1 /*
2  * Copyright (C) 2011 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 #ifndef ART_RUNTIME_MIRROR_IFTABLE_H_
18 #define ART_RUNTIME_MIRROR_IFTABLE_H_
19 
20 #include "base/casts.h"
21 #include "object_array.h"
22 
23 namespace art {
24 namespace mirror {
25 
26 class MANAGED IfTable FINAL : public ObjectArray<Object> {
27  public:
GetInterface(int32_t i)28   ALWAYS_INLINE Class* GetInterface(int32_t i) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
29     Class* interface = GetWithoutChecks((i * kMax) + kInterface)->AsClass();
30     DCHECK(interface != NULL);
31     return interface;
32   }
33 
34   ALWAYS_INLINE void SetInterface(int32_t i, Class* interface)
35       SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
36 
GetMethodArray(int32_t i)37   ObjectArray<ArtMethod>* GetMethodArray(int32_t i) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
38     ObjectArray<ArtMethod>* method_array =
39         down_cast<ObjectArray<ArtMethod>*>(Get((i * kMax) + kMethodArray));
40     DCHECK(method_array != NULL);
41     return method_array;
42   }
43 
GetMethodArrayCount(int32_t i)44   size_t GetMethodArrayCount(int32_t i) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
45     ObjectArray<ArtMethod>* method_array =
46         down_cast<ObjectArray<ArtMethod>*>(Get((i * kMax) + kMethodArray));
47     if (method_array == NULL) {
48       return 0;
49     }
50     return method_array->GetLength();
51   }
52 
SetMethodArray(int32_t i,ObjectArray<ArtMethod> * new_ma)53   void SetMethodArray(int32_t i, ObjectArray<ArtMethod>* new_ma)
54       SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
55     DCHECK(new_ma != NULL);
56     DCHECK(Get((i * kMax) + kMethodArray) == NULL);
57     Set<false>((i * kMax) + kMethodArray, new_ma);
58   }
59 
Count()60   size_t Count() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
61     return GetLength() / kMax;
62   }
63 
64   enum {
65     // Points to the interface class.
66     kInterface   = 0,
67     // Method pointers into the vtable, allow fast map from interface method index to concrete
68     // instance method.
69     kMethodArray = 1,
70     kMax         = 2,
71   };
72 
73  private:
74   DISALLOW_IMPLICIT_CONSTRUCTORS(IfTable);
75 };
76 
77 }  // namespace mirror
78 }  // namespace art
79 
80 #endif  // ART_RUNTIME_MIRROR_IFTABLE_H_
81