Mikhail Romanko
e382d4ed13
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83 lines
1.7 KiB
C
83 lines
1.7 KiB
C
#define _POSIX_C_SOURCE 200112L
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#include "../CgeTimer.h"
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#include <stdlib.h>
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#include <sys/time.h>
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#include <time.h>
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#include <unistd.h>
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enum Type {
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TYPE_UNDEFINED,
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TYPE_OLD_REALTIME,
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TYPE_NEW_REALTIME,
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TYPE_MONOTONIC
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};
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static int timerType = TYPE_UNDEFINED;
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static int checkAvailableTimer(void) {
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#if (_POSIX_TIMERS > 0)
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struct timespec ts;
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#endif
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if (timerType != TYPE_UNDEFINED)
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return timerType;
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#if (_POSIX_TIMERS > 0)
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if (!clock_gettime(CLOCK_MONOTONIC, &ts)) {
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timerType = TYPE_MONOTONIC;
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} else if (!clock_gettime(CLOCK_REALTIME, &ts)) {
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timerType = TYPE_NEW_REALTIME;
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} else
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#endif
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timerType = TYPE_OLD_REALTIME;
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return timerType;
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}
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static void getTimer(uint64_t *sec, uint64_t *nsec) {
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#if (_POSIX_TIMERS > 0)
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struct timespec ts;
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#endif
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struct timeval tv;
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switch (checkAvailableTimer()) {
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#if (_POSIX_TIMERS > 0)
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case TYPE_MONOTONIC:
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clock_gettime(CLOCK_MONOTONIC, &ts);
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*sec = ts.tv_sec;
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*nsec = ts.tv_nsec;
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break;
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case TYPE_NEW_REALTIME:
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clock_gettime(CLOCK_REALTIME, &ts);
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*sec = ts.tv_sec;
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*nsec = ts.tv_nsec;
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break;
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#endif
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default:
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case TYPE_OLD_REALTIME:
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gettimeofday(&tv, NULL);
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*sec = tv.tv_sec;
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*nsec = tv.tv_usec * (uint64_t)1000;
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break;
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}
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}
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int CgeTimerIsMonotonic(void) {
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return checkAvailableTimer() == TYPE_MONOTONIC;
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}
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uint64_t CgeTimerMilliseconds(void) {
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uint64_t newSec, newNsec;
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getTimer(&newSec, &newNsec);
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return (newSec * 1000u) + (newNsec / 1000000ul);
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}
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uint64_t CgeTimerNanoseconds(void) {
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uint64_t newSec, newNsec;
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getTimer(&newSec, &newNsec);
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return (newSec * 1000000000ul) + newNsec;
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}
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