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/**
* Copyright (c) 2009, 2010 Open Information Security Foundation.
*
* \author Anoop Saldanha <anoopsaldanha@gmail.com>
*
* \file Generic queues. Any instance that wants to get itself on the generic
* queue, would have to implement the template struct SCDQGenericQData_
* defined below.
*/
#ifndef __DATA_QUEUE_H__
#define __DATA_QUEUE_H__
#include "threads.h"
/**
* \brief Generic template for any data structure that wants to be on the
* queue. Any other data structure that wants to be on the queue
* needs to use this template and define its own members from
* <your_own_structure_members_from_here_on> onwards.
*/
typedef struct SCDQGenericQData_ {
/* this is needed when we want to supply a list of data items */
struct SCDQGenericQData_ *next;
struct SCDQGenericQData_ *prev;
/* if we want to consider this pointer as the head of a list, this var
* holds the no of elements in the list. Else it holds a <need_to_think>. */
//uint16_t len;
/* in case this data instance is the head of a list, we can refer the
* bottomost instance directly using this var */
//struct SCDQGenericaQData *bot;
/* any other data structure that wants to be on the queue can implement
* its own memebers from here on, in its structure definition. Just note
* that the first 2 members should always be next and prev in the same
* order */
// <your_own_structure_members_from_here_on>
} SCDQGenericQData;
/**
* \brief The data queue to hold instances that implement the template
* SCDQGenericQData.
*/
typedef struct SCDQDataQueue_ {
/* holds the item at the top of the queue */
SCDQGenericQData *top;
/* holds the item at the bottom of the queue */
SCDQGenericQData *bot;
/* no of items currently in the queue */
uint16_t len;
#ifdef DBG_PERF
uint16_t dbg_maxlen;
#endif /* DBG_PERF */
SCMutex mutex_q;
SCCondT cond_q;
} __attribute__((aligned(CLS))) SCDQDataQueue;
void SCDQDataEnqueue(SCDQDataQueue *, SCDQGenericQData *);
SCDQGenericQData *SCDQDataDequeue(SCDQDataQueue *);
#endif /* __DATA_QUEUE_H__ */
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