1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
|
/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
*
* Copyright (C) 2008 Sun Microsystems
*
* 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <drizzled/global.h>
#include <drizzled/definitions.h>
#include <drizzled/query_id.h>
#include <mysys/my_pthread.h>
Query_id::Query_id() : the_query_id(1)
{
/* pthread_mutex_init always returns 0 */
(void)pthread_mutex_init(&LOCK_query_id, MY_MUTEX_INIT_FAST);
}
Query_id::~Query_id()
{
pthread_mutex_destroy(&LOCK_query_id);
}
query_id_t Query_id::value() const
{
return the_query_id;
}
query_id_t Query_id::next()
{
pthread_mutex_lock(&LOCK_query_id);
query_id_t ret= the_query_id++;
pthread_mutex_unlock(&LOCK_query_id);
return ret;
}
|