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69 lines
1.3 KiB
69 lines
1.3 KiB
#define _POSIX_C_SOURCE 200809l
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#include <time.h>
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#include "timer.h"
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const clockid_t CLOCK_ID = CLOCK_PROCESS_CPUTIME_ID;
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struct _timer {
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struct timespec start, stop;
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struct timespec times[TIMER_MAX_PARTIAL];
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} timer = {0};
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int timer_start(void) { return clock_gettime(CLOCK_ID, &timer.start); }
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int timer_reset(void)
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{
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timer = (struct _timer) {0};
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return 0;
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}
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int timer_stop(void) { return clock_gettime(CLOCK_ID, &timer.stop); }
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// partial clocks also update the stop time
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int timer_partial(int idx)
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{
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if (idx > TIMER_MAX_PARTIAL || idx < 0) {
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return -1;
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}
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clock_gettime(CLOCK_ID, &timer.stop);
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return clock_gettime(CLOCK_ID, &(timer.times[idx]));
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}
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size_t timer_get_us(int idx)
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{
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if (idx > TIMER_MAX_PARTIAL) {
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return -1;
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}
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struct timespec ts = {0};
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if (idx < 0) {
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ts = timer.stop;
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} else {
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ts = timer.times[idx];
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}
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ts.tv_sec -= timer.start.tv_sec;
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ts.tv_nsec -= timer.start.tv_nsec;
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// FIXME: check overflow
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return (ts.tv_nsec / 1000) + (ts.tv_sec * 1000000);
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}
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double timer_get_sec(int idx)
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{
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if (idx > TIMER_MAX_PARTIAL) {
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return -1;
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}
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struct timespec ts = {0};
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if (idx < 0) {
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ts = timer.stop;
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} else {
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ts = timer.times[idx];
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}
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ts.tv_sec -= timer.start.tv_sec;
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ts.tv_nsec -= timer.start.tv_nsec;
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return (double)ts.tv_sec + ((double)ts.tv_nsec / 1e9);
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}
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