205 строки
6.2 KiB
C
205 строки
6.2 KiB
C
/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil ; -*- */
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/*
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*
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* Copyright (C) 1997 University of Chicago.
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* See COPYRIGHT notice in top-level directory.
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*/
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#include "mpioimpl.h"
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#ifdef HAVE_WEAK_SYMBOLS
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#if defined(HAVE_PRAGMA_WEAK)
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#pragma weak MPI_File_set_view = PMPI_File_set_view
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#elif defined(HAVE_PRAGMA_HP_SEC_DEF)
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#pragma _HP_SECONDARY_DEF PMPI_File_set_view MPI_File_set_view
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#elif defined(HAVE_PRAGMA_CRI_DUP)
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#pragma _CRI duplicate MPI_File_set_view as PMPI_File_set_view
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/* end of weak pragmas */
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#elif defined(HAVE_WEAK_ATTRIBUTE)
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int MPI_File_set_view(MPI_File fh, MPI_Offset disp, MPI_Datatype etype, MPI_Datatype filetype,
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const char *datarep, MPI_Info info) __attribute__((weak,alias("PMPI_File_set_view")));
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#endif
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/* Include mapping from MPI->PMPI */
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#define MPIO_BUILD_PROFILING
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#include "mpioprof.h"
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#endif
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/*@
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MPI_File_set_view - Sets the file view
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Input Parameters:
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. fh - file handle (handle)
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. disp - displacement (nonnegative integer)
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. etype - elementary datatype (handle)
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. filetype - filetype (handle)
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. datarep - data representation (string)
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. info - info object (handle)
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.N fortran
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@*/
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int MPI_File_set_view(MPI_File fh, MPI_Offset disp, MPI_Datatype etype,
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MPI_Datatype filetype, ROMIO_CONST char *datarep, MPI_Info info)
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{
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int error_code;
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MPI_Count filetype_size, etype_size;
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static char myname[] = "MPI_FILE_SET_VIEW";
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ADIO_Offset shared_fp, byte_off;
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ADIO_File adio_fh;
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MPIU_THREAD_CS_ENTER(ALLFUNC,);
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adio_fh = MPIO_File_resolve(fh);
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/* --BEGIN ERROR HANDLING-- */
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MPIO_CHECK_FILE_HANDLE(adio_fh, myname, error_code);
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if ((disp < 0) && (disp != MPI_DISPLACEMENT_CURRENT))
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{
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error_code = MPIO_Err_create_code(MPI_SUCCESS, MPIR_ERR_RECOVERABLE,
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myname, __LINE__, MPI_ERR_ARG,
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"**iobaddisp", 0);
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error_code = MPIO_Err_return_file(adio_fh, error_code);
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goto fn_exit;
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}
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/* rudimentary checks for incorrect etype/filetype.*/
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if (etype == MPI_DATATYPE_NULL) {
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error_code = MPIO_Err_create_code(MPI_SUCCESS, MPIR_ERR_RECOVERABLE,
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myname, __LINE__, MPI_ERR_ARG,
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"**ioetype", 0);
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error_code = MPIO_Err_return_file(adio_fh, error_code);
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goto fn_exit;
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}
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MPIO_DATATYPE_ISCOMMITTED(etype, error_code);
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if (error_code != MPI_SUCCESS) {
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error_code = MPIO_Err_return_file(adio_fh, error_code);
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goto fn_exit;
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}
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if (filetype == MPI_DATATYPE_NULL) {
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error_code = MPIO_Err_create_code(MPI_SUCCESS, MPIR_ERR_RECOVERABLE,
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myname, __LINE__, MPI_ERR_ARG,
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"**iofiletype", 0);
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error_code = MPIO_Err_return_file(adio_fh, error_code);
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goto fn_exit;
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}
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MPIO_DATATYPE_ISCOMMITTED(filetype, error_code);
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if (error_code != MPI_SUCCESS) {
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error_code = MPIO_Err_return_file(adio_fh, error_code);
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goto fn_exit;
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}
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if ((adio_fh->access_mode & MPI_MODE_SEQUENTIAL) &&
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(disp != MPI_DISPLACEMENT_CURRENT))
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{
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error_code = MPIO_Err_create_code(MPI_SUCCESS, MPIR_ERR_RECOVERABLE,
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myname, __LINE__, MPI_ERR_ARG,
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"**iodispifseq", 0);
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error_code = MPIO_Err_return_file(adio_fh, error_code);
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goto fn_exit;
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}
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if ((disp == MPI_DISPLACEMENT_CURRENT) &&
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!(adio_fh->access_mode & MPI_MODE_SEQUENTIAL))
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{
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error_code = MPIO_Err_create_code(MPI_SUCCESS, MPIR_ERR_RECOVERABLE,
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myname, __LINE__, MPI_ERR_ARG,
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"**iodispifseq", 0);
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error_code = MPIO_Err_return_file(adio_fh, error_code);
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goto fn_exit;
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}
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MPIO_CHECK_INFO_ALL(info, error_code, adio_fh->comm);
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/* --END ERROR HANDLING-- */
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MPI_Type_size_x(filetype, &filetype_size);
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MPI_Type_size_x(etype, &etype_size);
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/* --BEGIN ERROR HANDLING-- */
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if (etype_size != 0 && filetype_size % etype_size != 0)
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{
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error_code = MPIO_Err_create_code(MPI_SUCCESS, MPIR_ERR_RECOVERABLE,
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myname, __LINE__, MPI_ERR_ARG,
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"**iofiletype", 0);
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error_code = MPIO_Err_return_file(adio_fh, error_code);
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goto fn_exit;
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}
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if ((datarep == NULL) || (strcmp(datarep, "native") &&
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strcmp(datarep, "NATIVE") &&
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strcmp(datarep, "external32") &&
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strcmp(datarep, "EXTERNAL32") &&
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strcmp(datarep, "internal") &&
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strcmp(datarep, "INTERNAL")) )
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{
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error_code = MPIO_Err_create_code(MPI_SUCCESS, MPIR_ERR_RECOVERABLE,
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myname, __LINE__,
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MPI_ERR_UNSUPPORTED_DATAREP,
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"**unsupporteddatarep",0);
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error_code = MPIO_Err_return_file(adio_fh, error_code);
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goto fn_exit;
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}
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/* --END ERROR HANDLING-- */
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if (disp == MPI_DISPLACEMENT_CURRENT) {
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MPI_Barrier(adio_fh->comm);
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ADIO_Get_shared_fp(adio_fh, 0, &shared_fp, &error_code);
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/* TODO: check error code */
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MPI_Barrier(adio_fh->comm);
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ADIOI_Get_byte_offset(adio_fh, shared_fp, &byte_off);
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/* TODO: check error code */
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disp = byte_off;
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}
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ADIO_Set_view(adio_fh, disp, etype, filetype, info, &error_code);
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/* --BEGIN ERROR HANDLING-- */
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if (error_code != MPI_SUCCESS) {
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error_code = MPIO_Err_return_file(adio_fh, error_code);
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goto fn_exit;
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}
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/* --END ERROR HANDLING-- */
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/* reset shared file pointer to zero */
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if (ADIO_Feature(adio_fh, ADIO_SHARED_FP) &&
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(adio_fh->shared_fp_fd != ADIO_FILE_NULL))
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{
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/* only one process needs to set it to zero, but I don't want to
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create the shared-file-pointer file if shared file pointers have
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not been used so far. Therefore, every process that has already
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opened the shared-file-pointer file sets the shared file pointer
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to zero. If the file was not opened, the value is automatically
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zero. Note that shared file pointer is stored as no. of etypes
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relative to the current view, whereas indiv. file pointer is
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stored in bytes. */
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ADIO_Set_shared_fp(adio_fh, 0, &error_code);
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/* --BEGIN ERROR HANDLING-- */
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if (error_code != MPI_SUCCESS)
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error_code = MPIO_Err_return_file(adio_fh, error_code);
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/* --END ERROR HANDLING-- */
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}
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if (ADIO_Feature(adio_fh, ADIO_SHARED_FP))
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{
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MPI_Barrier(adio_fh->comm); /* for above to work correctly */
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}
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if (strcmp(datarep, "external32") && strcmp(datarep, "EXTERNAL32"))
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adio_fh->is_external32 = 0;
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else
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adio_fh->is_external32 = 1;
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fn_exit:
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MPIU_THREAD_CS_EXIT(ALLFUNC,);
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return error_code;
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fn_fail:
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/* --BEGIN ERROR HANDLING-- */
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error_code = MPIO_Err_return_file(fh, error_code);
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goto fn_exit;
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/* --END ERROR HANDLING-- */
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}
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