Dali 3D User Interface Engine
update-thread.cpp
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1 /*
2  * Copyright (c) 2015 Samsung Electronics Co., Ltd.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  *
16  */
17 
18 // CLASS HEADER
19 #include "update-thread.h"
20 
21 // EXTERNAL INCLUDES
22 #include <cstdio>
23 
24 // INTERNAL INCLUDES
29 
30 namespace Dali
31 {
32 
33 namespace Internal
34 {
35 
36 namespace Adaptor
37 {
38 
39 namespace
40 {
41 #if defined(DEBUG_ENABLED)
42 Integration::Log::Filter* gUpdateLogFilter = Integration::Log::Filter::New(Debug::NoLogging, false, "LOG_UPDATE_THREAD");
43 #endif
44 } // unnamed namespace
45 
47  AdaptorInternalServices& adaptorInterfaces,
48  const EnvironmentOptions& environmentOptions )
49 : mThreadSynchronization( sync ),
50  mCore( adaptorInterfaces.GetCore()),
51  mFpsTracker( environmentOptions ),
52  mUpdateStatusLogger( environmentOptions ),
53  mThread( NULL ),
54  mEnvironmentOptions( environmentOptions )
55 {
56 }
57 
59 {
60  Stop();
61 }
62 
64 {
65  DALI_LOG_INFO( gUpdateLogFilter, Debug::Verbose, "UpdateThread::Start()\n");
66  if ( !mThread )
67  {
68  // Create and run the update-thread
69  mThread = new pthread_t();
70  int error = pthread_create( mThread, NULL, InternalThreadEntryFunc, this );
71  DALI_ASSERT_ALWAYS( !error && "Return code from pthread_create() in UpdateThread" );
72  }
73 }
74 
76 {
77  DALI_LOG_INFO( gUpdateLogFilter, Debug::Verbose, "UpdateThread::Stop()\n");
78  if( mThread )
79  {
80  // wait for the thread to finish
81  pthread_join(*mThread, NULL);
82 
83  delete mThread;
84  mThread = NULL;
85  }
86 }
87 
89 {
90  DALI_LOG_INFO( gUpdateLogFilter, Debug::Verbose, "UpdateThread::Run()\n");
91 
92  // Install a function for logging
94 
96  bool runUpdate = true;
97  float lastFrameDelta( 0.0f );
98  unsigned int lastSyncTime( 0 );
99  unsigned int nextSyncTime( 0 );
100 
101  // Update loop, we stay inside here while the update-thread is running
102  // We also get the last delta and the predict when this update will be rendered
103  while ( mThreadSynchronization.UpdateReady( status.NeedsNotification(), runUpdate, lastFrameDelta, lastSyncTime, nextSyncTime ) )
104  {
105  DALI_LOG_INFO( gUpdateLogFilter, Debug::Verbose, "UpdateThread::Run. 1 - UpdateReady(delta:%f, lastSync:%u, nextSync:%u)\n", lastFrameDelta, lastSyncTime, nextSyncTime);
106 
107  DALI_LOG_INFO( gUpdateLogFilter, Debug::Verbose, "UpdateThread::Run. 2 - Core.Update()\n");
108 
110  mCore.Update( lastFrameDelta, lastSyncTime, nextSyncTime, status );
112 
114 
115  unsigned int keepUpdatingStatus = status.KeepUpdating();
116 
117  // Optional logging of update/render status
118  mUpdateStatusLogger.Log( keepUpdatingStatus );
119 
120  // 2 things can keep update running.
121  // - The status of the last update
122  // - The status of the last render
123  runUpdate = (Integration::KeepUpdating::NOT_REQUESTED != keepUpdatingStatus);
124 
125  DALI_LOG_INFO( gUpdateLogFilter, Debug::Verbose, "UpdateThread::Run. 3 - runUpdate(%d)\n", runUpdate );
126 
127  // Reset time variables
128  lastFrameDelta = 0.0f;
129  lastSyncTime = 0;
130  nextSyncTime = 0;
131  }
132 
133  // Uninstall the logging function
135 
136  return true;
137 }
138 
139 } // namespace Adaptor
140 
141 } // namespace Internal
142 
143 } // namespace Dali
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