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LibC+LibPthread: Use FUTEX_PRIVATE_FLAG in more places
Performance go brrrrr
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3 changed files with 5 additions and 5 deletions
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@ -82,14 +82,14 @@ static ALWAYS_INLINE int futex_wait(uint32_t* userspace_address, uint32_t value,
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if (clockid == CLOCK_REALTIME || clockid == CLOCK_REALTIME_COARSE)
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op |= FUTEX_CLOCK_REALTIME;
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} else {
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op = FUTEX_WAIT;
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op = FUTEX_WAIT | FUTEX_PRIVATE_FLAG;
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}
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return futex(userspace_address, op, value, abstime, nullptr, FUTEX_BITSET_MATCH_ANY);
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}
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static ALWAYS_INLINE int futex_wake(uint32_t* userspace_address, uint32_t count)
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{
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return futex(userspace_address, FUTEX_WAKE, count, NULL, NULL, 0);
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return futex(userspace_address, FUTEX_WAKE | FUTEX_PRIVATE_FLAG, count, NULL, NULL, 0);
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}
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#define PURGE_ALL_VOLATILE 0x1
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@ -127,7 +127,7 @@ int pthread_cond_broadcast(pthread_cond_t* cond)
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pthread_mutex_t* mutex = AK::atomic_load(&cond->mutex, AK::memory_order_relaxed);
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VERIFY(mutex);
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int rc = futex(&cond->value, FUTEX_REQUEUE, 1, nullptr, &mutex->lock, INT_MAX);
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int rc = futex(&cond->value, FUTEX_REQUEUE | FUTEX_PRIVATE_FLAG, 1, nullptr, &mutex->lock, INT_MAX);
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VERIFY(rc >= 0);
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return 0;
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}
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@ -45,7 +45,7 @@ int pthread_once(pthread_once_t* self, void (*callback)(void))
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// anyone.
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break;
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case State::PERFORMING_WITH_WAITERS:
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futex(self, FUTEX_WAKE, INT_MAX, nullptr, nullptr, 0);
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futex_wake(self, INT_MAX);
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break;
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}
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@ -75,7 +75,7 @@ int pthread_once(pthread_once_t* self, void (*callback)(void))
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[[fallthrough]];
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case State::PERFORMING_WITH_WAITERS:
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// Let's wait for it.
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futex(self, FUTEX_WAIT, state2, nullptr, nullptr, 0);
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futex_wait(self, state2, nullptr, 0);
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// We have been woken up, but that might have been due to a signal
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// or something, so we have to reevaluate. We need acquire ordering
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// here for the same reason as above. Hopefully we'll just see
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