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libs/ck-libs/ampi/romio/adio/common/ad_fcntl.c

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/* -*- Mode: C; c-basic-offset:4 ; -*- */
/* 
 *
 *   Copyright (C) 2005 University of Chicago. 
 *   See COPYRIGHT notice in top-level directory.
 */

#include "adio.h"

#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif

void ADIOI_GEN_Fcntl(ADIO_File fd, int flag, ADIO_Fcntl_t *fcntl_struct,
             int *error_code)
{
    static char myname[] = "ADIOI_GEN_FCNTL";

    switch(flag) {
    case ADIO_FCNTL_GET_FSIZE:
#ifdef ADIOI_MPE_LOGGING
        MPE_Log_event( ADIOI_MPE_lseek_a, 0, NULL );
#endif
    fcntl_struct->fsize = lseek(fd->fd_sys, 0, SEEK_END);
#ifdef ADIOI_MPE_LOGGING
        MPE_Log_event( ADIOI_MPE_lseek_b, 0, NULL );
#endif
    if (fd->fp_sys_posn != -1) {
#ifdef ADIOI_MPE_LOGGING
             MPE_Log_event( ADIOI_MPE_lseek_a, 0, NULL );
#endif
         lseek(fd->fd_sys, fd->fp_sys_posn, SEEK_SET);
#ifdef ADIOI_MPE_LOGGING
             MPE_Log_event( ADIOI_MPE_lseek_b, 0, NULL );
#endif
        }
    if (fcntl_struct->fsize == -1) {
        *error_code = MPIO_Err_create_code(MPI_SUCCESS,
                           MPIR_ERR_RECOVERABLE, myname,
                           __LINE__, MPI_ERR_IO, "**io",
                           "**io %s", strerror(errno));
    }
    else *error_code = MPI_SUCCESS;
    break;

    case ADIO_FCNTL_SET_DISKSPACE:
    ADIOI_GEN_Prealloc(fd, fcntl_struct->diskspace, error_code);
    break;

    case ADIO_FCNTL_SET_ATOMICITY:
    fd->atomicity = (fcntl_struct->atomicity == 0) ? 0 : 1;
    *error_code = MPI_SUCCESS;
    break;

    /* --BEGIN ERROR HANDLING-- */
    default:
    *error_code = MPIO_Err_create_code(MPI_SUCCESS,
                       MPIR_ERR_RECOVERABLE,
                       myname, __LINE__,
                       MPI_ERR_ARG,
                       "**flag", "**flag %d", flag);
    /* --END ERROR HANDLING-- */
    }
}

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