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[MINOR] time.h: added a few tv_* functions to manipulate timevals

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A few more tv_* functions will be needed to switch from a millisecond-based
scheduler to a struct timeval-based one.
This commit is contained in:
Willy Tarreau 2007-05-12 22:29:44 +02:00
parent 119680bc5e
commit 49fa3a1453
1 changed files with 101 additions and 1 deletions
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102
include/common/time.h
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@ -105,13 +105,40 @@ REGPRM1 static inline struct timeval *tv_zero(struct timeval *tv) {
*/
#define tv_iseternity(tv) ((tv)->tv_usec == TV_ETERNITY)
/*
* returns 0 if tv is [eternity], otherwise non-zero.
*/
#define tv_isset(tv) ((tv)->tv_usec != TV_ETERNITY)
/*
* returns non null if tv is [0], otherwise 0.
*/
#define tv_iszero(tv) (((tv)->tv_sec | (tv)->tv_usec) == 0)
/*
* Converts a struct timeval to a number of milliseconds.
*/
REGPRM1 static inline unsigned long __tv_to_ms(const struct timeval *tv)
{
unsigned long ret;
/**** comparision functions and macros ***********************************/
ret = tv->tv_sec * 1000;
ret += tv->tv_usec / 1000;
return ret;
}
/*
* Converts a struct timeval to a number of milliseconds.
*/
REGPRM2 static inline struct timeval * __tv_from_ms(struct timeval *tv, unsigned long ms)
{
tv->tv_sec = ms / 1000;
tv->tv_usec = (ms % 1000) * 1000;
return tv;
}
/**** comparison functions and macros ***********************************/
/* tv_cmp: compares <tv1> and <tv2> : returns 0 if equal, -1 if tv1 < tv2, 1 if tv1 > tv2. */
@ -298,6 +325,79 @@ REGPRM2 static inline unsigned long __tv_ms_remain2(const struct timeval *tv1, c
return tv_ms_remain(tv1, tv2);
}
/*
* adds <inc> to <from>, set the result to <tv> and returns a pointer <tv>
*/
#define tv_add __tv_add
REGPRM3 struct timeval *_tv_add(struct timeval *tv, const struct timeval *from, const struct timeval *inc);
REGPRM3 static inline struct timeval *__tv_add(struct timeval *tv, const struct timeval *from, const struct timeval *inc)
{
tv->tv_usec = from->tv_usec + inc->tv_usec;
tv->tv_sec = from->tv_sec + inc->tv_sec;
if (tv->tv_usec >= 1000000) {
tv->tv_usec -= 1000000;
tv->tv_sec++;
}
return tv;
}
/*
* adds <inc> to <tv> and returns a pointer <tv>
*/
REGPRM2 static inline struct timeval *__tv_add2(struct timeval *tv, const struct timeval *inc)
{
tv->tv_usec += inc->tv_usec;
tv->tv_sec += inc->tv_sec;
if (tv->tv_usec >= 1000000) {
tv->tv_usec -= 1000000;
tv->tv_sec++;
}
return tv;
}
/*
* Computes the remaining time between tv1=now and event=tv2. if tv2 is passed,
* 0 is returned. The result is stored into tv.
*/
#define tv_remain _tv_remain
REGPRM3 struct timeval *_tv_remain(const struct timeval *tv1, const struct timeval *tv2, struct timeval *tv);
REGPRM3 static inline struct timeval *__tv_remain(const struct timeval *tv1, const struct timeval *tv2, struct timeval *tv)
{
tv->tv_usec = tv2->tv_usec - tv1->tv_usec;
tv->tv_sec = tv2->tv_sec - tv1->tv_sec;
if ((signed)tv->tv_sec > 0) {
if ((signed)tv->tv_usec < 0) {
tv->tv_usec += 1000000;
tv->tv_sec--;
}
} else if (tv->tv_sec == 0) {
if ((signed)tv->tv_usec < 0)
tv->tv_usec = 0;
} else {
tv->tv_sec = 0;
tv->tv_usec = 0;
}
return tv;
}
/*
* Computes the remaining time between tv1=now and event=tv2. if tv2 is passed,
* 0 is returned. The result is stored into tv. Returns ETERNITY if tv2 is
* eternity.
*/
#define tv_remain2 _tv_remain2
REGPRM3 struct timeval *_tv_remain2(const struct timeval *tv1, const struct timeval *tv2, struct timeval *tv);
REGPRM3 static inline struct timeval *__tv_remain2(const struct timeval *tv1, const struct timeval *tv2, struct timeval *tv)
{
if (tv_iseternity(tv2))
return tv_eternity(tv);
return __tv_remain(tv1, tv2, tv);
}
/*
* adds <ms> ms to <from>, set the result to <tv> and returns a pointer <tv>
*/