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  • Committer: Vadim Tkachenko
  • Date: 2008-12-01 02:05:57 UTC
  • Revision ID: vadim@percona.com-20081201020557-p7k2m94mjtdg1a83
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include/usr0sess.h
 
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/******************************************************
 
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Sessions
 
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(c) 1996 Innobase Oy
 
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Created 6/25/1996 Heikki Tuuri
 
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*******************************************************/
 
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#ifndef usr0sess_h
 
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#define usr0sess_h
 
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#include "univ.i"
 
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#include "ut0byte.h"
 
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#include "trx0types.h"
 
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#include "srv0srv.h"
 
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#include "trx0types.h"
 
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#include "usr0types.h"
 
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#include "que0types.h"
 
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#include "data0data.h"
 
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#include "rem0rec.h"
 
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/*************************************************************************
 
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Opens a session. */
 
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UNIV_INTERN
 
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sess_t*
 
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sess_open(void);
 
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/*============*/
 
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                                        /* out, own: session object */
 
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/*************************************************************************
 
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Closes a session, freeing the memory occupied by it, if it is in a state
 
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where it should be closed. */
 
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UNIV_INTERN
 
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ibool
 
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sess_try_close(
 
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/*===========*/
 
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                                /* out: TRUE if closed */
 
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        sess_t*         sess);  /* in, own: session object */
 
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/* The session handle. All fields are protected by the kernel mutex */
 
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struct sess_struct{
 
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        ulint           state;          /* state of the session */
 
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        trx_t*          trx;            /* transaction object permanently
 
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                                        assigned for the session: the
 
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                                        transaction instance designated by the
 
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                                        trx id changes, but the memory
 
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                                        structure is preserved */
 
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        UT_LIST_BASE_NODE_T(que_t)
 
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                        graphs;         /* query graphs belonging to this
 
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                                        session */
 
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};
 
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/* Session states */
 
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#define SESS_ACTIVE             1
 
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#define SESS_ERROR              2       /* session contains an error message
 
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                                        which has not yet been communicated
 
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                                        to the client */
 
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#ifndef UNIV_NONINL
 
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#include "usr0sess.ic"
 
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#endif
 
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#endif