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/******************************************************
Sessions
(c) 1996 Innobase Oy
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. */
sess_t*
sess_open(void)
/*===========*/
/* out, own: session object */
{
sess_t* sess;
#ifdef UNIV_SYNC_DEBUG
ut_ad(mutex_own(&kernel_mutex));
#endif /* UNIV_SYNC_DEBUG */
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 */
{
#ifdef UNIV_SYNC_DEBUG
ut_ad(mutex_own(&kernel_mutex));
#endif /* UNIV_SYNC_DEBUG */
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. */
ibool
sess_try_close(
/*===========*/
/* out: TRUE if closed */
sess_t* sess) /* in, own: session object */
{
#ifdef UNIV_SYNC_DEBUG
ut_ad(mutex_own(&kernel_mutex));
#endif /* UNIV_SYNC_DEBUG */
if (UT_LIST_GET_LEN(sess->graphs) == 0) {
sess_close(sess);
return(TRUE);
}
return(FALSE);
}
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