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¶

USE MPI
! or the older form: INCLUDE 'mpif.h'
MPI_MRECV(BUF, COUNT, DATATYPE, MESSAGE, STATUS, IERROR)
	<type>	BUF(*)
	INTEGER	COUNT, DATATYPE, MESSAGE
	INTEGER	STATUS(MPI_STATUS_SIZE), IERROR

Fortran 2008 Syntax¶

USE mpi_f08
MPI_Mrecv(buf, count, datatype, message, status, ierror)
	TYPE(*), DIMENSION(..) :: buf
	INTEGER, INTENT(IN) :: count
	TYPE(MPI_Datatype), INTENT(IN) :: datatype
	TYPE(MPI_Message), INTENT(INOUT) :: message
	TYPE(MPI_Status) :: status
	INTEGER, OPTIONAL, INTENT(OUT) :: 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