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 example 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)