1 #ifndef DALI_INTERNAL_ADAPTOR_SYSTEM_COMMON_CALLBACK_MANAGER_H
2 #define DALI_INTERNAL_ADAPTOR_SYSTEM_COMMON_CALLBACK_MANAGER_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/public-api/signals/callback.h>
25 #include <dali/public-api/dali-adaptor-common.h>
34 * Abstract interface to install call backs in to an applications main loop.
42 virtual ~CallbackManager()
47 * @brief Adds a @p callback to be run on idle.
48 * @note Must be called from the main thread only.
50 * Callbacks of the following types may be used:
54 * This callback will be deleted once it is called.
59 * This callback will be called repeatedly as long as it returns true. A return of 0 deletes this callback.
61 * @param[in] callback custom callback function.
62 * @param[in] hasReturnValue Sould be set to true if the callback function has a return value.
64 * @return true on success
66 virtual bool AddIdleCallback(CallbackBase* callback, bool hasReturnValue) = 0;
69 * @brief Removes a previously added @p callback.
70 * @note Must be called from main thread only.
72 * Does nothing if the @p callback doesn't exist.
74 * @param[in] callback The callback to be removed.
76 virtual void RemoveIdleCallback(CallbackBase* callback) = 0;
79 * @brief Processes the idle callbacks.
81 * @return whether a DALi callback has been processed.
83 virtual bool ProcessIdle() = 0;
86 * @brief Clears the container of callbacks.
88 virtual void ClearIdleCallbacks() = 0;
91 * @brief Adds a @p callback to be run when entering an idle state.
92 * @note Must be called from the main thread only.
94 * A callback of the following type should be used:
98 * This callback will be called repeatedly as long as it returns true. A return of 0 deletes this callback.
100 * @param[in] callback custom callback function.
102 * @return true on success
104 virtual bool AddIdleEntererCallback(CallbackBase* callback) = 0;
107 * @brief Removes a previously added the idle enterer callback.
108 * @note Must be called from main thread only.
110 * Does nothing if the @p callback doesn't exist.
112 * @param[in] callback The callback to be removed.
114 virtual void RemoveIdleEntererCallback(CallbackBase* callback) = 0;
117 * Starts the callback manager.
119 virtual void Start() = 0;
122 * Stop the callback manager and can remove all pending callbacks synchronously.
123 * This call will synchronise with the main loop and not return
124 * until all call backs have been deleted.
126 virtual void Stop() = 0;
137 // Undefined copy constructor.
138 CallbackManager(const CallbackManager&);
140 // Undefined assignment operator.
141 CallbackManager& operator=(const CallbackManager&);
144 } // namespace Adaptor
146 } // namespace Internal
150 #endif // DALI_INTERNAL_ADAPTOR_SYSTEM_COMMON_CALLBACK_MANAGER_H