REF="#toc2" NAME="sect2">Description</A></H2>
<P>The <B>pthread_rwlock_destroy</B> function shall destroy the
read-write lock object referenced by <I>rwlock</I> and release any
resources used by the lock. The effect of subsequent use of the lock
is undefined until the lock is reinitialized by another call to
<B>pthread_rwlock_init</B>. An implementation may cause
<B>pthread_rwlock_destroy</B> to set the object referenced by <I>rwlock</I>
to an invalid value. Results are undefined if <B>pthread_rwlock_destro