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/*
* Copyright (C) 2006 Apple Computer, Inc. All rights reserved.
* Copyright (C) 2007-2008 Torch Mobile, Inc.
*
* 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 "SharedTimer.h"
#include "Page.h"
#include "SystemTime.h"
#include "WebCoreInstanceHandle.h"
#include "Widget.h"
#include <wtf/Assertions.h>
#include <wtf/CurrentTime.h>
#include <windows.h>
namespace JSC {
JS_EXPORTDATA extern void* g_stackBase;
}
namespace WebCore {
enum {
TimerIdNone = 0,
TimerIdAuto,
TimerIdManual,
};
static UINT timerID = TimerIdNone;
static void (*sharedTimerFiredFunction)();
static HWND timerWindowHandle = 0;
const LPCWSTR kTimerWindowClassName = L"TimerWindowClass";
LRESULT CALLBACK TimerWindowWndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
int dummy;
JSC::g_stackBase = &dummy;
if (message == WM_TIMER) {
if (timerID != TimerIdNone)
sharedTimerFiredFunction();
} else if (message == WM_USER) {
if (timerID = TimerIdManual) {
sharedTimerFiredFunction();
PostMessage(hWnd, WM_USER, 0, 0);
}
} else {
JSC::g_stackBase = 0;
return DefWindowProc(hWnd, message, wParam, lParam);
}
JSC::g_stackBase = 0;
return 0;
}
static void initializeOffScreenTimerWindow()
{
if (timerWindowHandle)
return;
WNDCLASS wcex = {0};
wcex.lpfnWndProc = TimerWindowWndProc;
wcex.hInstance = WebCore::instanceHandle();
wcex.lpszClassName = kTimerWindowClassName;
RegisterClass(&wcex);
timerWindowHandle = CreateWindow(kTimerWindowClassName, 0, 0,
CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, 0, 0, WebCore::instanceHandle(), 0);
}
void setSharedTimerFiredFunction(void (*f)())
{
sharedTimerFiredFunction = f;
}
#define USER_TIMER_MAXIMUM 0x7FFFFFFF
#define USER_TIMER_MINIMUM 0x0000000A
void setSharedTimerFireTime(double fireTime)
{
ASSERT(sharedTimerFiredFunction);
double interval = (fireTime - currentTime()) * 1000.;
unsigned intervalInMS = interval < USER_TIMER_MINIMUM
? USER_TIMER_MINIMUM
: interval > USER_TIMER_MAXIMUM
? USER_TIMER_MAXIMUM
: static_cast<unsigned>(interval);
if (timerID == TimerIdAuto) {
KillTimer(timerWindowHandle, TimerIdAuto);
timerID = TimerIdNone;
}
initializeOffScreenTimerWindow();
if (SetTimer(timerWindowHandle, TimerIdAuto, intervalInMS, 0))
timerID = TimerIdAuto;
else if (timerID != TimerIdManual)
PostMessage(timerWindowHandle, WM_USER, 0, 0);
}
void stopSharedTimer()
{
if (timerID == TimerIdAuto)
KillTimer(timerWindowHandle, TimerIdAuto);
timerID = TimerIdNone;
}
}
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