trunk/src/s_bsd_devpoll.c

/*
 *  ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
 *
 *  Copyright (c) 2001-2014 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307
 *  USA
 */

/*! \file s_bsd_devpoll.c
 * \brief /dev/poll compatible network routines.
 * \version $Id$
 */

#include "stdinc.h"
#if USE_IOPOLL_MECHANISM == __IOPOLL_MECHANISM_DEVPOLL
#include <sys/ioctl.h>
/* HPUX uses devpoll.h and not sys/devpoll.h */
#ifdef HAVE_DEVPOLL_H
# include <devpoll.h>
#else
# ifdef HAVE_SYS_DEVPOLL_H
#  include <sys/devpoll.h>
# else
#  error "No devpoll.h found! Try ./configuring and letting the script choose for you."
# endif
#endif
#include "fdlist.h"
#include "ircd.h"
#include "s_bsd.h"
#include "log.h"

static fde_t dpfd;

/*
 * init_netio
 *
 * This is a needed exported function which will be called to initialise
 * the network loop code.
 */
void
init_netio(void)
{
  int fd;

  if ((fd = open("/dev/poll", O_RDWR)) < 0)
  {
    ilog(LOG_TYPE_IRCD, "init_netio: Couldn't open /dev/poll - %d: %s",
         errno, strerror(errno));
    exit(115); /* Whee! */
  }

  fd_open(&dpfd, fd, 0, "/dev/poll file descriptor");
}

/*
 * Write an update to the devpoll filter.
 * See, we end up having to do a seperate (?) remove before we do an
 * add of a new polltype, so we have to have this function seperate from
 * the others.
 */
static void
devpoll_write_update(int fd, int events)
{
  struct pollfd pfd;

  /* Build the pollfd entry */
  pfd.revents = 0;
  pfd.fd = fd;
  pfd.events = events;

  /* Write the thing to our poll fd */
  if (write(dpfd.fd, &pfd, sizeof(pfd)) != sizeof(pfd))
    ilog(LOG_TYPE_IRCD, "devpoll_write_update: dpfd write failed %d: %s",
         errno, strerror(errno));
}

/*
 * comm_setselect
 *
 * This is a needed exported function which will be called to register
 * and deregister interest in a pending IO state for a given FD.
 */
void
comm_setselect(fde_t *F, unsigned int type, PF *handler,
               void *client_data, time_t timeout)
{
  int new_events;

  if ((type & COMM_SELECT_READ))
  {
    F->read_handler = handler;
    F->read_data = client_data;
  }

  if ((type & COMM_SELECT_WRITE))
  {
    F->write_handler = handler;
    F->write_data = client_data;
  }

  new_events = (F->read_handler ? POLLIN : 0) |
    (F->write_handler ? POLLOUT : 0);

  if (timeout != 0)
  {
    F->timeout = CurrentTime + (timeout / 1000);
    F->timeout_handler = handler;
    F->timeout_data = client_data;
  }

  if (new_events != F->evcache)
  {
    devpoll_write_update(F->fd, POLLREMOVE);
    if ((F->evcache = new_events))
      devpoll_write_update(F->fd, new_events);
  }
}

/*
 * comm_select
 *
 * Called to do the new-style IO, courtesy of squid (like most of this
 * new IO code). This routine handles the stuff we've hidden in
 * comm_setselect and fd_table[] and calls callbacks for IO ready
 * events.
 */
void
comm_select(void)
{
  int num, i;
  struct pollfd pollfds[128];
  struct dvpoll dopoll;
  PF *hdl;
  fde_t *F;

  dopoll.dp_timeout = SELECT_DELAY;
  dopoll.dp_nfds = 128;
  dopoll.dp_fds = &pollfds[0];
  num = ioctl(dpfd.fd, DP_POLL, &dopoll);

  set_time();

  if (num < 0)
  {
#ifdef HAVE_USLEEP
    usleep(50000);  /* avoid 99% CPU in comm_select */
#endif
    return;
  }

  for (i = 0; i < num; i++)
  {
    F = lookup_fd(dopoll.dp_fds[i].fd);
    if (F == NULL || !F->flags.open)
      continue;

    if ((dopoll.dp_fds[i].revents & POLLIN))
    {
      if ((hdl = F->read_handler) != NULL)
      {
        F->read_handler = NULL;
        hdl(F, F->read_data);
        if (!F->flags.open)
          continue;
      }
    }

    if ((dopoll.dp_fds[i].revents & POLLOUT))
    {
      if ((hdl = F->write_handler) != NULL)
      {
        F->write_handler = NULL;
        hdl(F, F->write_data);
        if (!F->flags.open)
          continue;
      }
    }

    comm_setselect(F, 0, NULL, NULL, 0);
  }
}
#endif
Revision:	2916
Committed:	Sat Jan 25 21:09:18 2014 UTC (11 years, 7 months ago) by michael
Content type:	text/x-csrc
File size:	4577 byte(s)
Log Message:	- Clean up all files in include/ (fixed indentation, removed whitespaces/tabs) - Fixed copyright years
#	User	Rev	Content
1	adx	30	/*
2	michael	2916	* ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
3	adx	30	*
4	michael	2916	* Copyright (c) 2001-2014 ircd-hybrid development team
5	adx	30	*
6			* 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			* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
19			* USA
20			*/
21
22	michael	2916	/*! \file s_bsd_devpoll.c
23			* \brief /dev/poll compatible network routines.
24			* \version $Id$
25			*/
26
27	adx	30	#include "stdinc.h"
28	stu	908	#if USE_IOPOLL_MECHANISM == __IOPOLL_MECHANISM_DEVPOLL
29	adx	30	#include <sys/ioctl.h>
30			/* HPUX uses devpoll.h and not sys/devpoll.h */
31			#ifdef HAVE_DEVPOLL_H
32			# include <devpoll.h>
33			#else
34			# ifdef HAVE_SYS_DEVPOLL_H
35			# include <sys/devpoll.h>
36			# else
37			# error "No devpoll.h found! Try ./configuring and letting the script choose for you."
38			# endif
39			#endif
40			#include "fdlist.h"
41			#include "ircd.h"
42			#include "s_bsd.h"
43	michael	1309	#include "log.h"
44	adx	30
45			static fde_t dpfd;
46
47			/*
48			* init_netio
49			*
50			* This is a needed exported function which will be called to initialise
51			* the network loop code.
52			*/
53			void
54			init_netio(void)
55			{
56			int fd;
57
58			if ((fd = open("/dev/poll", O_RDWR)) < 0)
59			{
60	michael	1247	ilog(LOG_TYPE_IRCD, "init_netio: Couldn't open /dev/poll - %d: %s",
61	adx	30	errno, strerror(errno));
62			exit(115); /* Whee! */
63			}
64
65			fd_open(&dpfd, fd, 0, "/dev/poll file descriptor");
66			}
67
68			/*
69			* Write an update to the devpoll filter.
70			* See, we end up having to do a seperate (?) remove before we do an
71			* add of a new polltype, so we have to have this function seperate from
72			* the others.
73			*/
74			static void
75			devpoll_write_update(int fd, int events)
76			{
77			struct pollfd pfd;
78
79			/* Build the pollfd entry */
80			pfd.revents = 0;
81			pfd.fd = fd;
82			pfd.events = events;
83
84			/* Write the thing to our poll fd */
85			if (write(dpfd.fd, &pfd, sizeof(pfd)) != sizeof(pfd))
86	michael	1247	ilog(LOG_TYPE_IRCD, "devpoll_write_update: dpfd write failed %d: %s",
87	adx	30	errno, strerror(errno));
88			}
89
90			/*
91			* comm_setselect
92			*
93			* This is a needed exported function which will be called to register
94			* and deregister interest in a pending IO state for a given FD.
95			*/
96			void
97			comm_setselect(fde_t F, unsigned int type, PF handler,
98			void *client_data, time_t timeout)
99			{
100			int new_events;
101
102			if ((type & COMM_SELECT_READ))
103			{
104			F->read_handler = handler;
105			F->read_data = client_data;
106			}
107
108			if ((type & COMM_SELECT_WRITE))
109			{
110			F->write_handler = handler;
111			F->write_data = client_data;
112			}
113
114	adx	282	new_events = (F->read_handler ? POLLIN : 0) \|
115			(F->write_handler ? POLLOUT : 0);
116	adx	30
117			if (timeout != 0)
118	michael	2725	{
119	adx	30	F->timeout = CurrentTime + (timeout / 1000);
120	michael	2725	F->timeout_handler = handler;
121			F->timeout_data = client_data;
122			}
123	adx	30
124			if (new_events != F->evcache)
125			{
126			devpoll_write_update(F->fd, POLLREMOVE);
127			if ((F->evcache = new_events))
128			devpoll_write_update(F->fd, new_events);
129			}
130			}
131
132			/*
133			* comm_select
134			*
135			* Called to do the new-style IO, courtesy of squid (like most of this
136			* new IO code). This routine handles the stuff we've hidden in
137			* comm_setselect and fd_table[] and calls callbacks for IO ready
138			* events.
139			*/
140			void
141			comm_select(void)
142			{
143			int num, i;
144			struct pollfd pollfds[128];
145			struct dvpoll dopoll;
146			PF *hdl;
147			fde_t *F;
148
149			dopoll.dp_timeout = SELECT_DELAY;
150			dopoll.dp_nfds = 128;
151			dopoll.dp_fds = &pollfds[0];
152			num = ioctl(dpfd.fd, DP_POLL, &dopoll);
153
154			set_time();
155
156			if (num < 0)
157			{
158			#ifdef HAVE_USLEEP
159			usleep(50000); /* avoid 99% CPU in comm_select */
160			#endif
161			return;
162			}
163
164			for (i = 0; i < num; i++)
165			{
166			F = lookup_fd(dopoll.dp_fds[i].fd);
167			if (F == NULL \|\| !F->flags.open)
168			continue;
169
170	adx	282	if ((dopoll.dp_fds[i].revents & POLLIN))
171	michael	2650	{
172	adx	30	if ((hdl = F->read_handler) != NULL)
173			{
174			F->read_handler = NULL;
175			hdl(F, F->read_data);
176	adx	242	if (!F->flags.open)
177			continue;
178	adx	30	}
179	michael	2650	}
180	adx	30
181	adx	282	if ((dopoll.dp_fds[i].revents & POLLOUT))
182	michael	2650	{
183	michael	2916	if ((hdl = F->write_handler) != NULL)
184	adx	30	{
185			F->write_handler = NULL;
186			hdl(F, F->write_data);
187	adx	242	if (!F->flags.open)
188			continue;
189	adx	30	}
190	michael	2650	}
191	adx	30
192			comm_setselect(F, 0, NULL, NULL, 0);
193			}
194			}
195	stu	908	#endif