1 #ifndef DALI_INTERNAL_UPDATE_MESSAGE_QUEUE_H
2 #define DALI_INTERNAL_UPDATE_MESSAGE_QUEUE_H
5 * Copyright (c) 2021 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.
22 #include <dali/internal/common/buffer-index.h>
23 #include <dali/internal/update/common/scene-graph-buffers.h>
29 class RenderController;
38 class SceneGraphBuffers;
44 * Used by UpdateManager to receive messages from the event-thread.
50 * Create a new UpdateMessageQueue.
51 * @param[in] renderController After messages are flushed, we request a render from the RenderController.
52 * @param[in] sceneGraphBuffers Used to keep track of which buffers are being written or read.
54 MessageQueue(Integration::RenderController& renderController,
55 const SceneGraph::SceneGraphBuffers& sceneGraphBuffers);
63 * Inform the queue that event processing has started
65 void EventProcessingStarted();
68 * Reserve space for a message
69 * @param[in] size the message size with respect to the size of type 'char'
70 * @param[in] updateScene If set to true, denotes that the message will cause the scene graph node tree to require an update
71 * @return A pointer to the first char allocated for the message
73 uint32_t* ReserveMessageSlot(uint32_t size, bool updateScene);
76 * Flushes the message queue
77 * @return true if there are messages to process
81 // Exclusive to UpdateManager
84 * Called once per update; process the previously flushed messages.
85 * @param updateBufferIndex to use
86 * @return true if the scene graph node tree is updated
88 bool ProcessMessages(BufferIndex updateBufferIndex);
91 * Query whether the queue was empty this frame.
93 bool WasEmpty() const;
96 * Query whether the queue contains at least one message that requires that the scene-graph
97 * node tree be updated.
98 * @return A flag, true if the scene graph needs an update
100 bool IsSceneUpdateRequired() const;
104 * Helper to call Process and destructor on each queued message
105 * @param[in] minorQueue The queue to process.
107 void ProcessMinorQueue(char* minorQueue);
111 MessageQueue() = delete;
112 MessageQueue(const MessageQueue& rhs) = delete;
113 MessageQueue& operator=(const MessageQueue& rhs) = delete;
120 } // namespace Update
122 } // namespace Internal
126 #endif // DALI_INTERNAL_UPDATE_MESSAGE_QUEUE_H