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