cc46b65a5e
value could be negative, which is allowed for ssize_t, but not for size_t. This commit was SVN r32700.
148 строки
3.9 KiB
C
148 строки
3.9 KiB
C
/*
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* Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
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* University Research and Technology
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* Corporation. All rights reserved.
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* Copyright (c) 2004-2011 The University of Tennessee and The University
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* of Tennessee Research Foundation. All rights
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* reserved.
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* Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
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* University of Stuttgart. All rights reserved.
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* Copyright (c) 2004-2005 The Regents of the University of California.
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* All rights reserved.
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* Copyright (c) 2008-2014 University of Houston. All rights reserved.
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* $COPYRIGHT$
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*
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* Additional copyrights may follow
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*
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* $HEADER$
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*/
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/* This code is based on the PVFS2 ADIO module in ROMIO
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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 "ompi_config.h"
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#include "fbtl_pvfs2.h"
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#include "mpi.h"
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#include <unistd.h>
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#include "ompi/constants.h"
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#include "ompi/mca/fbtl/fbtl.h"
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ssize_t mca_fbtl_pvfs2_preadv (mca_io_ompio_file_t *fh)
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{
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int i;
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int ret;
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size_t k;
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int merge = 0;
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char *merge_buf = NULL;
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size_t merge_length = 0;
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OMPI_MPI_OFFSET_TYPE merge_offset = 0;
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PVFS_sysresp_io resp_io;
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PVFS_Request file_req;
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PVFS_Request mem_req;
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mca_fs_pvfs2 *pvfs2_fs;
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ssize_t total_bytes_read=0;
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pvfs2_fs = (mca_fs_pvfs2 *)fh->f_fs_ptr;
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if (NULL == fh->f_io_array) {
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return OMPI_ERROR;
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}
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for (i=0 ; i<fh->f_num_of_io_entries ; i++) {
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if (fh->f_num_of_io_entries != i+1) {
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if (((OMPI_MPI_OFFSET_TYPE)fh->f_io_array[i].offset +
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(OPAL_PTRDIFF_TYPE)fh->f_io_array[i].length) ==
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(OMPI_MPI_OFFSET_TYPE)fh->f_io_array[i+1].offset) {
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if (!merge) {
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merge_offset = (OMPI_MPI_OFFSET_TYPE)
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fh->f_io_array[i].offset;
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merge_length = fh->f_io_array[i].length;
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}
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merge_length += fh->f_io_array[i+1].length;
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merge++;
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continue;
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}
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}
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if (merge) {
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merge_buf = malloc (merge_length);
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ret = PVFS_Request_contiguous (merge_length,
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PVFS_BYTE,
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&mem_req);
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if (ret != 0) {
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perror("PVFS_Request_contiguous() error");
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return OMPI_ERROR;
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}
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ret = PVFS_Request_contiguous (merge_length,
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PVFS_BYTE,
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&file_req);
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if (ret != 0) {
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perror("PVFS_Request_contiguous() error");
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return OMPI_ERROR;
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}
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ret = PVFS_sys_read (pvfs2_fs->object_ref,
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file_req,
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merge_offset,
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merge_buf,
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mem_req,
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&(pvfs2_fs->credentials),
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&resp_io);
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if (ret != 0) {
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perror("PVFS_sys_write() error");
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return OMPI_ERROR;
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}
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total_bytes_read += (ssize_t)resp_io.total_completed;
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k = 0;
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while (merge >= 0) {
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memcpy (fh->f_io_array[i-merge].memory_address,
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merge_buf + k,
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fh->f_io_array[i-merge].length);
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k += fh->f_io_array[i-merge].length;
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merge --;
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}
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merge = 0;
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merge_offset = 0;
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merge_length = 0;
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if (NULL != merge_buf) {
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free (merge_buf);
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merge_buf = NULL;
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}
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}
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else {
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ret = PVFS_Request_contiguous (fh->f_io_array[i].length,
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PVFS_BYTE,
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&mem_req);
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if (ret != 0) {
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perror("PVFS_Request_contiguous() error");
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return OMPI_ERROR;
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}
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ret = PVFS_Request_contiguous (fh->f_io_array[i].length,
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PVFS_BYTE,
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&file_req);
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if (ret != 0) {
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perror("PVFS_Request_contiguous() error");
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return OMPI_ERROR;
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}
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ret = PVFS_sys_read (pvfs2_fs->object_ref,
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file_req,
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(OMPI_MPI_OFFSET_TYPE)
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fh ->f_io_array[i].offset,
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fh->f_io_array[i].memory_address,
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mem_req,
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&(pvfs2_fs->credentials),
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&resp_io);
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if (ret != 0) {
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perror("PVFS_sys_write() error");
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return OMPI_ERROR;
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}
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total_bytes_read += (ssize_t)resp_io.total_completed;
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}
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}
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return total_bytes_read;
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}
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