void acl_fiber_rwlock_wunlock(ACL_FIBER_RWLOCK *lk)
{
ACL_FIBER *fiber;
if (lk->writer == NULL)
acl_msg_fatal("%s(%d), %s: wunlock: not locked",
__FILE__, __LINE__, __FUNCTION__);
lk->writer = NULL;
if (lk->readers != 0)
acl_msg_fatal("%s(%d), %s: wunlock: readers",
__FILE__, __LINE__, __FUNCTION__);
while ((fiber = FIRST_FIBER(&lk->rwaiting)) != NULL) {
acl_ring_detach(&lk->rwaiting);
lk->readers++;
acl_fiber_ready(fiber);
}
if (lk->readers == 0 && (fiber = FIRST_FIBER(&lk->wwaiting)) != NULL) {
acl_ring_detach(&lk->wwaiting);
lk->writer = fiber;
acl_fiber_ready(fiber);
}
}
void acl_fiber_rwlock_runlock(ACL_FIBER_RWLOCK *lk)
{
ACL_FIBER *fiber;
if (--lk->readers == 0 && (fiber = FIRST_FIBER(&lk->wwaiting))) {
acl_ring_detach(&lk->wwaiting);
lk->writer = fiber;
acl_fiber_ready(fiber);
}
}
int acl_fiber_sem_post(ACL_FIBER_SEM *sem)
{
ACL_FIBER *ready;
if (sem->tid != acl_pthread_self())
return -1;
if ((ready = FIRST_FIBER(&sem->waiting)) == NULL) {
sem->num++;
return sem->num;
}
acl_ring_detach(&ready->me);
acl_fiber_ready(ready);
return sem->num;
}
void acl_fiber_mutex_unlock(ACL_FIBER_MUTEX *lk)
{
ACL_FIBER *ready, *curr = acl_fiber_running();
if (lk->owner == NULL)
acl_msg_fatal("%s(%d), %s: qunlock: owner NULL",
__FILE__, __LINE__, __FUNCTION__);
if (lk->owner != curr)
acl_msg_fatal("%s(%d), %s: invalid owner=%p, %p",
__FILE__, __LINE__, __FUNCTION__, lk->owner, curr);
acl_ring_detach(&lk->me);
ready = FIRST_FIBER(&lk->waiting);
if ((lk->owner = ready) != NULL) {
acl_ring_detach(&ready->me);
acl_fiber_ready(ready);
}
}
static int __rlock(ACL_FIBER_RWLOCK *lk, int block)
{
ACL_FIBER *curr;
if (lk->writer == NULL && FIRST_FIBER(&lk->wwaiting) == NULL) {
lk->readers++;
return 1;
}
if (!block)
return 0;
curr = acl_fiber_running();
acl_ring_prepend(&lk->rwaiting, &curr->me);
acl_fiber_switch();
/* if switch to me because other killed me, I should detach myself */
acl_ring_detach(&curr->me);
return 1;
}
