← Back to branch summary

~drizzle-trunk/drizzle/development

« back to all changes in this revision

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
clean slate

Show diffs side-by-side

added added

removed removed

Lines of Context:
storage/innobase/usr/usr0sess.c
 
1
/******************************************************
 
2
Sessions
 
3
 
 
4
(c) 1996 Innobase Oy
 
5
 
 
6
Created 6/25/1996 Heikki Tuuri
 
7
*******************************************************/
 
8
 
 
9
#include "usr0sess.h"
 
10
 
 
11
#ifdef UNIV_NONINL
 
12
#include "usr0sess.ic"
 
13
#endif
 
14
 
 
15
#include "trx0trx.h"
 
16
 
 
17
/*************************************************************************
 
18
Closes a session, freeing the memory occupied by it. */
 
19
static
 
20
void
 
21
sess_close(
 
22
/*=======*/
 
23
        sess_t*         sess);  /* in, own: session object */
 
24
 
 
25
/*************************************************************************
 
26
Opens a session. */
 
27
 
 
28
sess_t*
 
29
sess_open(void)
 
30
/*===========*/
 
31
                                        /* out, own: session object */
 
32
{
 
33
        sess_t* sess;
 
34
 
 
35
        ut_ad(mutex_own(&kernel_mutex));
 
36
 
 
37
        sess = mem_alloc(sizeof(sess_t));
 
38
 
 
39
        sess->state = SESS_ACTIVE;
 
40
 
 
41
        sess->trx = trx_create(sess);
 
42
 
 
43
        UT_LIST_INIT(sess->graphs);
 
44
 
 
45
        return(sess);
 
46
}
 
47
 
 
48
/*************************************************************************
 
49
Closes a session, freeing the memory occupied by it. */
 
50
static
 
51
void
 
52
sess_close(
 
53
/*=======*/
 
54
        sess_t* sess)   /* in, own: session object */
 
55
{
 
56
        ut_ad(mutex_own(&kernel_mutex));
 
57
        ut_ad(sess->trx == NULL);
 
58
 
 
59
        mem_free(sess);
 
60
}
 
61
 
 
62
/*************************************************************************
 
63
Closes a session, freeing the memory occupied by it, if it is in a state
 
64
where it should be closed. */
 
65
 
 
66
ibool
 
67
sess_try_close(
 
68
/*===========*/
 
69
                        /* out: TRUE if closed */
 
70
        sess_t* sess)   /* in, own: session object */
 
71
{
 
72
        ut_ad(mutex_own(&kernel_mutex));
 
73
 
 
74
        if (UT_LIST_GET_LEN(sess->graphs) == 0) {
 
75
                sess_close(sess);
 
76
 
 
77
                return(TRUE);
 
78
        }
 
79
 
 
80
        return(FALSE);
 
81
}