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Kernel: Clean up sys$futex and add support for cross-process futexes

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This commit is contained in:
Idan Horowitz 2022-07-14 01:25:35 +03:00 • committed by Andreas Kling
parent 55c7496200
commit 9db10887a1
9 changed files with 164 additions and 70 deletions
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6
Userland/Libraries/LibC/semaphore.cpp
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@ -83,7 +83,7 @@ int sem_post(sem_t* sem)
// Check if another sem_post() call has handled it already.
if (!(value & POST_WAKES)) [[likely]]
return 0;
int rc = futex_wake(&sem->value, 1);
int rc = futex_wake(&sem->value, 1, false);
VERIFY(rc >= 0);
return 0;
}
@ -145,7 +145,7 @@ int sem_timedwait(sem_t* sem, const struct timespec* abstime)
// Re-evaluate.
continue;
if (going_to_wake) [[unlikely]] {
int rc = futex_wake(&sem->value, count - 1);
int rc = futex_wake(&sem->value, count - 1, false);
VERIFY(rc >= 0);
}
return 0;
@ -162,7 +162,7 @@ int sem_timedwait(sem_t* sem, const struct timespec* abstime)
}
// At this point, we're committed to sleeping.
responsible_for_waking = true;
futex_wait(&sem->value, value, abstime, CLOCK_REALTIME);
futex_wait(&sem->value, value, abstime, CLOCK_REALTIME, false);
// This is the state we will probably see upon being waked:
value = 1;
}