diff options
Diffstat (limited to 'src/H5B2test.c')
| -rw-r--r-- | src/H5B2test.c | 181 |
1 files changed, 180 insertions, 1 deletions
diff --git a/src/H5B2test.c b/src/H5B2test.c index 1844e75..3ba4a34 100644 --- a/src/H5B2test.c +++ b/src/H5B2test.c @@ -239,7 +239,7 @@ H5B2_test_debug(FILE *stream, const H5F_t UNUSED *f, hid_t UNUSED dxpl_id, /*------------------------------------------------------------------------- - * Function: H5B2_get_root_addr + * Function: H5B2_get_root_addr_test * * Purpose: Retrieve the root node's address * @@ -282,3 +282,182 @@ done: FUNC_LEAVE_NOAPI(ret_value) } /* H5B2_get_root_addr_test() */ + +/*------------------------------------------------------------------------- + * Function: H5B2_get_node_info_test + * + * Purpose: Determine information about a node holding a record in the B-tree + * + * Return: Success: non-negative + * Failure: negative + * + * Programmer: Quincey Koziol + * Thursday, August 31, 2006 + * + *------------------------------------------------------------------------- + */ +herr_t +H5B2_get_node_info_test(H5F_t *f, hid_t dxpl_id, const H5B2_class_t *type, haddr_t addr, + void *udata, H5B2_node_info_test_t *ninfo) +{ + H5B2_t *bt2=NULL; /* Pointer to the B-tree header */ + H5RC_t *bt2_shared=NULL; /* Pointer to ref-counter for shared B-tree info */ + H5B2_shared_t *shared; /* Pointer to B-tree's shared information */ + hbool_t incr_rc=FALSE; /* Flag to indicate that we've incremented the B-tree's shared info reference count */ + H5B2_node_ptr_t curr_node_ptr; /* Node pointer info for current node */ + unsigned depth; /* Current depth of the tree */ + int cmp; /* Comparison value of records */ + unsigned idx; /* Location of record which matches key */ + herr_t ret_value = SUCCEED; /* Return value */ + + FUNC_ENTER_NOAPI(H5B2_get_node_info_test, FAIL) + + /* Check arguments. */ + HDassert(f); + HDassert(type); + HDassert(H5F_addr_defined(addr)); + + /* Look up the B-tree header */ + if (NULL == (bt2 = H5AC_protect(f, dxpl_id, H5AC_BT2_HDR, addr, type, NULL, H5AC_READ))) + HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, FAIL, "unable to load B-tree header") + + /* 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 to start search with */ + curr_node_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_CANTUNPROTECT, FAIL, "unable to release B-tree header info") + bt2 = NULL; + + /* Get the pointer to the shared B-tree info */ + shared = H5RC_GET_OBJ(bt2_shared); + HDassert(shared); + + /* Check for empty tree */ + if(curr_node_ptr.node_nrec==0) + HGOTO_ERROR(H5E_BTREE, H5E_NOTFOUND, FAIL, "B-tree has no records") + + /* Walk down B-tree to find record or leaf node where record is located */ + cmp = -1; + while(depth > 0 && cmp != 0) { + H5B2_internal_t *internal; /* Pointer to internal node in B-tree */ + H5B2_node_ptr_t next_node_ptr; /* Node pointer info for next node */ + + /* Lock B-tree current node */ + if(NULL == (internal = H5B2_protect_internal(f, dxpl_id, bt2_shared, curr_node_ptr.addr, curr_node_ptr.node_nrec, depth, H5AC_READ))) + HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, FAIL, "unable to load B-tree internal node") + + /* Locate node pointer for child */ + cmp = H5B2_locate_record(shared->type, internal->nrec, shared->nat_off, internal->int_native, udata, &idx); + if(cmp > 0) + idx++; + + if(cmp != 0) { + /* Get node pointer for next node to search */ + next_node_ptr = internal->node_ptrs[idx]; + + /* Unlock current node */ + if(H5AC_unprotect(f, dxpl_id, H5AC_BT2_INT, curr_node_ptr.addr, internal, H5AC__NO_FLAGS_SET) < 0) + HGOTO_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, FAIL, "unable to release B-tree node") + + /* Set pointer to next node to load */ + curr_node_ptr = next_node_ptr; + } /* end if */ + else { + /* Unlock current node */ + if(H5AC_unprotect(f, dxpl_id, H5AC_BT2_INT, curr_node_ptr.addr, internal, H5AC__NO_FLAGS_SET) < 0) + HGOTO_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, FAIL, "unable to release B-tree node") + + /* Fill in information about the node */ + ninfo->depth = depth; + ninfo->nrec = curr_node_ptr.node_nrec; + + /* Indicate success */ + HGOTO_DONE(SUCCEED) + } /* end else */ + + /* Decrement depth we're at in B-tree */ + depth--; + } /* end while */ + + { + H5B2_leaf_t *leaf; /* Pointer to leaf node in B-tree */ + + /* Lock B-tree leaf node */ + if(NULL == (leaf = H5AC_protect(f, dxpl_id, H5AC_BT2_LEAF, curr_node_ptr.addr, &(curr_node_ptr.node_nrec), bt2_shared, H5AC_READ))) + HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, FAIL, "unable to load B-tree internal node") + + /* Locate record */ + cmp = H5B2_locate_record(shared->type, leaf->nrec, shared->nat_off, leaf->leaf_native, udata, &idx); + + /* Unlock current node */ + if(H5AC_unprotect(f, dxpl_id, H5AC_BT2_LEAF, curr_node_ptr.addr, leaf, H5AC__NO_FLAGS_SET) < 0) + HGOTO_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, FAIL, "unable to release B-tree node") + + /* Indicate the depth that the record was found */ + if(cmp != 0) + HGOTO_ERROR(H5E_BTREE, H5E_NOTFOUND, FAIL, "record not in B-tree") + } /* end block */ + + /* Fill in information about the leaf node */ + ninfo->depth = depth; + ninfo->nrec = curr_node_ptr.node_nrec; + +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_get_node_info_test() */ + + +/*------------------------------------------------------------------------- + * Function: H5B2_get_node_depth_test + * + * Purpose: Determine the depth of a node holding a record in the B-tree + * + * Note: Just a simple wrapper around the H5B2_get_node_info_test() routine + * + * Return: Success: non-negative depth of the node where the record + * was found + * Failure: negative + * + * Programmer: Quincey Koziol + * Saturday, August 26, 2006 + * + *------------------------------------------------------------------------- + */ +int +H5B2_get_node_depth_test(H5F_t *f, hid_t dxpl_id, const H5B2_class_t *type, haddr_t addr, + void *udata) +{ + H5B2_node_info_test_t ninfo; /* Node information */ + int ret_value; /* Return information */ + + FUNC_ENTER_NOAPI(H5B2_get_node_depth_test, FAIL) + + /* Check arguments. */ + HDassert(f); + HDassert(type); + HDassert(H5F_addr_defined(addr)); + + /* Get information abou the node */ + if(H5B2_get_node_info_test(f, dxpl_id, type, addr, udata, &ninfo) < 0) + HGOTO_ERROR(H5E_BTREE, H5E_NOTFOUND, FAIL, "error looking up node info") + + /* Set return value */ + ret_value = ninfo.depth; + +done: + FUNC_LEAVE_NOAPI(ret_value) +} /* H5B2_get_node_depth_test() */ + |