1
/*****************************************************************************
3
Copyright (c) 2006, 2009, Innobase Oy. All Rights Reserved.
5
This program is free software; you can redistribute it and/or modify it under
6
the terms of the GNU General Public License as published by the Free Software
7
Foundation; version 2 of the License.
9
This program is distributed in the hope that it will be useful, but WITHOUT
10
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
11
FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
13
You should have received a copy of the GNU General Public License along with
14
this program; if not, write to the Free Software Foundation, Inc., 59 Temple
15
Place, Suite 330, Boston, MA 02111-1307 USA
17
*****************************************************************************/
19
#include "ut0wqueue.h"
21
/*******************************************************************//**
25
Created 4/26/2006 Osku Salerma
26
************************************************************************/
28
/****************************************************************//**
29
Create a new work queue.
33
ib_wqueue_create(void)
34
/*===================*/
36
ib_wqueue_t* wq = mem_alloc(sizeof(ib_wqueue_t));
38
mutex_create(&wq->mutex, SYNC_WORK_QUEUE);
40
wq->items = ib_list_create();
41
wq->event = os_event_create(NULL);
46
/****************************************************************//**
52
ib_wqueue_t* wq) /*!< in: work queue */
54
ut_a(!ib_list_get_first(wq->items));
56
mutex_free(&wq->mutex);
57
ib_list_free(wq->items);
58
os_event_free(wq->event);
63
/****************************************************************//**
64
Add a work item to the queue. */
69
ib_wqueue_t* wq, /*!< in: work queue */
70
void* item, /*!< in: work item */
71
mem_heap_t* heap) /*!< in: memory heap to use for allocating the
74
mutex_enter(&wq->mutex);
76
ib_list_add_last(wq->items, item, heap);
77
os_event_set(wq->event);
79
mutex_exit(&wq->mutex);
82
/****************************************************************//**
83
Wait for a work item to appear in the queue.
89
ib_wqueue_t* wq) /*!< in: work queue */
94
os_event_wait(wq->event);
96
mutex_enter(&wq->mutex);
98
node = ib_list_get_first(wq->items);
101
ib_list_remove(wq->items, node);
103
if (!ib_list_get_first(wq->items)) {
104
/* We must reset the event when the list
106
os_event_reset(wq->event);
112
mutex_exit(&wq->mutex);
115
mutex_exit(&wq->mutex);