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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 __FLOW_QUEUE_H__
#define __FLOW_QUEUE_H__
#include "suricata-common.h"
#include "flow.h"
/** Spinlocks or Mutex for the flow queues. */
//#define FQLOCK_SPIN
#define FQLOCK_MUTEX
#ifdef FQLOCK_SPIN
#ifdef FQLOCK_MUTEX
#error Cannot enable both FQLOCK_SPIN and FQLOCK_MUTEX
#endif
#endif
typedef struct FlowQueuePrivate_
{
Flow *top;
Flow *bot;
uint32_t len;
} FlowQueuePrivate;
/* Define a queue for storing flows */
typedef struct FlowQueue_
{
FlowQueuePrivate priv;
SC_ATOMIC_DECLARE(bool,non_empty);
#ifdef FQLOCK_MUTEX
SCMutex m;
#elif defined FQLOCK_SPIN
SCSpinlock s;
#else
#error Enable FQLOCK_SPIN or FQLOCK_MUTEX
#endif
} FlowQueue;
#define qtop priv.top
#define qbot priv.bot
#define qlen priv.len
#ifdef FQLOCK_SPIN
#define FQLOCK_INIT(q) SCSpinInit(&(q)->s, 0)
#define FQLOCK_DESTROY(q) SCSpinDestroy(&(q)->s)
#define FQLOCK_LOCK(q) SCSpinLock(&(q)->s)
#define FQLOCK_TRYLOCK(q) SCSpinTrylock(&(q)->s)
#define FQLOCK_UNLOCK(q) SCSpinUnlock(&(q)->s)
#elif defined FQLOCK_MUTEX
#define FQLOCK_INIT(q) SCMutexInit(&(q)->m, NULL)
#define FQLOCK_DESTROY(q) SCMutexDestroy(&(q)->m)
#define FQLOCK_LOCK(q) SCMutexLock(&(q)->m)
#define FQLOCK_TRYLOCK(q) SCMutexTrylock(&(q)->m)
#define FQLOCK_UNLOCK(q) SCMutexUnlock(&(q)->m)
#else
#error Enable FQLOCK_SPIN or FQLOCK_MUTEX
#endif
/* prototypes */
FlowQueue *FlowQueueNew(void);
FlowQueue *FlowQueueInit(FlowQueue *);
void FlowQueueDestroy (FlowQueue *);
void FlowEnqueue (FlowQueue *, Flow *);
Flow *FlowDequeue (FlowQueue *);
void FlowQueueRemove(FlowQueue *fq, Flow *f);
void FlowQueuePrivateAppendFlow(FlowQueuePrivate *fqc, Flow *f);
void FlowQueuePrivatePrependFlow(FlowQueuePrivate *fqc, Flow *f);
void FlowQueueAppendPrivate(FlowQueue *fq, FlowQueuePrivate *fqp);
void FlowQueuePrivateAppendPrivate(FlowQueuePrivate *dest, FlowQueuePrivate *src);
FlowQueuePrivate FlowQueueExtractPrivate(FlowQueue *fq);
Flow *FlowQueuePrivateGetFromTop(FlowQueuePrivate *fqp);
#endif /* __FLOW_QUEUE_H__ */
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