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Viewing changes to plugin/innobase/include/trx0purge.h

  • Committer: Package Import Robot
  • Author(s): Tobias Frost
  • Date: 2013-08-22 20:18:31 UTC
  • mto: (20.1.1 sid)
  • mto: This revision was merged to the branch mainline in revision 21.
  • Revision ID: package-import@ubuntu.com-20130822201831-gn3ozsh7o7wmc5tk
Tags: upstream-7.2.3
Import upstream version 7.2.3

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plugin/innobase/include/trx0purge.h
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/*****************************************************************************
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Copyright (C) 1996, 2009, Innobase Oy. All Rights Reserved.
 
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Copyright (C) 1996, 2011, Innobase Oy. All Rights Reserved.
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This program is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free Software
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mutex. */
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UNIV_INTERN
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void
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trx_purge_sys_create(void);
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/*======================*/
 
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trx_purge_sys_create(
 
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/*=================*/
 
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        ib_bh_t*        ib_bh); /*!< in/own: UNDO log min binary heap*/
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/********************************************************************//**
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Frees the global purge system control structure. */
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UNIV_INTERN
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        ulint           state;          /*!< Purge system state */
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        sess_t*         sess;           /*!< System session running the purge
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                                        query */
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        trx_t*          trx;            /*!< System transaction running the purge
 
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        trx_t*          trx;            /*!< System transaction running the
 
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                                        purge
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                                        query: this trx is not in the trx list
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                                        of the trx system and it never ends */
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        que_t*          query;          /*!< The query graph which will do the
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                                        parallelized purge operation */
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        rw_lock_t       latch;          /*!< The latch protecting the purge view.
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                                        A purge operation must acquire an
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                                        x-latch here for the instant at which
 
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        rw_lock_t       latch;          /*!< The latch protecting the purge
 
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                                        view.  A purge operation must acquire
 
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                                        an x-latch here for the instant at which
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                                        it changes the purge view: an undo
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                                        log operation can prevent this by
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                                        obtaining an s-latch here. */
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        read_view_t*    view;           /*!< The purge will not remove undo logs
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                                        which are >= this view (purge view) */
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        mutex_t         mutex;          /*!< Mutex protecting the fields below */
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        ulint           n_pages_handled;/*!< Approximate number of undo log
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                                        pages processed in purge */
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        ulint           handle_limit;   /*!< Target of how many pages to get
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        mem_heap_t*     heap;           /*!< Temporary storage used during a
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                                        purge: can be emptied after purge
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                                        completes */
 
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        /*-----------------------------*/
 
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        ib_bh_t*        ib_bh;          /*!< Binary min-heap, ordered on
 
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                                        rseg_queue_t::trx_no. It is protected
 
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                                        by the bh_mutex */
 
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        mutex_t         bh_mutex;       /*!< Mutex protecting ib_bh */
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};
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#define TRX_PURGE_ON            1       /* purge operation is running */