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86 lines
2.7 KiB
86 lines
2.7 KiB
/*
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* Copyright (C) 2016 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef ART_COMPILER_UTILS_ATOMIC_DEX_REF_MAP_H_
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#define ART_COMPILER_UTILS_ATOMIC_DEX_REF_MAP_H_
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#include "base/atomic.h"
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#include "base/dchecked_vector.h"
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#include "base/safe_map.h"
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#include "dex/dex_file_reference.h"
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namespace art {
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class DexFile;
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// Used by CompilerCallbacks to track verification information from the Runtime.
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template <typename DexFileReferenceType, typename Value>
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class AtomicDexRefMap {
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public:
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AtomicDexRefMap() {}
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~AtomicDexRefMap() {}
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// Atomically swap the element in if the existing value matches expected.
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enum InsertResult {
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kInsertResultInvalidDexFile,
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kInsertResultCASFailure,
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kInsertResultSuccess,
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};
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InsertResult Insert(const DexFileReferenceType& ref,
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const Value& expected,
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const Value& desired);
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// Retreive an item, returns false if the dex file is not added.
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bool Get(const DexFileReferenceType& ref, Value* out) const;
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// Remove an item and return the existing value. Returns false if the dex file is not added.
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bool Remove(const DexFileReferenceType& ref, Value* out);
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// Dex files must be added before method references belonging to them can be used as keys. Not
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// thread safe.
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void AddDexFile(const DexFile* dex_file);
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void AddDexFiles(const std::vector<const DexFile*>& dex_files);
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// Return a vector of all dex files which were added to the map.
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std::vector<const DexFile*> GetDexFiles() const;
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bool HaveDexFile(const DexFile* dex_file) const {
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return arrays_.find(dex_file) != arrays_.end();
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}
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// Visit all of the dex files and elements.
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template <typename Visitor>
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void Visit(const Visitor& visitor);
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void ClearEntries();
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private:
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// Verified methods. The method array is fixed to avoid needing a lock to extend it.
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using ElementArray = dchecked_vector<Atomic<Value>>;
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using DexFileArrays = SafeMap<const DexFile*, ElementArray>;
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const ElementArray* GetArray(const DexFile* dex_file) const;
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ElementArray* GetArray(const DexFile* dex_file);
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static size_t NumberOfDexIndices(const DexFile* dex_file);
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DexFileArrays arrays_;
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};
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} // namespace art
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#endif // ART_COMPILER_UTILS_ATOMIC_DEX_REF_MAP_H_
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