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e16a7d8f3b
`et` means `expandtab`. ```sh rg 'vi: .* :vi' -l -0 | \ xargs -0 sed -i '' 's/vi: \(.*\) et\(.*\) :vi/vi: \1 xoet\2:vi/' rg 'vi: .* :vi' -l -0 | \ xargs -0 sed -i '' 's/vi: \(.*\)noet\(.*\):vi/vi: \1et\2 :vi/' rg 'vi: .* :vi' -l -0 | \ xargs -0 sed -i '' 's/vi: \(.*\)xoet\(.*\):vi/vi: \1noet\2:vi/' ```
68 lines
3.3 KiB
C
68 lines
3.3 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│ vi: set et 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/cp.internal.h"
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#include "libc/calls/internal.h"
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#include "libc/calls/sig.internal.h"
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#include "libc/calls/struct/sigset.h"
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#include "libc/calls/struct/sigset.internal.h"
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#include "libc/dce.h"
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#include "libc/errno.h"
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#include "libc/intrin/asan.internal.h"
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#include "libc/intrin/atomic.h"
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#include "libc/intrin/strace.internal.h"
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#include "libc/nt/synchronization.h"
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#include "libc/sysv/consts/sig.h"
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#include "libc/sysv/errfuns.h"
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#include "libc/thread/tls.h"
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/**
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* Blocks until SIG ∉ MASK is delivered to thread.
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*
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* This temporarily replaces the signal mask until a signal that it
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* doesn't contain is delivered.
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*
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* @param ignore is a bitset of signals to block temporarily, which if
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* NULL is equivalent to passing an empty signal set
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* @return -1 w/ EINTR (or possibly EFAULT)
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* @cancelationpoint
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* @asyncsignalsafe
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* @norestart
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*/
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int sigsuspend(const sigset_t *ignore) {
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int rc;
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BEGIN_CANCELATION_POINT;
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if (IsAsan() && ignore && !__asan_is_valid(ignore, sizeof(*ignore))) {
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rc = efault();
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} else if (IsXnu() || IsOpenbsd()) {
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// openbsd and xnu use a 32 signal register convention
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rc = sys_sigsuspend(ignore ? (void *)(intptr_t)(uint32_t)*ignore : 0, 8);
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} else {
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sigset_t waitmask = ignore ? *ignore : 0;
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if (IsWindows() || IsMetal()) {
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while (!(rc = _park_norestart(-1u, waitmask))) donothing;
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} else {
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rc = sys_sigsuspend((uint64_t[2]){waitmask}, 8);
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}
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}
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END_CANCELATION_POINT;
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STRACE("sigsuspend(%s) → %d% m", DescribeSigset(0, ignore), rc);
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return rc;
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}
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