[ElmSharp] Fix EcoreMainloop crash issue in multi thread
[platform/core/csapi/tizenfx.git] / src / ElmSharp / ElmSharp / EcoreMainloop.cs
1 /*
2  * Copyright (c) 2016 Samsung Electronics Co., Ltd All Rights Reserved
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 using System;
18 using System.Collections.Concurrent;
19
20 namespace ElmSharp
21 {
22     /// <summary>
23     /// EcoreMainloop is a helper class, it provide functions relative Ecore's main loop.
24     /// </summary>
25     /// <since_tizen> preview </since_tizen>
26     public static class EcoreMainloop
27     {
28
29         static readonly ConcurrentDictionary<int, Func<bool>> _taskMap = new ConcurrentDictionary<int, Func<bool>>();
30         static readonly Object _taskLock = new Object();
31         static int _newTaskId = 0;
32
33         static Interop.Ecore.EcoreTaskCallback _nativeHandler;
34
35         static EcoreMainloop()
36         {
37             Interop.Ecore.ecore_init();
38             Interop.Ecore.ecore_main_loop_glib_integrate();
39             _nativeHandler = NativeHandler;
40         }
41
42         /// <summary>
43         /// Checks if you are calling this function from the main thread.
44         /// </summary>
45         /// <remarks>True is the calling function is the same thread, false otherwise.</remarks>
46         /// <since_tizen> preview </since_tizen>
47         public static bool IsMainThread => Interop.Eina.eina_main_loop_is();
48
49         /// <summary>
50         /// Runs the application main loop.
51         /// </summary>
52         /// <since_tizen> preview </since_tizen>
53         public static void Begin()
54         {
55             Interop.Ecore.ecore_main_loop_begin();
56         }
57
58         /// <summary>
59         /// Quits the main loop once all the events currently on the queue have been processed.
60         /// </summary>
61         /// <since_tizen> preview </since_tizen>
62         public static void Quit()
63         {
64             Interop.Ecore.ecore_main_loop_quit();
65         }
66
67         /// <summary>
68         /// Adds an idler handler.
69         /// </summary>
70         /// <param name="task">The action to call when idling</param>
71         /// <since_tizen> preview </since_tizen>
72         public static void Post(Action task)
73         {
74             int id = RegistHandler(() => { task(); return false; });
75             Interop.Ecore.ecore_idler_add(_nativeHandler, (IntPtr)id);
76         }
77
78         /// <summary>
79         /// Calls callback asynchronously in the main loop.
80         /// </summary>
81         /// <param name="task">The action wanted to be called</param>
82         /// <since_tizen> preview </since_tizen>
83         public static void PostAndWakeUp(Action task)
84         {
85             int id = RegistHandler(() => { task(); return false; });
86             Interop.Ecore.ecore_main_loop_thread_safe_call_async(_nativeHandler, (IntPtr)id);
87         }
88
89         /// <summary>
90         /// Calls callback synchronously in the main loop.
91         /// </summary>
92         /// <param name="task">The action wanted to be called</param>
93         /// <since_tizen> preview </since_tizen>
94         public static void Send(Action task)
95         {
96             int id = RegistHandler(() => { task(); return false; });
97             Interop.Ecore.ecore_main_loop_thread_safe_call_sync(_nativeHandler, (IntPtr)id);
98         }
99
100         /// <summary>
101         /// Creates a timer to call the given function in the given period of time.
102         /// </summary>
103         /// <param name="interval">The interval in seconds.</param>
104         /// <param name="handler">The given function.</param>
105         /// <returns>A timer object handler on success, NULL on failure.</returns>
106         /// <since_tizen> preview </since_tizen>
107         public static IntPtr AddTimer(double interval, Func<bool> handler)
108         {
109             int id = RegistHandler(handler);
110             return Interop.Ecore.ecore_timer_add(interval, _nativeHandler, (IntPtr)id);
111         }
112
113         /// <summary>
114         /// Removes the specified timer from the timer list.
115         /// </summary>
116         /// <param name="id">The specified timer handler</param>
117         /// <since_tizen> preview </since_tizen>
118         public static void RemoveTimer(IntPtr id)
119         {
120             int taskId = (int)Interop.Ecore.ecore_timer_del(id);
121             Func<bool> unused;
122             _taskMap.TryRemove(taskId, out unused);
123         }
124
125         static int RegistHandler(Func<bool> task)
126         {
127             int taskId;
128             lock (_taskLock)
129             {
130                 taskId = _newTaskId++;
131             }
132             _taskMap[taskId] = task;
133             return taskId;
134         }
135
136         static bool NativeHandler(IntPtr user_data)
137         {
138             int task_id = (int)user_data;
139             Func<bool> userAction = null;
140             if (_taskMap.TryGetValue(task_id, out userAction))
141             {
142                 bool result = false;
143
144                 if (userAction != null)
145                 {
146                     result = userAction();
147                 }
148
149                 if (!result)
150                 {
151                     _taskMap.TryRemove(task_id, out userAction);
152                 }
153                 return result;
154             }
155             return false;
156         }
157     }
158 }