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SETSBUF(3PVM)			 PVM Version 3.4		   SETSBUF(3PVM)

NAME
     pvm_setsbuf - Switches the active send buffer.

SYNOPSIS
     C	  int oldbuf = pvm_setsbuf( int bufid )

     Fortran   call pvmfsetsbuf( bufid, oldbuf )

PARAMETERS
     bufid   Integer  the  message  buffer  identifier	for  the new active send
	     buffer.  A value of 0 indicates the default receive buffer.

     oldbuf  Integer returning the message buffer identifier  for  the	previous
	     active send buffer.

DESCRIPTION
     The  routine pvm_setsbuf switches the active send buffer to bufid and saves
     the previous active send buffer oldbuf.  If bufid is  set	to  0  then  the
     present active send buffer is saved and no active send buffer exists.

     The  routine is required when managing multiple message buffers.  For exam-
     ple switching back and forth between two buffers.	One buffer could be used
     to send information to a graphical interface while a second buffer could be
     used send data to other tasks in the application.

EXAMPLES
     C:
	  sbuf1 = pvm_setsbuf( sbuf2 );
     Fortran:
	  CALL PVMFSETSBUF( NEWBUF, OLDBUF )

ERRORS
     These error conditions can be returned by pvm_setsbuf

     PvmBadParam
	    giving an invalid bufid.

     PvmNoSuchBuf
	    switching to a non-existent message buffer.

SEE ALSO
     pvm_setrbuf(3PVM)

				 30 August, 1993		   SETSBUF(3PVM)

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