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Viewing changes to storage/innobase/include/lock0priv.h

  • Committer: brian
  • Date: 2008-06-25 05:29:13 UTC
  • Revision ID: brian@localhost.localdomain-20080625052913-6upwo0jsrl4lnapl
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storage/innobase/include/lock0priv.h
 
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/******************************************************
 
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Lock module internal structures and methods.
 
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(c) 2007 Innobase Oy
 
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Created July 12, 2007 Vasil Dimov
 
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*******************************************************/
 
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#ifndef lock0priv_h
 
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#define lock0priv_h
 
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#ifndef LOCK_MODULE_IMPLEMENTATION
 
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/* If you need to access members of the structures defined in this
 
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file, please write appropriate functions that retrieve them and put
 
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those functions in lock/ */
 
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#error Do not include lock0priv.h outside of the lock/ module
 
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#endif
 
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#include "univ.i"
 
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#include "dict0types.h"
 
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#include "hash0hash.h"
 
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#include "trx0types.h"
 
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#include "ut0lst.h"
 
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/* A table lock */
 
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typedef struct lock_table_struct        lock_table_t;
 
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struct lock_table_struct {
 
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        dict_table_t*   table;          /* database table in dictionary
 
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                                        cache */
 
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        UT_LIST_NODE_T(lock_t)
 
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                        locks;          /* list of locks on the same
 
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                                        table */
 
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};
 
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/* Record lock for a page */
 
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typedef struct lock_rec_struct          lock_rec_t;
 
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struct lock_rec_struct {
 
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        ulint   space;                  /* space id */
 
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        ulint   page_no;                /* page number */
 
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        ulint   n_bits;                 /* number of bits in the lock
 
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                                        bitmap; NOTE: the lock bitmap is
 
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                                        placed immediately after the
 
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                                        lock struct */
 
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};
 
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/* Lock struct */
 
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struct lock_struct {
 
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        trx_t*          trx;            /* transaction owning the
 
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                                        lock */
 
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        UT_LIST_NODE_T(lock_t)
 
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                        trx_locks;      /* list of the locks of the
 
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                                        transaction */
 
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        ulint           type_mode;      /* lock type, mode, LOCK_GAP or
 
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                                        LOCK_REC_NOT_GAP,
 
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                                        LOCK_INSERT_INTENTION,
 
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                                        wait flag, ORed */
 
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        hash_node_t     hash;           /* hash chain node for a record
 
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                                        lock */
 
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        dict_index_t*   index;          /* index for a record lock */
 
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        union {
 
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                lock_table_t    tab_lock;/* table lock */
 
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                lock_rec_t      rec_lock;/* record lock */
 
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        } un_member;
 
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};
 
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/*************************************************************************
 
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Gets the type of a lock. */
 
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UNIV_INLINE
 
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ulint
 
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lock_get_type(
 
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/*==========*/
 
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                                /* out: LOCK_TABLE or LOCK_REC */
 
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        const lock_t*   lock);  /* in: lock */
 
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/**************************************************************************
 
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Looks for a set bit in a record lock bitmap. Returns ULINT_UNDEFINED,
 
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if none found. */
 
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ulint
 
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lock_rec_find_set_bit(
 
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/*==================*/
 
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                        /* out: bit index == heap number of the record, or
 
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                        ULINT_UNDEFINED if none found */
 
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        lock_t* lock);  /* in: record lock with at least one bit set */
 
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/*************************************************************************
 
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Gets the previous record lock set on a record. */
 
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lock_t*
 
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lock_rec_get_prev(
 
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/*==============*/
 
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                        /* out: previous lock on the same record, NULL if
 
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                        none exists */
 
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        lock_t* in_lock,/* in: record lock */
 
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        ulint   heap_no);/* in: heap number of the record */
 
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#ifndef UNIV_NONINL
 
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#include "lock0priv.ic"
 
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#endif
 
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#endif /* lock0priv_h */