15d422d988
New cvar clock_source_raw allows to use the cpu cycle counter itself as an alternative time source, if system timing resolution is to low and causes problems.
42 lines
1.2 KiB
C++
42 lines
1.2 KiB
C++
/**
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******************************************************************************
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* Xenia : Xbox 360 Emulator Research Project *
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******************************************************************************
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* Copyright 2019 Ben Vanik. All rights reserved. *
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* Released under the BSD license - see LICENSE in the root for more details. *
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******************************************************************************
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*/
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#include "xenia/base/clock.h"
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#include "xenia/base/platform_win.h"
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namespace xe {
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uint64_t Clock::host_tick_frequency_platform() {
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LARGE_INTEGER frequency;
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QueryPerformanceFrequency(&frequency);
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return frequency.QuadPart;
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}
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uint64_t Clock::host_tick_count_platform() {
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LARGE_INTEGER counter;
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uint64_t time = 0;
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if (QueryPerformanceCounter(&counter)) {
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time = counter.QuadPart;
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}
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return time;
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}
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uint64_t Clock::QueryHostSystemTime() {
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FILETIME t;
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GetSystemTimeAsFileTime(&t);
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return (uint64_t(t.dwHighDateTime) << 32) | t.dwLowDateTime;
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}
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uint64_t Clock::QueryHostUptimeMillis() {
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return host_tick_count_platform() * 1000 / host_tick_frequency_platform();
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}
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} // namespace xe
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