69 lines
2.0 KiB
C
69 lines
2.0 KiB
C
/*
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* Copyright (c) 2018 MariaDB Corporation Ab
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*
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* Use of this software is governed by the Business Source License included
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* in the LICENSE.TXT file and at www.mariadb.com/bsl11.
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*
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* Change Date: 2022-01-01
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*
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* On the date above, in accordance with the Business Source License, use
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* of this software will be governed by version 2 or later of the General
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* Public License.
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*/
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#pragma once
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/**
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* @file readconnection.h - The read connection balancing query module heder file
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*
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* @verbatim
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* Revision History
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*
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* Date Who Description
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* 14/06/13 Mark Riddoch Initial implementation
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* 27/06/14 Mark Riddoch Addition of server weight percentage
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*
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* @endverbatim
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*/
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#define MXS_MODULE_NAME "readconnroute"
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#include <maxscale/cdefs.h>
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#include <maxscale/dcb.h>
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#include <maxscale/service.h>
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#include <maxscale/router.h>
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/**
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* The client session structure used within this router.
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*/
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struct ROUTER_CLIENT_SES: MXS_ROUTER_SESSION
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{
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SPINLOCK rses_lock; /*< protects rses_deleted */
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int rses_versno; /*< even = no active update, else odd */
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bool rses_closed; /*< true when closeSession is called */
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SERVER_REF *backend; /*< Backend used by the client session */
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DCB *backend_dcb; /*< DCB Connection to the backend */
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DCB *client_dcb; /**< Client DCB */
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uint32_t bitmask; /*< Bitmask to apply to server->status */
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uint32_t bitvalue; /*< Session specific required value of server->status */
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};
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/**
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* The statistics for this router instance
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*/
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struct ROUTER_STATS
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{
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int n_sessions; /*< Number sessions created */
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int n_queries; /*< Number of queries forwarded */
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};
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/**
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* The per instance data for the router.
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*/
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struct ROUTER_INSTANCE: public MXS_ROUTER
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{
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SERVICE *service; /*< Pointer to the service using this router */
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SPINLOCK lock; /*< Spinlock for the instance data */
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uint64_t bitmask_and_bitvalue; /*< Lower 32-bits for bitmask and upper for bitvalue */
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ROUTER_STATS stats; /*< Statistics for this router */
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};
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