mirror of
https://github.com/jart/cosmopolitan.git
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58 lines
2.7 KiB
C
58 lines
2.7 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/calls/struct/timespec.h"
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#include "libc/calls/struct/timespec.internal.h"
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#include "libc/calls/struct/timeval.h"
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#include "libc/errno.h"
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#include "libc/fmt/conv.h"
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#include "libc/sock/internal.h"
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#include "libc/sysv/consts/clock.h"
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int sys_nanosleep_xnu(const struct timespec *req, struct timespec *rem) {
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int rc;
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axdx_t axdx;
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struct timeval tv;
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struct timespec begin, end, elapsed;
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if (rem) {
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if (sys_clock_gettime_xnu(CLOCK_MONOTONIC, &begin) == -1) {
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return -1;
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}
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}
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tv = _timespec2timeval(*req);
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rc = sys_select(0, 0, 0, 0, &tv);
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if (rem) {
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if (!rc) {
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rem->tv_sec = 0;
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rem->tv_nsec = 0;
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} else if (rc == -1 && errno == EINTR) {
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sys_clock_gettime_xnu(CLOCK_MONOTONIC, &end);
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elapsed = _timespec_sub(end, begin);
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*rem = _timespec_sub(*req, elapsed);
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if (rem->tv_sec < 0) {
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rem->tv_sec = 0;
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rem->tv_nsec = 0;
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}
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}
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}
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return rc;
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}
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