1/*
2 * Copyright (C) 2007, 2008 Apple Inc. All rights reserved.
3 * Copyright (C) 2009 Torch Mobile Inc. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * 1.  Redistributions of source code must retain the above copyright
10 *     notice, this list of conditions and the following disclaimer.
11 * 2.  Redistributions in binary form must reproduce the above copyright
12 *     notice, this list of conditions and the following disclaimer in the
13 *     documentation and/or other materials provided with the distribution.
14 * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
15 *     its contributors may be used to endorse or promote products derived
16 *     from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
19 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
20 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
21 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
22 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
23 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
24 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
25 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
30#include "config.h"
31#include "MainThread.h"
32
33#include "Assertions.h"
34#include "Threading.h"
35#if !OS(WINCE)
36#include <windows.h>
37#endif
38
39namespace WTF {
40
41static HWND threadingWindowHandle;
42static UINT threadingFiredMessage;
43const LPCWSTR kThreadingWindowClassName = L"ThreadingWindowClass";
44
45LRESULT CALLBACK ThreadingWindowWndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
46{
47    if (message == threadingFiredMessage)
48        dispatchFunctionsFromMainThread();
49    else
50        return DefWindowProc(hWnd, message, wParam, lParam);
51    return 0;
52}
53
54void initializeMainThreadPlatform()
55{
56    if (threadingWindowHandle)
57        return;
58
59    HWND hWndParent = 0;
60#if OS(WINCE)
61    WNDCLASS wcex;
62    memset(&wcex, 0, sizeof(WNDCLASS));
63#else
64    WNDCLASSEX wcex;
65    memset(&wcex, 0, sizeof(WNDCLASSEX));
66    wcex.cbSize = sizeof(WNDCLASSEX);
67#endif
68    wcex.lpfnWndProc    = ThreadingWindowWndProc;
69    wcex.lpszClassName  = kThreadingWindowClassName;
70#if OS(WINCE)
71    RegisterClass(&wcex);
72#else
73    RegisterClassEx(&wcex);
74    hWndParent = HWND_MESSAGE;
75#endif
76
77    threadingWindowHandle = CreateWindow(kThreadingWindowClassName, 0, 0,
78       CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, hWndParent, 0, 0, 0);
79    threadingFiredMessage = RegisterWindowMessage(L"com.apple.WebKit.MainThreadFired");
80
81    initializeCurrentThreadInternal("Main Thread");
82}
83
84void scheduleDispatchFunctionsOnMainThread()
85{
86    ASSERT(threadingWindowHandle);
87    PostMessage(threadingWindowHandle, threadingFiredMessage, 0, 0);
88}
89
90} // namespace WTF
91