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Make recursive mutexes slightly faster

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Justine Tunney 2024-12-30 01:37:14 -08:00
parent 9ba5b227d9
commit c7e3d9f7ff
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GPG key ID: BE714B4575D6E328
6 changed files with 12 additions and 8 deletions
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5
libc/intrin/pthread_mutex_lock.c
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@ -17,7 +17,6 @@
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/calls/blockcancel.internal.h"
#include "libc/calls/calls.h"
#include "libc/calls/state.internal.h"
#include "libc/cosmo.h"
#include "libc/dce.h"
@ -70,7 +69,7 @@ static errno_t pthread_mutex_lock_recursive(pthread_mutex_t *mutex,
uint64_t word, bool is_trylock) {
uint64_t lock;
int backoff = 0;
int me = gettid();
int me = atomic_load_explicit(&__get_tls()->tib_tid, memory_order_relaxed);
bool once = false;
for (;;) {
if (MUTEX_OWNER(word) == me) {
@ -120,7 +119,7 @@ static errno_t pthread_mutex_lock_recursive(pthread_mutex_t *mutex,
static errno_t pthread_mutex_lock_recursive_nsync(pthread_mutex_t *mutex,
uint64_t word,
bool is_trylock) {
int me = gettid();
int me = atomic_load_explicit(&__get_tls()->tib_tid, memory_order_relaxed);
for (;;) {
if (MUTEX_OWNER(word) == me) {
if (MUTEX_DEPTH(word) < MUTEX_DEPTH_MAX) {