44 lines
1.2 KiB
C
44 lines
1.2 KiB
C
/*
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* tsc.h
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*
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* Created on: Sep 28, 2010
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* Author: sears
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*/
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#ifndef TIME_H_
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#define TIME_H_
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#include <stasis/common.h>
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#include <sys/time.h>
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#include "log2.h"
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static inline unsigned long long stasis_get_tsc() {
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unsigned long long tsc;
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asm volatile ("rdtsc" : "=A" (tsc));
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return tsc;
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}
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static inline struct timeval stasis_subtract_timeval(const struct timeval a, const struct timeval b) {
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struct timeval ret = {a.tv_sec - b.tv_sec, a.tv_usec - b.tv_usec};
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if(ret.tv_usec < 0) { ret.tv_usec += 1000000; ret.tv_sec--; }
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return ret;
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}
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static inline double stasis_timeval_to_double(const struct timeval a) {
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return ((double)a.tv_sec) + (((double)a.tv_usec) / 1000000.0);
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}
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static inline struct timespec stasis_double_to_timespec(double a) {
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struct timespec ts;
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ts.tv_sec = (time_t)a;
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ts.tv_nsec = (long int)((a - (double)ts.tv_sec) * 1000000000.0);
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return ts;
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}
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static inline struct timeval stasis_double_to_timeval(double a) {
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struct timeval ts;
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ts.tv_sec = (time_t)a;
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ts.tv_usec = (long int)((a - (double)ts.tv_sec) * 1000000.0);
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return ts;
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}
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static inline uint8_t stasis_log_2_timeval(const struct timeval a) {
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return stasis_log_2_64((a.tv_sec * 1000000 + a.tv_usec));
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}
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#endif /* TIME_H_ */
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