pqueue.h

/* 
 *  pqueue.h - header priority quue functions
 *  Copyright (C) 2010-2011  Axel Zeuner
 *
 *  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.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */
#if !defined (__PQUEUE_H__)
#define __PQUEUE_H__ 1

#include <stdio.h>

struct pqueue;

#define PQUEUE_PRI_MAX 100
#define PQUEUE_PRI_MIN 0
#define PQUEUE_RUN_BIT (1<<((sizeof(unsigned)*8)-1))
//#define PQUEUE_PRI_RUN -1
#define PQUEUE_PRI_DEFAULT ((PQUEUE_PRI_MAX-PQUEUE_PRI_MIN)/2)
#define PQUEUE_JOB_LIST_FILE "joblist.dat"

extern
struct pqueue* pqueue_open_lock_read(const char* path, int rw);

extern 
int pqueue_update_close_destroy(struct pqueue* pq, int rw);

extern
int pqueue_close(struct pqueue* pq);

extern
void pqueue_destroy(struct pqueue* q);

extern
int pqueue_enqueue(struct pqueue* q, int pri, uid_t uid);

extern
int pqueue_remove(struct pqueue* q, int id, uid_t uid);

extern
int pqueue_remove_active(struct pqueue* q, int id, uid_t uid);

extern
int pqueue_reset_active(struct pqueue* q, int id, uid_t uid);

extern
int pqueue_dequeue(struct pqueue* q);

extern
int pqueue_check_jobid(const struct pqueue* q, int id, uid_t uid);

extern 
int pqueue_get_job_uid(const struct pqueue* q, int id, uid_t* uid);

extern
int pqueue_get_entry_cnt(const struct pqueue* q);

extern
int pqueue_next_id(struct pqueue* q);

extern
int pqueue_fs_init(const char* path);

extern
int pqueue_print(FILE* f, const struct pqueue* q, uid_t uid);


#endif