46 lines
1.1 KiB
C
46 lines
1.1 KiB
C
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/*
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This file is part of "Ostinato"
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These macros are copied from BSD sys/time.h
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*/
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/* Operations on timespecs. */
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#ifndef timespecclear
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#define timespecclear(tsp) (tsp)->tv_sec = (tsp)->tv_nsec = 0
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#endif
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#ifndef timespecisset
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#define timespecisset(tsp) ((tsp)->tv_sec || (tsp)->tv_nsec)
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#endif
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#ifndef timespeccmp
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#define timespeccmp(tsp, usp, cmp) \
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(((tsp)->tv_sec == (usp)->tv_sec) ? \
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((tsp)->tv_nsec cmp (usp)->tv_nsec) : \
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((tsp)->tv_sec cmp (usp)->tv_sec))
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#endif
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#ifndef timespecadd
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#define timespecadd(tsp, usp, vsp) \
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do { \
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(vsp)->tv_sec = (tsp)->tv_sec + (usp)->tv_sec; \
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(vsp)->tv_nsec = (tsp)->tv_nsec + (usp)->tv_nsec; \
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if ((vsp)->tv_nsec >= 1000000000L) { \
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(vsp)->tv_sec++; \
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(vsp)->tv_nsec -= 1000000000L; \
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} \
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} while (0)
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#endif
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#ifndef timespecsub
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#define timespecsub(tsp, usp, vsp) \
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do { \
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(vsp)->tv_sec = (tsp)->tv_sec - (usp)->tv_sec; \
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(vsp)->tv_nsec = (tsp)->tv_nsec - (usp)->tv_nsec; \
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if ((vsp)->tv_nsec < 0) { \
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(vsp)->tv_sec--; \
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(vsp)->tv_nsec += 1000000000L; \
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} \
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} while (0)
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#endif
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