mirror of
https://github.com/4jcraft/4jcraft.git
synced 2026-05-28 07:42:53 +00:00
39 lines
1.4 KiB
C++
39 lines
1.4 KiB
C++
#pragma once
|
|
|
|
#include <chrono>
|
|
#include <cstdint>
|
|
|
|
// Portable replacements for Win32 time APIs.
|
|
// GetTickCount() → PlatformTime::GetTickCount()
|
|
// QueryPerformanceCounter() → PlatformTime::QueryPerformanceCounter()
|
|
// QueryPerformanceFrequency() → PlatformTime::QueryPerformanceFrequency()
|
|
|
|
namespace PlatformTime {
|
|
|
|
// Returns milliseconds since an unspecified epoch (like Win32 GetTickCount).
|
|
inline std::uint32_t GetTickCount() {
|
|
auto now = std::chrono::steady_clock::now().time_since_epoch();
|
|
return static_cast<std::uint32_t>(
|
|
std::chrono::duration_cast<std::chrono::milliseconds>(now).count());
|
|
}
|
|
|
|
// High-resolution counter value (like Win32 QueryPerformanceCounter).
|
|
// Returns a count in ticks of steady_clock.
|
|
inline std::int64_t QueryPerformanceCounter() {
|
|
return std::chrono::steady_clock::now().time_since_epoch().count();
|
|
}
|
|
|
|
// Ticks per second for the high-resolution counter.
|
|
inline std::int64_t QueryPerformanceFrequency() {
|
|
return static_cast<std::int64_t>(std::chrono::steady_clock::period::den) /
|
|
static_cast<std::int64_t>(std::chrono::steady_clock::period::num);
|
|
}
|
|
|
|
// Elapsed seconds between two counter values.
|
|
inline double ElapsedSeconds(std::int64_t start, std::int64_t end) {
|
|
return static_cast<double>(end - start) /
|
|
static_cast<double>(QueryPerformanceFrequency());
|
|
}
|
|
|
|
} // namespace PlatformTime
|