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ee31bfcec5
Replaces platform-specific APIs across 21 files with std::chrono, std::fstream, std::filesystem, and std::this_thread. Adds PlatformTime.h utility header wrapping std::chrono::steady_clock for GetTickCount/QueryPerformanceCounter patterns.
39 lines
1.4 KiB
C++
39 lines
1.4 KiB
C++
#pragma once
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#include <chrono>
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#include <cstdint>
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// Portable replacements for Win32 time APIs.
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// GetTickCount() → PlatformTime::GetTickCount()
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// QueryPerformanceCounter() → PlatformTime::QueryPerformanceCounter()
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// QueryPerformanceFrequency() → PlatformTime::QueryPerformanceFrequency()
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namespace PlatformTime {
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// Returns milliseconds since an unspecified epoch (like Win32 GetTickCount).
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inline std::uint32_t GetTickCount() {
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auto now = std::chrono::steady_clock::now().time_since_epoch();
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return static_cast<std::uint32_t>(
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std::chrono::duration_cast<std::chrono::milliseconds>(now).count());
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}
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// High-resolution counter value (like Win32 QueryPerformanceCounter).
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// Returns a count in ticks of steady_clock.
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inline std::int64_t QueryPerformanceCounter() {
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return std::chrono::steady_clock::now().time_since_epoch().count();
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}
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// Ticks per second for the high-resolution counter.
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inline std::int64_t QueryPerformanceFrequency() {
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return static_cast<std::int64_t>(std::chrono::steady_clock::period::den)
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/ static_cast<std::int64_t>(std::chrono::steady_clock::period::num);
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}
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// Elapsed seconds between two counter values.
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inline double ElapsedSeconds(std::int64_t start, std::int64_t end) {
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return static_cast<double>(end - start)
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/ static_cast<double>(QueryPerformanceFrequency());
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}
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} // namespace PlatformTime
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