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Viewing changes to storage/innobase/usr/usr0sess.c

  • Committer: brian
  • Date: 2008-06-25 05:29:13 UTC
  • Revision ID: brian@localhost.localdomain-20080625052913-6upwo0jsrl4lnapl
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storage/innobase/usr/usr0sess.c
 
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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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#include "usr0sess.h"
 
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#ifdef UNIV_NONINL
 
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#include "usr0sess.ic"
 
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#endif
 
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#include "trx0trx.h"
 
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/*************************************************************************
 
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Closes a session, freeing the memory occupied by it. */
 
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static
 
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void
 
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sess_close(
 
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/*=======*/
 
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        sess_t*         sess);  /* in, own: session object */
 
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/*************************************************************************
 
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Opens a session. */
 
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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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        sess_t* sess;
 
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        ut_ad(mutex_own(&kernel_mutex));
 
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        sess = mem_alloc(sizeof(sess_t));
 
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        sess->state = SESS_ACTIVE;
 
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        sess->trx = trx_create(sess);
 
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        UT_LIST_INIT(sess->graphs);
 
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        return(sess);
 
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}
 
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/*************************************************************************
 
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Closes a session, freeing the memory occupied by it. */
 
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static
 
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void
 
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sess_close(
 
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/*=======*/
 
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        sess_t* sess)   /* in, own: session object */
 
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{
 
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        ut_ad(mutex_own(&kernel_mutex));
 
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        ut_ad(sess->trx == NULL);
 
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        mem_free(sess);
 
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}
 
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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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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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{
 
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        ut_ad(mutex_own(&kernel_mutex));
 
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        if (UT_LIST_GET_LEN(sess->graphs) == 0) {
 
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                sess_close(sess);
 
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                return(TRUE);
 
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        }
 
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        return(FALSE);
 
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}