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darwin: simplify uv_hrtime

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mach_continuous_time is available since macOS 10.12, but our minimum
version is 11, so no need for a workaround.

Also, prefer that to `clock_gettime_nsec_np(CLOCK_MONOTONIC_RAW)` which
the documentation suggests
(https://developer.apple.com/documentation/driverkit/3438077-mach_continuous_time)
since the latter calls mach_timebase_info every time, unnecessarify: 49dcc07a40/Libc/gen/clock_gettime.c (L107)
This commit is contained in:
Saúl Ibarra Corretgé 2024-04-14 11:34:50 +02:00
parent f50ae53c42
commit c0a61c3bb3
1 changed files with 1 additions and 7 deletions
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8
src/unix/darwin.c
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@ -25,7 +25,6 @@
#include <stdint.h>
#include <errno.h>
#include <dlfcn.h>
#include <mach/mach.h>
#include <mach/mach_time.h>
#include <mach-o/dyld.h> /* _NSGetExecutablePath */
@ -34,7 +33,6 @@
#include <unistd.h> /* sysconf */
static uv_once_t once = UV_ONCE_INIT;
static uint64_t (*time_func)(void);
static mach_timebase_info_data_t timebase;
@ -56,16 +54,12 @@ void uv__platform_loop_delete(uv_loop_t* loop) {
static void uv__hrtime_init_once(void) {
if (KERN_SUCCESS != mach_timebase_info(&timebase))
abort();
time_func = (uint64_t (*)(void)) dlsym(RTLD_DEFAULT, "mach_continuous_time");
if (time_func == NULL)
time_func = mach_absolute_time;
}
uint64_t uv__hrtime(uv_clocktype_t type) {
uv_once(&once, uv__hrtime_init_once);
return time_func() * timebase.numer / timebase.denom;
return mach_continuous_time() * timebase.numer / timebase.denom;
}