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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* Copyright by the Board of Trustees of the University of Illinois. *
* All rights reserved. *
* *
* This file is part of HDF5. The full HDF5 copyright notice, including *
* terms governing use, modification, and redistribution, is contained in *
* the files COPYING and Copyright.html. COPYING can be found at the root *
* of the source code distribution tree; Copyright.html can be found at the *
* root level of an installed copy of the electronic HDF5 document set and *
* is linked from the top-level documents page. It can also be found at *
* http://hdf.ncsa.uiuc.edu/HDF5/doc/Copyright.html. If you do not have *
* access to either file, you may request a copy from hdfhelp@ncsa.uiuc.edu. *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/*-------------------------------------------------------------------------
*
* Created: H5BT.c
* Mar 9 2005
* Quincey Koziol <koziol@ncsa.uiuc.edu>
*
* Purpose: Tracks blocks of bytes in a file
*
*-------------------------------------------------------------------------
*/
#define H5BT_PACKAGE /*suppress error about including H5BTpkg */
/* Private headers */
#include "H5private.h" /* Generic Functions */
#include "H5BTpkg.h" /* Block tracker */
#include "H5Eprivate.h" /* Error handling */
#include "H5MFprivate.h" /* File memory management */
/* Local macros */
/* v2 B-tree info */
#define H5BT_BT2_NODE_SIZE 512
#define H5BT_BT2_RREC_SIZE(f) (H5F_SIZEOF_ADDR(f) + H5F_SIZEOF_SIZE(f)) /* Offset & length of block tracked */
#define H5BT_BT2_SPLIT_PERC 100
#define H5BT_BT2_MERGE_PERC 40
/* Local typedefs */
/* Local prototypes */
/* Package variables */
/* Declare a free list to manage the H5BT_t struct */
H5FL_DEFINE(H5BT_t);
/* Static variables */
/*-------------------------------------------------------------------------
* Function: H5BT_create
*
* Purpose: Creates a new empty block tracker in the file.
*
* Return: Non-negative on success (with address of new block tracker
* filled in), negative on failure
*
* Programmer: Quincey Koziol
* koziol@ncsa.uiuc.edu
* Mar 10 2005
*
*-------------------------------------------------------------------------
*/
herr_t
H5BT_create(H5F_t *f, hid_t dxpl_id, haddr_t *addr_p)
{
H5BT_t *bt = NULL; /* The new B-tree header information */
herr_t ret_value=SUCCEED;
FUNC_ENTER_NOAPI(H5BT_create, FAIL)
/*
* Check arguments.
*/
HDassert(f);
/*
* Allocate file and memory data structures.
*/
if (NULL==(bt = H5FL_CALLOC(H5BT_t)))
HGOTO_ERROR (H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed for block tracker info")
/* Assign internal information */
bt->cache_info.is_dirty = TRUE;
/* Allocate space for the header on disk */
if (HADDR_UNDEF==(*addr_p=H5MF_alloc(f, H5FD_MEM_BLKTRK, dxpl_id, (hsize_t)H5BT_SIZE(f))))
HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "file allocation failed for block tracker info")
/* Create a B-tree for storing the block info records */
if (H5B2_create(f, dxpl_id, H5B2_BLKTRK, H5BT_BT2_NODE_SIZE, H5BT_BT2_RREC_SIZE(f), H5BT_BT2_SPLIT_PERC, H5BT_BT2_MERGE_PERC, &bt->bt2_addr/*out*/)<0)
HGOTO_ERROR(H5E_BLKTRK, H5E_CANTINIT, FAIL, "can't create B-tree for storing block info")
/* Cache the new B-tree node */
if (H5AC_set(f, dxpl_id, H5AC_BLTR, *addr_p, bt, H5AC__NO_FLAGS_SET) < 0)
HGOTO_ERROR(H5E_BLKTRK, H5E_CANTINIT, FAIL, "can't add block tracker info to cache")
done:
if (ret_value<0) {
if (bt)
(void)H5BT_cache_dest(f,bt);
} /* end if */
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5BT_create() */
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