trunk/src/s_bsd_epoll.c

/*
 *  ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
 *
 *  Copyright (c) 2005-2014 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_epoll.c
 * \brief Linux epoll() compatible network routines.
 * \version $Id$
 */

#include "stdinc.h"
#if USE_IOPOLL_MECHANISM == __IOPOLL_MECHANISM_EPOLL
#include "fdlist.h"
#include "ircd.h"
#include "memory.h"
#include "s_bsd.h"
#include "log.h"
#include <sys/epoll.h>
#include <sys/syscall.h>

static fde_t efd;


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

  fd_open(&efd, fd, 0, "epoll file descriptor");
}

/*
 * 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, op;
  struct epoll_event ep_event = { 0, { 0 } };

  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 ? EPOLLIN : 0) |
    (F->write_handler ? EPOLLOUT : 0);

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

  if (new_events != F->evcache)
  {
    if (new_events == 0)
      op = EPOLL_CTL_DEL;
    else if (F->evcache == 0)
      op = EPOLL_CTL_ADD;
    else
      op = EPOLL_CTL_MOD;

    ep_event.events = F->evcache = new_events;
    ep_event.data.fd = F->fd;

    if (epoll_ctl(efd.fd, op, F->fd, &ep_event) != 0)
    {
      ilog(LOG_TYPE_IRCD, "comm_setselect: epoll_ctl() failed: %s", strerror(errno));
      abort();
    }
  }
}

/*
 * comm_select()
 *
 * Called to do the new-style IO, courtesy of 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)
{
  struct epoll_event ep_fdlist[128];
  int num, i;
  PF *hdl;
  fde_t *F;

  num = epoll_wait(efd.fd, ep_fdlist, 128, SELECT_DELAY);

  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(ep_fdlist[i].data.fd);
    if (F == NULL || !F->flags.open)
      continue;

    if ((ep_fdlist[i].events & (EPOLLIN | EPOLLHUP | EPOLLERR)))
    {
      if ((hdl = F->read_handler) != NULL)
      {
        F->read_handler = NULL;
        hdl(F, F->read_data);
        if (!F->flags.open)
          continue;
      }
    }

    if ((ep_fdlist[i].events & (EPOLLOUT | EPOLLHUP | EPOLLERR)))
    {
      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:	3984
Committed:	Wed Jun 18 13:24:34 2014 UTC (11 years, 2 months ago) by michael
Content type:	text/x-csrc
File size:	4044 byte(s)
Log Message:	- s_bsd_epoll.c, s_bsd_kqueue.c: removed defines/prototypes for extremely outdated systems
#	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) 2005-2014 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_epoll.c
23			* \brief Linux epoll() compatible network routines.
24			* \version $Id$
25			*/
26
27	adx	30	#include "stdinc.h"
28	stu	908	#if USE_IOPOLL_MECHANISM == __IOPOLL_MECHANISM_EPOLL
29	adx	30	#include "fdlist.h"
30			#include "ircd.h"
31			#include "memory.h"
32			#include "s_bsd.h"
33	michael	1309	#include "log.h"
34	adx	30	#include <sys/epoll.h>
35			#include <sys/syscall.h>
36
37			static fde_t efd;
38
39
40			/*
41			* init_netio
42			*
43			* This is a needed exported function which will be called to initialise
44			* the network loop code.
45			*/
46			void
47			init_netio(void)
48			{
49			int fd;
50
51			if ((fd = epoll_create(hard_fdlimit)) < 0)
52			{
53	michael	1247	ilog(LOG_TYPE_IRCD, "init_netio: Couldn't open epoll fd - %d: %s",
54	adx	30	errno, strerror(errno));
55			exit(115); /* Whee! */
56			}
57
58			fd_open(&efd, fd, 0, "epoll file descriptor");
59			}
60
61			/*
62			* comm_setselect
63			*
64			* This is a needed exported function which will be called to register
65			* and deregister interest in a pending IO state for a given FD.
66			*/
67			void
68			comm_setselect(fde_t F, unsigned int type, PF handler,
69			void *client_data, time_t timeout)
70			{
71			int new_events, op;
72	michael	966	struct epoll_event ep_event = { 0, { 0 } };
73	adx	30
74			if ((type & COMM_SELECT_READ))
75			{
76			F->read_handler = handler;
77			F->read_data = client_data;
78			}
79
80			if ((type & COMM_SELECT_WRITE))
81			{
82			F->write_handler = handler;
83			F->write_data = client_data;
84			}
85
86			new_events = (F->read_handler ? EPOLLIN : 0) \|
87			(F->write_handler ? EPOLLOUT : 0);
88
89			if (timeout != 0)
90	michael	2725	{
91	adx	30	F->timeout = CurrentTime + (timeout / 1000);
92	michael	2725	F->timeout_handler = handler;
93			F->timeout_data = client_data;
94			}
95	adx	30
96			if (new_events != F->evcache)
97			{
98			if (new_events == 0)
99			op = EPOLL_CTL_DEL;
100			else if (F->evcache == 0)
101			op = EPOLL_CTL_ADD;
102			else
103			op = EPOLL_CTL_MOD;
104
105			ep_event.events = F->evcache = new_events;
106			ep_event.data.fd = F->fd;
107
108			if (epoll_ctl(efd.fd, op, F->fd, &ep_event) != 0)
109			{
110	michael	1247	ilog(LOG_TYPE_IRCD, "comm_setselect: epoll_ctl() failed: %s", strerror(errno));
111	adx	30	abort();
112			}
113			}
114			}
115
116			/*
117			* comm_select()
118			*
119			* Called to do the new-style IO, courtesy of of squid (like most of this
120			* new IO code). This routine handles the stuff we've hidden in
121			* comm_setselect and fd_table[] and calls callbacks for IO ready
122			* events.
123			*/
124			void
125			comm_select(void)
126			{
127			struct epoll_event ep_fdlist[128];
128			int num, i;
129			PF *hdl;
130			fde_t *F;
131
132			num = epoll_wait(efd.fd, ep_fdlist, 128, SELECT_DELAY);
133
134			set_time();
135
136			if (num < 0)
137			{
138			#ifdef HAVE_USLEEP
139			usleep(50000); /* avoid 99% CPU in comm_select */
140			#endif
141			return;
142			}
143
144			for (i = 0; i < num; i++)
145			{
146			F = lookup_fd(ep_fdlist[i].data.fd);
147			if (F == NULL \|\| !F->flags.open)
148			continue;
149
150			if ((ep_fdlist[i].events & (EPOLLIN \| EPOLLHUP \| EPOLLERR)))
151	michael	2650	{
152	adx	30	if ((hdl = F->read_handler) != NULL)
153			{
154			F->read_handler = NULL;
155			hdl(F, F->read_data);
156	michael	2650	if (!F->flags.open)
157			continue;
158	adx	30	}
159	michael	2650	}
160	adx	30
161			if ((ep_fdlist[i].events & (EPOLLOUT \| EPOLLHUP \| EPOLLERR)))
162	michael	2650	{
163	adx	30	if ((hdl = F->write_handler) != NULL)
164			{
165			F->write_handler = NULL;
166			hdl(F, F->write_data);
167	michael	2650	if (!F->flags.open)
168			continue;
169	adx	30	}
170	michael	2650	}
171	adx	30
172			comm_setselect(F, 0, NULL, NULL, 0);
173			}
174			}
175	stu	908	#endif