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// GLib.Idle.cs - Idle class implementation
//
// Author(s):
// Mike Kestner <mkestner@speakeasy.net>
// Rachel Hestilow <hestilow@ximian.com>
// Stephane Delcroix <stephane@delcroix.org>
//
// Copyright (c) 2002 Mike Kestner
// Copyright (c) Rachel Hestilow
// Copyright (c) 2009 Novell, Inc.
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of version 2 of the Lesser GNU General
// Public License as published by the Free Software Foundation.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this program; if not, write to the
// Free Software Foundation, Inc., 59 Temple Place - Suite 330,
// Boston, MA 02111-1307, USA.
namespace Gst.GLib {
using System;
using System.Collections;
using System.Runtime.InteropServices;
public delegate bool IdleHandler ();
public class Idle {
[UnmanagedFunctionPointer (CallingConvention.Cdecl)]
delegate bool IdleHandlerInternal ();
internal class IdleProxy : SourceProxy {
public IdleProxy (IdleHandler real)
{
real_handler = real;
proxy_handler = new IdleHandlerInternal (Handler);
}
public bool Handler ()
{
try {
IdleHandler idle_handler = (IdleHandler) real_handler;
bool cont = idle_handler ();
if (!cont)
Remove ();
return cont;
} catch (Exception e) {
ExceptionManager.RaiseUnhandledException (e, false);
}
return false;
}
}
private Idle ()
{
}
[DllImport("libglib-2.0-0.dll")]
static extern uint g_idle_add (IdleHandlerInternal d, IntPtr data);
public static uint Add (IdleHandler hndlr)
{
IdleProxy p = new IdleProxy (hndlr);
p.ID = g_idle_add ((IdleHandlerInternal) p.proxy_handler, IntPtr.Zero);
lock (Source.source_handlers)
Source.source_handlers [p.ID] = p;
return p.ID;
}
[DllImport("libglib-2.0-0.dll")]
static extern uint g_idle_add_full (int priority, IdleHandlerInternal d, IntPtr data, DestroyNotify notify);
public static uint Add (IdleHandler hndlr, Priority priority)
{
IdleProxy p = new IdleProxy (hndlr);
p.ID = g_idle_add_full ((int)priority, (IdleHandlerInternal)p.proxy_handler, IntPtr.Zero, null);
lock (Source.source_handlers)
Source.source_handlers [p.ID] = p;
return p.ID;
}
[DllImport("libglib-2.0-0.dll")]
static extern bool g_source_remove_by_funcs_user_data (Delegate d, IntPtr data);
public static void Remove (uint id)
{
Source.Remove (id);
}
public static bool Remove (IdleHandler hndlr)
{
bool result = false;
ArrayList keys = new ArrayList ();
lock (Source.source_handlers) {
foreach (uint code in Source.source_handlers.Keys) {
IdleProxy p = Source.source_handlers [code] as IdleProxy;
if (p != null && p.real_handler == hndlr) {
keys.Add (code);
result = g_source_remove_by_funcs_user_data (p.proxy_handler, IntPtr.Zero);
}
}
foreach (object key in keys)
Source.source_handlers.Remove (key);
}
return result;
}
}
}
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