1a978be6b6
- All now include maxscale/cdefs.h as the very first file. - MXS_[BEGIN|END]_DECLS added to all C-headers. Strictly speaking not necessary for private headers, but does not hurt either. - Include guards moved to the very top of the file. - #pragma once added.
77 lines
1.9 KiB
C
77 lines
1.9 KiB
C
#pragma once
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#ifndef _MAXSCALE_QUEUEMANAGER_H
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#define _MAXSCALE_QUEUEMANAGER_H
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/*
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* Copyright (c) 2016 MariaDB Corporation Ab
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*
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* Use of this software is governed by the Business Source License included
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* in the LICENSE.TXT file and at www.mariadb.com/bsl.
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*
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* Change Date: 2019-07-01
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*
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* On the date above, in accordance with the Business Source License, use
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* of this software will be governed by version 2 or later of the General
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* Public License.
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*/
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/**
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* @file queuemanager.h The Queue Manager header file
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*
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*
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* @verbatim
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* Revision History
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*
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* Date Who Description
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* 27/04/2016 Martin Brampton Initial implementation
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*
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* @endverbatim
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*/
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#include <maxscale/cdefs.h>
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#include <stdbool.h>
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#include <maxscale/spinlock.h>
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MXS_BEGIN_DECLS
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#define CONNECTION_QUEUE_LIMIT 1000
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typedef struct queue_entry
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{
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void *queued_object;
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long heartbeat;
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#if defined(SS_DEBUG)
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long sequence_check;
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#endif /* SS_DEBUG */
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} QUEUE_ENTRY;
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typedef struct queue_config
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{
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int queue_limit;
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int start;
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int end;
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int timeout;
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bool has_entries;
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SPINLOCK queue_lock;
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QUEUE_ENTRY *queue_array;
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#if defined(SS_DEBUG)
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long sequence_number;
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#endif /* SS_DEBUG */
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} QUEUE_CONFIG;
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QUEUE_CONFIG *mxs_queue_alloc(int limit, int timeout);
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void mxs_queue_free(QUEUE_CONFIG *queue_config);
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bool mxs_enqueue(QUEUE_CONFIG *queue_config, void *new_entry);
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bool mxs_dequeue(QUEUE_CONFIG *queue_config, QUEUE_ENTRY *result);
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bool mxs_dequeue_if_expired(QUEUE_CONFIG *queue_config, QUEUE_ENTRY *result);
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static inline int
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mxs_queue_count(QUEUE_CONFIG *queue_config)
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{
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int count = queue_config->end - queue_config->start;
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return count < 0 ? (count + queue_config->queue_limit + 1): count;
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}
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MXS_END_DECLS
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#endif /* QUEUEMANAGER_H */
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