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Add pthread attributes and other libc functions

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Justine Tunney 2022-09-07 05:23:44 -07:00
parent d5c9308a43
commit 4339d9f15e
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GPG key ID: BE714B4575D6E328
81 changed files with 1111 additions and 428 deletions
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10
libc/intrin/pthread_mutex_unlock.c
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@ -18,6 +18,7 @@
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/assert.h"
#include "libc/calls/calls.h"
#include "libc/dce.h"
#include "libc/errno.h"
#include "libc/intrin/atomic.h"
#include "libc/intrin/futex.internal.h"
@ -31,14 +32,14 @@
*/
int pthread_mutex_unlock(pthread_mutex_t *mutex) {
int c, me, owner;
switch (mutex->attr) {
switch (mutex->type) {
case PTHREAD_MUTEX_NORMAL:
// From Futexes Are Tricky Version 1.1 § Mutex, Take 3;
// Ulrich Drepper, Red Hat Incorporated, June 27, 2004.
if ((c = atomic_fetch_sub_explicit(&mutex->lock, 1,
memory_order_release)) != 1) {
atomic_store_explicit(&mutex->lock, 0, memory_order_release);
_futex_wake_private(&mutex->lock, 1);
_futex_wake(&mutex->lock, 1, mutex->pshared);
}
return 0;
case PTHREAD_MUTEX_ERRORCHECK:
@ -52,8 +53,9 @@ int pthread_mutex_unlock(pthread_mutex_t *mutex) {
case PTHREAD_MUTEX_RECURSIVE:
if (--mutex->reent) return 0;
atomic_store_explicit(&mutex->lock, 0, memory_order_relaxed);
if (atomic_load_explicit(&mutex->waits, memory_order_relaxed) > 0) {
_pthread_mutex_wake(mutex);
if ((IsLinux() || IsOpenbsd()) &&
atomic_load_explicit(&mutex->waits, memory_order_relaxed) > 0) {
return _futex_wake(&mutex->lock, 1, mutex->pshared);
}
return 0;
default: