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120 lines
3.6 KiB
C
120 lines
3.6 KiB
C
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
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* Copyright by The HDF Group. *
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* Copyright by the Board of Trustees of the University of Illinois. *
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* All rights reserved. *
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* *
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* This file is part of HDF5. The full HDF5 copyright notice, including *
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* terms governing use, modification, and redistribution, is contained in *
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* the files COPYING and Copyright.html. COPYING can be found at the root *
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* of the source code distribution tree; Copyright.html can be found at the *
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* root level of an installed copy of the electronic HDF5 document set and *
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* is linked from the top-level documents page. It can also be found at *
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* http://hdfgroup.org/HDF5/doc/Copyright.html. If you do not have *
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* access to either file, you may request a copy from help@hdfgroup.org. *
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* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
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/* Programmer: Quincey Koziol <koziol@ncsa.uiuc.edu>
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* Monday, March 6, 2006
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*
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* Purpose: v2 B-tree metadata statistics functions.
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*
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*/
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/****************/
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/* Module Setup */
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/****************/
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#define H5B2_PACKAGE /*suppress error about including H5B2pkg */
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/***********/
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/* Headers */
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/***********/
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#include "H5private.h" /* Generic Functions */
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#include "H5B2pkg.h" /* v2 B-trees */
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#include "H5Eprivate.h" /* Error handling */
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/****************/
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/* Local Macros */
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/****************/
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/******************/
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/* Local Typedefs */
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/******************/
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/********************/
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/* Package Typedefs */
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/********************/
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/********************/
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/* Local Prototypes */
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/********************/
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/*********************/
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/* Package Variables */
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/*********************/
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/*****************************/
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/* Library Private Variables */
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/*****************************/
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/*******************/
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/* Local Variables */
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/*******************/
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/*-------------------------------------------------------------------------
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* Function: H5B2_stat_info
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*
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* Purpose: Retrieve metadata statistics for a v2 B-tree
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*
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* Return: Success: non-negative
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*
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* Failure: negative
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*
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* Programmer: Quincey Koziol
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* Monday, March 6, 2006
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*
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*-------------------------------------------------------------------------
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*/
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herr_t
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H5B2_stat_info(H5F_t *f, hid_t dxpl_id, const H5B2_class_t *type,
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haddr_t addr, H5B2_stat_t *info)
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{
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H5B2_t *bt2 = NULL; /* Pointer to the B-tree header */
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H5B2_shared_t *shared; /* Pointer to B-tree's shared information */
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herr_t ret_value = SUCCEED; /* Return value */
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FUNC_ENTER_NOAPI_NOINIT(H5B2_stat_info)
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/* Check arguments. */
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HDassert(f);
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HDassert(type);
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HDassert(H5F_addr_defined(addr));
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HDassert(info);
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/* Look up the B-tree header */
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if(NULL == (bt2 = (H5B2_t *)H5AC_protect(f, dxpl_id, H5AC_BT2_HDR, addr, type, NULL, H5AC_READ)))
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HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, FAIL, "unable to load B-tree header")
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/* Get pointer to reference counted shared B-tree info */
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shared = (H5B2_shared_t *)H5RC_GET_OBJ(bt2->shared);
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/* Get information about the B-tree */
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info->depth = shared->depth;
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info->nrecords = bt2->root.all_nrec;
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done:
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/* Release B-tree header node */
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if(bt2 && H5AC_unprotect(f, dxpl_id, H5AC_BT2_HDR, addr, bt2, H5AC__NO_FLAGS_SET) < 0)
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HDONE_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, FAIL, "unable to release B-tree header info")
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FUNC_LEAVE_NOAPI(ret_value)
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} /* H5B2_stat_info() */
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