ab21e1e0f0
Fully defined the structure. Single copy of it + single timer across all modules, managing it is now the responsibility of KernelState. add global_critical_region::PrepareToAcquire, which uses Prefetchw on the global crit. We now know we can use Prefetchw on all cpus that have AVX. add KeQueryInterruptTime, which is used by some dashboards. add threading::NanoSleep
57 lines
1.8 KiB
C++
57 lines
1.8 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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#if XE_USE_KUSER_SHARED == 1
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uint64_t Clock::host_tick_frequency_platform() { return 10000000ULL; }
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uint64_t Clock::host_tick_count_platform() {
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return *reinterpret_cast<volatile uint64_t*>(GetKUserSharedSystemTime());
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}
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uint64_t Clock::QueryHostSystemTime() {
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return *reinterpret_cast<volatile uint64_t*>(GetKUserSharedSystemTime());
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}
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#else
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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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#endif
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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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// todo: we only take the low part of interrupttime! this is actually a 96-bit
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// int!
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uint64_t Clock::QueryHostInterruptTime() {
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return *reinterpret_cast<uint64_t*>(KUserShared() +
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KUSER_SHARED_INTERRUPTTIME_OFFSET);
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}
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} // namespace xe
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