64 lines
2.2 KiB
C++
64 lines
2.2 KiB
C++
#ifndef CONNECTION_HANDLER_INCLUDED
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#define CONNECTION_HANDLER_INCLUDED
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/* Copyright (c) 2007, 2017, 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, version 2.0, 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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#include "my_inttypes.h"
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class THD;
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class Channel_info;
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class Connection_handler_manager;
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/**
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This abstract base class represents how connections are processed,
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most importantly how they map to OS threads.
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*/
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class Connection_handler {
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protected:
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friend class Connection_handler_manager;
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Connection_handler() {}
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virtual ~Connection_handler() {}
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/**
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Add a connection.
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@param channel_info Pointer to the Channel_info object.
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@note If this function is successful (returns false), the ownership of
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channel_info is transferred. Otherwise the caller is responsible for
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its destruction.
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@return true if processing of the new connection failed, false otherwise.
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*/
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virtual bool add_connection(Channel_info *channel_info) = 0;
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/**
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@return Maximum number of threads that can be created
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by this connection handler.
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*/
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virtual uint get_max_threads() const = 0;
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};
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#endif // CONNECTION_HANDLER_INCLUDED
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