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 != nullptr); 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 PointerArray* GetMethodArray(int32_t i) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 38 auto* method_array = down_cast<PointerArray*>(Get((i * kMax) + kMethodArray)); 39 DCHECK(method_array != nullptr); 40 return method_array; 41 } 42 GetMethodArrayCount(int32_t i)43 size_t GetMethodArrayCount(int32_t i) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 44 auto* method_array = down_cast<PointerArray*>(Get((i * kMax) + kMethodArray)); 45 return method_array == nullptr ? 0u : method_array->GetLength(); 46 } 47 SetMethodArray(int32_t i,PointerArray * arr)48 void SetMethodArray(int32_t i, PointerArray* arr) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 49 DCHECK(arr != nullptr); 50 auto idx = i * kMax + kMethodArray; 51 DCHECK(Get(idx) == nullptr); 52 Set<false>(idx, arr); 53 } 54 Count()55 size_t Count() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 56 return GetLength() / kMax; 57 } 58 59 enum { 60 // Points to the interface class. 61 kInterface = 0, 62 // Method pointers into the vtable, allow fast map from interface method index to concrete 63 // instance method. 64 kMethodArray = 1, 65 kMax = 2, 66 }; 67 68 private: 69 DISALLOW_IMPLICIT_CONSTRUCTORS(IfTable); 70 }; 71 72 } // namespace mirror 73 } // namespace art 74 75 #endif // ART_RUNTIME_MIRROR_IFTABLE_H_ 76