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/* Copyright (C) 2007-2012 Open Information Security Foundation
*
* You can copy, redistribute or modify this Program under the terms of
* the GNU General Public License version 2 as published by the Free
* Software Foundation.
*
* 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
* version 2 along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*/
/**
* \file
*
* \author Victor Julien <victor@inliniac.net>
*/
#ifndef __DEFRAG_QUEUE_H__
#define __DEFRAG_QUEUE_H__
#include "suricata-common.h"
#include "defrag.h"
/** Spinlocks or Mutex for the defrag tracker queues. */
//#define DQLOCK_SPIN
#define DQLOCK_MUTEX
#ifdef DQLOCK_SPIN
#ifdef DQLOCK_MUTEX
#error Cannot enable both DQLOCK_SPIN and DQLOCK_MUTEX
#endif
#endif
/* Define a queue for storing defrag trackers */
typedef struct DefragTrackerQueue_
{
DefragTracker *top;
DefragTracker *bot;
uint32_t len;
#ifdef DBG_PERF
uint32_t dbg_maxlen;
#endif /* DBG_PERF */
#ifdef DQLOCK_MUTEX
SCMutex m;
#elif defined DQLOCK_SPIN
SCSpinlock s;
#else
#error Enable DQLOCK_SPIN or DQLOCK_MUTEX
#endif
} DefragTrackerQueue;
#ifdef DQLOCK_SPIN
#define DQLOCK_INIT(q) SCSpinInit(&(q)->s, 0)
#define DQLOCK_DESTROY(q) SCSpinDestroy(&(q)->s)
#define DQLOCK_LOCK(q) SCSpinLock(&(q)->s)
#define DQLOCK_TRYLOCK(q) SCSpinTrylock(&(q)->s)
#define DQLOCK_UNLOCK(q) SCSpinUnlock(&(q)->s)
#elif defined DQLOCK_MUTEX
#define DQLOCK_INIT(q) SCMutexInit(&(q)->m, NULL)
#define DQLOCK_DESTROY(q) SCMutexDestroy(&(q)->m)
#define DQLOCK_LOCK(q) SCMutexLock(&(q)->m)
#define DQLOCK_TRYLOCK(q) SCMutexTrylock(&(q)->m)
#define DQLOCK_UNLOCK(q) SCMutexUnlock(&(q)->m)
#else
#error Enable DQLOCK_SPIN or DQLOCK_MUTEX
#endif
/* prototypes */
DefragTrackerQueue *DefragTrackerQueueNew(void);
DefragTrackerQueue *DefragTrackerQueueInit(DefragTrackerQueue *);
void DefragTrackerQueueDestroy (DefragTrackerQueue *);
void DefragTrackerEnqueue (DefragTrackerQueue *, DefragTracker *);
DefragTracker *DefragTrackerDequeue (DefragTrackerQueue *);
uint32_t DefragTrackerQueueLen(DefragTrackerQueue *);
#endif /* __DEFRAG_QUEUE_H__ */
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