pthread_rwlock_unlock(3P)			     pthread_rwlock_unlock(3P)

NAME    [Toc]    [Back]

     pthread_rwlock_unlock - unlock a read-write lock object

C SYNOPSIS    [Toc]    [Back]

     #include <pthread.h>

     int pthread_rwlock_unlock(pthread_rwlock_t	*rwlock);

DESCRIPTION    [Toc]    [Back]

     Read-write	locks allow a thread to	exclusively lock some shared data
     while updating that data, or allow	any number of threads to have
     simultaneous read-only access to the data.	 The pthread_rwlock_unlock()
     function releases a read or write lock held on the	read-write lock	object
     referenced	by rwlock.  If this function is	called to release a read lock
     and there are other read locks currently held on the lock object, the
     lock object remains in the	read locked state.  If this function is	called
     to	release	the last read or write lock for	this lock object, the lock is
     released.	When released, if there	are both readers and writers of	the
     same priority waiting for the read-write lock, writers will be scheduled
     before readers.

DIAGNOSTICS    [Toc]    [Back]

     This function returns zero.

SEE ALSO    [Toc]    [Back]

     pthread_rwlock_init(3P), pthread_rwlock_rdlock(3P),
     pthread_rwlock_wrlock(3P),	pthread_rwlockattr_init(3P),
     pthread_rwlockattr_setpshared(3P).


									PPPPaaaaggggeeee 1111