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<H2><A NAME="SECTION000816000000000000000">
psb_rcv -- Receive data</A>
</H2>

<P>
<PRE>
call psb_rcv(icontxt, dat, src, m)
</PRE>

<P>
This subroutine receives a packet of data to a destination.
<DL>
<DT><STRONG>Type:</STRONG></DT>
<DD>Synchronous: see usage notes.
</DD>
<DT><STRONG><B>On Entry </B></STRONG></DT>
<DD>
</DD>
<DT><STRONG>icontxt</STRONG></DT>
<DD>the communication context identifying the virtual
  parallel machine.
<BR>
Scope: <B>global</B>.
<BR>
Type: <B>required</B>.
<BR>
Intent: <B>in</B>.
<BR>
Specified as: an integer variable.
</DD>
<DT><STRONG>src</STRONG></DT>
<DD>Source process.
<BR>
Scope: <B>global</B>.
<BR>
Type: <B>required</B>.
<BR>
Intent: <B>in</B>.
<BR>
Specified as: an integer value <!-- MATH
 $0<= src <= np-1$
 -->
<IMG
 WIDTH="147" HEIGHT="30" ALIGN="MIDDLE" BORDER="0"
 SRC="img131.png"
 ALT="$0&lt;= src &lt;= np-1$">. 
<BR></DD>
<DT><STRONG>m</STRONG></DT>
<DD>Number of rows.
<BR>
Scope: <B>global</B>.
<BR>
Type: <B>Optional</B>.
<BR>
Intent: <B>in</B>.
<BR>
Specified as: an integer value <!-- MATH
 $0<= m <= size(dat,1)$
 -->
<IMG
 WIDTH="172" HEIGHT="32" ALIGN="MIDDLE" BORDER="0"
 SRC="img127.png"
 ALT="$0&lt;= m &lt;= size(dat,1)$">. 
<BR>
When <IMG
 WIDTH="26" HEIGHT="14" ALIGN="BOTTOM" BORDER="0"
 SRC="img128.png"
 ALT="$dat$"> is a rank 2 array, specifies the number of rows to be sent
independently of the leading dimension <IMG
 WIDTH="83" HEIGHT="32" ALIGN="MIDDLE" BORDER="0"
 SRC="img129.png"
 ALT="$size(dat,1)$">; must have the
same value on sending and receiving processes.
</DD>
</DL>

<P>
<DL>
<DT><STRONG><B>On Return</B></STRONG></DT>
<DD>
</DD>
<DT><STRONG>dat</STRONG></DT>
<DD>The data to be received.
<BR>
Scope: <B>local</B>.
<BR>
Type: <B>required</B>.
<BR>
Intent: <B>inout</B>.
<BR>
Specified as: an integer, real or complex variable, which may be a
scalar, or a rank 1 or 2 array, or a character or logical scalar.  Type, kind and  rank must agree on sender and receiver process; if <IMG
 WIDTH="18" HEIGHT="13" ALIGN="BOTTOM" BORDER="0"
 SRC="img125.png"
 ALT="$m$"> is
not specified, size must agree as well. 
</DD>
</DL>

<P>
<FONT SIZE="+1"><B>Notes</B></FONT>

<OL>
<LI>This subroutine implies a synchronization, but only between the
  calling process and the source  process <IMG
 WIDTH="26" HEIGHT="13" ALIGN="BOTTOM" BORDER="0"
 SRC="img132.png"
 ALT="$src$">.
</LI>
</OL>

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