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28 lines
787 B
Plaintext
28 lines
787 B
Plaintext
module std::time::os @if(env::WIN32);
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import std::os::win32;
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import std::math;
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const ulong WINDOWS_TICK_US @local = 10;
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const ulong WIN_TO_UNIX_EPOCH_US @local = 116444736000000000u64 / WINDOWS_TICK_US;
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fn Clock native_clock()
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{
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static Win32_LARGE_INTEGER freq;
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static ulong div = 0;
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ulong mult = 0;
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if (!freq.quadPart)
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{
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if (!win32::queryPerformanceFrequency(&freq)) return 0;
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}
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Win32_LARGE_INTEGER counter @noinit;
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if (!win32::queryPerformanceCounter(&counter)) return 0;
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return (Clock)counter.quadPart.muldiv(1_000_000_000, freq.quadPart);
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}
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fn Time native_timestamp()
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{
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Win32_FILETIME ft @noinit;
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win32::getSystemTimeAsFileTime(&ft);
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ulong result = (ulong)ft.dwHighDateTime << 32 | ft.dwLowDateTime;
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return (Time)(result / WINDOWS_TICK_US - WIN_TO_UNIX_EPOCH_US);
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} |