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EcoreMainloop.cs
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EcoreMainloop.cs
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/*
* Copyright (c) 2016 Samsung Electronics Co., Ltd All Rights Reserved
*
* Licensed under the Apache License, Version 2.0 (the License);
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an AS IS BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
using System;
using System.Collections.Concurrent;
namespace ElmSharp
{
/// <summary>
/// EcoreMainloop is a helper class, which provides the functions relative to Ecore's main loop.
/// </summary>
/// <since_tizen> preview </since_tizen>
public static class EcoreMainloop
{
static readonly ConcurrentDictionary<int, Func<bool>> _taskMap = new ConcurrentDictionary<int, Func<bool>>();
static readonly Object _taskLock = new Object();
static int _newTaskId = 0;
static Interop.Ecore.EcoreTaskCallback _nativeHandler;
static EcoreMainloop()
{
Interop.Ecore.ecore_init();
Interop.Ecore.ecore_main_loop_glib_integrate();
_nativeHandler = NativeHandler;
}
/// <summary>
/// Checks if you are calling this function from the main thread.
/// </summary>
/// <remarks>True if the calling function is the same thread, false otherwise.</remarks>
/// <since_tizen> preview </since_tizen>
public static bool IsMainThread => Interop.Eina.eina_main_loop_is();
/// <summary>
/// Runs the application main loop.
/// </summary>
/// <since_tizen> preview </since_tizen>
public static void Begin()
{
Interop.Ecore.ecore_main_loop_begin();
}
/// <summary>
/// Quits the main loop, once all the events currently on the queue have been processed.
/// </summary>
/// <since_tizen> preview </since_tizen>
public static void Quit()
{
Interop.Ecore.ecore_main_loop_quit();
}
/// <summary>
/// Adds an idler handler.
/// </summary>
/// <param name="task">The action to call when idle.</param>
/// <since_tizen> preview </since_tizen>
public static void Post(Action task)
{
int id = RegistHandler(() => { task(); return false; });
Interop.Ecore.ecore_idler_add(_nativeHandler, (IntPtr)id);
}
/// <summary>
/// Calls the callback asynchronously in the main loop.
/// </summary>
/// <param name="task">The action wanted to be called.</param>
/// <since_tizen> preview </since_tizen>
public static void PostAndWakeUp(Action task)
{
if (IsMainThread)
{
Post(task);
}
else
{
int id = RegistHandler(() => { task(); return false; });
Interop.Ecore.ecore_main_loop_thread_safe_call_async(_nativeHandler, (IntPtr)id);
}
}
/// <summary>
/// Calls the callback synchronously in the main loop.
/// </summary>
/// <param name="task">The action wanted to be called.</param>
/// <since_tizen> preview </since_tizen>
public static void Send(Action task)
{
int id = RegistHandler(() => { task(); return false; });
Interop.Ecore.ecore_main_loop_thread_safe_call_sync(_nativeHandler, (IntPtr)id);
}
/// <summary>
/// Creates a timer to call the given function in the given period of time.
/// </summary>
/// <param name="interval">The interval in seconds.</param>
/// <param name="handler">The given function.</param>
/// <returns>A timer object handler on success, or null on failure.</returns>
/// <since_tizen> preview </since_tizen>
public static IntPtr AddTimer(double interval, Func<bool> handler)
{
int id = RegistHandler(handler);
return Interop.Ecore.ecore_timer_add(interval, _nativeHandler, (IntPtr)id);
}
/// <summary>
/// Removes the specified timer from the timer list.
/// </summary>
/// <param name="id">The specified timer handler</param>
/// <since_tizen> preview </since_tizen>
public static void RemoveTimer(IntPtr id)
{
int taskId = (int)Interop.Ecore.ecore_timer_del(id);
Func<bool> unused;
_taskMap.TryRemove(taskId, out unused);
}
static int RegistHandler(Func<bool> task)
{
int taskId;
lock (_taskLock)
{
taskId = _newTaskId++;
}
_taskMap[taskId] = task;
return taskId;
}
static bool NativeHandler(IntPtr user_data)
{
int task_id = (int)user_data;
Func<bool> userAction = null;
if (_taskMap.TryGetValue(task_id, out userAction))
{
bool result = false;
if (userAction != null)
{
result = userAction();
}
if (!result)
{
_taskMap.TryRemove(task_id, out userAction);
}
return result;
}
return false;
}
}
}