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Craig Tillerfba79f22015-11-23 11:06:55 -08001/*
2 *
3 * Copyright 2015, Google Inc.
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are
8 * met:
9 *
10 * * Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * * Redistributions in binary form must reproduce the above
13 * copyright notice, this list of conditions and the following disclaimer
14 * in the documentation and/or other materials provided with the
15 * distribution.
16 * * Neither the name of Google Inc. nor the names of its
17 * contributors may be used to endorse or promote products derived from
18 * this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
23 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
24 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
25 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
26 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
30 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 *
32 */
33
34#ifndef GRPC_SUPPORT_AVL_H
35#define GRPC_SUPPORT_AVL_H
36
37#include <grpc/support/sync.h>
38
39typedef struct gpr_avl_node {
40 gpr_refcount refs;
41 void *key;
42 void *value;
43 struct gpr_avl_node *left;
44 struct gpr_avl_node *right;
45 long height;
46} gpr_avl_node;
47
48typedef struct gpr_avl_vtable {
49 void (*destroy_key)(void *key);
50 void *(*copy_key)(void *key);
51 long (*compare_keys)(void *key1, void *key2);
52 void (*destroy_value)(void *value);
53 void *(*copy_value)(void *value);
54} gpr_avl_vtable;
55
56typedef struct gpr_avl {
57 const gpr_avl_vtable *vtable;
58 gpr_avl_node *root;
59} gpr_avl;
60
61gpr_avl gpr_avl_create(const gpr_avl_vtable *vtable);
62void gpr_avl_destroy(gpr_avl avl);
63gpr_avl gpr_avl_add(gpr_avl avl, void *key, void *value);
64gpr_avl gpr_avl_remove(gpr_avl avl, void *key);
65void *gpr_avl_get(gpr_avl avl, void *key);
66
67#endif