151 строка
2.7 KiB
C
151 строка
2.7 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/time.h>
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#include <sys/errno.h>
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#include <sys/types.h>
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#include <stdint.h>
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#include <time.h>
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#include "timer.h"
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double
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timeval_to_double(struct timeval * tv)
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{
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double d;
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d = tv->tv_sec + tv->tv_usec / 1000000;
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return d;
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}
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double
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timeval_diff(struct timeval * tv0, struct timeval * tv1)
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{
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return ((abs(tv1->tv_sec - tv0->tv_sec)) + (abs(tv1->tv_usec - tv0->tv_usec) / 1000000.0));
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}
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int
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timer_expired(struct timer * tp)
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{
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if (tp == NULL)
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return 0;
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struct timeval now;
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int64_t end = 0, current = 0;
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if (gettimeofday(&now, NULL) < 0) {
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perror("gettimeofday");
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return -1;
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}
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end += tp->end.tv_sec * 1000000;
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end += tp->end.tv_usec;
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current += now.tv_sec * 1000000;
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current += now.tv_usec;
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return current > end;
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}
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void
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update_timer(struct timer * tp, time_t sec, suseconds_t usec)
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{
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if (gettimeofday(&tp->begin, NULL) < 0) {
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perror("gettimeofday");
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}
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tp->end.tv_sec = tp->begin.tv_sec + (time_t) sec;
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tp->end.tv_usec = tp->begin.tv_usec + (time_t) usec;
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tp->expired = timer_expired;
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}
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struct timer *
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new_timer(time_t sec, suseconds_t usec)
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{
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struct timer *tp = NULL;
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tp = (struct timer *) calloc(1, sizeof(struct timer));
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if (tp == NULL) {
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perror("malloc");
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return NULL;
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}
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if (gettimeofday(&tp->begin, NULL) < 0) {
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perror("gettimeofday");
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return NULL;
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}
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tp->end.tv_sec = tp->begin.tv_sec + (time_t) sec;
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tp->end.tv_usec = tp->begin.tv_usec + (time_t) usec;
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tp->expired = timer_expired;
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return tp;
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}
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void
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free_timer(struct timer * tp)
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{
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free(tp);
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}
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int
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delay(int64_t ns)
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{
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struct timespec req, rem;
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req.tv_sec = 0;
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while (ns >= 1000000000L) {
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ns -= 1000000000L;
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req.tv_sec += 1;
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}
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req.tv_nsec = ns;
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while (nanosleep(&req, &rem) == -1)
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if (EINTR == errno)
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memcpy(&req, &rem, sizeof rem);
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else
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return -1;
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return 0;
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}
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# ifdef DELAY_SELECT_METHOD
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int
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delay(int us)
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{
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struct timeval tv;
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tv.tv_sec = 0;
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tv.tv_usec = us;
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(void) select(1, (fd_set *) 0, (fd_set *) 0, (fd_set *) 0, &tv);
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return (1);
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}
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#endif
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int64_t
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timer_remaining(struct timer * tp)
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{
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struct timeval now;
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long int end_time = 0, current_time = 0, diff = 0;
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if (gettimeofday(&now, NULL) < 0) {
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perror("gettimeofday");
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return -1;
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}
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end_time += tp->end.tv_sec * 1000000;
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end_time += tp->end.tv_usec;
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current_time += now.tv_sec * 1000000;
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current_time += now.tv_usec;
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diff = end_time - current_time;
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if (diff > 0)
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return diff;
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else
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return 0;
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}
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