mirror of
https://github.com/RGBCube/serenity
synced 2025-07-25 18:57:45 +00:00
LibPthread: Ensure we're not overflowing the semaphore's value
This commit is contained in:
parent
62ced35346
commit
98403eccb0
2 changed files with 18 additions and 2 deletions
|
@ -48,8 +48,15 @@ int sem_getvalue(sem_t*, int*)
|
|||
|
||||
int sem_init(sem_t* sem, int shared, unsigned int value)
|
||||
{
|
||||
if (shared)
|
||||
return ENOSYS;
|
||||
if (shared) {
|
||||
errno = ENOSYS;
|
||||
return -1;
|
||||
}
|
||||
|
||||
if (value > SEM_VALUE_MAX) {
|
||||
errno = EINVAL;
|
||||
return -1;
|
||||
}
|
||||
|
||||
if (pthread_mutex_init(&sem->mtx, nullptr) != 0)
|
||||
return -1;
|
||||
|
@ -70,6 +77,12 @@ sem_t* sem_open(const char*, int, ...)
|
|||
|
||||
int sem_post(sem_t* sem)
|
||||
{
|
||||
if (sem->value == SEM_VALUE_MAX) {
|
||||
pthread_mutex_unlock(&sem->mtx);
|
||||
errno = EOVERFLOW;
|
||||
return -1;
|
||||
}
|
||||
|
||||
sem->value++;
|
||||
|
||||
pthread_cond_signal(&sem->cv);
|
||||
|
|
Loading…
Add table
Add a link
Reference in a new issue