65 lines
1.5 KiB
C
65 lines
1.5 KiB
C
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#ifndef _KERNEL_LIBKERN_TIME_H
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#define _KERNEL_LIBKERN_TIME_H
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#include <libkern/bits/time.h>
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#include <libkern/kassert.h>
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#include <libkern/types.h>
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static inline void timespec_add_nsec(timespec_t* time, int nsec)
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{
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ASSERT(-1000000000 < nsec && nsec < 1000000000);
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time->tv_nsec += nsec;
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if (time->tv_nsec >= 1000000000) {
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time->tv_nsec -= 1000000000;
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time->tv_sec++;
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}
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if (time->tv_nsec < 0) {
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time->tv_nsec += 1000000000;
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time->tv_sec--;
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}
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}
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static inline void timespec_add_usec(timespec_t* time, int usec)
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{
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int sec = usec / 1000000;
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int nsec = (usec % 1000000) * 1000;
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timespec_add_nsec(time, nsec);
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time->tv_sec += sec;
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}
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static inline void timespec_add_sec(timespec_t* time, int sec)
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{
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time->tv_sec += sec;
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}
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static inline void timespec_add_timespec(timespec_t* lhs, const timespec_t* rhs)
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{
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timespec_add_nsec(lhs, rhs->tv_nsec);
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lhs->tv_sec += rhs->tv_sec;
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}
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static inline void timespec_add_timeval(timespec_t* lhs, const timeval_t* rhs)
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{
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timespec_add_usec(lhs, rhs->tv_usec);
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lhs->tv_sec += rhs->tv_sec;
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}
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static inline int timespec_cmp(const timespec_t* a, const timespec_t* b)
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{
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if (a->tv_sec == b->tv_sec) {
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if (a->tv_nsec == b->tv_nsec) {
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return 0;
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}
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if (a->tv_nsec < b->tv_nsec) {
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return -1;
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}
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return 1;
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}
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if (a->tv_sec < b->tv_sec) {
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return -2;
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}
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return 2;
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}
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#endif // _KERNEL_LIBKERN_TIME_H
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