/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│ │ vi: set et ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi │ ╞══════════════════════════════════════════════════════════════════════════════╡ │ Copyright 2024 Justine Alexandra Roberts Tunney │ │ │ │ Permission to use, copy, modify, and/or distribute this software for │ │ any purpose with or without fee is hereby granted, provided that the │ │ above copyright notice and this permission notice appear in all copies. │ │ │ │ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │ │ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │ │ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │ │ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │ │ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │ │ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │ │ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │ │ PERFORMANCE OF THIS SOFTWARE. │ ╚─────────────────────────────────────────────────────────────────────────────*/ #include "libc/testlib/manystack.h" #include "libc/atomic.h" #include "libc/calls/struct/sigaction.h" #include "libc/calls/struct/sigset.h" #include "libc/intrin/dll.h" #include "libc/sysv/consts/sig.h" #include "libc/thread/posixthread.internal.h" static atomic_int manystack_gotsig; static atomic_bool manystack_shutdown; static void manystack_signal(int sig) { manystack_gotsig = sig; } static void *manystack_thread(void *arg) { sigset_t ss; sigfillset(&ss); sigdelset(&ss, SIGUSR2); while (!manystack_shutdown) { sigsuspend(&ss); if (!manystack_shutdown) { _pthread_lock(); for (struct Dll *e = dll_first(_pthread_list); e; e = dll_next(_pthread_list, e)) { pthread_t th = (pthread_t)POSIXTHREAD_CONTAINER(e); if (!pthread_equal(th, pthread_self())) pthread_kill(th, SIGQUIT); } _pthread_unlock(); } } return 0; } pthread_t manystack_start(void) { sigset_t ss; pthread_t msh; sigemptyset(&ss); sigaddset(&ss, SIGUSR2); sigprocmask(SIG_BLOCK, &ss, 0); signal(SIGUSR2, manystack_signal); pthread_create(&msh, 0, manystack_thread, 0); return msh; } void manystack_stop(pthread_t msh) { manystack_shutdown = true; pthread_kill(msh, SIGUSR2); pthread_join(msh, 0); }