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Added BSDish timer*() macros.

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git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@24683 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Ingo Weinhold 2008-03-30 17:28:31 +00:00
parent 5d81827b2c
commit 1bc2fbc25d
1 changed files with 24 additions and 0 deletions
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24
headers/posix/sys/time.h
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@ -49,4 +49,28 @@ extern int utimes(const char *name, const struct timeval times[2]);
}
#endif
/* BSDish macros operating on timeval structs */
#define timeradd(a, b, res) \
do { \
(res)->tv_sec = (a)->tv_sec + (b)->tv_sec; \
(res)->tv_usec = (a)->tv_usec + (b)->tv_usec; \
if ((res)->tv_usec >= 1000000) { \
(res)->tv_usec -= 1000000; \
(res)->tv_sec++; \
} \
} while (0)
#define timersub(a, b, res) \
do { \
(res)->tv_sec = (a)->tv_sec - (b)->tv_sec; \
(res)->tv_usec = (a)->tv_usec - (b)->tv_usec; \
if ((res)->tv_usec < 0) { \
(res)->tv_usec += 1000000; \
(res)->tv_sec--; \
} \
} while (0)
#define timerclear(a) ((a)->tv_sec = (a)->tv_usec = 0)
#define timerisset(a) ((a)->tv_sec != 0 || (a)->tv_usec != 0)
#define timercmp(a, b, cmp) ((a)->tv_sec == (b)->tv_sec \
? (a)->tv_usec cmp (b)->tv_usec : (a)->tv_sec cmp (b)->tv_sec)
#endif /* _SYS_TIME_H */