nitialize the read-write lock. 
	</DD><DD STYLE="margin-left: 0cm; margin-bottom: 0.5cm">
	<BR><BR>
	</DD></DL>
<P>
The <B>pthread_rwlock_init</B> function may fail if: 
</P>
<DL>
	<DT><B>EINVAL</B> 
	</DT><DD STYLE="margin-bottom: 0.5cm">
	The value specified by <I>attr</I> is invalid. 
	</DD></DL>
<P>
These functions shall not return an error code of [EINTR]. 
</P>
<P><I>The following sections are informative.</I> 
</P>
<H2><A HREF="#toc5" NAME="sect5">Examples</A></H2>
<P>None. 
</P>
<H2><A HREF="#toc6" 