mirror of https://gitee.com/bigwinds/arangodb
92 lines
2.4 KiB
C++
92 lines
2.4 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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/// DISCLAIMER
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///
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/// Copyright 2014-2016 ArangoDB GmbH, Cologne, Germany
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/// Copyright 2004-2014 triAGENS GmbH, Cologne, Germany
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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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/// Copyright holder is ArangoDB GmbH, Cologne, Germany
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///
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/// @author Jan Steemann
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////////////////////////////////////////////////////////////////////////////////
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#ifndef ARANGOD_TRANSACTION_HINTS_H
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#define ARANGOD_TRANSACTION_HINTS_H 1
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#include "Basics/Common.h"
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namespace arangodb {
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namespace transaction {
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class Hints {
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public:
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typedef uint32_t ValueType;
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/// @brief individual hint flags that can be used for transactions
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enum class Hint : ValueType {
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NONE = 0,
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SINGLE_OPERATION = 1,
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LOCK_ENTIRELY = 2,
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LOCK_NEVER = 4,
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NO_BEGIN_MARKER = 8, // not supported in RocksDB
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NO_ABORT_MARKER = 16, // not supported in RocksDB
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NO_THROTTLING = 32, // not supported in RocksDB
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TRY_LOCK = 64,
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NO_COMPACTION_LOCK = 128, // not supported in RocksDB
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NO_USAGE_LOCK = 256, // not supported in RocksDB
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RECOVERY = 512,
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NO_DLD = 1024 // disable deadlock detection
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};
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Hints() : _value(0) {}
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explicit Hints(Hint value) : _value(static_cast<ValueType>(value)) {}
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explicit Hints(ValueType value) : _value(value) {}
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inline bool has(ValueType value) const noexcept {
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return (_value & value) != 0;
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}
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inline bool has(Hint value) const noexcept {
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return has(static_cast<ValueType>(value));
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}
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inline void set(ValueType value) {
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_value |= value;
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}
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inline void set(Hint value) {
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set(static_cast<ValueType>(value));
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}
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inline void unset(ValueType value) {
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_value &= ~value;
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}
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inline void unset(Hint value) {
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unset(static_cast<ValueType>(value));
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}
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inline ValueType toInt() const {
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return static_cast<ValueType>(_value);
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}
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private:
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ValueType _value;
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};
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}
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}
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#endif
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