109 lines
2.4 KiB
C#
109 lines
2.4 KiB
C#
// ThreadNotify.cs: implements a notification for the thread running the Gtk main
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// loop from another thread
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//
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// Authors:
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// Miguel de Icaza (miguel@ximian.com).
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// Gonzalo Paniagua Javier (gonzalo@ximian.com)
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//
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// Copyright (c) 2002 Ximian, Inc.
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// Copyright (c) 2004 Novell, Inc.
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of version 2 of the Lesser GNU General
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// Public License as published by the Free Software Foundation.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this program; if not, write to the
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// Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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// Boston, MA 02111-1307, USA.
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namespace Gtk {
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using System.Runtime.InteropServices;
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using System.Threading;
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using System;
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// <summary>
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// This delegate will be invoked on the main Gtk thread.
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// </summary>
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public delegate void ReadyEvent ();
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/// <summary>
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/// Utility class to help writting multi-threaded Gtk applications
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/// </summary>
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/// <remarks/>
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///
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public class ThreadNotify : IDisposable {
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bool disposed;
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ReadyEvent re;
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GLib.IdleHandler idle;
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bool notified;
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/// <summary>
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/// The ReadyEvent delegate will be invoked on the current thread (which should
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/// be the Gtk thread) when another thread wakes us up by calling WakeupMain
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/// </summary>
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public ThreadNotify (ReadyEvent re)
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{
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this.re = re;
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idle = new GLib.IdleHandler (CallbackWrapper);
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}
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bool CallbackWrapper ()
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{
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lock (this) {
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if (disposed)
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return false;
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notified = false;
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}
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re ();
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return false;
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}
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/// <summary>
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/// Invoke this function from a thread to call the `ReadyEvent'
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/// delegate provided in the constructor on the Main Gtk thread
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/// </summary>
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public void WakeupMain ()
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{
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lock (this){
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if (notified)
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return;
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notified = true;
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GLib.Idle.Add (idle);
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}
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}
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public void Close ()
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{
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Dispose (true);
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GC.SuppressFinalize (this);
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}
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~ThreadNotify ()
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{
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Dispose (false);
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}
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void IDisposable.Dispose ()
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{
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Close ();
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}
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protected virtual void Dispose (bool disposing)
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{
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lock (this) {
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disposed = true;
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}
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}
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}
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}
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