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Implement high-resolution clock for mingw64 in test_ctl

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lazymio 2021-11-23 14:15:18 +01:00
parent ccfb66611f
commit e11cc16e54
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1 changed files with 36 additions and 20 deletions
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56
tests/unit/test_ctl.c
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@ -7,29 +7,45 @@
#include "windows.h"
#define NANOSECONDS_PER_SECOND 1000000000LL
static inline uint64_t muldiv64(uint64_t a, uint32_t b, uint32_t c)
{
union {
uint64_t ll;
struct {
uint32_t low, high;
} l;
} u, res;
uint64_t rl, rh;
u.ll = a;
rl = (uint64_t)u.l.low * (uint64_t)b;
rh = (uint64_t)u.l.high * (uint64_t)b;
rh += (rl >> 32);
res.l.high = rh / c;
res.l.low = (((rh % c) << 32) + (rl & 0xffffffff)) / c;
return res.ll;
}
static int64_t get_freq(void)
{
LARGE_INTEGER freq;
int ret = QueryPerformanceFrequency(&freq);
if (ret == 0) {
fprintf(stderr, "Could not calibrate ticks\n");
exit(1);
}
return freq.QuadPart;
}
static inline int64_t get_clock_realtime(void)
{
// code from
// https://stackoverflow.com/questions/10905892/equivalent-of-gettimeday-for-windows
// >>>>>>>>>
const uint64_t EPOCH = ((uint64_t)116444736000000000ULL);
long tv_sec, tv_usec;
SYSTEMTIME system_time;
FILETIME file_time;
uint64_t time;
GetSystemTime(&system_time);
SystemTimeToFileTime(&system_time, &file_time);
time = ((uint64_t)file_time.dwLowDateTime);
time += ((uint64_t)file_time.dwHighDateTime) << 32;
tv_sec = (long)((time - EPOCH) / 10000000L);
tv_usec = (long)(system_time.wMilliseconds * 1000);
// <<<<<<<<<
return tv_sec * 1000000000LL + (tv_usec * 1000);
LARGE_INTEGER ti;
QueryPerformanceCounter(&ti);
return muldiv64(ti.QuadPart, NANOSECONDS_PER_SECOND, get_freq());
}
#else
#include <sys/time.h>