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Merge pull request #1627 from nlordell/fix/system-monotonic-clock

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Read System Clock for Monotonic Time
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Calvin Rose 2025-08-18 07:53:26 -05:00 committed by GitHub
commit 697fdcff6d
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1 changed files with 14 additions and 17 deletions
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src/core/util.c
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@ -931,27 +931,24 @@ int janet_gettime(struct timespec *spec, enum JanetTimeSource source) {
#include <mach/clock.h> #include <mach/clock.h>
#include <mach/mach.h> #include <mach/mach.h>
int janet_gettime(struct timespec *spec, enum JanetTimeSource source) { int janet_gettime(struct timespec *spec, enum JanetTimeSource source) {
if (source == JANET_TIME_REALTIME) {
clock_serv_t cclock;
mach_timespec_t mts;
host_get_clock_service(mach_host_self(), CALENDAR_CLOCK, &cclock);
clock_get_time(cclock, &mts);
mach_port_deallocate(mach_task_self(), cclock);
spec->tv_sec = mts.tv_sec;
spec->tv_nsec = mts.tv_nsec;
} else if (source == JANET_TIME_MONOTONIC) {
clock_serv_t cclock;
int nsecs;
mach_msg_type_number_t count;
host_get_clock_service(mach_host_self(), SYSTEM_CLOCK, &cclock);
clock_get_attributes(cclock, CLOCK_GET_TIME_RES, (clock_attr_t)&nsecs, &count);
mach_port_deallocate(mach_task_self(), cclock);
clock_getres(CLOCK_MONOTONIC, spec);
}
if (source == JANET_TIME_CPUTIME) { if (source == JANET_TIME_CPUTIME) {
clock_t tmp = clock(); clock_t tmp = clock();
spec->tv_sec = tmp / CLOCKS_PER_SEC; spec->tv_sec = tmp / CLOCKS_PER_SEC;
spec->tv_nsec = ((tmp - (spec->tv_sec * CLOCKS_PER_SEC)) * 1000000000) / CLOCKS_PER_SEC; spec->tv_nsec = ((tmp - (spec->tv_sec * CLOCKS_PER_SEC)) * 1000000000) / CLOCKS_PER_SEC;
} else {
clock_serv_t cclock;
mach_timespec_t mts;
clock_id_t cid = CALENDAR_CLOCK;
if (source == JANET_TIME_REALTIME) {
cid = CALENDAR_CLOCK;
} else if (source == JANET_TIME_MONOTONIC) {
cid = SYSTEM_CLOCK;
}
host_get_clock_service(mach_host_self(), cid, &cclock);
clock_get_time(cclock, &mts);
mach_port_deallocate(mach_task_self(), cclock);
spec->tv_sec = mts.tv_sec;
spec->tv_nsec = mts.tv_nsec;
} }
return 0; return 0;
} }