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windows: resync the VM time when the system clock gets changed #588

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merged 3 commits into from
Sep 8, 2021
Merged

windows: resync the VM time when the system clock gets changed #588

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57260c2
windows: resync the VM time when the system clock gets changed
LinqLover Aug 30, 2021
26dda2d
only resync system time for relevant windows versions
LinqLover Aug 30, 2021
cd8c50d
Resolve fallthrough
LinqLover Sep 7, 2021
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11 changes: 11 additions & 0 deletions platforms/win32/vm/sqWin32Heartbeat.c
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Original file line number Diff line number Diff line change
Expand Up @@ -260,6 +260,17 @@ ioInitTime(void)
utcStartMicroseconds = utcMicrosecondClock;
}

void resyncSystemTime() {
#if (_WIN32_WINNT >= _WIN32_WINNT_WIN8)
// Nothing to be done, time will be resynced upon every heartbeat tick
#else // (_WIN32_WINNT >= _WIN32_WINNT_WIN8)
// By setting these values to maximum, currentUTCMicroseconds() will resync to the system time.
lastTick = (DWORD)-1;
vmThreadLastTick = (DWORD)-1;
#endif
ioUpdateVMTimezone();
}

unsigned long long
ioUTCMicroseconds() { return get64(utcMicrosecondClock); }

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4 changes: 4 additions & 0 deletions platforms/win32/vm/sqWin32Window.c
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Expand Up @@ -625,6 +625,10 @@ MainWndProcW(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
case WM_KILLFOCUS:
fHasFocus = 0;
return DefWindowProcW(hwnd,message,wParam,lParam);

case WM_TIMECHANGE:
resyncSystemTime();

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default:
/* Unprocessed messages may be processed outside the current
module. If firstMessageHook is non-NULL and returns a non
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