mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-01-31 19:43:32 +00:00
70 lines
3.2 KiB
C
70 lines
3.2 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
|
|
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
|
|
╞══════════════════════════════════════════════════════════════════════════════╡
|
|
│ Copyright 2022 Justine Alexandra Roberts Tunney │
|
|
│ │
|
|
│ Permission to use, copy, modify, and/or distribute this software for │
|
|
│ any purpose with or without fee is hereby granted, provided that the │
|
|
│ above copyright notice and this permission notice appear in all copies. │
|
|
│ │
|
|
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
|
|
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
|
|
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
|
|
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
|
|
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
|
|
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
|
|
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
|
|
│ PERFORMANCE OF THIS SOFTWARE. │
|
|
╚─────────────────────────────────────────────────────────────────────────────*/
|
|
#include "libc/calls/asan.internal.h"
|
|
#include "libc/calls/strace.internal.h"
|
|
#include "libc/calls/struct/timespec.internal.h"
|
|
#include "libc/dce.h"
|
|
#include "libc/intrin/describeflags.internal.h"
|
|
#include "libc/sysv/consts/clock.h"
|
|
#include "libc/sysv/errfuns.h"
|
|
#include "libc/time/time.h"
|
|
|
|
int sys_clock_getres(int, struct timespec *) hidden;
|
|
|
|
static int sys_clock_getres_poly(int clock, struct timespec *ts, int64_t real) {
|
|
if (clock == CLOCK_REALTIME) {
|
|
ts->tv_sec = 0;
|
|
ts->tv_nsec = real;
|
|
return 0;
|
|
} else if (clock == CLOCK_MONOTONIC) {
|
|
ts->tv_sec = 0;
|
|
ts->tv_nsec = 1;
|
|
return 0;
|
|
} else {
|
|
return einval();
|
|
}
|
|
}
|
|
|
|
static int sys_clock_getres_nt(int clock, struct timespec *ts) {
|
|
return sys_clock_getres_poly(clock, ts, 100);
|
|
}
|
|
|
|
static int sys_clock_getres_xnu(int clock, struct timespec *ts) {
|
|
return sys_clock_getres_poly(clock, ts, 1000);
|
|
}
|
|
|
|
/**
|
|
* Returns granularity of clock.
|
|
*/
|
|
int clock_getres(int clock, struct timespec *ts) {
|
|
int rc;
|
|
if (!ts || (IsAsan() && !__asan_is_valid_timespec(ts))) {
|
|
rc = efault();
|
|
} else if (clock == 127) {
|
|
rc = einval(); // 127 is used by consts.sh to mean unsupported
|
|
} else if (IsWindows()) {
|
|
rc = sys_clock_getres_nt(clock, ts);
|
|
} else if (IsXnu()) {
|
|
rc = sys_clock_getres_xnu(clock, ts);
|
|
} else {
|
|
rc = sys_clock_getres(clock, ts);
|
|
}
|
|
STRACE("clock_getres(%d, [%s]) → %d% m", clock, DescribeTimespec(rc, ts), rc);
|
|
return rc;
|
|
}
|