Unlocks the specified reader-writer lock.
#include <pthread.h>
int pthread_rwlock_unlock (
pthread_rwlock_t *rwlp);
(IN) Points to the reader-writer lock to unlock.
Returns zero.
The pthread_rwlock_unlock function releases the lock. If the function is releasing a reading lock and no one else holds a reading lock on this lock, the lock is placed in an unlocked state. If others still hold reading locks on this lock, the lock remains in a locked state.
If the function is releasing a writing lock, the lock is placed in an unlocked state.