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Implemented getCPUTicks() and getCPUTicksPerSecond() for Windows.

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This commit is contained in:
Patrick 2025-07-17 10:56:39 +02:00
parent d207774868
commit d3659f11f7
1 changed files with 16 additions and 7 deletions
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23
source/mijin/util/os.cpp
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@ -39,9 +39,9 @@ namespace mijin
// internal variables
//
#if MIJIN_TARGET_OS == MIJIN_OS_LINUX
namespace
{
#if MIJIN_TARGET_OS == MIJIN_OS_LINUX
std::mutex gDlErrorMutex; // dlerror may not be thread-safe
const std::uint64_t gCPUClockResolution = []()
@ -52,8 +52,16 @@ const std::uint64_t gCPUClockResolution = []()
MIJIN_ASSERT(time.tv_sec == 0, "What kind of cpu clock is this?");
return static_cast<std::uint64_t>(time.tv_nsec);
}();
};
#endif // MIJIN_TARGET_OS == MIJIN_OS_LINUX
#elif MIJIN_TARGET_OS == MIJIN_OS_WINDOWS
const std::uint64_t gCPUTickFrequency = []()
{
LARGE_INTEGER ticks;
[[maybe_unused]] const BOOL result = QueryPerformanceFrequency(&ticks);
MIJIN_ASSERT(result, "Error getting cpu frequency.");
return static_cast<std::uint64_t>(ticks.QuadPart);
}();
#endif // MIJIN_TARGET_OS == MIJIN_OS_LINUX || MIJIN_TARGET_OS == MIJIN_OS_WINDOWS
}
//
// internal functions
@ -196,8 +204,10 @@ std::uint64_t getCPUTicks() MIJIN_NOEXCEPT
MIJIN_ASSERT(result == 0, "Error getting cpu time.");
return (static_cast<std::uint64_t>(time.tv_sec) * 1e9 + time.tv_nsec) / gCPUClockResolution;
#else
MIJIN_ERROR("TODO");
return 0;
LARGE_INTEGER ticks;
[[maybe_unused]] const BOOL result = QueryPerformanceCounter(&ticks);
MIJIN_ASSERT(result, "Error getting cpu time.");
return static_cast<std::uint64_t>(ticks.QuadPart);
#endif
}
@ -206,8 +216,7 @@ std::uint64_t getCPUTicksPerSecond() MIJIN_NOEXCEPT
#if MIJIN_TARGET_OS == MIJIN_OS_LINUX
return 1e9 / gCPUClockResolution;
#else
MIJIN_ERROR("TODO");
return 0;
return gCPUTickFrequency;
#endif
}
} // namespace mijin