mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-02-07 15:03:34 +00:00
8cdec62f5b
- Finish cleaning up the stdio unlocked APIs - Make __cxa_finalize() properly thread safe - Don't log locks if threads aren't being used - Add some more mutex guards to places using _mmi - Specific lock names now appear in the --ftrace logs - Fix mkdeps.com generating invalid Makefiles sometimes - Simplify and fix bugs in the test runner infrastructure - Fix issue where sometimes some functions wouldn't be logged
45 lines
2.5 KiB
C
45 lines
2.5 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/assert.h"
|
|
#include "libc/bits/atomic.h"
|
|
#include "libc/calls/calls.h"
|
|
#include "libc/dce.h"
|
|
#include "libc/intrin/kprintf.h"
|
|
#include "libc/intrin/pthread.h"
|
|
#include "libc/nexgen32e/threaded.h"
|
|
#include "libc/sysv/consts/futex.h"
|
|
|
|
/**
|
|
* Releases mutex.
|
|
*/
|
|
int pthread_mutex_unlock(pthread_mutex_t *mutex) {
|
|
int owner;
|
|
bool shouldunlock;
|
|
assert(mutex->reent > 0);
|
|
shouldunlock = --mutex->reent <= 0;
|
|
assert(mutex->owner == gettid());
|
|
if (shouldunlock) {
|
|
atomic_store_explicit(&mutex->owner, 0, memory_order_relaxed);
|
|
if (IsLinux() &&
|
|
atomic_load_explicit(&mutex->waits, memory_order_acquire)) {
|
|
futex((void *)&mutex->owner, FUTEX_WAKE, 1, 0, 0);
|
|
}
|
|
}
|
|
return 0;
|
|
}
|