90 lines
2.7 KiB
C++
90 lines
2.7 KiB
C++
/*
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Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License, version 2.0,
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as published by the Free Software Foundation.
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This program is also distributed with certain software (including
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but not limited to OpenSSL) that is licensed under separate terms,
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as designated in a particular file or component or in included license
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documentation. The authors of MySQL hereby grant you an additional
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permission to link the program and your derivative works with the
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separately licensed software that they have included with MySQL.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef _TCP_PORT_POOL_H_
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#define _TCP_PORT_POOL_H_
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#include <chrono>
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#include <cstdint>
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#include <vector>
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/** @class UniqueID
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*
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* Helper class allowing mechanism to retrieve system-level unique identifier.
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* Compatible with mysql-test MTR, see mysql-test/lib/mtr_unique.pm for details
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*
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**/
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class UniqueId {
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public:
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UniqueId(unsigned start_from, unsigned range);
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UniqueId(UniqueId &&other);
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~UniqueId();
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UniqueId(const UniqueId &) = delete;
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UniqueId &operator=(const UniqueId &) = delete;
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unsigned get() const { return id_; }
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private:
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bool lock_file(const std::string &file_name);
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std::string get_lock_file_dir() const;
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uint16_t id_;
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#ifndef _WIN32
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int lock_file_fd_;
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#else
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HANDLE lock_file_fd_;
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#endif
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std::string lock_file_name_;
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};
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/** @class TcpPortPool
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*
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* Helper class allowing mechanism to retrieve pool of the system-level unique
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*TCP port numbers. Compatible with mysql-test MTR, see
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*mysql-test/lib/mtr_unique.pm for details.
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*
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**/
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class TcpPortPool {
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public:
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TcpPortPool() {}
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TcpPortPool(const TcpPortPool &) = delete;
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TcpPortPool &operator=(const TcpPortPool &) = delete;
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TcpPortPool(TcpPortPool &&other) = default;
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uint16_t get_next_available(
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const std::chrono::milliseconds socket_probe_timeout =
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std::chrono::milliseconds(200));
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private:
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std::vector<UniqueId> unique_ids_;
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unsigned number_of_ids_used_{0};
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static const constexpr unsigned kPortsPerFile{10};
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static const constexpr unsigned kPortsStartFrom{100};
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static const constexpr unsigned kPortsRange{200};
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};
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#endif // _TCP_PORT_POOL_H_
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