mirror of
https://github.com/jart/cosmopolitan.git
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e961385e55
wait4() is now solid enough to run `make -j100` on Windows. You can now use MSG_DONTWAIT on Windows. There was a handle leak in accept() that's been fixed. Our WIN32 overlapped i/o code has been simplified. Priority class now inherits into subprocesses, so the verynice command will work and the signal mask will now be inherited by execve() and posix_spawn()
64 lines
3 KiB
C
64 lines
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 net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2023 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/ucontext.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/intrin/atomic.h"
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#include "libc/sysv/consts/sig.h"
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#include "libc/thread/tls.h"
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int __tailcontext(const ucontext_t *);
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/**
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* Sets machine context.
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*
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* @return -1 on error w/ errno, otherwise won't return unless sent back
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* @see swapcontext()
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* @see makecontext()
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* @see getcontext()
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*/
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int setcontext(const ucontext_t *uc) {
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if (IsWindows()) {
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atomic_store_explicit(&__get_tls()->tib_sigmask, uc->uc_sigmask,
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memory_order_release);
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} else {
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sys_sigprocmask(SIG_SETMASK, &uc->uc_sigmask, 0);
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}
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return __tailcontext(uc);
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}
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int __getcontextsig(ucontext_t *uc) {
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if (IsWindows()) {
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uc->uc_sigmask =
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atomic_load_explicit(&__get_tls()->tib_sigmask, memory_order_acquire);
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return 0;
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} else {
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return sys_sigprocmask(SIG_SETMASK, 0, &uc->uc_sigmask);
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}
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}
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int __swapcontextsig(ucontext_t *x, const ucontext_t *y) {
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if (IsWindows()) {
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x->uc_sigmask = atomic_exchange_explicit(
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&__get_tls()->tib_sigmask, y->uc_sigmask, memory_order_acquire);
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return 0;
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} else {
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return sys_sigprocmask(SIG_SETMASK, &y->uc_sigmask, &x->uc_sigmask);
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}
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}
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