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 !PLATFORM(WINCE)
36 #include <windows.h>
37 #endif
38
39 namespace WTF {
40
41 static HWND threadingWindowHandle;
42 static UINT threadingFiredMessage;
43 const LPCWSTR kThreadingWindowClassName = L"ThreadingWindowClass";
44
ThreadingWindowWndProc(HWND hWnd,UINT message,WPARAM wParam,LPARAM lParam)45 LRESULT 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
initializeMainThreadPlatform()54 void initializeMainThreadPlatform()
55 {
56 if (threadingWindowHandle)
57 return;
58
59 #if PLATFORM(WINCE)
60 WNDCLASS wcex;
61 memset(&wcex, 0, sizeof(WNDCLASS));
62 #else
63 WNDCLASSEX wcex;
64 memset(&wcex, 0, sizeof(WNDCLASSEX));
65 wcex.cbSize = sizeof(WNDCLASSEX);
66 #endif
67 wcex.lpfnWndProc = ThreadingWindowWndProc;
68 wcex.lpszClassName = kThreadingWindowClassName;
69 #if PLATFORM(WINCE)
70 RegisterClass(&wcex);
71 #else
72 RegisterClassEx(&wcex);
73 #endif
74
75 threadingWindowHandle = CreateWindow(kThreadingWindowClassName, 0, 0,
76 CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, HWND_MESSAGE, 0, 0, 0);
77 threadingFiredMessage = RegisterWindowMessage(L"com.apple.WebKit.MainThreadFired");
78 }
79
scheduleDispatchFunctionsOnMainThread()80 void scheduleDispatchFunctionsOnMainThread()
81 {
82 ASSERT(threadingWindowHandle);
83 PostMessage(threadingWindowHandle, threadingFiredMessage, 0, 0);
84 }
85
86 } // namespace WTF
87