mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-01-31 19:43:32 +00:00
e522aa3a07
- ASAN memory morgue is now lockless - Make C11 atomics header more portable - Rewrote pthread keys support to be lockless - Simplify Python's unicode table unpacking code - Make crash report write(2) closer to being atomic - Make it possible to strace/ftrace a single thread - ASAN now checks nul-terminated strings fast and properly - Windows fork() now restores TLS memory of calling thread
60 lines
2.7 KiB
C
60 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 2022 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/sig.internal.h"
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#include "libc/calls/struct/sigset.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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#define GetSigBit(x) (1ull << (((x)-1) & 63))
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textwindows int __sig_mask(int how, const sigset_t *neu, sigset_t *old) {
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uint64_t x, y, *mask;
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if (how == SIG_BLOCK || how == SIG_UNBLOCK || how == SIG_SETMASK) {
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if (__tls_enabled) {
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mask = &__get_tls()->tib_sigmask;
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} else {
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mask = &__sig.sigmask;
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}
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if (old) {
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old->__bits[0] = *mask;
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old->__bits[1] = 0;
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}
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if (neu) {
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x = *mask;
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y = neu->__bits[0];
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if (how == SIG_BLOCK) {
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x |= y;
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} else if (how == SIG_UNBLOCK) {
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x &= ~y;
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} else {
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x = y;
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}
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x &= ~(0
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#define M(x) | GetSigBit(x)
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#include "libc/intrin/sigisprecious.inc"
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);
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*mask = x;
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}
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return 0;
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} else {
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return einval();
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}
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}
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