/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * 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: H5B2int.c * Feb 27 2006 * Quincey Koziol * * Purpose: Internal routines for managing v2 B-trees. * *------------------------------------------------------------------------- */ /****************/ /* Module Setup */ /****************/ #include "H5B2module.h" /* This source code file is part of the H5B2 module */ /***********/ /* Headers */ /***********/ #include "H5private.h" /* Generic Functions */ #include "H5B2pkg.h" /* v2 B-trees */ #include "H5Eprivate.h" /* Error handling */ #include "H5MFprivate.h" /* File memory management */ #include "H5VMprivate.h" /* Vectors and arrays */ /****************/ /* Local Macros */ /****************/ /* Number of records that fit into leaf node */ #define H5B2_NUM_LEAF_REC(n, r) \ (((n) - H5B2_LEAF_PREFIX_SIZE) / (r)) /* Uncomment this macro to enable extra sanity checking */ /* #define H5B2_DEBUG */ /******************/ /* Local Typedefs */ /******************/ /********************/ /* Package Typedefs */ /********************/ /********************/ /* Local Prototypes */ /********************/ /*********************/ /* Package Variables */ /*********************/ /*****************************/ /* Library Private Variables */ /*****************************/ /*******************/ /* Local Variables */ /*******************/ /* Declare a free list to manage the H5B2_hdr_t struct */ H5FL_DEFINE_STATIC(H5B2_hdr_t); /* Declare a free list to manage B-tree node pages to/from disk */ H5FL_BLK_DEFINE_STATIC(node_page); /* Declare a free list to manage the 'size_t' sequence information */ H5FL_SEQ_DEFINE_STATIC(size_t); /* Declare a free list to manage the 'H5B2_node_info_t' sequence information */ H5FL_SEQ_DEFINE(H5B2_node_info_t); /*------------------------------------------------------------------------- * Function: H5B2__hdr_init * * Purpose: Allocate & initialize B-tree header info * * Return: Non-negative on success/Negative on failure * * Programmer: Quincey Koziol * koziol@ncsa.uiuc.edu * Feb 2 2005 * *------------------------------------------------------------------------- */ herr_t H5B2__hdr_init(H5B2_hdr_t *hdr, const H5B2_create_t *cparam, void *ctx_udata, uint16_t depth) { size_t sz_max_nrec; /* Temporary variable for range checking */ unsigned u_max_nrec_size; /* Temporary variable for range checking */ unsigned u; /* Local index variable */ herr_t ret_value = SUCCEED; /* Return value */ FUNC_ENTER_PACKAGE /* * Check arguments. */ HDassert(hdr); HDassert(cparam); HDassert(cparam->cls); HDassert((cparam->cls->crt_context && cparam->cls->dst_context) || (NULL == cparam->cls->crt_context && NULL == cparam->cls->dst_context)); HDassert(cparam->node_size > 0); HDassert(cparam->rrec_size > 0); HDassert(cparam->merge_percent > 0 && cparam->merge_percent <= 100); HDassert(cparam->split_percent > 0 && cparam->split_percent <= 100); HDassert(cparam->merge_percent < (cparam->split_percent / 2)); /* Initialize basic information */ hdr->parent = NULL; hdr->rc = 0; hdr->pending_delete = FALSE; /* Assign dynamic information */ hdr->depth = depth; /* Assign user's information */ hdr->split_percent = cparam->split_percent; hdr->merge_percent = cparam->merge_percent; hdr->node_size = cparam->node_size; hdr->rrec_size = cparam->rrec_size; /* Assign common type information */ hdr->cls = cparam->cls; /* Allocate "page" for node I/O */ if(NULL == (hdr->page = H5FL_BLK_MALLOC(node_page, hdr->node_size))) HGOTO_ERROR(H5E_BTREE, H5E_NOSPACE, FAIL, "memory allocation failed") #ifdef H5_CLEAR_MEMORY HDmemset(hdr->page, 0, hdr->node_size); #endif /* H5_CLEAR_MEMORY */ /* Allocate array of node info structs */ if(NULL == (hdr->node_info = H5FL_SEQ_MALLOC(H5B2_node_info_t, (size_t)(hdr->depth + 1)))) HGOTO_ERROR(H5E_BTREE, H5E_NOSPACE, FAIL, "memory allocation failed") /* Initialize leaf node info */ sz_max_nrec = H5B2_NUM_LEAF_REC(hdr->node_size, hdr->rrec_size); H5_CHECKED_ASSIGN(hdr->node_info[0].max_nrec, unsigned, sz_max_nrec, size_t) hdr->node_info[0].split_nrec = (hdr->node_info[0].max_nrec * hdr->split_percent) / 100; hdr->node_info[0].merge_nrec = (hdr->node_info[0].max_nrec * hdr->merge_percent) / 100; hdr->node_info[0].cum_max_nrec = hdr->node_info[0].max_nrec; hdr->node_info[0].cum_max_nrec_size = 0; if(NULL == (hdr->node_info[0].nat_rec_fac = H5FL_fac_init(hdr->cls->nrec_size * hdr->node_info[0].max_nrec))) HGOTO_ERROR(H5E_BTREE, H5E_CANTINIT, FAIL, "can't create node native key block factory") hdr->node_info[0].node_ptr_fac = NULL; /* Allocate array of pointers to internal node native keys */ /* (uses leaf # of records because its the largest) */ if(NULL == (hdr->nat_off = H5FL_SEQ_MALLOC(size_t, (size_t)hdr->node_info[0].max_nrec))) HGOTO_ERROR(H5E_BTREE, H5E_NOSPACE, FAIL, "memory allocation failed") /* Initialize offsets in native key block */ /* (uses leaf # of records because its the largest) */ for(u = 0; u < hdr->node_info[0].max_nrec; u++) hdr->nat_off[u] = hdr->cls->nrec_size * u; /* Compute size to store # of records in each node */ /* (uses leaf # of records because its the largest) */ u_max_nrec_size = H5VM_limit_enc_size((uint64_t)hdr->node_info[0].max_nrec); H5_CHECKED_ASSIGN(hdr->max_nrec_size, uint8_t, u_max_nrec_size, unsigned) HDassert(hdr->max_nrec_size <= H5B2_SIZEOF_RECORDS_PER_NODE); /* Initialize internal node info */ if(depth > 0) { for(u = 1; u < (unsigned)(depth + 1); u++) { sz_max_nrec = H5B2_NUM_INT_REC(hdr, u); H5_CHECKED_ASSIGN(hdr->node_info[u].max_nrec, unsigned, sz_max_nrec, size_t) HDassert(hdr->node_info[u].max_nrec <= hdr->node_info[u - 1].max_nrec); hdr->node_info[u].split_nrec = (hdr->node_info[u].max_nrec * hdr->split_percent) / 100; hdr->node_info[u].merge_nrec = (hdr->node_info[u].max_nrec * hdr->merge_percent) / 100; hdr->node_info[u].cum_max_nrec = ((hdr->node_info[u].max_nrec + 1) * hdr->node_info[u - 1].cum_max_nrec) + hdr->node_info[u].max_nrec; u_max_nrec_size = H5VM_limit_enc_size((uint64_t)hdr->node_info[u].cum_max_nrec); H5_CHECKED_ASSIGN(hdr->node_info[u].cum_max_nrec_size, uint8_t, u_max_nrec_size, unsigned) if(NULL == (hdr->node_info[u].nat_rec_fac = H5FL_fac_init(hdr->cls->nrec_size * hdr->node_info[u].max_nrec))) HGOTO_ERROR(H5E_BTREE, H5E_CANTINIT, FAIL, "can't create node native key block factory") if(NULL == (hdr->node_info[u].node_ptr_fac = H5FL_fac_init(sizeof(H5B2_node_ptr_t) * (hdr->node_info[u].max_nrec + 1)))) HGOTO_ERROR(H5E_BTREE, H5E_CANTINIT, FAIL, "can't create internal 'branch' node node pointer block factory") } /* end for */ } /* end if */ /* Determine if we are doing SWMR writes. Only enable for data chunks for * now. */ hdr->swmr_write = (H5F_INTENT(hdr->f) & H5F_ACC_SWMR_WRITE) > 0 && (hdr->cls->id == H5B2_CDSET_ID || hdr->cls->id == H5B2_CDSET_FILT_ID); /* Clear the shadowed list pointers */ hdr->shadowed_leaf = NULL; hdr->shadowed_internal = NULL; /* Create the callback context, if the callback exists */ if(hdr->cls->crt_context) if(NULL == (hdr->cb_ctx = (*hdr->cls->crt_context)(ctx_udata))) HGOTO_ERROR(H5E_BTREE, H5E_CANTCREATE, FAIL, "unable to create v2 B-tree client callback context") done: if(ret_value < 0) if(H5B2__hdr_free(hdr) < 0) HDONE_ERROR(H5E_BTREE, H5E_CANTFREE, FAIL, "unable to free shared v2 B-tree info") FUNC_LEAVE_NOAPI(ret_value) } /* end H5B2__hdr_init() */ /*------------------------------------------------------------------------- * Function: H5B2__hdr_alloc * * Purpose: Allocate B-tree header * * Return: Non-negative on success/Negative on failure * * Programmer: Quincey Koziol * koziol@hdfgroup.org * Oct 27 2009 * *------------------------------------------------------------------------- */ H5B2_hdr_t * H5B2__hdr_alloc(H5F_t *f) { H5B2_hdr_t *hdr = NULL; /* v2 B-tree header */ H5B2_hdr_t *ret_value = NULL; /* Return value */ FUNC_ENTER_PACKAGE /* * Check arguments. */ HDassert(f); /* Allocate space for the shared information */ if(NULL == (hdr = H5FL_CALLOC(H5B2_hdr_t))) HGOTO_ERROR(H5E_BTREE, H5E_CANTALLOC, NULL, "memory allocation failed for B-tree header") /* Assign non-zero information */ hdr->f = f; hdr->sizeof_addr = H5F_SIZEOF_ADDR(f); hdr->sizeof_size = H5F_SIZEOF_SIZE(f); hdr->hdr_size = H5B2_HEADER_SIZE_HDR(hdr); hdr->root.addr = HADDR_UNDEF; /* Set return value */ ret_value = hdr; done: FUNC_LEAVE_NOAPI(ret_value) } /* end H5B2__hdr_alloc() */ /*------------------------------------------------------------------------- * Function: H5B2__hdr_create * * Purpose: Create new fractal heap header * * Return: Non-negative on success/Negative on failure * * Programmer: Quincey Koziol * koziol@ncsa.uiuc.edu * Mar 21 2006 * *------------------------------------------------------------------------- */ haddr_t H5B2__hdr_create(H5F_t *f, hid_t dxpl_id, const H5B2_create_t *cparam, void *ctx_udata) { H5B2_hdr_t *hdr = NULL; /* The new v2 B-tree header information */ haddr_t ret_value = HADDR_UNDEF; /* Return value */ FUNC_ENTER_PACKAGE /* * Check arguments. */ HDassert(f); HDassert(cparam); /* Allocate v2 B-tree header */ if(NULL == (hdr = H5B2__hdr_alloc(f))) HGOTO_ERROR(H5E_BTREE, H5E_CANTALLOC, HADDR_UNDEF, "allocation failed for B-tree header") /* Initialize shared B-tree info */ if(H5B2__hdr_init(hdr, cparam, ctx_udata, (uint16_t)0) < 0) HGOTO_ERROR(H5E_BTREE, H5E_CANTINIT, HADDR_UNDEF, "can't create shared B-tree info") /* Allocate space for the header on disk */ if(HADDR_UNDEF == (hdr->addr = H5MF_alloc(f, H5FD_MEM_BTREE, dxpl_id, (hsize_t)hdr->hdr_size))) HGOTO_ERROR(H5E_BTREE, H5E_CANTALLOC, HADDR_UNDEF, "file allocation failed for B-tree header") /* Cache the new B-tree node */ if(H5AC_insert_entry(f, dxpl_id, H5AC_BT2_HDR, hdr->addr, hdr, H5AC__NO_FLAGS_SET) < 0) HGOTO_ERROR(H5E_BTREE, H5E_CANTINSERT, HADDR_UNDEF, "can't add B-tree header to cache") /* Set address of v2 B-tree header to return */ ret_value = hdr->addr; done: if(!H5F_addr_defined(ret_value) && hdr) if(H5B2__hdr_free(hdr) < 0) HDONE_ERROR(H5E_BTREE, H5E_CANTRELEASE, HADDR_UNDEF, "unable to release v2 B-tree header") FUNC_LEAVE_NOAPI(ret_value) } /* end H5B2__hdr_create() */ /*------------------------------------------------------------------------- * Function: H5B2__hdr_incr * * Purpose: Increment reference count on B-tree header * * Return: Non-negative on success/Negative on failure * * Programmer: Quincey Koziol * koziol@hdfgroup.org * Oct 13 2009 * *------------------------------------------------------------------------- */ herr_t H5B2__hdr_incr(H5B2_hdr_t *hdr) { herr_t ret_value = SUCCEED; /* Return value */ FUNC_ENTER_PACKAGE /* Sanity checks */ HDassert(hdr); /* Mark header as un-evictable when a B-tree node is depending on it */ if(hdr->rc == 0) if(H5AC_pin_protected_entry(hdr) < 0) HGOTO_ERROR(H5E_BTREE, H5E_CANTPIN, FAIL, "unable to pin v2 B-tree header") /* Increment reference count on B-tree header */ hdr->rc++; done: FUNC_LEAVE_NOAPI(ret_value) } /* end H5B2__hdr_incr() */ /*------------------------------------------------------------------------- * Function: H5B2__hdr_decr * * Purpose: Decrement reference count on B-tree header * * Return: Non-negative on success/Negative on failure * * Programmer: Quincey Koziol * koziol@hdfgroup.org * Oct 13 2009 * *------------------------------------------------------------------------- */ herr_t H5B2__hdr_decr(H5B2_hdr_t *hdr) { herr_t ret_value = SUCCEED; /* Return value */ FUNC_ENTER_PACKAGE /* Sanity check */ HDassert(hdr); HDassert(hdr->rc > 0); /* Decrement reference count on B-tree header */ hdr->rc--; /* Mark header as evictable again when no nodes depend on it */ if(hdr->rc == 0) if(H5AC_unpin_entry(hdr) < 0) HGOTO_ERROR(H5E_BTREE, H5E_CANTUNPIN, FAIL, "unable to unpin v2 B-tree header") done: FUNC_LEAVE_NOAPI(ret_value) } /* end H5B2__hdr_decr() */ /*------------------------------------------------------------------------- * Function: H5B2__hdr_fuse_incr * * Purpose: Increment file reference count on shared v2 B-tree header * * Return: SUCCEED (Can't fail) * * Programmer: Quincey Koziol * koziol@hdfgroup.org * Oct 27 2009 * *------------------------------------------------------------------------- */ herr_t H5B2__hdr_fuse_incr(H5B2_hdr_t *hdr) { FUNC_ENTER_NOAPI_NOINIT_NOERR /* Sanity check */ HDassert(hdr); /* Increment file reference count on shared header */ hdr->file_rc++; FUNC_LEAVE_NOAPI(SUCCEED) } /* end H5B2__hdr_fuse_incr() */ /*------------------------------------------------------------------------- * Function: H5B2__hdr_fuse_decr * * Purpose: Decrement file reference count on shared v2 B-tree header * * Return: The file's reference count after the decrement. (Can't fail) * * Programmer: Quincey Koziol * koziol@hdfgroup.org * Oct 27 2009 * *------------------------------------------------------------------------- */ size_t H5B2__hdr_fuse_decr(H5B2_hdr_t *hdr) { FUNC_ENTER_NOAPI_NOINIT_NOERR /* Sanity check */ HDassert(hdr); HDassert(hdr->file_rc); /* Decrement file reference count on shared header */ hdr->file_rc--; FUNC_LEAVE_NOAPI(hdr->file_rc) } /* end H5B2__hdr_fuse_decr() */ /*------------------------------------------------------------------------- * Function: H5B2__hdr_dirty * * Purpose: Mark B-tree header as dirty * * Return: Non-negative on success/Negative on failure * * Programmer: Quincey Koziol * koziol@hdfgroup.org * Oct 13 2009 * *------------------------------------------------------------------------- */ herr_t H5B2__hdr_dirty(H5B2_hdr_t *hdr) { herr_t ret_value = SUCCEED; /* Return value */ FUNC_ENTER_PACKAGE /* Sanity check */ HDassert(hdr); /* Mark B-tree header as dirty in cache */ if(H5AC_mark_entry_dirty(hdr) < 0) HGOTO_ERROR(H5E_BTREE, H5E_CANTMARKDIRTY, FAIL, "unable to mark v2 B-tree header as dirty") done: FUNC_LEAVE_NOAPI(ret_value) } /* end H5B2__hdr_dirty() */ /*------------------------------------------------------------------------- * Function: H5B2__hdr_protect * * Purpose: Convenience wrapper around protecting v2 B-tree header * * Return: Non-NULL pointer to header on success/NULL on failure * * Programmer: Quincey Koziol * koziol@hdfgroup.org * Dec 18 2015 * *------------------------------------------------------------------------- */ H5B2_hdr_t * H5B2__hdr_protect(H5F_t *f, hid_t dxpl_id, haddr_t hdr_addr, void *ctx_udata, unsigned flags) { H5B2_hdr_cache_ud_t udata; /* User data for cache callbacks */ H5B2_hdr_t *ret_value = NULL; /* Return value */ FUNC_ENTER_PACKAGE /* Sanity check */ HDassert(f); HDassert(H5F_addr_defined(hdr_addr)); /* only the H5AC__READ_ONLY_FLAG may appear in flags */ HDassert((flags & (unsigned)(~H5AC__READ_ONLY_FLAG)) == 0); /* Set up user data for cache callbacks */ udata.f = f; udata.addr = hdr_addr; udata.ctx_udata = ctx_udata; /* Protect the header */ if(NULL == (ret_value = (H5B2_hdr_t *)H5AC_protect(f, dxpl_id, H5AC_BT2_HDR, hdr_addr, &udata, flags))) HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, NULL, "unable to load v2 B-tree header, address = %llu", (unsigned long long)hdr_addr) ret_value->f = f; /* (Must be set again here, in case the header was already in the cache -QAK) */ done: FUNC_LEAVE_NOAPI(ret_value) } /* end H5B2__hdr_protect() */ /*------------------------------------------------------------------------- * Function: H5B2__hdr_unprotect * * Purpose: Convenience wrapper around unprotecting v2 B-tree header * * Return: Non-negative on success/Negative on failure * * Programmer: Quincey Koziol * koziol@hdfgroup.org * Dec 18 2015 * *------------------------------------------------------------------------- */ herr_t H5B2__hdr_unprotect(H5B2_hdr_t *hdr, hid_t dxpl_id, unsigned cache_flags) { herr_t ret_value = SUCCEED; /* Return value */ FUNC_ENTER_PACKAGE /* Sanity check */ HDassert(hdr); /* Unprotect the header */ if(H5AC_unprotect(hdr->f, dxpl_id, H5AC_BT2_HDR, hdr->addr, hdr, cache_flags) < 0) HGOTO_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, FAIL, "unable to unprotect v2 B-tree header, address = %llu", (unsigned long long)hdr->addr) done: FUNC_LEAVE_NOAPI(ret_value) } /* end H5B2__hdr_unprotect() */ /*------------------------------------------------------------------------- * Function: H5B2__hdr_free * * Purpose: Free B-tree header info * * Return: Non-negative on success/Negative on failure * * Programmer: Quincey Koziol * koziol@ncsa.uiuc.edu * Feb 2 2005 * *------------------------------------------------------------------------- */ herr_t H5B2__hdr_free(H5B2_hdr_t *hdr) { herr_t ret_value = SUCCEED; /* Return value */ FUNC_ENTER_PACKAGE /* Sanity check */ HDassert(hdr); /* Destroy the callback context */ if(hdr->cb_ctx) { if((*hdr->cls->dst_context)(hdr->cb_ctx) < 0) HGOTO_ERROR(H5E_BTREE, H5E_CANTRELEASE, FAIL, "can't destroy v2 B-tree client callback context") hdr->cb_ctx = NULL; } /* end if */ /* Free the B-tree node buffer */ if(hdr->page) hdr->page = H5FL_BLK_FREE(node_page, hdr->page); /* Free the array of offsets into the native key block */ if(hdr->nat_off) hdr->nat_off = H5FL_SEQ_FREE(size_t, hdr->nat_off); /* Release the node info */ if(hdr->node_info) { unsigned u; /* Local index variable */ /* Destroy free list factories */ for(u = 0; u < (unsigned)(hdr->depth + 1); u++) { if(hdr->node_info[u].nat_rec_fac) if(H5FL_fac_term(hdr->node_info[u].nat_rec_fac) < 0) HGOTO_ERROR(H5E_BTREE, H5E_CANTRELEASE, FAIL, "can't destroy node's native record block factory") if(hdr->node_info[u].node_ptr_fac) if(H5FL_fac_term(hdr->node_info[u].node_ptr_fac) < 0) HGOTO_ERROR(H5E_BTREE, H5E_CANTRELEASE, FAIL, "can't destroy node's node pointer block factory") } /* end for */ /* Free the array of node info structs */ hdr->node_info = H5FL_SEQ_FREE(H5B2_node_info_t, hdr->node_info); } /* end if */ /* Release the min & max record info, if set */ if(hdr->min_native_rec) { HDfree(hdr->min_native_rec); hdr->min_native_rec = NULL; } /* end if */ if(hdr->max_native_rec) { HDfree(hdr->max_native_rec); hdr->max_native_rec = NULL; } /* end if */ /* Free B-tree header info */ hdr = H5FL_FREE(H5B2_hdr_t, hdr); done: FUNC_LEAVE_NOAPI(ret_value) } /* end H5B2__hdr_free() */ /*------------------------------------------------------------------------- * Function: H5B2__hdr_delete * * Purpose: Delete a v2 B-tree, starting with the header * * Return: Non-negative on success/Negative on failure * * Programmer: Quincey Koziol * koziol@hdfgroup.org * Oct 15 2009 * *------------------------------------------------------------------------- */ herr_t H5B2__hdr_delete(H5B2_hdr_t *hdr, hid_t dxpl_id) { unsigned cache_flags = H5AC__NO_FLAGS_SET; /* Flags for unprotecting v2 B-tree header */ herr_t ret_value = SUCCEED; /* Return value */ FUNC_ENTER_PACKAGE /* Sanity check */ HDassert(hdr); #ifndef NDEBUG { unsigned hdr_status = 0; /* v2 B-tree header's status in the metadata cache */ /* Check the v2 B-tree header's status in the metadata cache */ if(H5AC_get_entry_status(hdr->f, hdr->addr, &hdr_status) < 0) HGOTO_ERROR(H5E_BTREE, H5E_CANTGET, FAIL, "unable to check metadata cache status for v2 B-tree header") /* Sanity checks on v2 B-tree header */ HDassert(hdr_status & H5AC_ES__IN_CACHE); HDassert(hdr_status & H5AC_ES__IS_PROTECTED); } /* end block */ #endif /* NDEBUG */ /* Delete all nodes in B-tree */ if(H5F_addr_defined(hdr->root.addr)) if(H5B2__delete_node(hdr, dxpl_id, hdr->depth, &hdr->root, hdr, hdr->remove_op, hdr->remove_op_data) < 0) HGOTO_ERROR(H5E_BTREE, H5E_CANTDELETE, FAIL, "unable to delete B-tree nodes") /* Indicate that the heap header should be deleted & file space freed */ cache_flags |= H5AC__DIRTIED_FLAG | H5AC__DELETED_FLAG | H5AC__FREE_FILE_SPACE_FLAG; done: /* Unprotect the header with appropriate flags */ if(H5B2__hdr_unprotect(hdr, dxpl_id, cache_flags) < 0) HDONE_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, FAIL, "unable to release v2 B-tree header") FUNC_LEAVE_NOAPI(ret_value) } /* end H5B2__hdr_delete() */