2 * IRC - Internet Relay Chat, ircd/destruct_event.c
3 * Copyright (C) 2002 Carlo Wood <carlo@alinoe.com>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 1, or (at your option)
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 * @brief Implementation of timed channel destruction events.
25 #include "channel.h" /* destruct_channel */
27 #include "ircd_alloc.h"
29 #include "ircd_events.h"
34 /* #include <assert.h> -- Now using assert in ircd_log.h */
37 /** Structure describing a destruction event. */
38 struct DestructEvent {
39 struct DestructEvent* next_event; /**< Next event in the queue. */
40 struct DestructEvent* prev_event; /**< Previous event in the queue. */
41 time_t expires; /**< When the destruction should happen. */
42 struct Channel* chptr; /**< Channel to destroy. */
45 /** Head of short-delay destruction events. */
46 static struct DestructEvent* minute_list_top;
47 /** Tail of short-delay destruction events. */
48 static struct DestructEvent* minute_list_bottom;
49 /** Head of long-delay destruction events. */
50 static struct DestructEvent* days_list_top;
51 /** Tail of long-delay destruction events. */
52 static struct DestructEvent* days_list_bottom;
54 /** Schedule a short-delay destruction event for \a chptr.
55 * @param[in] chptr Channel to destroy.
57 void schedule_destruct_event_1m(struct Channel* chptr)
59 struct DestructEvent* new_event;
61 /* Ignore request when we already have a destruct request */
62 if (chptr->destruct_event)
65 /* Create a new destruct event and add it at the top of the list. */
66 new_event = (struct DestructEvent*)MyMalloc(sizeof(struct DestructEvent));
67 new_event->expires = TStime() + 60; /* 1 minute from now */
68 new_event->next_event = NULL;
69 new_event->prev_event = minute_list_top;
70 new_event->chptr = chptr;
73 minute_list_top->next_event = new_event;
74 minute_list_top = new_event;
75 if (!minute_list_bottom)
76 minute_list_bottom = new_event;
78 chptr->destruct_event = new_event;
81 /** Schedule a long-delay destruction event for \a chptr.
82 * @param[in] chptr Channel to destroy.
84 void schedule_destruct_event_48h(struct Channel* chptr)
86 struct DestructEvent* new_event;
88 /* Ignore request when we already have a destruct request */
89 if (chptr->destruct_event)
92 /* Create a new destruct event and add it at the top of the list. */
93 new_event = (struct DestructEvent*)MyMalloc(sizeof(struct DestructEvent));
94 new_event->expires = TStime() + 172800; /* 48 hours from now */
95 new_event->next_event = NULL;
96 new_event->prev_event = days_list_top;
97 new_event->chptr = chptr;
100 days_list_top->next_event = new_event;
101 days_list_top = new_event;
102 if (!days_list_bottom)
103 days_list_bottom = new_event;
105 chptr->destruct_event = new_event;
108 /** Unlink a destruction event for a channel.
109 * @param[in] chptr Channel that is being destroyed early.
111 void remove_destruct_event(struct Channel* chptr)
113 struct DestructEvent* event = chptr->destruct_event;
115 assert(event != NULL);
118 if (event->prev_event)
119 event->prev_event->next_event = event->next_event;
120 if (event->next_event)
121 event->next_event->prev_event = event->prev_event;
123 /* correct top and bottom pointers */
124 if (days_list_top == event)
125 days_list_top = event->prev_event;
126 if (minute_list_top == event)
127 minute_list_top = event->prev_event;
128 if (days_list_bottom == event)
129 days_list_bottom = event->next_event;
130 if (minute_list_bottom == event)
131 minute_list_bottom = event->next_event;
136 chptr->destruct_event = NULL;
139 /** Execute expired channel destruction events.
140 * @param[in] ev Expired timer event (ignored).
142 void exec_expired_destruct_events(struct Event* ev)
145 struct DestructEvent** list_bottom;
146 for(list_bottom = &minute_list_bottom; i < 2; ++i, list_bottom = &days_list_bottom)
148 while (*list_bottom && TStime() >= (*list_bottom)->expires)
150 struct Channel* chptr = (*list_bottom)->chptr;
151 /* Send DESTRUCT message */
152 sendcmdto_serv_butone(&me, CMD_DESTRUCT, 0, "%s %Tu", chptr->chname, chptr->creationtime);
153 remove_destruct_event(chptr);
154 destruct_channel(chptr);