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openmpi/ompi/mpi/c/request_get_status.c

70 строки
2.1 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.h"
#include "mpi/c/bindings.h"
#include "request/request.h"
#include "communicator/communicator.h"
#include "errhandler/errhandler.h"
#if OMPI_HAVE_WEAK_SYMBOLS && OMPI_PROFILING_DEFINES
#pragma weak MPI_Request_get_status = PMPI_Request_get_status
#endif
#if OMPI_PROFILING_DEFINES
#include "mpi/c/profile/defines.h"
#endif
static const char FUNC_NAME[] = "MPI_Request_get_status";
/* Non blocking test for the request status. Upon completion, the request will
* not be freed (unlike the test function). A subsequent call to test, wait
* or free should be executed on the request.
*/
int MPI_Request_get_status(MPI_Request request, int *flag,
MPI_Status *status)
{
if( MPI_PARAM_CHECK ) {
OMPI_ERR_INIT_FINALIZE(FUNC_NAME);
if( (NULL == flag) || (NULL == status) ) {
return OMPI_ERRHANDLER_INVOKE(MPI_COMM_WORLD, MPI_ERR_ARG, FUNC_NAME);
}
}
opal_atomic_mb();
if( (request == MPI_REQUEST_NULL) || (request->req_state == OMPI_REQUEST_INACTIVE) ) {
*flag = true;
if( MPI_STATUS_IGNORE != status ) {
*status = ompi_status_empty;
}
return MPI_SUCCESS;
}
if( request->req_complete ) {
*flag = true;
if (MPI_STATUS_IGNORE != status) {
*status = request->req_status;
}
return MPI_SUCCESS;
}
*flag = false;
#if OMPI_ENABLE_PROGRESS_THREADS == 0
ompi_progress();
#endif
return MPI_SUCCESS;
}