MPI_RECV(3)MPI_RECV(3)NAMEMPI_Recv - Provides a basic receive operation
SYNOPSIS
C:
#include <mpi.h>
int MPI_Recv( buf, count, datatype, source,
tag, comm, status )
void *buf;
int count, source, tag;
MPI_Datatype datatype;
MPI_Comm comm;
MPI_Status *status;
C++:
#include <mpi.h>
void Comm::Recv(
void* buf,
int count,
const Datatype& datatype,
int source,
int tag) const
Fortran:
INCLUDE "mpif.h" (or USE MPI)
<type> BUF(*)
INTEGER count, datatype, source, tag, comm,
status(MPI_STATUS_SIZE), ierror
CALL MPI_RECV(buf, count, datatype, source, tag, comm,
status(MPI_STATUS_SIZE), ierror)
STANDARDS
This release implements the MPI 1.2 standard, as documented by the MPI
Forum in the spring 1997 release of MPI: A Message Passing Interface
Standard.
DESCRIPTION
The MPI_Recv routine provides a basic receive operation. This routine
accepts the following parameters:
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MPI_RECV(3)MPI_RECV(3)
buf Returns the initial address of the receive buffer (choice)
status Returns the status object (status)
count Specifies the maximum number of elements in the receive buffer
(integer)
datatype Specifies the data type of each receive buffer element (handle)
source Specifies the rank of the source (integer)
tag Specifies the message tag (integer)
comm Specifies the communicator (handle)
ierror Specifies the return code value for successful completion,
which is in MPI_SUCCESS. MPI_SUCCESS is defined in the mpif.h
file.
NOTES
The count parameter indicates the maximum length of a message; you can
determine the actual number by using MPI_Get_count.
All Fortran MPI routines (except for MPI_Wtime(3) and MPI_Wtick(3)) have
an additional ierr argument at the end of the argument list. ierr is an
integer and has the same meaning as the return value of the routine in C.
In Fortran, MPI routines are subroutines and are invoked with the CALL
statement. Additionally, all MPI objects (for example, MPI_Datatype and
MPI_Comm) are of type integer.
SEE ALSOMPI_Irecv(3), MPI_Get_count(3), MPI_Wtime(3), MPI_Wtick(3)
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