120 строки
3.6 KiB
C
120 строки
3.6 KiB
C
/* -*- Mode: C; c-basic-offset:4 ; -*- */
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/*
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* $Id: read_allb.c,v 1.7 2002/10/24 15:54:42 gropp Exp $
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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_read_all_begin = PMPI_File_read_all_begin
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#elif defined(HAVE_PRAGMA_HP_SEC_DEF)
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#pragma _HP_SECONDARY_DEF PMPI_File_read_all_begin MPI_File_read_all_begin
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#elif defined(HAVE_PRAGMA_CRI_DUP)
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#pragma _CRI duplicate MPI_File_read_all_begin as PMPI_File_read_all_begin
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/* end of weak pragmas */
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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_read_all_begin - Begin a split collective read using individual file pointer
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Input Parameters:
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. fh - file handle (handle)
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. count - number of elements in buffer (nonnegative integer)
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. datatype - datatype of each buffer element (handle)
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Output Parameters:
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. buf - initial address of buffer (choice)
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.N fortran
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@*/
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int MPI_File_read_all_begin(MPI_File fh, void *buf, int count,
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MPI_Datatype datatype)
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{
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int error_code, datatype_size;
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#ifndef PRINT_ERR_MSG
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static char myname[] = "MPI_FILE_READ_ALL_BEGIN";
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#endif
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MPI_Status status;
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#ifdef PRINT_ERR_MSG
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if ((fh <= (MPI_File) 0) || (fh->cookie != ADIOI_FILE_COOKIE)) {
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FPRINTF(stderr, "MPI_File_read_all_begin: Invalid file handle\n");
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MPI_Abort(MPI_COMM_WORLD, 1);
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}
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#else
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ADIOI_TEST_FILE_HANDLE(fh, myname);
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#endif
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if (count < 0) {
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#ifdef PRINT_ERR_MSG
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FPRINTF(stderr, "MPI_File_read_all_begin: Invalid count argument\n");
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MPI_Abort(MPI_COMM_WORLD, 1);
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#else
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error_code = MPIR_Err_setmsg(MPI_ERR_ARG, MPIR_ERR_COUNT_ARG,
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myname, (char *) 0, (char *) 0);
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return ADIOI_Error(fh, error_code, myname);
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#endif
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}
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if (datatype == MPI_DATATYPE_NULL) {
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#ifdef PRINT_ERR_MSG
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FPRINTF(stderr, "MPI_File_read_all_begin: Invalid datatype\n");
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MPI_Abort(MPI_COMM_WORLD, 1);
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#else
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error_code = MPIR_Err_setmsg(MPI_ERR_TYPE, MPIR_ERR_TYPE_NULL,
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myname, (char *) 0, (char *) 0);
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return ADIOI_Error(fh, error_code, myname);
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#endif
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}
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if (fh->access_mode & MPI_MODE_SEQUENTIAL) {
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#ifdef PRINT_ERR_MSG
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FPRINTF(stderr, "MPI_File_read_all_begin: Can't use this function because file was opened with MPI_MODE_SEQUENTIAL\n");
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MPI_Abort(MPI_COMM_WORLD, 1);
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#else
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error_code = MPIR_Err_setmsg(MPI_ERR_UNSUPPORTED_OPERATION,
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MPIR_ERR_AMODE_SEQ, myname, (char *) 0, (char *) 0);
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return ADIOI_Error(fh, error_code, myname);
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#endif
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}
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if (fh->split_coll_count) {
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#ifdef PRINT_ERR_MSG
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FPRINTF(stderr, "MPI_File_read_all_begin: Only one active split collective I/O operation allowed per file handle\n");
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MPI_Abort(MPI_COMM_WORLD, 1);
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#else
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error_code = MPIR_Err_setmsg(MPI_ERR_IO, MPIR_ERR_MULTIPLE_SPLIT_COLL,
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myname, (char *) 0, (char *) 0);
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return ADIOI_Error(fh, error_code, myname);
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#endif
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}
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fh->split_coll_count = 1;
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MPI_Type_size(datatype, &datatype_size);
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if ((count*datatype_size) % fh->etype_size != 0) {
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#ifdef PRINT_ERR_MSG
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FPRINTF(stderr, "MPI_File_read_all_begin: Only an integral number of etypes can be accessed\n");
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MPI_Abort(MPI_COMM_WORLD, 1);
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#else
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error_code = MPIR_Err_setmsg(MPI_ERR_IO, MPIR_ERR_ETYPE_FRACTIONAL,
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myname, (char *) 0, (char *) 0);
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return ADIOI_Error(fh, error_code, myname);
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#endif
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}
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ADIO_ReadStridedColl(fh, buf, count, datatype, ADIO_INDIVIDUAL,
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0, &status, &error_code);
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return error_code;
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}
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