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LibC: Implement sem_timedwait

This commit is contained in:
Bananymous 2026-01-06 15:51:18 +02:00
parent 4b5a8196c3
commit 7667fe6ca5
1 changed files with 8 additions and 3 deletions
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11
userspace/libraries/LibC/semaphore.cpp
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@ -43,7 +43,7 @@ int sem_trywait(sem_t* sem)
return -1;
}
int sem_wait(sem_t* sem)
int sem_timedwait(sem_t* __restrict sem, const struct timespec* __restrict abstime)
{
for (;;)
{
@ -51,8 +51,13 @@ int sem_wait(sem_t* sem)
if (expected > 0 && BAN::atomic_compare_exchange(sem->value, expected, expected - 1))
return 0;
const int op = FUTEX_WAIT | (sem->shared ? 0 : FUTEX_PRIVATE);
if (futex(op, &sem->value, expected, nullptr) == -1 && errno == EINTR)
const int op = FUTEX_WAIT | (sem->shared ? 0 : FUTEX_PRIVATE) | FUTEX_REALTIME;
if (futex(op, &sem->value, expected, abstime) == -1 && (errno == EINTR || errno == ETIMEDOUT))
return -1;
}
}
int sem_wait(sem_t* sem)
{
return sem_timedwait(sem, nullptr);
}