if(NULL == (child_iblock = H5HF_man_iblock_protect(hdr, dxpl_id, iblock->ents[curr_entry].addr, child_nrows, iblock, curr_entry, FALSE, H5AC__NO_FLAGS_SET, &did_protect)))
 
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * Copyright by The HDF Group.                                               *
 * 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://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
 * access to either file, you may request a copy from help@hdfgroup.org.     *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/*-------------------------------------------------------------------------
 *
 * Created:     H5HFhdr.c
 *          Apr 10 2006
 *          Quincey Koziol <koziol@ncsa.uiuc.edu>
 *
 * Purpose:     Heap header routines for fractal heaps.
 *
 *-------------------------------------------------------------------------
 */
/****************/
/* Module Setup */
/****************/
#include "H5HFmodule.h"         /* This source code file is part of the H5HF module */
/***********/
/* Headers */
/***********/
#include "H5private.h"      /* Generic Functions            */
#include "H5Eprivate.h"     /* Error handling           */
#include "H5HFpkg.h"        /* Fractal heaps            */
#include "H5MFprivate.h"    /* File memory management       */
#include "H5VMprivate.h"        /* Vectors and arrays           */
/****************/
/* Local Macros */
/****************/
#ifndef NDEBUG
/* Limit on the size of the max. direct block size */
/* (This is limited to 32-bits currently, because I think it's unlikely to
 *      need to be larger, the 32-bit limit for H5VM_log2_of2(n), and
 *      some offsets/sizes are encoded with a maxiumum of 32-bits  - QAK)