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https://github.com/jart/cosmopolitan.git
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dd8c4dbd7d
There's now a much stronger level of assurance that signaling on Windows will be atomic, low-latency, low tail latency, and shall never deadlock.
40 lines
2.5 KiB
C
40 lines
2.5 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 2024 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/internal.h"
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#include "libc/calls/sig.internal.h"
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#include "libc/intrin/weaken.h"
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#include "libc/sysv/consts/sicode.h"
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#include "libc/sysv/errfuns.h"
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textwindows int __sigcheck(sigset_t waitmask, bool restartable) {
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int sig, handler_was_called = 0;
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if (_check_cancel() == -1)
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return -1;
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while (_weaken(__sig_get) && (sig = _weaken(__sig_get)(waitmask))) {
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handler_was_called |= _weaken(__sig_relay)(sig, SI_KERNEL, waitmask);
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if (_check_cancel() == -1)
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return -1;
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}
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if (handler_was_called & SIG_HANDLED_NO_RESTART)
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return eintr();
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if (handler_was_called & SIG_HANDLED_SA_RESTART)
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if (!restartable)
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return eintr();
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return 0;
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}
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