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/* Definition of the queue support module.
*
* Copyright 2008 Rainer Gerhards and Adiscon GmbH.
*
* This file is part of rsyslog.
*
* Rsyslog is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Rsyslog 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
* along with Rsyslog. If not, see <http://www.gnu.org/licenses/>.
*
* A copy of the GPL can be found in the file "COPYING" in this distribution.
*/
#ifndef QUEUE_H_INCLUDED
#define QUEUE_H_INCLUDED
/* queue types */
typedef enum {
QUEUETYPE_FIXED_ARRAY, /* a simple queue made out of a fixed (initially malloced) array fast but memoryhog */
QUEUETYPE_LINKEDLIST, /* linked list used as buffer, lower fixed memory overhead but slower */
} queueTypes_t;
/* the queue object */
typedef struct {
queueTypes_t qType;
int iMaxQueSize; /* how large can the queue grow? */
void** pUsr; /* the queued user data structure */
/* synchronization variables */
pthread_mutex_t *mut;
pthread_cond_t *notFull, *notEmpty;
int full, empty;
/* end sync variables */
union { /* different data elements based on queue type (qType) */
struct {
long head, tail;
} farray;
} tVars;
} queue_t;
/* this is the first approach to a queue, this time with static
* memory.
*/
typedef struct {
void** pbuf;
long head, tail;
int full, empty;
pthread_mutex_t *mut;
pthread_cond_t *notFull, *notEmpty;
} msgQueue;
/* prototypes */
msgQueue *queueInit (void);
void queueDelete (msgQueue *q);
void queueAdd (msgQueue *q, void* in);
void queueDel (msgQueue *q, void **out);
/* go-away's */
extern int iMainMsgQueueSize;
extern msgQueue *pMsgQueue;
#endif /* #ifndef QUEUE_H_INCLUDED */
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