server/socket/loop.C

/*
    CrossFire, A Multiplayer game for X-windows

    Copyright (C) 2002-2003 Mark Wedel & The Crossfire Development Team
    Copyright (C) 1992 Frank Tore Johansen

    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., 675 Mass Ave, Cambridge, MA 02139, USA.

    The author can be reached via e-mail to <crossfire@schmorp.de>
*/

/**
 * \file
 * Main client/server loops.
 *
 * \date 2003-12-02
 *
 * loop.c mainly deals with initialization and higher level socket
 * maintanance (checking for lost connections and if data has arrived.)
 */


#include <global.h>
#include <sproto.h>
#include <sockproto.h>

#include <sys/types.h>
#include <sys/time.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>

#include <unistd.h>
#include <arpa/inet.h>

#include <loader.h>

#define MAX_QUEUE_DEPTH   500 //TODO
#define MAX_QUEUE_BACKLOG 5.  //TODO

void
client::reset_state ()
{
  if (!pl)
    return;

  pl->run_on  = 0;
  pl->fire_on = 0;
}

void
client::queue_command (packet_type *handler, char *data, int datalen)
{
  tstamp stamp = now ();

  if (cmd_queue.size () >= MAX_QUEUE_DEPTH)
    {
      //TODO: just disconnect here?
      reset_state ();
      send_packet_printf ("drawinfo %d command queue overflow, ignoring.", NDI_RED);
    }
  else
    {
      cmd_queue.push_back (command ());
      command &cmd = cmd_queue.back ();
      cmd.stamp   = stamp;
      cmd.handler = handler;
      cmd.data    = salloc<char> (datalen + 1, data);
      cmd.datalen = datalen;
    }
}

bool
client::handle_command ()
{
  bool skipping = false;

  while (!cmd_queue.empty ()
         && !(state == ST_PLAYING && pl->ob && pl->ob->speed_left < 0))
    {
      command &cmd = cmd_queue.front ();

      if (cmd.stamp + MAX_QUEUE_BACKLOG < now ())
        {
          if (!skipping)
            {
              skipping = true;
              reset_state ();
              send_packet_printf ("drawinfo %d ignoring delayed commands.", NDI_RED);
            }

          cmd_queue.pop_front ();
        }
      else
        {
          execute (cmd.handler, cmd.data, cmd.datalen);
          cmd_queue.pop_front ();
          return true;
        }
    }

  return false;
}

void
flush_sockets (void)
{
  for (sockvec::iterator i = clients.begin (); i != clients.end (); ++i)
    (*i)->flush ();
}

/**
 * This checks the sockets for input, does the right thing.
 *
 * A bit of this code is grabbed out of socket.c
 * There are 2 lists we need to look through - init_sockets is a list
 * 
 */
void
doeric_server (void)
{
#ifdef CS_LOGSTATS
  if ((time (NULL) - cst_lst.time_start) >= CS_LOGTIME)
    write_cs_stats ();
#endif

  //TODO: should not be done here, either
  for (sockvec::iterator i = clients.begin (); i != clients.end (); ++i)
    {
      client *s = *i;

      if (player *pl = s->pl)
        {
          /* Update the players stats once per tick.  More efficient than
           * sending them whenever they change, and probably just as useful
           */
          esrv_update_stats (pl);

          if (pl->last_weight != -1 && pl->last_weight != WEIGHT (pl->ob))
            {
              esrv_update_item (UPD_WEIGHT, pl->ob, pl->ob);
              if (pl->last_weight != WEIGHT (pl->ob))
                LOG (llevError, "esrv_update_item(UPD_WEIGHT) did not set player weight: is %lu, should be %lu\n",
                     (unsigned long) pl->last_weight, WEIGHT (pl->ob));
            }

          draw_client_map (pl->ob);

          if (s->update_look)
            esrv_draw_look (pl->ob);
        }

      s->refcnt_chk ();
    }
}

Revision:	1.33
Committed:	Mon Dec 25 11:25:50 2006 UTC (17 years, 4 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.32:	+4 -19 lines
Log Message:	- small, but subtle, rewrite of object management - perl will now keep attachable objects alive - objects are now refcounted - refcouts need to be tested explicitly (refcnt_chk) - explicit destroy is required current - explicit destroy asks "nicely" for the object to self destruct, if possible - refcounts will be used during mortal killing - minor bugfixes, optimisations etc. - some former hacks removed.
#	Content
1	/*
2	CrossFire, A Multiplayer game for X-windows
3
4	Copyright (C) 2002-2003 Mark Wedel & The Crossfire Development Team
5	Copyright (C) 1992 Frank Tore Johansen
6
7	This program is free software; you can redistribute it and/or modify
8	it under the terms of the GNU General Public License as published by
9	the Free Software Foundation; either version 2 of the License, or
10	(at your option) any later version.
11
12	This program is distributed in the hope that it will be useful,
13	but WITHOUT ANY WARRANTY; without even the implied warranty of
14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15	GNU General Public License for more details.
16
17	You should have received a copy of the GNU General Public License
18	along with this program; if not, write to the Free Software
19	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20
21	The author can be reached via e-mail to <crossfire@schmorp.de>
22	*/
23
24	/**
25	* \file
26	* Main client/server loops.
27	*
28	* \date 2003-12-02
29	*
30	* loop.c mainly deals with initialization and higher level socket
31	* maintanance (checking for lost connections and if data has arrived.)
32	*/
33
34
35	#include <global.h>
36	#include <sproto.h>
37	#include <sockproto.h>
38
39	#include <sys/types.h>
40	#include <sys/time.h>
41	#include <sys/socket.h>
42	#include <netinet/in.h>
43	#include <netdb.h>
44
45	#include <unistd.h>
46	#include <arpa/inet.h>
47
48	#include <loader.h>
49
50	#define MAX_QUEUE_DEPTH 500 //TODO
51	#define MAX_QUEUE_BACKLOG 5. //TODO
52
53	void
54	client::reset_state ()
55	{
56	if (!pl)
57	return;
58
59	pl->run_on = 0;
60	pl->fire_on = 0;
61	}
62
63	void
64	client::queue_command (packet_type handler, char data, int datalen)
65	{
66	tstamp stamp = now ();
67
68	if (cmd_queue.size () >= MAX_QUEUE_DEPTH)
69	{
70	//TODO: just disconnect here?
71	reset_state ();
72	send_packet_printf ("drawinfo %d command queue overflow, ignoring.", NDI_RED);
73	}
74	else
75	{
76	cmd_queue.push_back (command ());
77	command &cmd = cmd_queue.back ();
78	cmd.stamp = stamp;
79	cmd.handler = handler;
80	cmd.data = salloc<char> (datalen + 1, data);
81	cmd.datalen = datalen;
82	}
83	}
84
85	bool
86	client::handle_command ()
87	{
88	bool skipping = false;
89
90	while (!cmd_queue.empty ()
91	&& !(state == ST_PLAYING && pl->ob && pl->ob->speed_left < 0))
92	{
93	command &cmd = cmd_queue.front ();
94
95	if (cmd.stamp + MAX_QUEUE_BACKLOG < now ())
96	{
97	if (!skipping)
98	{
99	skipping = true;
100	reset_state ();
101	send_packet_printf ("drawinfo %d ignoring delayed commands.", NDI_RED);
102	}
103
104	cmd_queue.pop_front ();
105	}
106	else
107	{
108	execute (cmd.handler, cmd.data, cmd.datalen);
109	cmd_queue.pop_front ();
110	return true;
111	}
112	}
113
114	return false;
115	}
116
117	void
118	flush_sockets (void)
119	{
120	for (sockvec::iterator i = clients.begin (); i != clients.end (); ++i)
121	(*i)->flush ();
122	}
123
124	/**
125	* This checks the sockets for input, does the right thing.
126	*
127	* A bit of this code is grabbed out of socket.c
128	* There are 2 lists we need to look through - init_sockets is a list
129	*
130	*/
131	void
132	doeric_server (void)
133	{
134	#ifdef CS_LOGSTATS
135	if ((time (NULL) - cst_lst.time_start) >= CS_LOGTIME)
136	write_cs_stats ();
137	#endif
138
139	//TODO: should not be done here, either
140	for (sockvec::iterator i = clients.begin (); i != clients.end (); ++i)
141	{
142	client s = i;
143
144	if (player *pl = s->pl)
145	{
146	/* Update the players stats once per tick. More efficient than
147	* sending them whenever they change, and probably just as useful
148	*/
149	esrv_update_stats (pl);
150
151	if (pl->last_weight != -1 && pl->last_weight != WEIGHT (pl->ob))
152	{
153	esrv_update_item (UPD_WEIGHT, pl->ob, pl->ob);
154	if (pl->last_weight != WEIGHT (pl->ob))
155	LOG (llevError, "esrv_update_item(UPD_WEIGHT) did not set player weight: is %lu, should be %lu\n",
156	(unsigned long) pl->last_weight, WEIGHT (pl->ob));
157	}
158
159	draw_client_map (pl->ob);
160
161	if (s->update_look)
162	esrv_draw_look (pl->ob);
163	}
164
165	s->refcnt_chk ();
166	}
167	}
168