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https://github.com/jart/cosmopolitan.git
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7e0a09feec
This change ports APE Loader to Linux AARCH64, so that Raspberry Pi users can run programs like redbean, without the executable needing to modify itself. Progress has also slipped into this change on the issue of making progress better conforming to user expectations and industry standards regarding which symbols we're allowed to declare
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 -*-│
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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/assert.h"
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#include "libc/calls/struct/timespec.h"
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#include "libc/errno.h"
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#include "libc/limits.h"
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#include "libc/sysv/consts/clock.h"
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#include "libc/time/time.h"
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/**
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* Sleeps for particular number of seconds.
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*
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* @return 0 if the full time elapsed, otherwise we assume an interrupt
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* was delivered, in which case the errno condition is ignored, and
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* this function shall return the number of unslept seconds rounded
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* using the ceiling function, and finally `-1u` may be returned if
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* thread was cancelled with `PTHREAD_CANCEL_MASKED` in play
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* @see clock_nanosleep()
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* @cancellationpoint
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* @asyncsignalsafe
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* @norestart
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*/
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unsigned sleep(unsigned seconds) {
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errno_t rc;
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unsigned unslept;
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struct timespec tv = {seconds};
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if (!(rc = clock_nanosleep(CLOCK_REALTIME, 0, &tv, &tv))) return 0;
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if (rc == ECANCELED) return -1u;
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npassert(rc == EINTR);
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unslept = tv.tv_sec;
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if (tv.tv_nsec && unslept < UINT_MAX) {
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++unslept;
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}
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return unslept;
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}
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