TypeCheck.h revision 375fb116bcb817b37509ab579dbd55cdbb765cbf 
1/*
2 * Copyright (C) 2008 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16/*
17 * instanceof, checkcast, etc.
18 */
19#ifndef DALVIK_OO_TYPECHECK_H_
20#define DALVIK_OO_TYPECHECK_H_
21
22/* VM startup/shutdown */
23bool dvmInstanceofStartup(void);
24void dvmInstanceofShutdown(void);
25
26
27/* used by dvmInstanceof; don't call */
28extern "C" int dvmInstanceofNonTrivial(const ClassObject* instance,
29                                       const ClassObject* clazz);
30
31/*
32 * Determine whether "instance" is an instance of "clazz".
33 *
34 * Returns 0 (false) if not, 1 (true) if so.
35 */
36INLINE int dvmInstanceof(const ClassObject* instance, const ClassObject* clazz)
37{
38    if (instance == clazz) {
39        if (CALC_CACHE_STATS)
40            gDvm.instanceofCache->trivial++;
41        return 1;
42    } else
43        return dvmInstanceofNonTrivial(instance, clazz);
44}
45
46/*
47 * Determine whether a class implements an interface.
48 *
49 * Returns 0 (false) if not, 1 (true) if so.
50 */
51int dvmImplements(const ClassObject* clazz, const ClassObject* interface);
52
53/*
54 * Determine whether "sub" is a sub-class of "clazz".
55 *
56 * Returns 0 (false) if not, 1 (true) if so.
57 */
58INLINE int dvmIsSubClass(const ClassObject* sub, const ClassObject* clazz) {
59    do {
60        /*printf("###### sub='%s' clazz='%s'\n", sub->name, clazz->name);*/
61        if (sub == clazz)
62            return 1;
63        sub = sub->super;
64    } while (sub != NULL);
65
66    return 0;
67}
68
69/*
70 * Determine whether or not we can store an object into an array, based
71 * on the classes of the two.
72 *
73 * Returns 0 (false) if not, 1 (true) if so.
74 */
75extern "C" bool dvmCanPutArrayElement(const ClassObject* elemClass,
76    const ClassObject* arrayClass);
77
78#endif  // DALVIK_OO_TYPECHECK_H_
79