-#ifndef _WIN32
-
-/* Timing abstraction */
-
-struct time {
- struct timeval tv;
-};
-
-struct timeout {
- unsigned int ms;
- struct time start, delta, now, end;
- struct timeval delta_tv;
- bool overflow;
-};
-
-#define TIME_ZERO {.tv = {0, 0}}
-#define TIME_MS(ms) {.tv = {ms / 1000, (ms % 1000) * 1000}}
-
-const struct time max_delta = TIME_MS(INT_MAX);
-
-static void time_get(struct time *time)
-{
-#ifdef HAVE_CLOCK_GETTIME
- struct timespec ts;
- if (clock_gettime(CLOCK_MONOTONIC, &ts) == -1)
- clock_gettime(CLOCK_REALTIME, &ts);
- time->tv.tv_sec = ts.tv_sec;
- time->tv.tv_usec = ts.tv_nsec / 1000;
-#elif defined(__APPLE__)
- mach_timebase_info_data_t info;
- mach_timebase_info(&info);
- uint64_t ticks = mach_absolute_time();
- uint64_t ns = (ticks * info.numer) / info.denom;
- time->tv.tv_sec = ns / 1000000000;
- time->tv.tv_usec = (ns % 1000000000) / 1000;
-#else
- gettimeofday(&time->tv, NULL);
-#endif
-}
-
-static void time_set_ms(struct time *time, unsigned int ms)
-{
- time->tv.tv_sec = ms / 1000;
- time->tv.tv_usec = (ms % 1000) * 1000;
-}
-
-static void time_add(const struct time *a,
- const struct time *b, struct time *result)
-{
- timeradd(&a->tv, &b->tv, &result->tv);
-}
-
-static void time_sub(const struct time *a,
- const struct time *b, struct time *result)
-{
- timersub(&a->tv, &b->tv, &result->tv);
-}
-
-static bool time_greater(const struct time *a, const struct time *b)
-{
- return timercmp(&a->tv, &b->tv, >);
-}
-
-static void time_as_timeval(const struct time *time, struct timeval *tv)
-{
- *tv = time->tv;
-}
-
-static unsigned int time_as_ms(const struct time *time)
-{
- return time->tv.tv_sec * 1000 + time->tv.tv_usec / 1000;
-}
-
-static void timeout_start(struct timeout *timeout, unsigned int timeout_ms)
-{
- timeout->ms = timeout_ms;
-
- timeout->overflow = (timeout->ms > INT_MAX);
-
- /* Get time at start of operation. */
- time_get(&timeout->start);
- /* Define duration of timeout. */
- time_set_ms(&timeout->delta, timeout_ms);
- /* Calculate time at which we should give up. */
- time_add(&timeout->start, &timeout->delta, &timeout->end);
-}
-
-static bool timeout_check(struct timeout *timeout)
-{
- if (timeout->ms == 0)
- return false;
-
- time_get(&timeout->now);
- time_sub(&timeout->end, &timeout->now, &timeout->delta);
- if ((timeout->overflow = time_greater(&timeout->delta, &max_delta)))
- timeout->delta = max_delta;
-
- return time_greater(&timeout->now, &timeout->end);
-}
-
-static struct timeval *timeout_timeval(struct timeout *timeout)
-{
- if (timeout->ms == 0)
- return NULL;
-
- time_as_timeval(&timeout->delta, &timeout->delta_tv);
-
- return &timeout->delta_tv;
-}
-
-static unsigned int timeout_remaining_ms(struct timeout *timeout)
-{
- if (timeout->ms == 0)
- return -1;
- else if (timeout->overflow)
- return INT_MAX;
- else
- return time_as_ms(&timeout->delta);
-}
-
-#endif
-