mirror of https://gitee.com/bigwinds/arangodb
93 lines
3.2 KiB
C++
93 lines
3.2 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 Frank Celler
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/// @author Achim Brandt
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////////////////////////////////////////////////////////////////////////////////
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#ifndef ARANGODB_BASICS_NONCE_H
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#define ARANGODB_BASICS_NONCE_H 1
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#include "Basics/Common.h"
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namespace arangodb {
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namespace basics {
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namespace Nonce {
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////////////////////////////////////////////////////////////////////////////////
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/// @brief statistics collection
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////////////////////////////////////////////////////////////////////////////////
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struct Statistics {
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uint32_t age;
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uint32_t checks;
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uint32_t isUnused;
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uint32_t isUsed;
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uint32_t marked;
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uint32_t falselyUsed;
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double fillingDegree;
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};
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////////////////////////////////////////////////////////////////////////////////
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/// @brief sets initial size for nonces hash
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////////////////////////////////////////////////////////////////////////////////
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void setInitialSize(size_t);
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////////////////////////////////////////////////////////////////////////////////
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/// @brief creates a nonce hash of given size
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////////////////////////////////////////////////////////////////////////////////
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void create(size_t);
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////////////////////////////////////////////////////////////////////////////////
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/// @brief destroys the nonce storage
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////////////////////////////////////////////////////////////////////////////////
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void destroy();
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////////////////////////////////////////////////////////////////////////////////
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/// @brief create a nonce
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////////////////////////////////////////////////////////////////////////////////
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std::string createNonce();
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////////////////////////////////////////////////////////////////////////////////
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/// @brief checks if a nonce is valid and invalidates it
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////////////////////////////////////////////////////////////////////////////////
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bool checkAndMark(std::string const& nonce);
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////////////////////////////////////////////////////////////////////////////////
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/// @brief checks if a nonce is valid and invalidates it
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////////////////////////////////////////////////////////////////////////////////
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bool checkAndMark(uint32_t timestamp, uint64_t random);
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////////////////////////////////////////////////////////////////////////////////
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/// @brief returns the statistics
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////////////////////////////////////////////////////////////////////////////////
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std::vector<Statistics> statistics();
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} // namespace Nonce
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} // namespace basics
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} // namespace arangodb
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#endif
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