MPI_Rsend − Ready send.
#include
<mpi.h>
int MPI_Rsend(void *buf, int count,
MPI_Datatype datatype, int dest,
int tag, MPI_Comm comm) |
INCLUDE
’mpif.h’
MPI_RSEND(BUF, COUNT, DATATYPE, DEST, TAG, COMM,
IERROR)
<type> |
BUF(*) |
|||
INTEGER |
COUNT, DATATYPE, DEST, TAG, COMM, IERROR |
#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). |
IERROR |
Fortran only: Error status (integer). |
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.
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.