/*
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* Copyright (C) 2013 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_DEDUPE_SET_H_
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#define ART_COMPILER_UTILS_DEDUPE_SET_H_
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#include <stdint.h>
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#include <memory>
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#include <string>
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#include "base/macros.h"
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namespace art {
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class Thread;
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// A set of Keys that support a HashFunc returning HashType. Used to find duplicates of Key in the
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// Add method. The data-structure is thread-safe through the use of internal locks, it also
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// supports the lock being sharded.
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template <typename InKey,
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typename StoreKey,
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typename Alloc,
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typename HashType,
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typename HashFunc,
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HashType kShard = 1>
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class DedupeSet {
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public:
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// Add a new key to the dedupe set if not present. Return the equivalent deduplicated stored key.
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const StoreKey* Add(Thread* self, const InKey& key);
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DedupeSet(const char* set_name, const Alloc& alloc);
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~DedupeSet();
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std::string DumpStats(Thread* self) const;
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private:
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struct Stats;
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class Shard;
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std::unique_ptr<Shard> shards_[kShard];
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uint64_t hash_time_;
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DISALLOW_COPY_AND_ASSIGN(DedupeSet);
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};
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} // namespace art
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#endif // ART_COMPILER_UTILS_DEDUPE_SET_H_
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