast<int>(FrameInfoIndex::FrameDeadline)];
	int64_t frameStartTime = mFrameInfo[static_cast<int>(FrameInfoIndex::FrameStartTime)];

	// From this point on anything in "this" is UNSAFE TO ACCESS
	if (canUnblockUiThread) {
	unblockUiThread();
	}

	// Even if we aren't drawing this vsync pulse the next frame number will still be accurate
	if (CC_UNLIKELY(callback)) {
	context->enqueueFrameWork(
	[callback, frameNr = context->getFrameNumber()]() { callback(frameNr); });
	}

	nsecs_t dequeueBufferDuration = 0;
	if (CC_LIKELY(canDrawThisFrame)) {
	dequeueBufferDuration = context->draw();
	} else {
	// Do a flush in case syncFrameState performed any texture uploads. Since we skipped
	// the draw() call, those uploads (or deletes) will end up sitting in the queue.
	// Do them now
	if (GrDirectContext* grContext = mRenderThread->getGrContext()) {
	grContext->flushAndSubmit();
	}
	// wait on fences so tasks don't overlap next frame
	context->waitOnFences();
	}

	if (!canUnblockUiThread) {
	unblockUiThread();
	}

	if (!mHintSessionWrapper) mHintSessionWrapper.emplace(mUiThreadId, mRenderThreadId);
	constexpr int64_t kSanityCheckLowerBound = 100000; // 0.1ms
	constexpr int64_t kSanityCheckUpperBound = 10000000000; // 10s
	int64_t targetWorkDuration = frameDeadline - intendedVsync;
	targetWorkDuration = targetWorkDuration * Properties::targetCpuTimePercentage / 100;
	if (targetWorkDuration > kSanityCheckLowerBound &&
	targetWorkDuration < kSanityCheckUpperBound &&
	targetWorkDuration != mLastTargetWorkDuration) {
	mLastTargetWorkDuration = targetWorkDuration;
	mHintSessionWrapper->updateTargetWorkDuration(targetWorkDuration);
	}
	int64_t frameDuration = systemTime(SYSTEM_TIME_MONOTONIC) - frameStartTime;
	int64_t actualDuration = frameDuration -
	(std::min(syncDelayDuration, mLastDequeueBufferDuration)) -
	dequeueBufferDuration;
	if (actualDuration > kSanityCheckLowerBound && actualDuration < kSanityCheckUpperBound) {
	mHintSessionWrapper->reportActualWorkDuration(actualDuration);
	}

	mLastDequeueBufferDuration = dequeueBufferDuration;
	}

	bool DrawFrameTask::syncFrameState(TreeInfo& info) {
	ATRACE_CALL();
	int64_t vsync = mFrameInfo[static_cast<int>(FrameInfoIndex::Vsync)];
	int64_t intendedVsync = mFrameInfo[static_cast<int>(FrameInfoIndex::IntendedVsync)];
	int64_t vsyncId = mFrameInfo[static_cast<int>(FrameInfoIndex::FrameTimelineVsyncId)];
	int64_t frameDeadline = mFrameInfo[static_cast<int>(FrameInfoIndex::FrameDeadline)];
	int64_t frameInterval = mFrameInfo[static_cast<int>(FrameInfoIndex::FrameInterval)];
	mRenderThread->timeLord().vsyncReceived(vsync, intendedVsync, vsyncId, frameDeadline,
	frameInterval);
	bool canDraw = mContext->makeCurrent();
	mContext->unpinImages();

	for (size_t i = 0; i < mLayers.size(); i++) {
	mLayers[i]->apply();
	}
	mLayers.clear();
	mContext->setContentDrawBounds(mContentDrawBounds);
	mContext->prepareTree(info, mFrameInfo, mSyncQueued, mTargetNode);

	// This is after the prepareTree so that any pending operations
	// (RenderNode tree state, prefetched layers, etc...) will be flushed.
	if (CC_UNLIKELY(!mContext->hasSurface() \|\| !canDraw)) {
	if (!mContext->hasSurface()) {
	mSyncResult \|= SyncResult::LostSurfaceRewardIfFound;
	} else {
	// If we have a surface but can't draw we must be stopped
	mSyncResult \|= SyncResult::ContextIsStopped;
	}
	info.out.canDrawThisFrame = false;
	}

	if (info.out.hasAnimations) {
	if (info.out.requiresUiRedraw) {
	mSyncResult \|= SyncResult::UIRedrawRequired;
	}
	}
	if (!info.out.canDrawThisFrame) {
	mSyncResult \|= SyncResult::FrameDropped;
	}
	// If prepareTextures is false, we ran out of texture cache space
	return info.prepareTextures;
	}

	void DrawFrameTask::unblockUiThread() {
	AutoMutex _lock(mLock);
	mSignal.signal();
	}

	DrawFrameTask::HintSessionWrapper::HintSessionWrapper(int32_t uiThreadId, int32_t renderThreadId) {
	if (!Properties::useHintManager) return;
	if (uiThreadId < 0 \|\| renderThreadId < 0) return;

	ensureAPerformanceHintBindingInitialized();

	APerformanceHintManager* manager = gAPH_getManagerFn();
	if (!manager) return;

	std::vector<int32_t> tids = CommonPool::getThreadIds();
	tids.push_back(uiThreadId);
	tids.push_back(renderThreadId);

	// DrawFrameTask code will always set a target duration before reporting actual durations.
	// So this is just a placeholder value that's never used.
	int64_t dummyTargetDurationNanos = 16666667;
	mHintSession =
	gAPH_createSessionFn(manager, tids.data(), tids.size(), dummyTargetDurationNanos);
	}

	DrawFrameTask::HintSessionWrapper::~HintSessionWrapper() {
	if (mHintSession) {
	gAPH_closeSessionFn(mHintSession);
	}
	}

	void DrawFrameTask::HintSessionWrapper::updateTargetWorkDuration(long targetDurationNanos) {
	if (mHintSession) {
	gAPH_updateTargetWorkDurationFn(mHintSession, targetDurationNanos);
	}
	}

	void DrawFrameTask::HintSessionWrapper::reportActualWorkDuration(long actualDurationNanos) {
	if (mHintSession) {
	gAPH_reportActualWorkDurationFn(mHintSession, actualDurationNanos);
	}
	}

	} /* namespace renderthread */
	} /* namespace uirenderer */
	} /* namespace android */