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