mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-03-05 08:26:29 +00:00
4a6fd3d910
- fix rare thread exit race condition on openbsd - pthread_getattr_np() now supplies detached status - child threads may now pthread_join() the main thread - introduce sigandset(), sigorset(), and sigisemptyset() - introduce pthread_cleanup_push() and pthread_cleanup_pop()
50 lines
2.6 KiB
C
50 lines
2.6 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/errno.h"
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#include "libc/thread/posixthread.internal.h"
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#include "libc/thread/thread.h"
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#include "libc/thread/tls.h"
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/**
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* Waits for thread to terminate.
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*
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* @param value_ptr if non-null will receive pthread_exit() argument
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* @return 0 on success, or errno with error
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* @raise EDEADLK if `thread` is the current thread
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* @raise EINVAL if `thread` is detached
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* @returnserrno
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* @threadsafe
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*/
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int pthread_join(pthread_t thread, void **value_ptr) {
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struct PosixThread *pt;
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if (thread == __get_tls()->tib_pthread) {
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return EDEADLK;
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}
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if (!(pt = (struct PosixThread *)thread) || //
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pt->status == kPosixThreadZombie || //
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pt->status == kPosixThreadDetached) {
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return EINVAL;
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}
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_pthread_wait(pt);
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if (value_ptr) {
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*value_ptr = pt->rc;
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}
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_pthread_free(pt);
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return 0;
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}
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