NAME¶
MPI_Rsend - Ready send.
C Syntax¶
#include <mpi.h>
int MPI_Rsend(const void *buf, int count, MPI_Datatype datatype, int dest,
int tag, MPI_Comm comm)
Fortran Syntax¶
INCLUDE 'mpif.h'
MPI_RSEND(BUF, COUNT, DATATYPE, DEST, TAG, COMM, IERROR)
<type> BUF(*)
INTEGER COUNT, DATATYPE, DEST, TAG, COMM, IERROR
C++ Syntax¶
#include <mpi.h>
void Comm::Rsend(const void* buf, int count, const Datatype&
datatype, int dest, int tag) const
- buf
- Initial address of send buffer (choice).
- count
- Number of elements in send buffer (nonnegative integer).
- datatype
- Datatype of each send buffer element (handle).
- dest
- Rank of destination (integer).
- tag
- Message tag (integer).
- comm
- Communicator (handle).
OUTPUT PARAMETER¶
- IERROR
- Fortran only: Error status (integer).
DESCRIPTION¶
A ready send may only be called if the user can guarantee that a receive is
already posted. It is an error if the receive is not posted before the ready
send is called.
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. 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.