0fb7d08872
Implement patty_timer_init() to allow the caller to specify a timer value to use each time patty_timer_start() is called, obviating the need to pass the same argument redundantly; if the timer value must be changed, then another call to patty_timer_init() may be used
58 lines
1.4 KiB
C
58 lines
1.4 KiB
C
#include <patty/timer.h>
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void patty_timer_init(patty_timer *timer, time_t ms) {
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timer->ms = ms;
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}
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int patty_timer_running(patty_timer *timer) {
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return (timer->flags & PATTY_TIMER_RUNNING)? 1: 0;
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}
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int patty_timer_expired(patty_timer *timer) {
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if (!(timer->flags & PATTY_TIMER_RUNNING)) {
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return 0;
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}
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return timer->t.tv_sec < 0
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|| (timer->t.tv_sec == 0 && timer->t.tv_nsec <= 0)? 1: 0;
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}
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void patty_timer_clear(patty_timer *timer) {
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timer->t.tv_sec = 0;
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timer->t.tv_nsec = 0;
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timer->flags &= ~PATTY_TIMER_RUNNING;
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}
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void patty_timer_start(patty_timer *timer) {
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timer->t.tv_sec = timer->ms / 1000;
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timer->t.tv_nsec = (timer->ms % 1000) * 1000000;
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timer->flags |= PATTY_TIMER_RUNNING;
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}
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void patty_timer_stop(patty_timer *timer) {
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timer->flags &= ~PATTY_TIMER_RUNNING;
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}
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void patty_timer_sub(struct timespec *a,
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struct timespec *b,
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struct timespec *c) {
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c->tv_nsec = a->tv_nsec - b->tv_nsec;
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c->tv_sec = a->tv_sec - b->tv_sec - (c->tv_nsec / 1000000000);
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c->tv_nsec %= 1000000000;
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}
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void patty_timer_tick(patty_timer *timer,
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struct timespec *elapsed) {
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struct timespec res;
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if (!(timer->flags & PATTY_TIMER_RUNNING)) {
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return;
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}
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patty_timer_sub(&timer->t, elapsed, &res);
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timer->t.tv_sec = res.tv_sec;
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timer->t.tv_nsec = res.tv_nsec;
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}
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