2 * Copyright (c) 2014 Samsung Electronics Co., Ltd.
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
8 * http://www.apache.org/licenses/LICENSE-2.0
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.
19 #include <dali/internal/event/common/notification-manager.h>
22 #include <dali/public-api/common/dali-common.h>
23 #include <dali/devel-api/common/owner-container.h>
24 #include <dali/devel-api/threading/mutex.h>
25 #include <dali/internal/common/message.h>
26 #include <dali/internal/event/common/property-notification-impl.h>
27 #include <dali/internal/event/common/complete-notification-interface.h>
37 typedef Dali::Vector< CompleteNotificationInterface* > InterfaceContainer;
40 * helper to move elements from one container to another
41 * @param from where to move
42 * @param to move target
44 void MoveElements( InterfaceContainer& from, InterfaceContainer& to )
46 // check if there's something in from
47 const InterfaceContainer::SizeType fromCount = from.Count();
50 // check if to has some elements
51 const InterfaceContainer::SizeType toCount = to.Count();
54 // to is empty so we can swap with from
59 to.Reserve( toCount + fromCount );
60 for( InterfaceContainer::SizeType i = 0; i < fromCount; ++i )
62 to.PushBack( from[ i ] );
70 using MessageQueueMutex = Dali::Mutex;
71 using MessageContainer = OwnerContainer<MessageBase*>;
73 struct NotificationManager::Impl
77 // reserve space on the vectors to avoid reallocs
78 // applications typically have up-to 20-30 notifications at startup
79 updateCompletedMessageQueue.Reserve( 32 );
80 updateWorkingMessageQueue.Reserve( 32 );
81 eventMessageQueue.Reserve( 32 );
83 // only a few manager objects get complete notifications (animation, render list, property notifications, ...)
84 updateCompletedInterfaceQueue.Reserve( 4 );
85 updateWorkingInterfaceQueue.Reserve( 4 );
86 eventInterfaceQueue.Reserve( 4 );
91 // queueMutex must be locked whilst accessing queue
92 MessageQueueMutex queueMutex;
93 // three queues for objects owned by notification manager
94 MessageContainer updateCompletedMessageQueue;
95 MessageContainer updateWorkingMessageQueue;
96 MessageContainer eventMessageQueue;
97 // three queues for objects referenced by notification manager
98 InterfaceContainer updateCompletedInterfaceQueue;
99 InterfaceContainer updateWorkingInterfaceQueue;
100 InterfaceContainer eventInterfaceQueue;
103 NotificationManager::NotificationManager()
108 NotificationManager::~NotificationManager()
113 void NotificationManager::QueueCompleteNotification( CompleteNotificationInterface* instance )
115 // queueMutex must be locked whilst accessing queues
116 MessageQueueMutex::ScopedLock lock( mImpl->queueMutex );
118 mImpl->updateWorkingInterfaceQueue.PushBack( instance );
121 void NotificationManager::QueueMessage( MessageBase* message )
123 DALI_ASSERT_DEBUG( NULL != message );
125 // queueMutex must be locked whilst accessing queues
126 MessageQueueMutex::ScopedLock lock( mImpl->queueMutex );
128 mImpl->updateWorkingMessageQueue.PushBack( message );
131 void NotificationManager::UpdateCompleted()
133 // queueMutex must be locked whilst accessing queues
134 MessageQueueMutex::ScopedLock lock( mImpl->queueMutex );
135 // Move messages from update working queue to completed queue
136 // note that in theory its possible for update completed to have last frames
137 // events as well still hanging around. we need to keep them as well
138 mImpl->updateCompletedMessageQueue.MoveFrom( mImpl->updateWorkingMessageQueue );
139 // move pointers from interface queue
140 MoveElements( mImpl->updateWorkingInterfaceQueue, mImpl->updateCompletedInterfaceQueue );
141 // finally the lock is released
144 bool NotificationManager::MessagesToProcess()
146 // queueMutex must be locked whilst accessing queues
147 MessageQueueMutex::ScopedLock lock( mImpl->queueMutex );
149 return ( 0u < mImpl->updateCompletedMessageQueue.Count() ||
150 ( 0u < mImpl->updateCompletedInterfaceQueue.Count() ) );
153 void NotificationManager::ProcessMessages()
155 // queueMutex must be locked whilst accessing queues
157 MessageQueueMutex::ScopedLock lock( mImpl->queueMutex );
159 // Move messages from update completed queue to event queue
160 // note that in theory its possible for event queue to have
161 // last frames events as well still hanging around so need to keep them
162 mImpl->eventMessageQueue.MoveFrom( mImpl->updateCompletedMessageQueue );
163 MoveElements( mImpl->updateCompletedInterfaceQueue, mImpl->eventInterfaceQueue );
165 // end of scope, lock is released
167 MessageContainer::Iterator iter = mImpl->eventMessageQueue.Begin();
168 const MessageContainer::Iterator end = mImpl->eventMessageQueue.End();
169 for( ; iter != end; ++iter )
171 (*iter)->Process( 0u/*ignored*/ );
173 // release the processed messages from event side queue
174 mImpl->eventMessageQueue.Clear();
176 InterfaceContainer::Iterator iter2 = mImpl->eventInterfaceQueue.Begin();
177 const InterfaceContainer::Iterator end2 = mImpl->eventInterfaceQueue.End();
178 for( ; iter2 != end2; ++iter2 )
180 CompleteNotificationInterface* interface = *iter2;
183 interface->NotifyCompleted();
186 // just clear the container, we dont own the objects
187 mImpl->eventInterfaceQueue.Clear();
190 } // namespace Internal