mirror of
https://github.com/jart/cosmopolitan.git
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73 lines
3.2 KiB
C
73 lines
3.2 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/intrin/atomic.h"
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#include "libc/intrin/pthread.h"
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#include "libc/mem/mem.h"
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#include "libc/nexgen32e/gettls.h"
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#include "libc/runtime/runtime.h"
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#include "libc/thread/posixthread.internal.h"
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#include "libc/thread/thread.h"
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static int PosixThread(void *arg, int tid) {
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struct PosixThread *pt = arg;
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enum PosixThreadStatus status;
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pt->tid = tid;
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if (!setjmp(pt->exiter)) {
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((cthread_t)__get_tls())->pthread = pt;
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pt->rc = pt->start_routine(pt->arg);
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}
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if (atomic_load_explicit(&pt->status, memory_order_relaxed) ==
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kPosixThreadDetached) {
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atomic_store_explicit(&pt->status, kPosixThreadZombie,
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memory_order_relaxed);
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} else {
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atomic_store_explicit(&pt->status, kPosixThreadTerminated,
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memory_order_relaxed);
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}
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return 0;
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}
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/**
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* Creates thread.
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*
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* @return 0 on success, or errno on error
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*/
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int pthread_create(pthread_t *thread, const pthread_attr_t *attr,
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void *(*start_routine)(void *), void *arg) {
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int e, rc;
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struct PosixThread *pt;
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e = errno;
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pthread_zombies_decimate();
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if ((pt = calloc(1, sizeof(struct PosixThread)))) {
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pt->start_routine = start_routine;
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pt->arg = arg;
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if (!_spawn(PosixThread, pt, &pt->spawn)) {
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*thread = pt;
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rc = 0;
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} else {
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free(pt);
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rc = errno;
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}
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} else {
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rc = errno;
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}
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errno = e;
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return rc;
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}
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