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/*
* Copyright (C) by Argonne National Laboratory
* See COPYRIGHT in top-level directory
*/
#include "ad_panfs.h"
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
void ADIOI_PANFS_ReadContig(ADIO_File fd, void *buf, int count,
MPI_Datatype datatype, int file_ptr_type,
ADIO_Offset offset, ADIO_Status * status, int *error_code)
{
MPI_Count err = -1, datatype_size, len;
static char myname[] = "ADIOI_PANFS_READCONTIG";
if (count == 0) {
err = 0;
goto fn_exit;
}
MPI_Type_size_x(datatype, &datatype_size);
len = datatype_size * count;
if (file_ptr_type == ADIO_INDIVIDUAL) {
offset = fd->fp_ind;
}
if (fd->fp_sys_posn != offset) {
err = lseek(fd->fd_sys, offset, SEEK_SET);
/* --BEGIN ERROR HANDLING-- */
if (err == -1) {
*error_code = MPIO_Err_create_code(MPI_SUCCESS,
MPIR_ERR_RECOVERABLE,
myname, __LINE__,
MPI_ERR_IO, "**io", "**io %s", strerror(errno));
fd->fp_sys_posn = -1;
return;
}
/* --END ERROR HANDLING-- */
}
AD_PANFS_RETRY(read(fd->fd_sys, buf, len), err)
/* --BEGIN ERROR HANDLING-- */
if (err == -1) {
*error_code = MPIO_Err_create_code(MPI_SUCCESS,
MPIR_ERR_RECOVERABLE,
myname, __LINE__,
MPI_ERR_IO, "**io", "**io %s", strerror(errno));
fd->fp_sys_posn = -1;
return;
}
/* --END ERROR HANDLING-- */
fd->fp_sys_posn = offset + err;
if (file_ptr_type == ADIO_INDIVIDUAL) {
fd->fp_ind += err;
}
fn_exit:
#ifdef HAVE_STATUS_SET_BYTES
if (status && err != -1)
MPIR_Status_set_bytes(status, datatype, err);
#endif
*error_code = MPI_SUCCESS;
}
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