scottk/UltraGrid
1
0
Fork 0
mirror of https://github.com/outbackdingo/UltraGrid.git synced 2026-03-21 18:40:16 +00:00
Code Issues Packages Projects Releases Wiki Activity

gettimeofday win32 compat: use timespec_get

Browse Source
This commit is contained in:
Martin Pulec
2022-03-17 09:50:33 +01:00
parent 4f84c59d59
commit 90686125c9
1 changed files with 4 additions and 53 deletions
Download Patch File Download Diff File Expand all files Collapse all files

57
src/compat/gettimeofday.c
View File

@@ -7,68 +7,19 @@
#ifdef WIN32
#include <assert.h>
#include <limits.h>
#include <time.h>
#include <windows.h>
#include <winbase.h>
#include "debug.h"
#include "gettimeofday.h"
static LARGE_INTEGER start_LI;
LARGE_INTEGER freq = {.QuadPart = 0};
static time_t start_time;
static void gettimeofday_init();
static void gettimeofday_init() {
time_t tmp;
HANDLE process;
DWORD prio;
process = GetCurrentProcess();
prio = GetPriorityClass(process);
int ret = SetPriorityClass(process, REALTIME_PRIORITY_CLASS);
if(!ret) {
fprintf(stderr, "SetPriorityClass failed.\n");
}
tmp = time(NULL);
while( (start_time = time(NULL)) == tmp)
;
QueryPerformanceFrequency(&freq);
QueryPerformanceCounter(&start_LI);
SetPriorityClass(process, prio);
assert((freq.QuadPart - 1) <= LLONG_MAX / 1000000LL); // check possible overflow for tv_usec computation below
}
#if defined(_MSC_VER) || defined(_MSC_EXTENSIONS)
#define DELTA_EPOCH_IN_MICROSECS 11644473600000000Ui64
#else
#define DELTA_EPOCH_IN_MICROSECS 11644473600000000ULL
#endif
// Definition of a gettimeofday function
int gettimeofday_replacement(struct timeval *tv, void *tz)
{
UNUSED(tz);
LARGE_INTEGER val;
struct timespec ts;
timespec_get(&ts, TIME_UTC);
if(freq.QuadPart == 0) {
gettimeofday_init();
}
QueryPerformanceFrequency(&freq);
QueryPerformanceCounter(&val);
long long int difference = val.QuadPart - start_LI.QuadPart;
tv->tv_sec = start_time + difference / freq.QuadPart;
tv->tv_usec = (difference % freq.QuadPart) * 1000000LL / freq.QuadPart;
tv->tv_sec = ts.tv_sec;
tv->tv_usec = ts.tv_nsec / 1000;
return 0;
}