cosmopolitan/libc/thread/pthread_exit.c
2022-09-07 21:13:50 -07:00

45 lines
2.6 KiB
C

/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2022 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/intrin/pthread.h"
#include "libc/nexgen32e/gettls.h"
#include "libc/thread/posixthread.internal.h"
#include "libc/thread/spawn.h"
#include "libc/thread/thread.h"
/**
* Terminates current POSIX thread.
*
* If this function is called from the main thread, or a thread created
* with clone() or _spawn(), then this function is the same as _Exit1()
* in which case `rc` is coerced to a `uint8_t` exit status, which will
* only be reported to the parent process on Linux, FreeBSD and Windows
*
* @param rc is reported later to pthread_join()
* @threadsafe
* @noreturn
*/
wontreturn void pthread_exit(void *rc) {
struct PosixThread *pt;
if ((pt = ((cthread_t)__get_tls())->pthread)) {
pt->rc = rc;
longjmp(pt->exiter, 1);
} else {
_Exit1((int)(intptr_t)rc);
}
}