server/server/evthread.C

/*
 * This file is part of Deliantra, the Roguelike Realtime MMORPG.
 * 
 * Copyright (©) 2008 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
 * 
 * Deliantra 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 3 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, see <http://www.gnu.org/licenses/>.
 * 
 * The authors can be reached via e-mail to <support@deliantra.net>
 */

#include "global.h"
#include "evthread.h"
#include "cfperl.h"

thread evthread;
static ev_loop *loop;

#define TICK_CYCLES 4

// the tick watcher is activated every TICK_CYCLES
ev_async tick_watcher;
EV_ATOMIC_T coroapi::cede_pending;

// the ticker runs TICK_CYCLES times as fast as the main server tick
static ev_periodic cede_watcher;

/////////////////////////////////////////////////////////////////////////////

// it is a bit silly to have to use a mutex, but contention
// is basically non-existant, favouring good mutex implementations.
static SMUTEX (evthread_mutex);
static NV next_tick;

NV get_next_tick ()
{
  SMUTEX_LOCK (evthread_mutex);
  NV retval = next_tick;
  SMUTEX_UNLOCK (evthread_mutex);
  return retval;
}

static void
cede_cb (EV_P_ ev_periodic *w, int revents)
{
  static int cycle = 0;

  if (++cycle == TICK_CYCLES)
    {
      cycle = 0;

      SMUTEX_LOCK (evthread_mutex);
      next_tick = w->at + TICK / TICK_CYCLES * (TICK_CYCLES - 1);
      SMUTEX_UNLOCK (evthread_mutex);

      ev_async_send (EV_DEFAULT_UC, &tick_watcher);
    }

  coroapi::cede_pending = 1;
}

static void
tick_cb (EV_P_ ev_async *w, int revents)
{
  cfperl_tick ();
}

/////////////////////////////////////////////////////////////////////////////

static ev_async async_watcher;
static ev_io aio1_watcher;
static ev_idle aio2_watcher;
static EV_ATOMIC_T aio_pending;

static void
aio2_cb (EV_P_ ev_idle *w, int revents)
{
  CALL_BEGIN (0);
  CALL_CALL ("IO::AIO::poll_cb", G_SCALAR);

  fprintf (stderr, "pollcb %d\n", count ? TOPi : 0);//D
  if (count > 0 && TOPi < 0)
    ev_idle_start (EV_A, w);
  else
    ev_idle_stop (EV_A, w);

  CALL_END;
}

static void
async_cb (EV_P_ ev_async *w, int revents)
{
  aio2_cb (EV_A, &aio2_watcher, 0);
}

static void
aio1_cb (EV_P_ ev_io *w, int revents)
{
  char dummy;
  ev_io_stop (EV_A, w);//D
  return;

  if (read (w->fd, &dummy, 1) > 0)
    {
  fprintf (stderr, "async\n");//D
      ev_async_send (EV_DEFAULT_UC, &async_watcher);
      coroapi::cede_pending = 1;
    }
}

/////////////////////////////////////////////////////////////////////////////

static void *
evthread_proc (void *arg)
{
  ev_loop (loop, 0);

  return 0;
}

void evthread_start (int aiofd)
{
  I_EV_API ("evthread");

  // main loop
  ev_async_init (&tick_watcher, tick_cb);
  ev_set_priority (&tick_watcher, 1);
  ev_async_start (EV_DEFAULT_UC, &tick_watcher);

  ev_async_init (&async_watcher, async_cb);
  ev_set_priority (&async_watcher, 1);
  ev_async_start (EV_DEFAULT_UC, &async_watcher);

  ev_idle_init (&aio2_watcher, aio2_cb);

  // secondary loop
  loop = ev_loop_new (0);

  ev_periodic_init (&cede_watcher, cede_cb, 0, TICK / TICK_CYCLES, 0);
  ev_periodic_start (loop, &cede_watcher);

  ev_io_init (&aio1_watcher, aio1_cb, aiofd, EV_READ);
  ev_io_start (loop, &aio1_watcher);

  evthread.start (evthread_proc);
}


Revision:	1.5
Committed:	Thu May 29 03:27:37 2008 UTC (16 years ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.4:	+5 -1 lines
Log Message:	* empty log message *
#	Content
1	/*
2	* This file is part of Deliantra, the Roguelike Realtime MMORPG.
3	*
4	* Copyright (©) 2008 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
5	*
6	* Deliantra 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 3 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, see <http://www.gnu.org/licenses/>.
18	*
19	* The authors can be reached via e-mail to <support@deliantra.net>
20	*/
21
22	#include "global.h"
23	#include "evthread.h"
24	#include "cfperl.h"
25
26	thread evthread;
27	static ev_loop *loop;
28
29	#define TICK_CYCLES 4
30
31	// the tick watcher is activated every TICK_CYCLES
32	ev_async tick_watcher;
33	EV_ATOMIC_T coroapi::cede_pending;
34
35	// the ticker runs TICK_CYCLES times as fast as the main server tick
36	static ev_periodic cede_watcher;
37
38	/////////////////////////////////////////////////////////////////////////////
39
40	// it is a bit silly to have to use a mutex, but contention
41	// is basically non-existant, favouring good mutex implementations.
42	static SMUTEX (evthread_mutex);
43	static NV next_tick;
44
45	NV get_next_tick ()
46	{
47	SMUTEX_LOCK (evthread_mutex);
48	NV retval = next_tick;
49	SMUTEX_UNLOCK (evthread_mutex);
50	return retval;
51	}
52
53	static void
54	cede_cb (EV_P_ ev_periodic *w, int revents)
55	{
56	static int cycle = 0;
57
58	if (++cycle == TICK_CYCLES)
59	{
60	cycle = 0;
61
62	SMUTEX_LOCK (evthread_mutex);
63	next_tick = w->at + TICK / TICK_CYCLES * (TICK_CYCLES - 1);
64	SMUTEX_UNLOCK (evthread_mutex);
65
66	ev_async_send (EV_DEFAULT_UC, &tick_watcher);
67	}
68
69	coroapi::cede_pending = 1;
70	}
71
72	static void
73	tick_cb (EV_P_ ev_async *w, int revents)
74	{
75	cfperl_tick ();
76	}
77
78	/////////////////////////////////////////////////////////////////////////////
79
80	static ev_async async_watcher;
81	static ev_io aio1_watcher;
82	static ev_idle aio2_watcher;
83	static EV_ATOMIC_T aio_pending;
84
85	static void
86	aio2_cb (EV_P_ ev_idle *w, int revents)
87	{
88	CALL_BEGIN (0);
89	CALL_CALL ("IO::AIO::poll_cb", G_SCALAR);
90
91	fprintf (stderr, "pollcb %d\n", count ? TOPi : 0);//D
92	if (count > 0 && TOPi < 0)
93	ev_idle_start (EV_A, w);
94	else
95	ev_idle_stop (EV_A, w);
96
97	CALL_END;
98	}
99
100	static void
101	async_cb (EV_P_ ev_async *w, int revents)
102	{
103	aio2_cb (EV_A, &aio2_watcher, 0);
104	}
105
106	static void
107	aio1_cb (EV_P_ ev_io *w, int revents)
108	{
109	char dummy;
110	ev_io_stop (EV_A, w);//D
111	return;
112
113	if (read (w->fd, &dummy, 1) > 0)
114	{
115	fprintf (stderr, "async\n");//D
116	ev_async_send (EV_DEFAULT_UC, &async_watcher);
117	coroapi::cede_pending = 1;
118	}
119	}
120
121	/////////////////////////////////////////////////////////////////////////////
122
123	static void *
124	evthread_proc (void *arg)
125	{
126	ev_loop (loop, 0);
127
128	return 0;
129	}
130
131	void evthread_start (int aiofd)
132	{
133	I_EV_API ("evthread");
134
135	// main loop
136	ev_async_init (&tick_watcher, tick_cb);
137	ev_set_priority (&tick_watcher, 1);
138	ev_async_start (EV_DEFAULT_UC, &tick_watcher);
139
140	ev_async_init (&async_watcher, async_cb);
141	ev_set_priority (&async_watcher, 1);
142	ev_async_start (EV_DEFAULT_UC, &async_watcher);
143
144	ev_idle_init (&aio2_watcher, aio2_cb);
145
146	// secondary loop
147	loop = ev_loop_new (0);
148
149	ev_periodic_init (&cede_watcher, cede_cb, 0, TICK / TICK_CYCLES, 0);
150	ev_periodic_start (loop, &cede_watcher);
151
152	ev_io_init (&aio1_watcher, aio1_cb, aiofd, EV_READ);
153	ev_io_start (loop, &aio1_watcher);
154
155	evthread.start (evthread_proc);
156	}
157
158
159