NAME

       pvm_send - Immediately sends the data in the active message buffer.

SYNOPSIS

       C    int info = pvm_send( int tid, int msgtag )

       Fortran   call pvmfsend( tid, msgtag, info )

PARAMETERS

       tid     Integer task identifier of destination process.

       msgtag  Integer message tag supplied by the user.  msgtag should be >= 0.

       info    Integer status code returned by the routine.

DESCRIPTION

       The  routine  pvm_send sends a message stored in the active send buffer to the PVM process
       identified by tid.  msgtag is used to label the content of the message.   If  pvm_send  is
       successful, info will be 0. If some error occurs then info will be < 0.

       The  pvm_send  routine  is  asynchronous.  Computation on the sending processor resumes as
       soon as the message is safely on its way to the receiving processor.  This is in  contrast
       to  synchronous  communication,  during  which  computation on the sending processor halts
       until the matching receive is executed by the receiving processor.

       The PVM model guarantees the following about message order.  If task 1 sends message A  to
       task  2,  then  task  1  sends message B to task 2, message A will arrive at task 2 before
       message B.  Moreover, if both messages arrive  before  task  2  does  a  receive,  then  a
       wildcard receive will always return message A.

       Terminating  a PVM task immediately after sending a message or messages from it may result
       in those messages being lost.  To be sure, always call pvm_exit() before stopping.

EXAMPLES

       C:
            info = pvm_initsend( PvmDataDefault );
            info = pvm_pkint( array, 10, 1 );
            msgtag = 3 ;
            info = pvm_send( tid, msgtag );

       Fortran:
            CALL PVMFINITSEND(PVMRAW, INFO)
            CALL PVMFPACK( REAL8, DATA, 100, 1, INFO )
            CALL PVMFSEND( TID, 3, INFO )

ERRORS

       These error conditions can be returned by pvm_send

       PvmBadParam
              giving an invalid tid or a msgtag.

       PvmSysErr
              pvmd not responding.

       PvmNoBuf
              no active send buffer. Try pvm_initsend() before send.

SEE ALSO

       pvm_initsend(3PVM), pvm_mcast(3PVM), pvm_pack(3PVM), pvm_psend(3PVM), pvm_recv(3PVM)

                                         30 August, 1993                               SEND(3PVM)