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openmpi/ompi/mpi/c/sendrecv_replace.c

127 строки
4.4 KiB
C
Исходник Обычный вид История

/*
* Copyright (c) 2004-2005 The Trustees of Indiana University.
* All rights reserved.
* Copyright (c) 2004-2005 The Trustees of the University of Tennessee.
* All rights reserved.
* Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
* University of Stuttgart. All rights reserved.
* Copyright (c) 2004-2005 The Regents of the University of California.
* All rights reserved.
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*/
#include "ompi_config.h"
#include <stdio.h>
#include "mpi/c/bindings.h"
#include "ompi/datatype/datatype.h"
#include "ompi/datatype/convertor.h"
#include "ompi/mca/pml/pml.h"
#include "ompi/proc/proc.h"
#if OMPI_HAVE_WEAK_SYMBOLS && OMPI_PROFILING_DEFINES
#pragma weak MPI_Sendrecv_replace = PMPI_Sendrecv_replace
#endif
#if OMPI_PROFILING_DEFINES
#include "mpi/c/profile/defines.h"
#endif
static const char FUNC_NAME[] = "MPI_Sendrecv_replace";
int MPI_Sendrecv_replace(void * buf, int count, MPI_Datatype datatype,
int dest, int sendtag, int source, int recvtag,
MPI_Comm comm, MPI_Status *status)
{
int rc;
if ( MPI_PARAM_CHECK ) {
rc = 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);
} else if (count < 0) {
rc = MPI_ERR_COUNT;
} else if (datatype == MPI_DATATYPE_NULL) {
rc = MPI_ERR_TYPE;
} else if (dest != MPI_PROC_NULL && ompi_comm_peer_invalid(comm, dest)) {
rc = MPI_ERR_RANK;
} else if (sendtag < 0 || sendtag > mca_pml.pml_max_tag) {
rc = MPI_ERR_TAG;
} else if (source != MPI_PROC_NULL && source != MPI_ANY_SOURCE && ompi_comm_peer_invalid(comm, source)) {
rc = MPI_ERR_RANK;
} else if (((recvtag < 0) && (recvtag != MPI_ANY_TAG)) || (recvtag > mca_pml.pml_max_tag)) {
rc = MPI_ERR_TAG;
}
OMPI_ERRHANDLER_CHECK(rc, comm, rc, FUNC_NAME);
}
/* simple case */
if ( source == MPI_PROC_NULL || dest == MPI_PROC_NULL || count == 0 ) {
return MPI_Sendrecv(buf,count,datatype,dest,sendtag,buf,count,datatype,source,recvtag,comm,status);
} else {
ompi_convertor_t convertor;
struct iovec iov;
unsigned char recv_data[2048];
size_t packed_size, max_data;
uint32_t iov_count;
int free_after;
ompi_status_public_t recv_status;
ompi_proc_t* proc = ompi_comm_peer_lookup(comm,dest);
if(proc == NULL) {
rc = MPI_ERR_RANK;
OMPI_ERRHANDLER_RETURN(rc, comm, rc, FUNC_NAME);
}
/* initialize convertor to unpack recv buffer */
OBJ_CONSTRUCT(&convertor, ompi_convertor_t);
ompi_convertor_copy_and_prepare_for_recv( proc->proc_convertor, datatype,
count, buf, &convertor );
/* setup a buffer for recv */
ompi_convertor_get_packed_size( &convertor, &packed_size );
if( packed_size > sizeof(recv_data) ) {
iov.iov_base = (caddr_t)malloc(packed_size);
if(iov.iov_base == NULL) {
OMPI_ERRHANDLER_RETURN(OMPI_ERR_OUT_OF_RESOURCE, comm, MPI_ERR_BUFFER, FUNC_NAME);
}
} else {
iov.iov_base = (caddr_t)recv_data;
}
/* recv into temporary buffer */
rc = MPI_Sendrecv( buf, count, datatype, dest, sendtag, iov.iov_base, packed_size,
MPI_BYTE, source, recvtag, comm, &recv_status );
if (rc != MPI_SUCCESS) {
if(packed_size > sizeof(recv_data))
free(iov.iov_base);
OBJ_DESTRUCT(&convertor);
OMPI_ERRHANDLER_RETURN(rc, comm, rc, FUNC_NAME);
}
/* unpack into users buffer */
iov.iov_len = recv_status._count;
iov_count = 1;
max_data = recv_status._count;
ompi_convertor_unpack(&convertor, &iov, &iov_count, &max_data, &free_after);
/* return status to user */
if(status != MPI_STATUS_IGNORE) {
*status = recv_status;
}
/* release resources */
if(packed_size > sizeof(recv_data)) {
free(iov.iov_base);
}
OBJ_DESTRUCT(&convertor);
return MPI_SUCCESS;
}
}