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