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/*****************************************************************************
Copyright (c) 1996, 2009, Innobase Oy. All Rights Reserved.
This program is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free Software
Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with
this program; if not, write to the Free Software Foundation, Inc., 59 Temple
Place, Suite 330, Boston, MA 02111-1307 USA
*****************************************************************************/
/**************************************************//**
@file usr/usr0sess.c
Sessions
Created 6/25/1996 Heikki Tuuri
*******************************************************/
#include "usr0sess.h"
#ifdef UNIV_NONINL
#include "usr0sess.ic"
#endif
#include "trx0trx.h"
/*********************************************************************//**
Closes a session, freeing the memory occupied by it. */
static
void
sess_close(
/*=======*/
sess_t* sess); /*!< in, own: session object */
/*********************************************************************//**
Opens a session.
@return own: session object */
UNIV_INTERN
sess_t*
sess_open(void)
/*===========*/
{
sess_t* sess;
ut_ad(mutex_own(&kernel_mutex));
sess = mem_alloc(sizeof(sess_t));
sess->state = SESS_ACTIVE;
sess->trx = trx_create(sess);
UT_LIST_INIT(sess->graphs);
return(sess);
}
/*********************************************************************//**
Closes a session, freeing the memory occupied by it. */
static
void
sess_close(
/*=======*/
sess_t* sess) /*!< in, own: session object */
{
ut_ad(mutex_own(&kernel_mutex));
ut_ad(sess->trx == NULL);
mem_free(sess);
}
/*********************************************************************//**
Closes a session, freeing the memory occupied by it, if it is in a state
where it should be closed.
@return TRUE if closed */
UNIV_INTERN
ibool
sess_try_close(
/*===========*/
sess_t* sess) /*!< in, own: session object */
{
ut_ad(mutex_own(&kernel_mutex));
if (UT_LIST_GET_LEN(sess->graphs) == 0) {
sess_close(sess);
return(TRUE);
}
return(FALSE);
}
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