_GetStdHandle,
_GetSystemDirectoryA,
_GetSystemInfo,
- _GetSystemTimeAsFileTime,
_GetThreadContext,
_SetThreadContext,
_LoadLibraryExW,
_LoadLibraryW,
_PostQueuedCompletionStatus,
_QueryPerformanceCounter,
- _QueryPerformanceFrequency,
_RaiseFailFastException,
_ResumeThread,
_SetConsoleCtrlHandler,
if _WSAGetOverlappedResult == nil {
throw("WSAGetOverlappedResult not found")
}
-
- if windowsFindfunc(n32, []byte("wine_get_version\000")) != nil {
- // running on Wine
- initWine(k32)
- }
}
func monitorSuspendResume() {
stdcall2(_SetProcessPriorityBoost, currentProcess, 1)
}
-// useQPCTime controls whether time.now and nanotime use QueryPerformanceCounter.
-// This is only set to 1 when running under Wine.
-var useQPCTime uint8
-
-var qpcStartCounter int64
-var qpcMultiplier int64
-
-//go:nosplit
-func nanotimeQPC() int64 {
- var counter int64 = 0
- stdcall1(_QueryPerformanceCounter, uintptr(unsafe.Pointer(&counter)))
-
- // returns number of nanoseconds
- return (counter - qpcStartCounter) * qpcMultiplier
-}
-
-//go:nosplit
-func nowQPC() (sec int64, nsec int32, mono int64) {
- var ft int64
- stdcall1(_GetSystemTimeAsFileTime, uintptr(unsafe.Pointer(&ft)))
-
- t := (ft - 116444736000000000) * 100
-
- sec = t / 1000000000
- nsec = int32(t - sec*1000000000)
-
- mono = nanotimeQPC()
- return
-}
-
-func initWine(k32 uintptr) {
- _GetSystemTimeAsFileTime = windowsFindfunc(k32, []byte("GetSystemTimeAsFileTime\000"))
- if _GetSystemTimeAsFileTime == nil {
- throw("could not find GetSystemTimeAsFileTime() syscall")
- }
-
- _QueryPerformanceCounter = windowsFindfunc(k32, []byte("QueryPerformanceCounter\000"))
- _QueryPerformanceFrequency = windowsFindfunc(k32, []byte("QueryPerformanceFrequency\000"))
- if _QueryPerformanceCounter == nil || _QueryPerformanceFrequency == nil {
- throw("could not find QPC syscalls")
- }
-
- // We can not simply fallback to GetSystemTimeAsFileTime() syscall, since its time is not monotonic,
- // instead we use QueryPerformanceCounter family of syscalls to implement monotonic timer
- // https://msdn.microsoft.com/en-us/library/windows/desktop/dn553408(v=vs.85).aspx
-
- var tmp int64
- stdcall1(_QueryPerformanceFrequency, uintptr(unsafe.Pointer(&tmp)))
- if tmp == 0 {
- throw("QueryPerformanceFrequency syscall returned zero, running on unsupported hardware")
- }
-
- // This should not overflow, it is a number of ticks of the performance counter per second,
- // its resolution is at most 10 per usecond (on Wine, even smaller on real hardware), so it will be at most 10 millions here,
- // panic if overflows.
- if tmp > (1<<31 - 1) {
- throw("QueryPerformanceFrequency overflow 32 bit divider, check nosplit discussion to proceed")
- }
- qpcFrequency := int32(tmp)
- stdcall1(_QueryPerformanceCounter, uintptr(unsafe.Pointer(&qpcStartCounter)))
-
- // Since we are supposed to run this time calls only on Wine, it does not lose precision,
- // since Wine's timer is kind of emulated at 10 Mhz, so it will be a nice round multiplier of 100
- // but for general purpose system (like 3.3 Mhz timer on i7) it will not be very precise.
- // We have to do it this way (or similar), since multiplying QPC counter by 100 millions overflows
- // int64 and resulted time will always be invalid.
- qpcMultiplier = int64(timediv(1000000000, qpcFrequency, nil))
-
- useQPCTime = 1
-}
-
//go:nosplit
func getRandomData(r []byte) {
n := 0