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openmpi/src/mpi/c/scan.c

71 строка
1.8 KiB
C
Исходник Обычный вид История

/*
* $HEADERS$
*/
#include "ompi_config.h"
#include <stdio.h>
#include "mpi.h"
#include "mpi/c/bindings.h"
#include "mca/coll/coll.h"
#include "errhandler/errhandler.h"
#include "communicator/communicator.h"
#include "op/op.h"
#if OMPI_HAVE_WEAK_SYMBOLS && OMPI_PROFILING_DEFINES
#pragma weak MPI_Scan = PMPI_Scan
#endif
#if OMPI_PROFILING_DEFINES
#include "mpi/c/profile/defines.h"
#endif
static const char FUNC_NAME[] = "MPI_Scan";
int MPI_Scan(void *sendbuf, void *recvbuf, int count,
MPI_Datatype datatype, MPI_Op op, MPI_Comm comm)
{
int err;
if (MPI_PARAM_CHECK) {
err = MPI_SUCCESS;
OMPI_ERR_INIT_FINALIZE(FUNC_NAME);
if (ompi_comm_invalid(comm)) {
return OMPI_ERRHANDLER_INVOKE(MPI_COMM_WORLD, MPI_ERR_COMM,
FUNC_NAME);
}
/* No intercommunicators allowed! (MPI does not define
MPI_SCAN on intercommunicators) */
else if (OMPI_COMM_IS_INTER(comm)) {
err = MPI_ERR_COMM;
}
/* Unrooted operation; checks for all ranks */
else if (MPI_OP_NULL == op) {
err = MPI_ERR_OP;
} else if (ompi_op_is_intrinsic(op) &&
datatype->id < DT_MAX_PREDEFINED &&
-1 == ompi_op_ddt_map[datatype->id]) {
err = MPI_ERR_OP;
} else {
OMPI_CHECK_DATATYPE_FOR_SEND(err, datatype, count);
}
OMPI_ERRHANDLER_CHECK(err, comm, err, FUNC_NAME);
}
/* If everyone supplied count == 0, we can just return */
if (0 == count) {
return MPI_SUCCESS;
}
/* Call the coll component to actually perform the allgather */
err = comm->c_coll.coll_scan(sendbuf, recvbuf, count,
datatype, op, comm);
OMPI_ERRHANDLER_RETURN(err, comm, err, FUNC_NAME);
}