mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-01-31 19:43:32 +00:00
bcf9af94bf
- Now using 10x better GCD semaphores - We now generate Linux-like thread ids - We now use fast system clock / sleep libraries - The APE M1 loader now generates Linux-like stacks
51 lines
2.8 KiB
C
51 lines
2.8 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 2020 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/struct/timespec.h"
|
|
#include "libc/calls/struct/timespec.internal.h"
|
|
#include "libc/calls/struct/timeval.h"
|
|
#include "libc/calls/struct/timeval.internal.h"
|
|
#include "libc/calls/syscall-sysv.internal.h"
|
|
#include "libc/errno.h"
|
|
#include "libc/runtime/syslib.internal.h"
|
|
#include "libc/sock/internal.h"
|
|
|
|
// nanosleep() on xnu: a bloodbath of a polyfill
|
|
// consider using clock_nanosleep(TIMER_ABSTIME)
|
|
int sys_nanosleep_xnu(const struct timespec *req, struct timespec *rem) {
|
|
#ifdef __x86_64__
|
|
int rc;
|
|
struct timeval wt, t1, t2, td;
|
|
if (rem) sys_gettimeofday_xnu(&t1, 0, 0);
|
|
wt = timespec_totimeval(*req); // rounds up
|
|
rc = sys_select(0, 0, 0, 0, &wt);
|
|
if (rem && rc == -1 && errno == EINTR) {
|
|
sys_gettimeofday_xnu(&t2, 0, 0);
|
|
td = timeval_sub(t2, t1);
|
|
if (timeval_cmp(td, wt) >= 0) {
|
|
rem->tv_sec = 0;
|
|
rem->tv_nsec = 0;
|
|
} else {
|
|
*rem = timeval_totimespec(timeval_sub(wt, td));
|
|
}
|
|
}
|
|
return rc;
|
|
#else
|
|
return _sysret(__syslib->nanosleep(req, rem));
|
|
#endif
|
|
}
|