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MPI_Recv_init - Builds a handle for a receive.
#include <mpi.h>
int MPI_Recv_init(void *buf, int count, MPI_Datatype datatype,
int source, int tag, MPI_Comm comm, MPI_Request *request)
USE MPI
! or the older form: INCLUDE ’mpif.h’
MPI_RECV_INIT(BUF, COUNT, DATATYPE, SOURCE, TAG, COMM, REQUEST,
IERROR)
<type> BUF(*)
INTEGER COUNT, DATATYPE, SOURCE, TAG, COMM, REQUEST, IERROR
USE mpi_f08
MPI_Recv_init(buf, count, datatype, source, tag, comm, request, ierror)
TYPE(*), DIMENSION(..), ASYNCHRONOUS :: buf
INTEGER, INTENT(IN) :: count, source, tag
TYPE(MPI_Datatype), INTENT(IN) :: datatype
TYPE(MPI_Comm), INTENT(IN) :: comm
TYPE(MPI_Request), INTENT(OUT) :: request
INTEGER, OPTIONAL, INTENT(OUT) :: ierror
- count
- Maximum number of elements to receive (integer).
- datatype
- Type of each entry (handle).
- source
- Rank of source (integer).
- tag
- Message
tag (integer).
- comm
- Communicator (handle).
- buf
- Initial
address of receive buffer (choice).
- request
- Communication
request (handle).
- IERROR
- Fortran only: Error status (integer).
Creates
a persistent communication request for a receive operation. The argument
buf is marked as OUT because the user gives permission to write on the
receive buffer by passing the argument to MPI_Recv_init.
A persistent communication
request is inactive after it is created -- no active communication is attached
to the request.
A communication (send or receive) that uses a persistent
request is initiated by the function MPI_Start or MPI_Startall.
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. If the default error handler is set to MPI::ERRORS_THROW_EXCEPTIONS,
then on error the C++ exception mechanism will be used to throw an MPI::Exception
object.
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.
MPI_Bsend_init
MPI_Rsend_init
MPI_Send_init
MPI_Sssend_init
MPI_Start
MPI_Startall
MPI_Request_free
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