1 #ifndef DALI_INTERNAL_UPDATE_MESSAGE_QUEUE_H
2 #define DALI_INTERNAL_UPDATE_MESSAGE_QUEUE_H
5 * Copyright (c) 2023 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>
32 class RenderController;
41 class SceneGraphBuffers;
47 * Used by UpdateManager to receive messages from the event-thread.
53 * Create a new UpdateMessageQueue.
54 * @param[in] renderController After messages are flushed, we request a render from the RenderController.
55 * @param[in] sceneGraphBuffers Used to keep track of which buffers are being written or read.
57 MessageQueue(Integration::RenderController& renderController,
58 const SceneGraph::SceneGraphBuffers& sceneGraphBuffers);
66 * Inform the queue that event processing has started
68 void EventProcessingStarted();
71 * Inform the queue that event processing has finished
73 void EventProcessingFinished();
76 * Reserve space for a message
77 * @param[in] size the message size with respect to the size of type 'char'
78 * @param[in] updateScene If set to true, denotes that the message will cause the scene graph node tree to require an update
79 * @return A pointer to the first char allocated for the message
81 uint32_t* ReserveMessageSlot(uint32_t size, bool updateScene);
84 * Flushes the message queue
85 * @return true if there are messages to process
89 // Exclusive to UpdateManager
92 * Called once per update; process the previously flushed messages.
93 * @param updateBufferIndex to use
94 * @return true if the scene graph node tree is updated
96 bool ProcessMessages(BufferIndex updateBufferIndex);
99 * Query whether the queue was empty this frame.
101 bool WasEmpty() const;
104 * Query whether the queue contains at least one message that requires that the scene-graph
105 * node tree be updated.
106 * @return A flag, true if the scene graph needs an update
108 bool IsSceneUpdateRequired() const;
111 * Query for the capacity of the current message queue
113 std::size_t GetCapacity() const;
117 * Helper to call Process and destructor on each queued message
118 * @param[in] minorQueue The queue to process.
120 void ProcessMinorQueue(char* minorQueue);
124 MessageQueue() = delete;
125 MessageQueue(const MessageQueue& rhs) = delete;
126 MessageQueue& operator=(const MessageQueue& rhs) = delete;
133 } // namespace Update
135 } // namespace Internal
139 #endif // DALI_INTERNAL_UPDATE_MESSAGE_QUEUE_H