Back to index

lightning-sunbird  0.9+nobinonly
nsSwitchToUIThread.h
Go to the documentation of this file.
00001 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
00002 /* ***** BEGIN LICENSE BLOCK *****
00003  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
00004  *
00005  * The contents of this file are subject to the Mozilla Public License Version
00006  * 1.1 (the "License"); you may not use this file except in compliance with
00007  * the License. You may obtain a copy of the License at
00008  * http://www.mozilla.org/MPL/
00009  *
00010  * Software distributed under the License is distributed on an "AS IS" basis,
00011  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
00012  * for the specific language governing rights and limitations under the
00013  * License.
00014  *
00015  * The Original Code is mozilla.org code.
00016  *
00017  * The Initial Developer of the Original Code is
00018  * Netscape Communications Corporation.
00019  * Portions created by the Initial Developer are Copyright (C) 1998
00020  * the Initial Developer. All Rights Reserved.
00021  *
00022  * Contributor(s):
00023  *
00024  * Alternatively, the contents of this file may be used under the terms of
00025  * either the GNU General Public License Version 2 or later (the "GPL"), or
00026  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
00027  * in which case the provisions of the GPL or the LGPL are applicable instead
00028  * of those above. If you wish to allow use of your version of this file only
00029  * under the terms of either the GPL or the LGPL, and not to allow others to
00030  * use your version of this file under the terms of the MPL, indicate your
00031  * decision by deleting the provisions above and replace them with the notice
00032  * and other provisions required by the GPL or the LGPL. If you do not delete
00033  * the provisions above, a recipient may use your version of this file under
00034  * the terms of any one of the MPL, the GPL or the LGPL.
00035  *
00036  * ***** END LICENSE BLOCK ***** */
00037 
00038 #ifndef SWITCHTOUITHREAD_H
00039 #define SWITCHTOUITHREAD_H
00040 
00041 
00042 // foreward declaration
00043 struct MethodInfo;
00044 
00049 class nsSwitchToUIThread {
00050 
00051 public:
00052     virtual BOOL CallMethod(MethodInfo *info) = 0;
00053 
00054 };
00055 
00056 //
00057 // Structure used for passing the information necessary for synchronously 
00058 // invoking a method on the GUI thread...
00059 //
00060 struct MethodInfo {
00061     nsSwitchToUIThread* target;
00062     UINT        methodId;
00063     int         nArgs;
00064     ULONG*      args;
00065 
00066     MethodInfo(nsSwitchToUIThread *obj, UINT id, int numArgs=0, ULONG *arguments = 0) {
00067         target   = obj;
00068         methodId = id;
00069         nArgs    = numArgs;
00070         args     = arguments;
00071     }
00072     
00073     BOOL Invoke() { return target->CallMethod(this); }
00074 };
00075 
00076 #endif // TOUITHRD_H
00077