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author | vitalyisaev <vitalyisaev@ydb.tech> | 2023-11-30 13:26:22 +0300 |
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committer | vitalyisaev <vitalyisaev@ydb.tech> | 2023-11-30 15:44:45 +0300 |
commit | 0a98fece5a9b54f16afeb3a94b3eb3105e9c3962 (patch) | |
tree | 291d72dbd7e9865399f668c84d11ed86fb190bbf /contrib/libs/antlr4_cpp_runtime/src/atn/PredictionContextMergeCache.h | |
parent | cb2c8d75065e5b3c47094067cb4aa407d4813298 (diff) | |
download | ydb-0a98fece5a9b54f16afeb3a94b3eb3105e9c3962.tar.gz |
YQ Connector:Use docker-compose in integrational tests
Diffstat (limited to 'contrib/libs/antlr4_cpp_runtime/src/atn/PredictionContextMergeCache.h')
-rw-r--r-- | contrib/libs/antlr4_cpp_runtime/src/atn/PredictionContextMergeCache.h | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/contrib/libs/antlr4_cpp_runtime/src/atn/PredictionContextMergeCache.h b/contrib/libs/antlr4_cpp_runtime/src/atn/PredictionContextMergeCache.h new file mode 100644 index 0000000000..efaeaef578 --- /dev/null +++ b/contrib/libs/antlr4_cpp_runtime/src/atn/PredictionContextMergeCache.h @@ -0,0 +1,101 @@ +// Copyright 2012-2022 The ANTLR Project +// +// Redistribution and use in source and binary forms, with or without modification, are permitted +// provided that the following conditions are met: +// +// 1. Redistributions of source code must retain the above copyright notice, this list of conditions +// and the following disclaimer. +// +// 2. Redistributions in binary form must reproduce the above copyright notice, this list of +// conditions and the following disclaimer in the documentation and/or other materials provided +// with the distribution. +// +// 3. Neither the name of the copyright holder nor the names of its contributors may be used to +// endorse or promote products derived from this software without specific prior written +// permission. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR +// IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND +// FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR +// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL +// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, +// WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY +// WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +#pragma once + +#include <utility> + +#include "atn/PredictionContext.h" +#include "atn/PredictionContextMergeCacheOptions.h" +#include "FlatHashMap.h" + +namespace antlr4 { +namespace atn { + + class ANTLR4CPP_PUBLIC PredictionContextMergeCache final { + public: + PredictionContextMergeCache() + : PredictionContextMergeCache(PredictionContextMergeCacheOptions()) {} + + explicit PredictionContextMergeCache(const PredictionContextMergeCacheOptions &options); + + PredictionContextMergeCache(const PredictionContextMergeCache&) = delete; + PredictionContextMergeCache(PredictionContextMergeCache&&) = delete; + + PredictionContextMergeCache& operator=(const PredictionContextMergeCache&) = delete; + PredictionContextMergeCache& operator=(PredictionContextMergeCache&&) = delete; + + Ref<const PredictionContext> put(const Ref<const PredictionContext> &key1, + const Ref<const PredictionContext> &key2, + Ref<const PredictionContext> value); + + Ref<const PredictionContext> get(const Ref<const PredictionContext> &key1, + const Ref<const PredictionContext> &key2) const; + + const PredictionContextMergeCacheOptions& getOptions() const { return _options; } + + void clear(); + + private: + using PredictionContextPair = std::pair<const PredictionContext*, const PredictionContext*>; + + struct ANTLR4CPP_PUBLIC PredictionContextHasher final { + size_t operator()(const PredictionContextPair &value) const; + }; + + struct ANTLR4CPP_PUBLIC PredictionContextComparer final { + bool operator()(const PredictionContextPair &lhs, const PredictionContextPair &rhs) const; + }; + + struct ANTLR4CPP_PUBLIC Entry final { + std::pair<Ref<const PredictionContext>, Ref<const PredictionContext>> key; + Ref<const PredictionContext> value; + Entry *prev = nullptr; + Entry *next = nullptr; + }; + + void moveToFront(Entry *entry) const; + + void pushToFront(Entry *entry); + + void remove(Entry *entry); + + void compact(const Entry *preserve); + + using Container = FlatHashMap<PredictionContextPair, std::unique_ptr<Entry>, + PredictionContextHasher, PredictionContextComparer>; + + const PredictionContextMergeCacheOptions _options; + + Container _entries; + + mutable Entry *_head = nullptr; + mutable Entry *_tail = nullptr; + + size_t _size = 0; + }; + +} // namespace atn +} // namespace antlr4 |