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// Copyright Epic Games, Inc. All Rights Reserved.
#include <doctest/doctest.h>
#include <zencore/thread.h>
#include <zencore/timer.h>
#if ZEN_PLATFORM_WINDOWS
# include <zencore/windows.h>
#elif ZEN_PLATFORM_LINUX
# include <time.h>
# include <unistd.h>
#endif
namespace zen {
uint64_t
GetHifreqTimerValue()
{
#if ZEN_PLATFORM_WINDOWS
LARGE_INTEGER li;
QueryPerformanceCounter(&li);
return li.QuadPart;
#else
struct timespec ts;
clock_gettime(CLOCK_MONOTONIC, &ts);
return (uint64_t(ts.tv_sec) * 1000000ull) + (uint64_t(ts.tv_nsec) / 1000ull);
#endif
}
uint64_t
internalGetHifreqTimerFrequency()
{
#if ZEN_PLATFORM_WINDOWS
LARGE_INTEGER li;
QueryPerformanceFrequency(&li);
return li.QuadPart;
#else
return 1000000ull;
#endif
}
static uint64_t qpcFreq = internalGetHifreqTimerFrequency();
uint64_t
GetHifreqTimerFrequency()
{
return qpcFreq;
}
uint64_t
GetHifreqTimerFrequencySafe()
{
if (!qpcFreq)
qpcFreq = internalGetHifreqTimerFrequency();
return qpcFreq;
}
//////////////////////////////////////////////////////////////////////////
#if !ZEN_PLATFORM_WINDOWS
void Sleep(uint32_t ms)
{
usleep(ms * 1000U);
}
#endif
//////////////////////////////////////////////////////////////////////////
//
// Testing related code follows...
//
void
timer_forcelink()
{
}
TEST_CASE("Timer")
{
uint64_t s0 = GetHifreqTimerValue();
uint64_t t0 = GetCpuTimerValue();
Sleep(1000);
uint64_t s1 = GetHifreqTimerValue();
uint64_t t1 = GetCpuTimerValue();
// double r = double(t1 - t0) / (s1 - s0);
CHECK_NE(t0, t1);
CHECK_NE(s0, s1);
}
} // namespace zen
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