1 #ifndef DALI_INTERNAL_COMBINED_UPDATE_RENDER_CONTROLLER_H
2 #define DALI_INTERNAL_COMBINED_UPDATE_RENDER_CONTROLLER_H
5 * Copyright (c) 2020 Samsung Electronics Co., Ltd.
7 * Licensed under the Apache License, Version 2.0 (the "License");
8 * you may not use this file except in compliance with the License.
9 * You may obtain a copy of the License at
11 * http://www.apache.org/licenses/LICENSE-2.0
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
23 #include <semaphore.h>
26 #include <dali/devel-api/threading/conditional-wait.h>
27 #include <dali/devel-api/threading/semaphore.h>
28 #include <dali/integration-api/core.h>
31 #include <dali/integration-api/adaptor-framework/thread-synchronization-interface.h>
32 #include <dali/internal/adaptor/common/thread-controller-interface.h>
33 #include <dali/internal/system/common/fps-tracker.h>
34 #include <dali/internal/system/common/performance-interface.h>
35 #include <dali/internal/system/common/update-status-logger.h>
36 #include <dali/internal/window-system/common/display-connection.h>
41 class RenderSurfaceInterface;
42 class TriggerEventInterface;
50 class AdaptorInternalServices;
51 class EnvironmentOptions;
54 * @brief Two threads where events/application interaction is handled on the main/event thread and the Update & Render
55 * happen on the other thread.
59 * a. Main/Event Thread.
60 * b. Update/Render Thread.
61 * 2. There is NO VSync thread:
62 * a. We retrieve the time before Update.
63 * b. Then retrieve the time after Render.
64 * c. We calculate the difference between these two times and if:
65 * i. The difference is less than the default frame time, we sleep.
66 * ii. If it’s more or the same, we continue.
67 * 3. On the update/render thread, if we discover that we do not need to do any more updates, we use a trigger-event
68 * to inform the main/event thread. This is then processed as soon as the event thread is able to do so where it
69 * is easier to make a decision about whether we should stop the update/render thread or not (depending on any
70 * update requests etc.).
71 * 4. The main thread is blocked while the surface is being replaced.
72 * 5. When we resume from paused, elapsed time is used for the animations, i.e. the could have finished while we were paused.
73 * However, FinishedSignal emission will only happen upon resumption.
74 * 6. Elapsed time is NOT used while if we are waking up from a sleep state or doing an UpdateOnce.
76 class CombinedUpdateRenderController : public ThreadControllerInterface,
77 public ThreadSynchronizationInterface
84 CombinedUpdateRenderController( AdaptorInternalServices& adaptorInterfaces, const EnvironmentOptions& environmentOptions, ThreadMode threadMode );
87 * Non virtual destructor. Not intended as base class.
89 ~CombinedUpdateRenderController();
92 * @copydoc ThreadControllerInterface::Initialize()
94 void Initialize() override;
97 * @copydoc ThreadControllerInterface::Start()
99 void Start() override;
102 * @copydoc ThreadControllerInterface::Pause()
104 void Pause() override;
107 * @copydoc ThreadControllerInterface::Resume()
109 void Resume() override;
112 * @copydoc ThreadControllerInterface::Stop()
114 void Stop() override;
117 * @copydoc ThreadControllerInterface::RequestUpdate()
119 void RequestUpdate() override;
122 * @copydoc ThreadControllerInterface::RequestUpdateOnce()
124 void RequestUpdateOnce( UpdateMode updateMode ) override;
127 * @copydoc ThreadControllerInterface::ReplaceSurface()
129 void ReplaceSurface( Dali::RenderSurfaceInterface* surface ) override;
132 * @copydoc ThreadControllerInterface::DeleteSurface()
134 void DeleteSurface( Dali::RenderSurfaceInterface* surface ) override;
137 * @copydoc ThreadControllerInterface::ResizeSurface()
139 void ResizeSurface() override;
142 * @copydoc ThreadControllerInterface::WaitForGraphicsInitialization()
144 void WaitForGraphicsInitialization() override;
147 * @copydoc ThreadControllerInterface::SetRenderRefreshRate()
149 void SetRenderRefreshRate( unsigned int numberOfFramesPerRender ) override;
152 * @copydoc ThreadControllerInterface::SetPreRenderCallback
154 void SetPreRenderCallback( CallbackBase* callback ) override;
157 * @copydoc ThreadControllerInterface::AddSurface()
159 void AddSurface( Dali::RenderSurfaceInterface* surface ) override;
163 // Undefined copy constructor.
164 CombinedUpdateRenderController( const CombinedUpdateRenderController& );
166 // Undefined assignment operator.
167 CombinedUpdateRenderController& operator=( const CombinedUpdateRenderController& );
169 /////////////////////////////////////////////////////////////////////////////////////////////////
171 /////////////////////////////////////////////////////////////////////////////////////////////////
173 enum AnimationProgression
175 USE_ELAPSED_TIME, ///< Animation progression using elapsed time
176 NONE ///< No animation progression
180 * Runs the Update/Render Thread.
181 * This will lock the mutex in mUpdateRenderThreadWaitCondition.
183 * @param[in] numberOfCycles The number of times the update/render cycle should run. If -1, then it will run continuously.
184 * @param[in] animationProgression Whether to progress animation using time elapsed since the last frame.
185 * @param[in] updateMode The update mode (i.e. either update & render or skip rendering)
187 inline void RunUpdateRenderThread( int numberOfCycles, AnimationProgression animationProgression, UpdateMode updateMode );
190 * Pauses the Update/Render Thread.
191 * This will lock the mutex in mUpdateRenderThreadWaitCondition.
193 inline void PauseUpdateRenderThread();
196 * Stops the Update/Render Thread.
197 * This will lock the mutex in mUpdateRenderThreadWaitCondition.
199 * @note Should only be called in Stop as calling this will kill the update-thread.
201 inline void StopUpdateRenderThread();
204 * Checks if the the Update/Render Thread is paused.
205 * This will lock the mutex in mUpdateRenderThreadWaitCondition.
207 * @return true if paused, false otherwise
209 inline bool IsUpdateRenderThreadPaused();
212 * Used as the callback for the sleep-trigger.
214 * Will sleep when enough requests are made without any requests.
216 void ProcessSleepRequest();
218 /////////////////////////////////////////////////////////////////////////////////////////////////
219 // UpdateRenderThread
220 /////////////////////////////////////////////////////////////////////////////////////////////////
223 * The Update/Render thread loop. This thread will be destroyed on exit from this function.
225 void UpdateRenderThread();
228 * Called by the Update/Render Thread which ensures a wait if required.
230 * @param[out] useElapsedTime If true when returned, then the actual elapsed time will be used for animation.
231 * If false when returned, then there should NOT be any animation progression in the next Update.
232 * @param[in] updateRequired Whether another update is required.
233 * @param[out] timeToSleepUntil The time remaining in nanoseconds to keep the thread sleeping before resuming.
234 * @return false, if the thread should stop.
236 bool UpdateRenderReady( bool& useElapsedTime, bool updateRequired, uint64_t& timeToSleepUntil );
239 * Checks to see if the surface needs to be replaced.
240 * This will lock the mutex in mUpdateRenderThreadWaitCondition.
242 * @return Pointer to the new surface, NULL otherwise
244 Dali::RenderSurfaceInterface* ShouldSurfaceBeReplaced();
247 * Called by the Update/Render thread after a surface has been replaced.
249 * This will lock the mutex in mEventThreadWaitCondition
251 void SurfaceReplaced();
254 * Checks to see if the surface needs to be deleted.
255 * This will lock the mutex in mUpdateRenderThreadWaitCondition.
257 * @return Pointer to the deleted surface, nullptr otherwise
259 Dali::RenderSurfaceInterface* ShouldSurfaceBeDeleted();
262 * Called by the Update/Render thread after a surface has been deleted.
264 * This will lock the mutex in mEventThreadWaitCondition
266 void SurfaceDeleted();
269 * Checks to see if the surface needs to be resized.
270 * This will lock the mutex in mUpdateRenderThreadWaitCondition.
272 * @return true if the surface should be resized, false otherwise
274 bool ShouldSurfaceBeResized();
277 * Called by the Update/Render thread after a surface has been resized.
279 * This will lock the mutex in mEventThreadWaitCondition
281 void SurfaceResized();
284 * Helper for the thread calling the entry function
285 * @param[in] This A pointer to the current object
287 static void* InternalUpdateRenderThreadEntryFunc( void* This )
289 ( static_cast<CombinedUpdateRenderController*>( This ) )->UpdateRenderThread();
293 /////////////////////////////////////////////////////////////////////////////////////////////////
295 /////////////////////////////////////////////////////////////////////////////////////////////////
298 * Called by the update-render & v-sync threads when they up and running.
300 * This will lock the mutex in mEventThreadWaitCondition.
302 void NotifyThreadInitialised();
305 * Called by the update-render thread when graphics has been initialised.
307 void NotifyGraphicsInitialised();
310 * Helper to add a performance marker to the performance server (if it's active)
311 * @param[in] type performance marker type
313 void AddPerformanceMarker( PerformanceInterface::MarkerType type );
315 /////////////////////////////////////////////////////////////////////////////////////////////////
316 // POST RENDERING - ThreadSynchronizationInterface overrides
317 /////////////////////////////////////////////////////////////////////////////////////////////////
319 /////////////////////////////////////////////////////////////////////////////////////////////////
320 //// Called by the Event Thread if post-rendering is required
321 /////////////////////////////////////////////////////////////////////////////////////////////////
324 * @copydoc ThreadSynchronizationInterface::PostRenderComplete()
326 void PostRenderComplete() override;
328 /////////////////////////////////////////////////////////////////////////////////////////////////
329 //// Called by the Render Thread if post-rendering is required
330 /////////////////////////////////////////////////////////////////////////////////////////////////
333 * @copydoc ThreadSynchronizationInterface::PostRenderStarted()
335 void PostRenderStarted() override;
338 * @copydoc ThreadSynchronizationInterface::PostRenderStarted()
340 void PostRenderWaitForCompletion() override;
344 FpsTracker mFpsTracker; ///< Object that tracks the FPS
345 UpdateStatusLogger mUpdateStatusLogger; ///< Object that logs the update-status as required.
347 Semaphore<> mEventThreadSemaphore; ///< Used by the event thread to ensure all threads have been initialised, and when replacing the surface.
348 ConditionalWait mGraphicsInitializeWait; ///< Used by the render thread to ensure the graphics has been initialised.
349 Semaphore<> mSurfaceSemaphore; ///< Used by the event thread to ensure the surface has been deleted or replaced.
351 ConditionalWait mUpdateRenderThreadWaitCondition; ///< The wait condition for the update-render-thread.
353 AdaptorInternalServices& mAdaptorInterfaces; ///< The adaptor internal interface
354 PerformanceInterface* mPerformanceInterface; ///< The performance logging interface
355 Integration::Core& mCore; ///< Dali core reference
356 const EnvironmentOptions& mEnvironmentOptions; ///< Environment options
357 TriggerEventInterface& mNotificationTrigger; ///< Reference to notification event trigger
358 TriggerEventInterface* mSleepTrigger; ///< Used by the update-render thread to trigger the event thread when it no longer needs to do any updates
359 CallbackBase* mPreRenderCallback; ///< Used by Update/Render thread when PreRender is about to be called on graphics.
361 pthread_t* mUpdateRenderThread; ///< The Update/Render thread.
363 float mDefaultFrameDelta; ///< Default time delta between each frame (used for animations). Not protected by lock, but written to rarely so not worth adding a lock when reading.
364 // TODO: mDefaultFrameDurationMilliseconds is defined as uint64_t, the only place where it is used, it is converted to an unsigned int!!!
365 uint64_t mDefaultFrameDurationMilliseconds; ///< Default duration of a frame (used for predicting the time of the next frame). Not protected by lock, but written to rarely so not worth adding a lock when reading.
366 uint64_t mDefaultFrameDurationNanoseconds; ///< Default duration of a frame (used for sleeping if not enough time elapsed). Not protected by lock, but written to rarely so not worth adding a lock when reading.
367 uint64_t mDefaultHalfFrameNanoseconds; ///< Is half of mDefaultFrameDurationNanoseconds. Using a member variable avoids having to do the calculation every frame. Not protected by lock, but written to rarely so not worth adding a lock when reading.
369 unsigned int mUpdateRequestCount; ///< Count of update-requests we have received to ensure we do not go to sleep too early.
370 unsigned int mRunning; ///< Read and set on the event-thread only to state whether we are running.
372 ThreadMode mThreadMode; ///< Whether the thread runs continuously or runs when it is requested.
375 // NOTE: cannot use booleans as these are used from multiple threads, must use variable with machine word size for atomic read/write
378 volatile int mUpdateRenderRunCount; ///< The number of times Update/Render cycle should run. If -1, then will run continuously (set by the event-thread, read by v-sync-thread).
379 volatile unsigned int mDestroyUpdateRenderThread; ///< Whether the Update/Render thread be destroyed (set by the event-thread, read by the update-render-thread).
380 volatile unsigned int mUpdateRenderThreadCanSleep; ///< Whether the Update/Render thread can sleep (set by the event-thread, read by the update-render-thread).
381 volatile unsigned int mPendingRequestUpdate; ///< Is set as soon as an RequestUpdate is made and unset when the next update happens (set by the event-thread and update-render thread, read by the update-render-thread).
382 ///< Ensures we do not go to sleep if we have not processed the most recent update-request.
384 volatile unsigned int mUseElapsedTimeAfterWait; ///< Whether we should use the elapsed time after waiting (set by the event-thread, read by the update-render-thread).
386 Dali::RenderSurfaceInterface* volatile mNewSurface; ///< Will be set to the new-surface if requested (set by the event-thread, read & cleared by the update-render thread).
387 Dali::RenderSurfaceInterface* volatile mDeletedSurface; ///< Will be set to the deleted surface if requested (set by the event-thread, read & cleared by the update-render thread).
389 volatile unsigned int mPostRendering; ///< Whether post-rendering is taking place (set by the event & render threads, read by the render-thread).
390 volatile unsigned int mSurfaceResized; ///< Will be set to resize the surface (set by the event-thread, read & cleared by the update-render thread).
391 volatile unsigned int mForceClear; ///< Will be set to clear forcibly
393 volatile unsigned int mUploadWithoutRendering; ///< Will be set to upload the resource only (with no rendering)
395 volatile unsigned int mFirstFrameAfterResume; ///< Will be set to check the first frame after resume (for log)
397 std::vector<Rect<int>> mDamagedRects; ///< Keeps collected damaged render items rects for one render pass
400 } // namespace Adaptor
402 } // namespace Internal
406 #endif // DALI_INTERNAL_COMBINED_UPDATE_RENDER_CONTROLLER_H