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add legacy BSD-style timer*() macros in sys/time.h

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This commit is contained in:
Rich Felker 2011-04-10 22:46:46 -04:00
parent 4a19634f07
commit 691b20bec0
1 changed files with 10 additions and 0 deletions
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10
include/sys/time.h
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@ -42,6 +42,16 @@ struct timezone {
int tz_minuteswest;
int tz_dsttime;
};
#define timerisset(t) ((t)->tv_sec || (t)->tv_usec)
#define timerclear(t) ((t)->tv_sec = (t)->tv_usec = 0)
#define timercmp(s,t,op) ((s)->tv_sec == (t)->tv_sec ? \
(s)->tv_usec op (t)->tv_usec : (s)->tv_sec op (t)->tv_sec)
#define timeradd(s,t,a) ( (a)->tv_sec = (s)->tv_sec + (t)->tv_sec, \
((a)->tv_usec = (s)->tv_usec + (t)->tv_usec) >= 1000000 && \
((a)->tv_usec -= 1000000, (a)->tv_sec++) )
#define timersub(s,t,a) ( (a)->tv_sec = (s)->tv_sec - (t)->tv_sec, \
((a)->tv_usec = (s)->tv_usec - (t)->tv_usec) < 0 && \
((a)->tv_usec += 1000000, (a)->tv_sec--) )
#endif
#ifdef __cplusplus