diff options
Diffstat (limited to 'src/H5B2.c')
| -rw-r--r-- | src/H5B2.c | 176 |
1 files changed, 176 insertions, 0 deletions
@@ -69,6 +69,9 @@ static herr_t H5B2_split2(H5F_t *f, hid_t dxpl_id, unsigned depth, H5B2_internal_t *internal, unsigned idx); static herr_t H5B2_redistribute3(H5F_t *f, hid_t dxpl_id, unsigned depth, H5B2_internal_t *internal, unsigned idx); +static herr_t H5B2_iterate_node(H5F_t *f, hid_t dxpl_id, H5RC_t *bt2_shared, + unsigned depth, const H5B2_node_ptr_t *curr_node, H5B2_operator_t op, + void *op_data); /* Package variables */ @@ -1630,3 +1633,176 @@ done: FUNC_LEAVE_NOAPI(ret_value) } /* H5B2_create_internal() */ + +/*------------------------------------------------------------------------- + * Function: H5B2_iterate_node + * + * Purpose: Iterate over all the records from a B-tree node, in "in-order" + * order, making a callback for each record. + * + * If the callback returns non-zero, the iteration breaks out + * without finishing all the records. + * + * Return: Value from callback, non-negative on success, negative on error + * + * Programmer: Quincey Koziol + * koziol@ncsa.uiuc.edu + * Feb 11 2005 + * + *------------------------------------------------------------------------- + */ +herr_t +H5B2_iterate_node(H5F_t *f, hid_t dxpl_id, H5RC_t *bt2_shared, unsigned depth, + const H5B2_node_ptr_t *curr_node, H5B2_operator_t op, void *op_data) +{ + H5B2_shared_t *shared; /* Pointer to B-tree's shared information */ + const H5AC_class_t *curr_node_class=NULL; /* Pointer to current node's class info */ + void *node=NULL; /* Pointers to current node */ + uint8_t *native; /* Pointers to node's native records */ + H5B2_node_ptr_t *node_ptrs=NULL; /* Pointers to node's node pointers */ + unsigned u; /* Local index */ + herr_t ret_value = H5B2_ITER_CONT; + + FUNC_ENTER_NOAPI(H5B2_iterate_node, FAIL) + + /* Check arguments. */ + HDassert(f); + HDassert(bt2_shared); + HDassert(curr_node); + HDassert(op); + + /* Get the pointer to the shared B-tree info */ + shared=H5RC_GET_OBJ(bt2_shared); + HDassert(shared); + + if(depth>0) { + H5B2_internal_t *internal; /* Pointer to internal node */ + + /* Lock the current B-tree node */ + if (NULL == (internal = H5AC_protect(f, dxpl_id, H5AC_BT2_INT, curr_node->addr, &(curr_node->node_nrec), shared, H5AC_WRITE))) + HGOTO_ERROR(H5E_BTREE, H5E_CANTLOAD, FAIL, "unable to load B-tree internal node") + + /* Set up information about current node */ + curr_node_class = H5AC_BT2_INT; + node = internal; + native = internal->int_native; + node_ptrs = internal->node_ptrs; + } /* end if */ + else { + H5B2_leaf_t *leaf; /* Pointer to leaf node */ + + /* Lock the current B-tree node */ + if (NULL == (leaf = H5AC_protect(f, dxpl_id, H5AC_BT2_LEAF, curr_node->addr, &(curr_node->node_nrec), shared, H5AC_WRITE))) + HGOTO_ERROR(H5E_BTREE, H5E_CANTLOAD, FAIL, "unable to load B-tree leaf node") + + /* Set up information about current node */ + curr_node_class = H5AC_BT2_LEAF; + node = leaf; + native = leaf->leaf_native; + } /* end else */ + + /* Iterate through records */ + for(u=0, ret_value; u<curr_node->node_nrec && !ret_value; u++) { + /* Descend into child node, if current node is an internal node */ + if(depth>0) { + if((ret_value = H5B2_iterate_node(f,dxpl_id,bt2_shared,depth-1,&(node_ptrs[u]),op,op_data))<0) + HGOTO_ERROR(H5E_BTREE, H5E_CANTINIT, FAIL, "node iteration failed") + } /* end if */ + + /* Make callback for current record */ + if ((ret_value = (op)(H5B2_NAT_NREC(native,shared,u), op_data)) <0) + HGOTO_ERROR(H5E_BTREE, H5E_CANTINIT, FAIL, "iterator function failed") + } /* end for */ + + /* Descend into last child node, if current node is an internal node */ + if(depth>0) { + if((ret_value = H5B2_iterate_node(f,dxpl_id,bt2_shared,depth-1,&(node_ptrs[u]),op,op_data))<0) + HGOTO_ERROR(H5E_BTREE, H5E_CANTINIT, FAIL, "node iteration failed") + } /* end if */ + +done: + /* Unlock current node */ + if(node) + if (H5AC_unprotect(f, dxpl_id, curr_node_class, curr_node->addr, node, H5AC__NO_FLAGS_SET) < 0) + HDONE_ERROR(H5E_BTREE, H5E_PROTECT, FAIL, "unable to release B-tree node") + + FUNC_LEAVE_NOAPI(ret_value) +} /* H5B2_iterate_node() */ + + +/*------------------------------------------------------------------------- + * Function: H5B2_iterate + * + * Purpose: Iterate over all the records in the B-tree, in "in-order" + * order, making a callback for each record. + * + * If the callback returns non-zero, the iteration breaks out + * without finishing all the records. + * + * Return: Value from callback, non-negative on success, negative on error + * + * Programmer: Quincey Koziol + * koziol@ncsa.uiuc.edu + * Feb 11 2005 + * + *------------------------------------------------------------------------- + */ +herr_t +H5B2_iterate(H5F_t *f, hid_t dxpl_id, const H5B2_class_t *type, haddr_t addr, + H5B2_operator_t op, void *op_data) +{ + H5B2_t *bt2=NULL; /* Pointer to the B-tree header */ + H5RC_t *bt2_shared=NULL; /* Pointer to ref-counter for shared B-tree info */ + hbool_t incr_rc=FALSE; /* Flag to indicate that we've incremented the B-tree's shared info reference count */ + H5B2_shared_t *shared; /* Pointer to B-tree's shared information */ + H5B2_node_ptr_t root_ptr; /* Node pointer info for root node */ + unsigned depth; /* Current depth of the tree */ + herr_t ret_value = SUCCEED; + + FUNC_ENTER_NOAPI(H5B2_iterate, FAIL) + + /* Check arguments. */ + HDassert(f); + HDassert(type); + HDassert(H5F_addr_defined(addr)); + HDassert(op); + + /* Look up the B-tree header */ + if (NULL == (bt2 = H5AC_protect(f, dxpl_id, H5AC_BT2_HDR, addr, type, NULL, H5AC_WRITE))) + HGOTO_ERROR(H5E_BTREE, H5E_CANTLOAD, FAIL, "unable to load B-tree header") + + /* Get the pointer to the shared B-tree info */ + shared=H5RC_GET_OBJ(bt2->shared); + HDassert(shared); + + /* Safely grab pointer to reference counted shared B-tree info, so we can release the B-tree header if necessary */ + bt2_shared=bt2->shared; + H5RC_INC(bt2_shared); + incr_rc=TRUE; + + /* Make copy of the root node pointer */ + root_ptr = bt2->root; + + /* Current depth of the tree */ + depth=bt2->depth; + + /* Release header */ + if (H5AC_unprotect(f, dxpl_id, H5AC_BT2_HDR, addr, bt2, H5AC__NO_FLAGS_SET) < 0) + HGOTO_ERROR(H5E_BTREE, H5E_PROTECT, FAIL, "unable to release B-tree header info") + bt2=NULL; + + /* Iterate through records */ + if(root_ptr.node_nrec>0) { + /* Iterate through nodes */ + if((ret_value=H5B2_iterate_node(f,dxpl_id,bt2_shared,depth,&root_ptr,op,op_data))<0) + HGOTO_ERROR(H5E_BTREE, H5E_CANTINIT, FAIL, "node iteration failed") + } /* end if */ + +done: + /* Check if we need to decrement the reference count for the B-tree's shared info */ + if(incr_rc) + H5RC_DEC(bt2_shared); + + FUNC_LEAVE_NOAPI(ret_value) +} /* H5B2_iterate() */ + |