ementation has detected an attempt to destroy the object
	referenced by <I>rwlock</I> while it is locked. 
	</DD><DT>
	<B>EINVAL</B> 
	</DT><DD STYLE="margin-bottom: 0.5cm">
	The value specified by <I>rwlock</I> is invalid. 
	</DD></DL>
<P>
The <B>pthread_rwlock_init</B> function shall fail if: 
</P>
<DL>
	<DT><B>EAGAIN</B> 
	</DT><DD>
	The system lacked the necessary resources (other than memory) to
	initialize another read-write lock. 
	</DD><DT>
	<B>ENOMEM</B> 
	</DT><DD>
	Insufficient memory exists to i