qosres: util_timeval.h Source File

00001 #include <sys/time.h>
00002 #include <time.h>
00003 
00005 static inline void timeval_add(struct timeval *dst_ts, const struct timeval *src1_ts, const struct timeval *src2_ts) {
00006   dst_ts->tv_sec = src1_ts->tv_sec + src2_ts->tv_sec;
00007   dst_ts->tv_usec = src1_ts->tv_usec + src2_ts->tv_usec;
00008   long int delta_us = dst_ts->tv_usec - 1000000lu;
00009   if (delta_us >= 0) {
00010     dst_ts->tv_usec = delta_us;
00011     dst_ts->tv_sec++;
00012   }
00013 }
00014 
00019 static inline void timeval_sub(struct timeval *dst_ts, const struct timeval *src1_ts, const struct timeval *src2_ts) {
00020   dst_ts->tv_sec = src1_ts->tv_sec - src2_ts->tv_sec;
00021   dst_ts->tv_usec = src1_ts->tv_usec - src2_ts->tv_usec;
00022   if (dst_ts->tv_usec < 0) {
00023     dst_ts->tv_usec = dst_ts->tv_usec + 1000000lu;
00024     dst_ts->tv_sec--;
00025   }
00026 }
00027 
00028 static inline long timeval_sub_us(const struct timeval *src1_tv, const struct timeval *src2_tv) {
00029   return (src1_tv->tv_sec - src2_tv->tv_sec) * 1000000L
00030       + (src1_tv->tv_usec - src2_tv->tv_usec);
00031 }
00032 
00033 static inline int timeval_lt(const struct timeval *t1, const struct timeval *t2) {
00034   return (t1->tv_sec < t2->tv_sec)
00035     || ((t1->tv_sec == t2->tv_sec) && (t1->tv_usec < t2->tv_usec));
00036 }
00037 
00038 static inline int timeval_le(const struct timeval *t1, const struct timeval *t2) {
00039   return (t1->tv_sec < t2->tv_sec)
00040     || ((t1->tv_sec == t2->tv_sec) && (t1->tv_usec <= t2->tv_usec));
00041 }
00042 
00043 static inline int timeval_eq(const struct timeval *t1, const struct timeval *t2) {
00044   return (t1->tv_sec == t2->tv_sec) && (t1->tv_usec == t2->tv_usec);
00045 }