80 строки
2.2 KiB
C
80 строки
2.2 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) 2008 Sun Microsystems, 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 "ompi/mpi/c/bindings.h"
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#include "ompi/file/file.h"
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#include "ompi/datatype/datatype.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_File_read_at = PMPI_File_read_at
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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_File_read_at";
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int MPI_File_read_at(MPI_File fh, MPI_Offset offset, void *buf,
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int count, MPI_Datatype datatype, MPI_Status *status)
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{
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int rc;
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MEMCHECKER(
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memchecker_datatype(datatype);
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);
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if (MPI_PARAM_CHECK) {
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rc = MPI_SUCCESS;
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OMPI_ERR_INIT_FINALIZE(FUNC_NAME);
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if (ompi_file_invalid(fh)) {
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fh = MPI_FILE_NULL;
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rc = MPI_ERR_FILE;
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} else if (count < 0) {
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rc = MPI_ERR_COUNT;
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} else {
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OMPI_CHECK_DATATYPE_FOR_RECV(rc, datatype, count);
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}
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OMPI_ERRHANDLER_CHECK(rc, fh, rc, FUNC_NAME);
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}
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OPAL_CR_ENTER_LIBRARY();
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/* Call the back-end io component function */
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switch (fh->f_io_version) {
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case MCA_IO_BASE_V_2_0_0:
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rc = fh->f_io_selected_module.v2_0_0.
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io_module_file_read_at(fh, offset, buf, count, datatype, status);
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break;
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default:
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rc = MPI_ERR_INTERN;
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break;
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}
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/* All done */
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OMPI_ERRHANDLER_RETURN(rc, fh, rc, FUNC_NAME);
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}
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