84 lines
2.2 KiB
C
84 lines
2.2 KiB
C
#pragma once
|
|
#ifndef _READCONNECTION_H
|
|
#define _READCONNECTION_H
|
|
/*
|
|
* Copyright (c) 2016 MariaDB Corporation Ab
|
|
*
|
|
* Use of this software is governed by the Business Source License included
|
|
* in the LICENSE.TXT file and at www.mariadb.com/bsl11.
|
|
*
|
|
* Change Date: 2020-01-01
|
|
*
|
|
* On the date above, in accordance with the Business Source License, use
|
|
* of this software will be governed by version 2 or later of the General
|
|
* Public License.
|
|
*/
|
|
|
|
/**
|
|
* @file readconnection.h - The read connection balancing query module heder file
|
|
*
|
|
* @verbatim
|
|
* Revision History
|
|
*
|
|
* Date Who Description
|
|
* 14/06/13 Mark Riddoch Initial implementation
|
|
* 27/06/14 Mark Riddoch Addition of server weight percentage
|
|
*
|
|
* @endverbatim
|
|
*/
|
|
|
|
#define MXS_MODULE_NAME "readconnroute"
|
|
|
|
#include <maxscale/cdefs.h>
|
|
#include <maxscale/dcb.h>
|
|
#include <maxscale/service.h>
|
|
|
|
MXS_BEGIN_DECLS
|
|
|
|
/**
|
|
* The client session structure used within this router.
|
|
*/
|
|
typedef struct router_client_session
|
|
{
|
|
#if defined(SS_DEBUG)
|
|
skygw_chk_t rses_chk_top;
|
|
#endif
|
|
SPINLOCK rses_lock; /*< protects rses_deleted */
|
|
int rses_versno; /*< even = no active update, else odd */
|
|
bool rses_closed; /*< true when closeSession is called */
|
|
SERVER_REF *backend; /*< Backend used by the client session */
|
|
DCB *backend_dcb; /*< DCB Connection to the backend */
|
|
DCB *client_dcb; /**< Client DCB */
|
|
struct router_client_session *next;
|
|
#if defined(SS_DEBUG)
|
|
skygw_chk_t rses_chk_tail;
|
|
#endif
|
|
} ROUTER_CLIENT_SES;
|
|
|
|
/**
|
|
* The statistics for this router instance
|
|
*/
|
|
typedef struct
|
|
{
|
|
int n_sessions; /*< Number sessions created */
|
|
int n_queries; /*< Number of queries forwarded */
|
|
} ROUTER_STATS;
|
|
|
|
/**
|
|
* The per instance data for the router.
|
|
*/
|
|
typedef struct router_instance
|
|
{
|
|
SERVICE *service; /*< Pointer to the service using this router */
|
|
SPINLOCK lock; /*< Spinlock for the instance data */
|
|
unsigned int bitmask; /*< Bitmask to apply to server->status */
|
|
unsigned int bitvalue; /*< Required value of server->status */
|
|
ROUTER_STATS stats; /*< Statistics for this router */
|
|
struct router_instance
|
|
*next;
|
|
} ROUTER_INSTANCE;
|
|
|
|
MXS_END_DECLS
|
|
|
|
#endif
|