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[util] Add functions to help convert external times

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This commit is contained in:
Bill Currie 2021-08-27 12:10:05 +09:00
parent 5d4013b485
commit 05215e0295
2 changed files with 24 additions and 10 deletions
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2
include/QF/sys.h
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@ -78,8 +78,10 @@ void Sys_FatalError (const char *error, ...) __attribute__((format(PRINTF,1,2),
void Sys_Quit (void) __attribute__((noreturn));
void Sys_Shutdown (void);
void Sys_RegisterShutdown (void (*func) (void *), void *data);
int64_t Sys_StartTime (void) __attribute__ ((const));
int64_t Sys_LongTime (void);
double Sys_DoubleTime (void);
int64_t Sys_TimeBase (void) __attribute__ ((const));
double Sys_DoubleTimeBase (void) __attribute__ ((const));
void Sys_TimeOfDay(date_t *date);

32
libs/util/sys.c
View file

@ -320,6 +320,14 @@ Sys_MaskPrintf (int mask, const char *fmt, ...)
va_end (args);
}
static int64_t sys_starttime = -1;
VISIBLE int64_t
Sys_StartTime (void)
{
return sys_starttime;
}
VISIBLE int64_t
Sys_LongTime (void)
{
@ -353,11 +361,10 @@ Sys_LongTime (void)
static int64_t qpcfudge = 0;
int64_t currtime = 0;
static int64_t lasttime = 0;
static int64_t starttime = 0;
if (first) {
timeBeginPeriod (1);
starttime = lasttime = timeGetTime ();
sys_starttime = lasttime = timeGetTime () * 1000;
QueryPerformanceFrequency ((LARGE_INTEGER *) &qpcfreq);
QueryPerformanceCounter ((LARGE_INTEGER *) &lastqpccount);
first = false;
@ -365,7 +372,7 @@ Sys_LongTime (void)
}
// get the current time from both counters
currtime = timeGetTime ();
currtime = timeGetTime () * 1000;
QueryPerformanceCounter ((LARGE_INTEGER *) &currqpccount);
if (currtime != lasttime) {
@ -376,7 +383,7 @@ Sys_LongTime (void)
// store back times and calc a fudge factor as timeGetTime can
// overshoot on a sub-millisecond scale
qpcfudge = (( (currqpccount - lastqpccount) * 1000000 / qpcfreq))
- ((currtime - lasttime) * 1000);
- (currtime - lasttime);
lastqpccount = currqpccount;
lasttime = currtime;
} else {
@ -384,12 +391,11 @@ Sys_LongTime (void)
}
// the final time is the base from timeGetTime plus an addition from QPC
return (((currtime - starttime) * 1000)
return ((currtime - sys_starttime)
+ ((currqpccount - lastqpccount) * 1000000 / qpcfreq) + qpcfudge);
# endif
#else
int64_t now;
static int64_t start_time;
#ifdef CLOCK_BOOTTIME
struct timespec tp;
@ -407,23 +413,29 @@ Sys_LongTime (void)
if (first) {
first = false;
start_time = now;
sys_starttime = now;
}
return now - start_time;
return now - sys_starttime;
#endif
}
VISIBLE int64_t
Sys_TimeBase (void)
{
return __INT64_C (4294967296000000);
}
VISIBLE double
Sys_DoubleTime (void)
{
return (__INT64_C (4294967296000000) + Sys_LongTime ()) / 1e6;
return (Sys_TimeBase () + Sys_LongTime ()) / 1e6;
}
VISIBLE double
Sys_DoubleTimeBase (void)
{
return __INT64_C (4294967296000000) / 1e6;
return Sys_TimeBase () / 1e6;
}
VISIBLE void