trunk/src/event.c

/*
 *  ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
 *
 *  Copyright (c) 2000-2016 ircd-hybrid development team
 *
 *  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 Street, Fifth Floor, Boston, MA 02110-1301
 *  USA
 */

/*! \file event.c
 * \brief Timer based event execution
 * \version $Id$
 */

#include "stdinc.h"
#include "list.h"
#include "ircd.h"
#include "event.h"
#include "client.h"
#include "send.h"
#include "numeric.h"
#include "rng_mt.h"


static dlink_list event_list;

const dlink_list *
event_get_list(void)
{
  return &event_list;
}

void
event_add(struct event *ev, void *data)
{
  dlink_node *node;

  event_delete(ev);

  ev->data = data;
  ev->next = CurrentTime + ev->when;
  ev->active = 1;

  DLINK_FOREACH(node, event_list.head)
  {
    struct event *e = node->data;

    if (e->next > ev->next)
    {
      dlinkAddBefore(node, ev, &ev->node, &event_list);
      return;
    }
  }

  dlinkAddTail(ev, &ev->node, &event_list);
}

void
event_addish(struct event *ev, void *data)
{
  if (ev->when >= 3)
  {
    const uintmax_t two_third = (2 * ev->when) / 3;

    ev->when = two_third + ((genrand_int32() % 1000) * two_third) / 1000;
  }

  event_add(ev, data);
}

void
event_delete(struct event *ev)
{
  if (!ev->active)
    return;

  dlinkDelete(&ev->node, &event_list);
  ev->active = 0;
}

void
event_run(void)
{
  static uintmax_t last = 0;

  if (last == CurrentTime)
    return;
  last = CurrentTime;

  unsigned int len = dlink_list_length(&event_list);
  while (len-- && dlink_list_length(&event_list))
  {
    struct event *ev = event_list.head->data;

    if (ev->next > CurrentTime)
      break;

    event_delete(ev);

    ev->handler(ev->data);

    if (!ev->oneshot)
      event_add(ev, ev->data);
  }
}

/*
 * void event_set_back_events(uintmax_t by)
 * Input: Time to set back events by.
 * Output: None.
 * Side-effects: Sets back all events by "by" seconds.
 */
void
event_set_back_events(uintmax_t by)
{
  dlink_node *node;

  DLINK_FOREACH(node, event_list.head)
  {
    struct event *ev = node->data;
    ev->next -= by;
  }
}
Revision:	7431
Committed:	Tue Mar 8 18:20:10 2016 UTC (9 years, 5 months ago) by michael
Content type:	text/x-csrc
File size:	2732 byte(s)
Log Message:	- Minor style cleanups & constification
#	User	Rev	Content
1	adx	30	/*
2	michael	4130	* ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
3	adx	30	*
4	michael	7006	* Copyright (c) 2000-2016 ircd-hybrid development team
5	adx	30	*
6	michael	4130	* This program is free software; you can redistribute it and/or modify
7			* it under the terms of the GNU General Public License as published by
8			* the Free Software Foundation; either version 2 of the License, or
9			* (at your option) any later version.
10			*
11			* This program is distributed in the hope that it will be useful,
12			* but WITHOUT ANY WARRANTY; without even the implied warranty of
13			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14			* GNU General Public License for more details.
15			*
16			* You should have received a copy of the GNU General Public License
17			* along with this program; if not, write to the Free Software
18	michael	4565	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
19	michael	4130	* USA
20	adx	30	*/
21
22	michael	4130	/*! \file event.c
23			* \brief Timer based event execution
24			* \version $Id$
25			*/
26
27	adx	30	#include "stdinc.h"
28	michael	1011	#include "list.h"
29	adx	30	#include "ircd.h"
30			#include "event.h"
31			#include "client.h"
32			#include "send.h"
33			#include "numeric.h"
34	michael	2680	#include "rng_mt.h"
35	adx	30
36	michael	6527
37	michael	6370	static dlink_list event_list;
38	michael	2680
39	michael	6306	const dlink_list *
40			event_get_list(void)
41			{
42	michael	6370	return &event_list;
43	michael	6306	}
44
45	michael	4094	void
46			event_add(struct event ev, void data)
47			{
48			dlink_node *node;
49	adx	30
50	michael	4094	event_delete(ev);
51	michael	3599
52	michael	4094	ev->data = data;
53			ev->next = CurrentTime + ev->when;
54	michael	6642	ev->active = 1;
55	michael	3599
56	michael	6370	DLINK_FOREACH(node, event_list.head)
57	michael	4094	{
58			struct event *e = node->data;
59	michael	3599
60	michael	4094	if (e->next > ev->next)
61	adx	30	{
62	michael	6370	dlinkAddBefore(node, ev, &ev->node, &event_list);
63	adx	30	return;
64			}
65			}
66
67	michael	6370	dlinkAddTail(ev, &ev->node, &event_list);
68	adx	30	}
69
70			void
71	michael	4094	event_addish(struct event ev, void data)
72	adx	30	{
73	michael	4094	if (ev->when >= 3)
74	adx	30	{
75	michael	7330	const uintmax_t two_third = (2 * ev->when) / 3;
76	michael	4126
77	michael	4094	ev->when = two_third + ((genrand_int32() % 1000) * two_third) / 1000;
78	adx	30	}
79
80	michael	4094	event_add(ev, data);
81	adx	30	}
82
83			void
84	michael	4094	event_delete(struct event *ev)
85	adx	30	{
86	michael	6642	if (!ev->active)
87	michael	4094	return;
88
89	michael	6370	dlinkDelete(&ev->node, &event_list);
90	michael	6642	ev->active = 0;
91	adx	30	}
92
93	michael	4094	void
94			event_run(void)
95	adx	30	{
96	michael	7330	static uintmax_t last = 0;
97	adx	30
98	michael	4094	if (last == CurrentTime)
99			return;
100			last = CurrentTime;
101
102	michael	7431	unsigned int len = dlink_list_length(&event_list);
103	michael	6370	while (len-- && dlink_list_length(&event_list))
104	michael	4094	{
105	michael	7431	struct event *ev = event_list.head->data;
106	michael	4094
107	michael	7431	if (ev->next > CurrentTime)
108	michael	4094	break;
109
110	michael	7431	event_delete(ev);
111	michael	4094
112	michael	7431	ev->handler(ev->data);
113	michael	4094
114	michael	7431	if (!ev->oneshot)
115			event_add(ev, ev->data);
116	michael	4094	}
117	adx	30	}
118
119			/*
120	michael	7330	* void event_set_back_events(uintmax_t by)
121	michael	4094	* Input: Time to set back events by.
122			* Output: None.
123			* Side-effects: Sets back all events by "by" seconds.
124	adx	30	*/
125			void
126	michael	7330	event_set_back_events(uintmax_t by)
127	adx	30	{
128	michael	4094	dlink_node *node;
129
130	michael	6370	DLINK_FOREACH(node, event_list.head)
131	michael	4094	{
132			struct event *ev = node->data;
133			ev->next -= by;
134			}
135	adx	30	}