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/*
* %CopyrightBegin%
*
* Copyright Ericsson AB 1998-2016. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* %CopyrightEnd%
*/
#ifndef _DB_TREE_UTIL_H
#define _DB_TREE_UTIL_H
/*
** Internal functions and macros used by both the CA tree and the AVL tree
*/
#if defined(ARCH_32)
/*
** A stack of this size is enough for an AVL tree with more than
** 0xFFFFFFFF elements. May be subject to change if
** the datatype of the element counter is changed to a 64 bit integer.
** The Maximal height of an AVL tree is calculated as:
** h(n) <= 1.4404 * log(n + 2) - 0.328
** Where n denotes the number of nodes, h(n) the height of the tree
** with n nodes and log is the binary logarithm.
*/
#define STACK_NEED 50
#elif defined(ARCH_64)
/*
** A stack of this size is enough for an AVL tree with more than
** 2^61 elements.
** The Maximal height of an AVL tree is calculated as above.
*/
#define STACK_NEED 90
#else
#error "Unsported architecture"
#endif
#define PUSH_NODE(Dtt, Tdt) \
((Dtt)->array[(Dtt)->pos++] = Tdt)
#define POP_NODE(Dtt) \
(((Dtt)->pos) ? \
(Dtt)->array[--((Dtt)->pos)] : NULL)
#define TOP_NODE(Dtt) \
((Dtt->pos) ? \
(Dtt)->array[(Dtt)->pos - 1] : NULL)
#define EMPTY_NODE(Dtt) (TOP_NODE(Dtt) == NULL)
#define DEC_NITEMS(DB) \
erts_flxctr_dec(&(DB)->common.counters, ERTS_DB_TABLE_NITEMS_COUNTER_ID)
static ERTS_INLINE void free_term(DbTable *tb, TreeDbTerm* p)
{
db_free_term(tb, p, offsetof(TreeDbTerm, dbterm));
}
/*
** Some macros for "direction stacks"
*/
#define DIR_LEFT 0
#define DIR_RIGHT 1
#define DIR_END 2
static ERTS_INLINE Sint cmp_key(DbTableCommon* tb, Eterm key, TreeDbTerm* obj) {
return CMP(key, GETKEY(tb,obj->dbterm.tpl));
}
int tree_balance_left(TreeDbTerm **this);
int tree_balance_right(TreeDbTerm **this);
int db_first_tree_common(Process *p, DbTable *tbl, TreeDbTerm *root,
Eterm *ret, DbTableTree *stack_container);
int db_next_tree_common(Process *p, DbTable *tbl,
TreeDbTerm *root, Eterm key,
Eterm *ret, DbTreeStack* stack);
int db_last_tree_common(Process *p, DbTable *tbl, TreeDbTerm *root,
Eterm *ret, DbTableTree *stack_container);
int db_prev_tree_common(Process *p, DbTable *tbl, TreeDbTerm *root, Eterm key,
Eterm *ret, DbTreeStack* stack);
int db_put_tree_common(DbTableCommon *tb, TreeDbTerm **root, Eterm obj,
int key_clash_fail, DbTableTree *stack_container);
int db_get_tree_common(Process *p, DbTableCommon *tb, TreeDbTerm *root, Eterm key,
Eterm *ret, DbTableTree *stack_container);
int db_get_element_tree_common(Process *p, DbTableCommon *tb, TreeDbTerm *root, Eterm key,
int ndex, Eterm *ret, DbTableTree *stack_container);
int db_member_tree_common(DbTableCommon *tb, TreeDbTerm *root, Eterm key, Eterm *ret,
DbTableTree *stack_container);
int db_erase_tree_common(DbTable *tbl, TreeDbTerm **root, Eterm key, Eterm *ret,
DbTreeStack *stack /* NULL if no static stack */);
int db_erase_object_tree_common(DbTable *tbl, TreeDbTerm **root, Eterm object,
Eterm *ret, DbTableTree *stack_container);
int db_slot_tree_common(Process *p, DbTable *tbl, TreeDbTerm *root,
Eterm slot_term, Eterm *ret,
DbTableTree *stack_container,
CATreeRootIterator*);
int db_select_chunk_tree_common(Process *p, DbTable *tb,
Eterm tid, Eterm pattern, Sint chunk_size,
int reverse, Eterm *ret,
DbTableTree *stack_container,
CATreeRootIterator*);
int db_select_tree_common(Process *p, DbTable *tb,
Eterm tid, Eterm pattern, int reverse, Eterm *ret,
DbTableTree *stack_container,
CATreeRootIterator*);
int db_select_delete_tree_common(Process *p, DbTable *tbl,
Eterm tid, Eterm pattern,
Eterm *ret,
DbTreeStack* stack,
CATreeRootIterator* iter);
int db_select_continue_tree_common(Process *p,
DbTableCommon *tb,
Eterm continuation,
Eterm *ret,
DbTableTree *stack_container,
CATreeRootIterator* iter);
int db_select_delete_continue_tree_common(Process *p,
DbTable *tbl,
Eterm continuation,
Eterm *ret,
DbTreeStack* stack,
CATreeRootIterator* iter);
int db_select_count_tree_common(Process *p, DbTable *tb,
Eterm tid, Eterm pattern, Eterm *ret,
DbTableTree *stack_container,
CATreeRootIterator* iter);
int db_select_count_continue_tree_common(Process *p,
DbTable *tb,
Eterm continuation,
Eterm *ret,
DbTableTree *stack_container,
CATreeRootIterator* iter);
int db_select_replace_tree_common(Process *p, DbTable*,
Eterm tid, Eterm pattern, Eterm *ret,
DbTableTree *stack_container,
CATreeRootIterator* iter);
int db_select_replace_continue_tree_common(Process *p,
DbTable*,
Eterm continuation,
Eterm *ret,
DbTableTree *stack_container,
CATreeRootIterator* iter);
int db_take_tree_common(Process *p, DbTable *tbl, TreeDbTerm **root,
Eterm key, Eterm *ret,
DbTreeStack *stack /* NULL if no static stack */);
void db_print_tree_common(fmtfn_t to, void *to_arg,
int show, TreeDbTerm *root, DbTable *tbl);
void db_foreach_offheap_tree_common(TreeDbTerm *root,
void (*func)(ErlOffHeap *, void *),
void * arg);
int db_lookup_dbterm_tree_common(Process *p, DbTable *tbl, TreeDbTerm **root,
Eterm key, Eterm obj, DbUpdateHandle* handle,
DbTableTree *stack_container);
void db_finalize_dbterm_tree_common(int cret, DbUpdateHandle *handle,
DbTableTree *stack_container);
Sint cmp_partly_bound(Eterm partly_bound_key, Eterm bound_key);
#endif /* _DB_TREE_UTIL_H */
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