cq.h

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/*
 * $Id: cq.h,v 1.5 2005/09/16 21:58:03 rmanfredi Exp $
 *
 * Copyright (c) 2002-2003, Raphael Manfredi
 *
 *----------------------------------------------------------------------
 * This file is part of gtk-gnutella.
 *
 *  gtk-gnutella 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.
 *
 *  gtk-gnutella 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 gtk-gnutella; if not, write to the Free Software
 *  Foundation, Inc.:
 *      59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *----------------------------------------------------------------------
 */

#ifndef _cq_h_
#define _cq_h_

#include <glib.h>

struct cqueue;

typedef void (*cq_service_t)(struct cqueue *cq, gpointer obj);

typedef struct cevent {
    struct cevent *ce_bnext;    
    struct cevent *ce_bprev;    
    cq_service_t ce_fn;         
    gpointer ce_arg;            
    time_t ce_time;             
    guint ce_magic;             
} cevent_t;

struct chash {
    cevent_t *ch_head;          
    cevent_t *ch_tail;          
};

typedef struct cqueue {
    struct chash *cq_hash;      
    time_t cq_time;             
    gint cq_ticks;              
    gint cq_items;              
    gint cq_last_bucket;        
    struct chash *cq_current;   
} cqueue_t;

#define cq_ticks(x) ((x)->cq_ticks)

/*
 * Interface routines.
 */

extern cqueue_t *callout_queue; /* Single global instance */

gdouble callout_queue_coverage(gint old_ticks);

void cq_init(void);
void cq_close(void);

cqueue_t *cq_make(time_t now);
void cq_free(cqueue_t *cq);
gpointer cq_insert(cqueue_t *cq, gint delay, cq_service_t fn, gpointer arg);
void cq_expire(cqueue_t *cq, cevent_t *ev);
void cq_cancel(cqueue_t *cq, gpointer handle);
void cq_resched(cqueue_t *cq, gpointer handle, gint delay);
void cq_clock(cqueue_t *cq, gint elapsed);

#endif  /* _cq_h_ */

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