/*

 * iSCSI Safe Logging and Tracing Library

 *

 * Copyright (C) 2004 Dmitry Yusupov, Alex Aizman

 * maintained by open-iscsi@googlegroups.com

 *

 * circular buffer code based on log.c from dm-multipath project

 *

 * heavily based on code from log.c:

 *   Copyright (C) 2002-2003 Ardis Technolgies <roman@ardistech.com>,

 *   licensed under the terms of the GNU GPL v2.0,

 *

 * This program 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 2 of the License, or

 * (at your option) any later version.

 *

 * 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.

 *

 * See the file COPYING included with this distribution for more details.

 */

#ifndef LOG_H

#define LOG_H

#include <stdarg.h>

#include <sys/types.h>

#include "iscsid.h"

union semun {

	int val;

	struct semid_ds *buf;

	unsigned short int *array;

	struct seminfo *__buf;

};

#include <sys/sem.h>

#define DEFAULT_AREA_SIZE 16384

#define MAX_MSG_SIZE 256

extern int log_level;

struct logmsg {

	short int prio;

	void *next;

	char *str;

};

struct logarea {

	int shmid;

	int shmid_msg;

	int shmid_buff;

	int empty;

	void *head;

	void *tail;

	void *start;

	void *end;

	char *buff;

	struct sembuf ops[1];

	int semid;

	union semun semarg;

};

extern struct logarea *la;

extern int log_init(char *program_name, int size,

	void (*func)(int prio, void *priv, const char *fmt, va_list ap),

	void *priv);

extern void log_close (pid_t pid);

extern void dump_logmsg (void *);

extern void log_info(const char *fmt, ...)

	__attribute__ ((format (printf, 1, 2)));

extern void log_warning(const char *fmt, ...)

	__attribute__ ((format (printf, 1, 2)));

extern void log_error(const char *fmt, ...)

	__attribute__ ((format (printf, 1, 2)));

extern void log_debug(int level, const char *fmt, ...)

	__attribute__ ((format (printf, 2, 3)));

extern void log_do_log_daemon(int prio, void *priv, const char *fmt, va_list ap);

extern void log_do_log_std(int prio, void *priv, const char *fmt, va_list ap);

#endif	/* LOG_H */