NAME

       MPI_Mrecv - Blocking receive for a matched message

SYNTAX

C Syntax

       #include <mpi.h>
       int MPI_Mrecv(void *buf, int count, MPI_Datatype type,
            MPI_Message *message, MPI_Status *status)

Fortran Syntax

       INCLUDE 'mpif.h'
       MPI_MRECV(BUF, COUNT, DATATYPE, MESSAGE, STATUS, IERROR)
            <type>    BUF(*)
            INTEGER   OUNT, DATATYPE, MESSAGE
            INTEGER   STATUS(MPI_STATUS_SIZE), IERROR

C++ Syntax

       There is no C++ binding for this function.

INPUT PARAMETERS

       count     Number of elements to receive (nonnegative integer).

       datatype  Datatype of each send buffer element (handle).

       message   Message (handle).

OUTPUT PARAMETERS

       buf       Initial address of receive buffer (choice).

       status    Status object (status).

       IERROR    Fortran only: Error status (integer).

DESCRIPTION

       The  functions  MPI_Mrecv and MPI_Imrecv receive messages that have been previously matched by a matching
       probe.

       If MPI_Mrecv is called with MPI_MESSAGE_NULL as the message argument, the call returns  immediately  with
       the  status  object set to source = MPI_PROC_NULL, tag = MPI_ANY_TAG, and count = 0, as if a receive from
       MPI_PROC_NULL was issued.

NOTE

       This is an MPI-3 function and has no C++ binding.

ERRORS

       Almost all MPI routines return an error value; C routines as  the  value  of  the  function  and  Fortran
       routines in the last argument. C++ functions do not return errors.

       Before  the  error  value  is  returned,  the current MPI error handler is called. By default, this error
       handler aborts the MPI job, except for I/O function  errors.  The  error  handler  may  be  changed  with
       MPI_Comm_set_errhandler; the predefined error handler MPI_ERRORS_RETURN may be used to cause error values
       to be returned. Note that MPI does not guarantee that an MPI program can continue past an error.

SEE ALSO

       MPI_Mprobe
       MPI_Improbe
       MPI_Probe
       MPI_Iprobe
       MPI_Imrecv
       MPI_Cancel