1 /*
2 * Copyright (C) 2016 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_COMPILER_UTILS_ATOMIC_DEX_REF_MAP_INL_H_
18 #define ART_COMPILER_UTILS_ATOMIC_DEX_REF_MAP_INL_H_
19
20 #include "atomic_dex_ref_map.h"
21
22 #include <type_traits>
23
24 #include "dex/class_reference.h"
25 #include "dex/dex_file-inl.h"
26 #include "dex/method_reference.h"
27 #include "dex/type_reference.h"
28
29 namespace art {
30
31 template <typename DexFileReferenceType, typename Value>
NumberOfDexIndices(const DexFile * dex_file)32 inline size_t AtomicDexRefMap<DexFileReferenceType, Value>::NumberOfDexIndices(
33 const DexFile* dex_file) {
34 // TODO: Use specialization for this? Not sure if worth it.
35 static_assert(std::is_same<DexFileReferenceType, MethodReference>::value ||
36 std::is_same<DexFileReferenceType, ClassReference>::value ||
37 std::is_same<DexFileReferenceType, TypeReference>::value,
38 "invalid index type");
39 if (std::is_same<DexFileReferenceType, MethodReference>::value) {
40 return dex_file->NumMethodIds();
41 }
42 if (std::is_same<DexFileReferenceType, ClassReference>::value) {
43 return dex_file->NumClassDefs();
44 }
45 if (std::is_same<DexFileReferenceType, TypeReference>::value) {
46 return dex_file->NumTypeIds();
47 }
48 UNREACHABLE();
49 }
50
51 template <typename DexFileReferenceType, typename Value>
52 inline typename AtomicDexRefMap<DexFileReferenceType, Value>::InsertResult
Insert(const DexFileReferenceType & ref,const Value & expected,const Value & desired)53 AtomicDexRefMap<DexFileReferenceType, Value>::Insert(const DexFileReferenceType& ref,
54 const Value& expected,
55 const Value& desired) {
56 ElementArray* const array = GetArray(ref.dex_file);
57 if (array == nullptr) {
58 return kInsertResultInvalidDexFile;
59 }
60 DCHECK_LT(ref.index, array->size());
61 return (*array)[ref.index].CompareAndSetStrongSequentiallyConsistent(expected, desired)
62 ? kInsertResultSuccess
63 : kInsertResultCASFailure;
64 }
65
66 template <typename DexFileReferenceType, typename Value>
Get(const DexFileReferenceType & ref,Value * out)67 inline bool AtomicDexRefMap<DexFileReferenceType, Value>::Get(const DexFileReferenceType& ref,
68 Value* out) const {
69 const ElementArray* const array = GetArray(ref.dex_file);
70 if (array == nullptr) {
71 return false;
72 }
73 *out = (*array)[ref.index].LoadRelaxed();
74 return true;
75 }
76
77 template <typename DexFileReferenceType, typename Value>
Remove(const DexFileReferenceType & ref,Value * out)78 inline bool AtomicDexRefMap<DexFileReferenceType, Value>::Remove(const DexFileReferenceType& ref,
79 Value* out) {
80 ElementArray* const array = GetArray(ref.dex_file);
81 if (array == nullptr) {
82 return false;
83 }
84 *out = (*array)[ref.index].ExchangeSequentiallyConsistent(nullptr);
85 return true;
86 }
87
88 template <typename DexFileReferenceType, typename Value>
AddDexFile(const DexFile * dex_file)89 inline void AtomicDexRefMap<DexFileReferenceType, Value>::AddDexFile(const DexFile* dex_file) {
90 arrays_.Put(dex_file, std::move(ElementArray(NumberOfDexIndices(dex_file))));
91 }
92
93 template <typename DexFileReferenceType, typename Value>
AddDexFiles(const std::vector<const DexFile * > & dex_files)94 inline void AtomicDexRefMap<DexFileReferenceType, Value>::AddDexFiles(
95 const std::vector<const DexFile*>& dex_files) {
96 for (const DexFile* dex_file : dex_files) {
97 if (!HaveDexFile(dex_file)) {
98 AddDexFile(dex_file);
99 }
100 }
101 }
102
103 template <typename DexFileReferenceType, typename Value>
104 inline typename AtomicDexRefMap<DexFileReferenceType, Value>::ElementArray*
GetArray(const DexFile * dex_file)105 AtomicDexRefMap<DexFileReferenceType, Value>::GetArray(const DexFile* dex_file) {
106 auto it = arrays_.find(dex_file);
107 return (it != arrays_.end()) ? &it->second : nullptr;
108 }
109
110 template <typename DexFileReferenceType, typename Value>
111 inline const typename AtomicDexRefMap<DexFileReferenceType, Value>::ElementArray*
GetArray(const DexFile * dex_file)112 AtomicDexRefMap<DexFileReferenceType, Value>::GetArray(const DexFile* dex_file) const {
113 auto it = arrays_.find(dex_file);
114 return (it != arrays_.end()) ? &it->second : nullptr;
115 }
116
117 template <typename DexFileReferenceType, typename Value> template <typename Visitor>
Visit(const Visitor & visitor)118 inline void AtomicDexRefMap<DexFileReferenceType, Value>::Visit(const Visitor& visitor) {
119 for (auto& pair : arrays_) {
120 const DexFile* dex_file = pair.first;
121 const ElementArray& elements = pair.second;
122 for (size_t i = 0; i < elements.size(); ++i) {
123 visitor(DexFileReference(dex_file, i), elements[i].LoadRelaxed());
124 }
125 }
126 }
127
128 template <typename DexFileReferenceType, typename Value>
ClearEntries()129 inline void AtomicDexRefMap<DexFileReferenceType, Value>::ClearEntries() {
130 for (auto& it : arrays_) {
131 for (auto& element : it.second) {
132 element.StoreRelaxed(nullptr);
133 }
134 }
135 }
136
137 } // namespace art
138
139 #endif // ART_COMPILER_UTILS_ATOMIC_DEX_REF_MAP_INL_H_
140