get_posn_sh.c

mpi并行计算的c++代码 可用vc或gcc编译通过 可以用来搭建并行计算试验环境

/* -*- Mode: C; c-basic-offset:4 ; -*- */
/* 
 *
 *   Copyright (C) 1997 University of Chicago. 
 *   See COPYRIGHT notice in top-level directory.
 */

#include "mpioimpl.h"

#ifdef HAVE_WEAK_SYMBOLS

#if defined(HAVE_PRAGMA_WEAK)
#pragma weak MPI_File_get_position_shared = PMPI_File_get_position_shared
#elif defined(HAVE_PRAGMA_HP_SEC_DEF)
#pragma _HP_SECONDARY_DEF PMPI_File_get_position_shared MPI_File_get_position_shared
#elif defined(HAVE_PRAGMA_CRI_DUP)
#pragma _CRI duplicate MPI_File_get_position_shared as PMPI_File_get_position_shared
/* end of weak pragmas */
#endif

/* Include mapping from MPI->PMPI */
#define MPIO_BUILD_PROFILING
#include "mpioprof.h"
#endif

/*@
    MPI_File_get_position_shared - Returns the current position of the 
               shared file pointer in etype units relative to the current view

Input Parameters:
. fh - file handle (handle)

Output Parameters:
. offset - offset of shared file pointer (nonnegative integer)

.N fortran
@*/
int MPI_File_get_position_shared(MPI_File mpi_fh, MPI_Offset *offset)
{
    int error_code;
    ADIO_File fh;
    static char myname[] = "MPI_FILE_GET_POSITION_SHARED";

    MPID_CS_ENTER();
    MPIR_Nest_incr();

    fh = MPIO_File_resolve(mpi_fh);

    /* --BEGIN ERROR HANDLING-- */
    MPIO_CHECK_FILE_HANDLE(fh, myname, error_code);
    MPIO_CHECK_NOT_SEQUENTIAL_MODE(fh, myname, error_code);
    MPIO_CHECK_FS_SUPPORTS_SHARED(fh, myname, error_code);
    /* --END ERROR HANDLING-- */

    ADIOI_TEST_DEFERRED(fh, myname, &error_code);

    ADIO_Get_shared_fp(fh, 0, offset, &error_code);

fn_exit:
    MPIR_Nest_decr();
    MPID_CS_EXIT();

    return error_code;
}