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      1 /* -*- mode: C; c-file-style: "gnu" -*- */
      2 /* expirelist.h  List of stuff that expires
      3  *
      4  * Copyright (C) 2003  Red Hat, Inc.
      5  *
      6  * Licensed under the Academic Free License version 2.1
      7  *
      8  * This program is free software; you can redistribute it and/or modify
      9  * it under the terms of the GNU General Public License as published by
     10  * the Free Software Foundation; either version 2 of the License, or
     11  * (at your option) any later version.
     12  *
     13  * This program is distributed in the hope that it will be useful,
     14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     16  * GNU General Public License for more details.
     17  *
     18  * You should have received a copy of the GNU General Public License
     19  * along with this program; if not, write to the Free Software
     20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
     21  *
     22  */
     23 
     24 #ifndef BUS_EXPIRE_LIST_H
     25 #define BUS_EXPIRE_LIST_H
     26 
     27 #include <dbus/dbus.h>
     28 #include <dbus/dbus-list.h>
     29 #include <dbus/dbus-mainloop.h>
     30 
     31 typedef struct BusExpireList BusExpireList;
     32 typedef struct BusExpireItem BusExpireItem;
     33 
     34 typedef dbus_bool_t (* BusExpireFunc) (BusExpireList *list,
     35                                        DBusList      *link,
     36                                        void          *data);
     37 
     38 struct BusExpireList
     39 {
     40   DBusList      *items; /**< List of BusExpireItem */
     41   DBusTimeout   *timeout;
     42   DBusLoop      *loop;
     43   BusExpireFunc  expire_func;
     44   void          *data;
     45   int            expire_after; /**< Expire after milliseconds (thousandths) */
     46 };
     47 
     48 /* embed this in a child expire item struct */
     49 struct BusExpireItem
     50 {
     51   long added_tv_sec;  /**< Time we were added (seconds component) */
     52   long added_tv_usec; /**< Time we were added (microsec component) */
     53 };
     54 
     55 BusExpireList* bus_expire_list_new    (DBusLoop      *loop,
     56                                        int            expire_after,
     57                                        BusExpireFunc  expire_func,
     58                                        void          *data);
     59 void           bus_expire_list_free   (BusExpireList *list);
     60 
     61 #define ELAPSED_MILLISECONDS_SINCE(orig_tv_sec, orig_tv_usec,   \
     62                                    now_tv_sec, now_tv_usec)     \
     63  (((double) (now_tv_sec) - (double) (orig_tv_sec)) * 1000.0 +   \
     64  ((double) (now_tv_usec) - (double) (orig_tv_usec)) / 1000.0)
     65 
     66 void bus_expire_timeout_set_interval (DBusTimeout *timeout,
     67                                       int          next_interval);
     68 
     69 #endif /* BUS_EXPIRE_LIST_H */
     70