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d77e348fbd
* Remove old Innobase copyright lines from C source files * Add a reference to the GPLv2 license as recommended by the lawyers at Oracle Legal [Step 22/28]
77 lines
2.4 KiB
C
77 lines
2.4 KiB
C
/*****************************************************************************
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Copyright (c) 2006, 2009, Innobase Oy. All Rights Reserved.
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This program is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free Software
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Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along with
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this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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Place, Suite 330, Boston, MA 02111-1307 USA
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*****************************************************************************/
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/***********************************************************************
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A Work queue. Threads can add work items to the queue and other threads can
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wait for work items to be available and take them off the queue for
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processing.
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************************************************************************/
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#ifndef IB_WORK_QUEUE_H
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#define IB_WORK_QUEUE_H
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#include "ut0list.h"
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#include "mem0mem.h"
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#include "os0sync.h"
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#include "sync0types.h"
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typedef struct ib_wqueue_struct ib_wqueue_t;
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/********************************************************************
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Create a new work queue. */
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UNIV_INTERN
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ib_wqueue_t*
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ib_wqueue_create(void);
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/*===================*/
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/* out: work queue */
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/********************************************************************
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Free a work queue. */
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UNIV_INTERN
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void
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ib_wqueue_free(
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/*===========*/
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ib_wqueue_t* wq); /* in: work queue */
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/********************************************************************
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Add a work item to the queue. */
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UNIV_INTERN
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void
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ib_wqueue_add(
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/*==========*/
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ib_wqueue_t* wq, /* in: work queue */
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void* item, /* in: work item */
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mem_heap_t* heap); /* in: memory heap to use for allocating the
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list node */
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/********************************************************************
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Wait for a work item to appear in the queue. */
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UNIV_INTERN
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void*
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ib_wqueue_wait(
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/* out: work item */
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ib_wqueue_t* wq); /* in: work queue */
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/* Work queue. */
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struct ib_wqueue_struct {
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mutex_t mutex; /* mutex protecting everything */
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ib_list_t* items; /* work item list */
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os_event_t event; /* event we use to signal additions to list */
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};
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#endif
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