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Clean up threading code some more

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Justine Tunney 2022-09-13 14:57:38 -07:00
parent 6a3330d7c9
commit 654ceaba7d
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GPG key ID: BE714B4575D6E328
28 changed files with 119 additions and 134 deletions
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36
libc/intrin/pthread_mutex_trylock.c
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@ -16,11 +16,9 @@
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/assert.h"
#include "libc/calls/calls.h"
#include "libc/errno.h"
#include "libc/intrin/atomic.h"
#include "libc/intrin/likely.h"
#include "libc/intrin/weaken.h"
#include "libc/thread/thread.h"
#include "libc/thread/tls.h"
@ -39,10 +37,10 @@
int pthread_mutex_trylock(pthread_mutex_t *mutex) {
int c, d, t;
if (LIKELY(__tls_enabled && //
mutex->_type == PTHREAD_MUTEX_NORMAL && //
mutex->_pshared == PTHREAD_PROCESS_PRIVATE && //
_weaken(nsync_mu_trylock))) {
if (__tls_enabled && //
mutex->_type == PTHREAD_MUTEX_NORMAL && //
mutex->_pshared == PTHREAD_PROCESS_PRIVATE && //
_weaken(nsync_mu_trylock)) {
if (_weaken(nsync_mu_trylock)((nsync_mu *)mutex)) {
return 0;
} else {
@ -58,19 +56,25 @@ int pthread_mutex_trylock(pthread_mutex_t *mutex) {
}
}
c = 0;
t = gettid();
d = 0x10100000 | t;
if (!atomic_compare_exchange_strong_explicit(
&mutex->_lock, &c, d, memory_order_acquire, memory_order_relaxed)) {
if ((c & 0x000fffff) != t || mutex->_type == PTHREAD_MUTEX_ERRORCHECK) {
if (mutex->_owner == t) {
if (mutex->_type != PTHREAD_MUTEX_ERRORCHECK) {
if (mutex->_depth < 255) {
++mutex->_depth;
return 0;
} else {
return EAGAIN;
}
} else {
return EBUSY;
}
if ((c & 0x0ff00000) == 0x0ff00000) {
return EAGAIN;
}
atomic_fetch_add_explicit(&mutex->_lock, 0x00100000, memory_order_relaxed);
}
return 0;
if (!atomic_exchange_explicit(&mutex->_lock, 1, memory_order_acquire)) {
mutex->_depth = 0;
mutex->_owner = t;
return 0;
} else {
return EBUSY;
}
}