86 строки
2.8 KiB
C
86 строки
2.8 KiB
C
/*
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* Copyright (c) 2004-2007 The Trustees of Indiana University and Indiana
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* University Research and Technology
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* Corporation. All rights reserved.
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* Copyright (c) 2004-2005 The University of Tennessee and The University
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* of Tennessee Research Foundation. All rights
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* reserved.
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* Copyright (c) 2004-2008 High Performance Computing Center Stuttgart,
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* University of Stuttgart. All rights reserved.
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* Copyright (c) 2004-2005 The Regents of the University of California.
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* All rights reserved.
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* Copyright (c) 2006 Cisco Systems, Inc. All rights reserved.
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* $COPYRIGHT$
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*
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* Additional copyrights may follow
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*
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* $HEADER$
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*/
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#include "ompi_config.h"
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#include <stdio.h>
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#include "ompi/mpi/c/bindings.h"
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#include "ompi/request/request.h"
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#include "ompi/request/grequest.h"
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#include "ompi/memchecker.h"
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#if OMPI_HAVE_WEAK_SYMBOLS && OMPI_PROFILING_DEFINES
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#pragma weak MPI_Request_get_status = PMPI_Request_get_status
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#endif
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#if OMPI_PROFILING_DEFINES
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#include "ompi/mpi/c/profile/defines.h"
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#endif
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static const char FUNC_NAME[] = "MPI_Request_get_status";
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/* Non blocking test for the request status. Upon completion, the request will
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* not be freed (unlike the test function). A subsequent call to test, wait
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* or free should be executed on the request.
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*/
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int MPI_Request_get_status(MPI_Request request, int *flag,
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MPI_Status *status)
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{
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MEMCHECKER(
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memchecker_request(&request);
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);
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OPAL_CR_TEST_CHECKPOINT_READY();
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if( MPI_PARAM_CHECK ) {
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OMPI_ERR_INIT_FINALIZE(FUNC_NAME);
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if( (NULL == flag) || (NULL == status) ) {
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return OMPI_ERRHANDLER_INVOKE(MPI_COMM_WORLD, MPI_ERR_ARG, FUNC_NAME);
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} else if (NULL == request) {
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return OMPI_ERRHANDLER_INVOKE(MPI_COMM_WORLD, MPI_ERR_REQUEST,
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FUNC_NAME);
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}
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}
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opal_atomic_mb();
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if( (request == MPI_REQUEST_NULL) || (request->req_state == OMPI_REQUEST_INACTIVE) ) {
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*flag = true;
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if( MPI_STATUS_IGNORE != status ) {
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*status = ompi_status_empty;
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}
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return MPI_SUCCESS;
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}
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if( request->req_complete ) {
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*flag = true;
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/* If this is a generalized request, we *always* have to call
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the query function to get the status (MPI-2:8.2), even if
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the user passed STATUS_IGNORE. */
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if (OMPI_REQUEST_GEN == request->req_type) {
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ompi_grequest_invoke_query(request, &request->req_status);
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}
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if (MPI_STATUS_IGNORE != status) {
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*status = request->req_status;
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}
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return MPI_SUCCESS;
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}
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*flag = false;
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#if OMPI_ENABLE_PROGRESS_THREADS == 0
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opal_progress();
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#endif
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return MPI_SUCCESS;
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}
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