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/*
* Copyright (C) 2006, 2007, 2009 Apple Computer, Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include <windows.h>
#include "QTMovieWinTimer.h"
#include <wtf/Assertions.h>
// This file is used by the QuickTime access DLL. It copies some WebCore code
// which can't be used directly due to dependency issues.
// FIXME: Find a way to do timers that can manage <10ms resolution properly too.
static UINT_PTR timerID;
static void (*sharedTimerFiredFunction)();
static HINSTANCE instanceHandle = 0;
static HWND timerWindowHandle = 0;
static UINT timerFiredMessage = 0;
static const LPCWSTR kTimerWindowClassName = L"TimerWindowClass";
static bool processingCustomTimerMessage = false;
static LRESULT CALLBACK TimerWindowWndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
if (message == timerFiredMessage) {
processingCustomTimerMessage = true;
sharedTimerFiredFunction();
processingCustomTimerMessage = false;
} else if (message == WM_TIMER && wParam == timerID) {
stopSharedTimer();
sharedTimerFiredFunction();
} else
return DefWindowProc(hWnd, message, wParam, lParam);
return 0;
}
static void initializeOffScreenTimerWindow()
{
if (timerWindowHandle)
return;
WNDCLASSEX wcex;
memset(&wcex, 0, sizeof(WNDCLASSEX));
wcex.cbSize = sizeof(WNDCLASSEX);
wcex.lpfnWndProc = TimerWindowWndProc;
wcex.hInstance = instanceHandle;
wcex.lpszClassName = kTimerWindowClassName;
RegisterClassEx(&wcex);
timerWindowHandle = CreateWindow(kTimerWindowClassName, 0, 0,
CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, HWND_MESSAGE, 0, instanceHandle, 0);
timerFiredMessage = RegisterWindowMessage(L"com.apple.WebKit.TimerFired");
}
void setSharedTimerFiredFunction(void (*f)())
{
sharedTimerFiredFunction = f;
}
void setSharedTimerFireDelay(double interval)
{
ASSERT(sharedTimerFiredFunction);
unsigned intervalInMS;
if (interval < 0)
intervalInMS = 0;
else {
interval *= 1000;
if (interval > USER_TIMER_MAXIMUM)
intervalInMS = USER_TIMER_MAXIMUM;
else
intervalInMS = (unsigned)interval;
}
stopSharedTimer();
initializeOffScreenTimerWindow();
// We don't allow nested PostMessages, since the custom messages will effectively starve
// painting and user input. (Win32 has a tri-level queue with application messages >
// user input > WM_PAINT/WM_TIMER.)
// In addition, if the queue contains input events that have been there since the last call to
// GetQueueStatus, PeekMessage or GetMessage we favor timers.
if (intervalInMS < USER_TIMER_MINIMUM
&& !processingCustomTimerMessage
&& !LOWORD(::GetQueueStatus(QS_ALLINPUT))) {
// Windows SetTimer does not allow timeouts smaller than 10ms (USER_TIMER_MINIMUM)
PostMessage(timerWindowHandle, timerFiredMessage, 0, 0);
} else
timerID = SetTimer(timerWindowHandle, timerFiredMessage, intervalInMS, 0);
}
void stopSharedTimer()
{
if (timerID) {
KillTimer(timerWindowHandle, timerID);
timerID = 0;
}
}
void setSharedTimerInstanceHandle(HINSTANCE handle)
{
instanceHandle = handle;
}
double systemTime()
{
FILETIME ft;
GetSystemTimeAsFileTime(&ft);
ULARGE_INTEGER t;
memcpy(&t, &ft, sizeof(t));
return t.QuadPart * 0.0000001 - 11644473600.0;
}
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