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[port] windows 7 support (#3105)

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Signed-off-by: lizzie lizzie@eden-emu.dev
Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/3105
Reviewed-by: Caio Oliveira <caiooliveirafarias0@gmail.com>
Reviewed-by: crueter <crueter@eden-emu.dev>
Co-authored-by: lizzie <lizzie@eden-emu.dev>
Co-committed-by: lizzie <lizzie@eden-emu.dev>
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lizzie 2025-11-30 06:04:36 +01:00 • committed by crueter
parent d656e347c8
commit c72144abad
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GPG key ID: 425ACD2D4830EBC6
3 changed files with 32 additions and 20 deletions
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27
src/common/steady_clock.cpp
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@ -1,3 +1,6 @@
// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
// SPDX-License-Identifier: GPL-3.0-or-later
// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
@ -25,15 +28,21 @@ static s64 WindowsQueryPerformanceCounter() {
}
static s64 GetSystemTimeNS() {
// GetSystemTimePreciseAsFileTime returns the file time in 100ns units.
static constexpr s64 Multiplier = 100;
// Convert Windows epoch to Unix epoch.
static constexpr s64 WindowsEpochToUnixEpoch = 0x19DB1DED53E8000LL;
FILETIME filetime;
GetSystemTimePreciseAsFileTime(&filetime);
return Multiplier * ((static_cast<s64>(filetime.dwHighDateTime) << 32) +
static_cast<s64>(filetime.dwLowDateTime) - WindowsEpochToUnixEpoch);
static auto pf = (decltype(&GetSystemTimePreciseAsFileTime))(void*)GetProcAddress(GetModuleHandle(TEXT("Kernel32.dll")), "GetSystemTimePreciseAsFileTime"); // Windows 8+
if (pf) {
// GetSystemTimePreciseAsFileTime returns the file time in 100ns units.
constexpr s64 Multiplier = 100;
// Convert Windows epoch to Unix epoch.
constexpr s64 WindowsEpochToUnixEpoch = 0x19DB1DED53E8000LL;
FILETIME filetime;
pf(&filetime);
return Multiplier * ((s64(filetime.dwHighDateTime) << 32) + s64(filetime.dwLowDateTime) - WindowsEpochToUnixEpoch);
} else {
// Only Windows XP and below error out here
LARGE_INTEGER ticks;
QueryPerformanceCounter(&ticks);
return ticks.QuadPart;
}
}
#endif