trunk/src/s_bsd_kqueue.c

/*
 *  ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
 *
 *  Copyright (c) 2000-2014 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_kqueue.c
 * \brief kqueue() compatible network routines.
 * \version $Id$
 */

#include "stdinc.h"
#if USE_IOPOLL_MECHANISM == __IOPOLL_MECHANISM_KQUEUE
#include <sys/event.h>
#include "fdlist.h"
#include "ircd.h"
#include "memory.h"
#include "s_bsd.h"
#include "log.h"

#define KE_LENGTH 128

static fde_t kqfd;
static struct kevent kq_fdlist[KE_LENGTH];  /* kevent buffer */
static int kqoff;      /* offset into the buffer */


/*
 * 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 = kqueue()) < 0)
  {
    ilog(LOG_TYPE_IRCD, "init_netio: Couldn't open kqueue fd!");
    exit(115); /* Whee! */
  }

  fd_open(&kqfd, fd, 0, "kqueue() file descriptor");
}

/*
 * Write a single update to the kqueue list.
 */
static void
kq_update_events(int fd, int filter, int what)
{
  static struct timespec zero_timespec = {0, 0};
  struct kevent *kep = kq_fdlist + kqoff;

  EV_SET(kep, (uintptr_t) fd, (short) filter, what, 0, 0, NULL);

  if (++kqoff == KE_LENGTH)
  {
    int i;

    for (i = 0; i < kqoff; ++i)
      kevent(kqfd.fd, &kq_fdlist[i], 1, NULL, 0, &zero_timespec);
    kqoff = 0;
  }
}

/*
 * 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, diff;

  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 ? COMM_SELECT_READ : 0) |
               (F->write_handler ? COMM_SELECT_WRITE : 0);

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

  diff = new_events ^ F->evcache;

  if ((diff & COMM_SELECT_READ))
    kq_update_events(F->fd, EVFILT_READ,
      (new_events & COMM_SELECT_READ) ? EV_ADD : EV_DELETE);
  if ((diff & COMM_SELECT_WRITE))
    kq_update_events(F->fd, EVFILT_WRITE,
      (new_events & COMM_SELECT_WRITE) ? EV_ADD : EV_DELETE);

  F->evcache = 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;
  static struct kevent ke[KE_LENGTH];
  struct timespec poll_time;
  PF *hdl;
  fde_t *F;

  /*
   * remember we are doing NANOseconds here, not micro/milli. God knows
   * why jlemon used a timespec, but hey, he wrote the interface, not I
   *   -- Adrian
   */
  poll_time.tv_sec = 0;
  poll_time.tv_nsec = SELECT_DELAY * 1000000;
  num = kevent(kqfd.fd, kq_fdlist, kqoff, ke, KE_LENGTH, &poll_time);
  kqoff = 0;

  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(ke[i].ident);
    if (F == NULL || !F->flags.open || (ke[i].flags & EV_ERROR))
      continue;

    if (ke[i].filter == EVFILT_READ)
    {
      if ((hdl = F->read_handler) != NULL)
      {
        F->read_handler = NULL;
        hdl(F, F->read_data);
        if (!F->flags.open)
          continue;
      }
    }

    if (ke[i].filter == EVFILT_WRITE)
    {
      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:	4685 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) 2000-2014 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_kqueue.c
23			* \brief kqueue() compatible network routines.
24			* \version $Id$
25			*/
26
27	adx	30	#include "stdinc.h"
28	stu	908	#if USE_IOPOLL_MECHANISM == __IOPOLL_MECHANISM_KQUEUE
29	adx	30	#include <sys/event.h>
30			#include "fdlist.h"
31			#include "ircd.h"
32			#include "memory.h"
33			#include "s_bsd.h"
34	michael	1309	#include "log.h"
35	adx	30
36			#define KE_LENGTH 128
37
38			static fde_t kqfd;
39			static struct kevent kq_fdlist[KE_LENGTH]; /* kevent buffer */
40			static int kqoff; /* offset into the buffer */
41
42	michael	3984
43	adx	30	/*
44			* init_netio
45			*
46			* This is a needed exported function which will be called to initialise
47			* the network loop code.
48			*/
49			void
50			init_netio(void)
51			{
52			int fd;
53
54			if ((fd = kqueue()) < 0)
55			{
56	michael	1247	ilog(LOG_TYPE_IRCD, "init_netio: Couldn't open kqueue fd!");
57	adx	30	exit(115); /* Whee! */
58			}
59
60			fd_open(&kqfd, fd, 0, "kqueue() file descriptor");
61			}
62
63			/*
64			* Write a single update to the kqueue list.
65			*/
66			static void
67			kq_update_events(int fd, int filter, int what)
68			{
69			static struct timespec zero_timespec = {0, 0};
70			struct kevent *kep = kq_fdlist + kqoff;
71
72			EV_SET(kep, (uintptr_t) fd, (short) filter, what, 0, 0, NULL);
73
74	adx	842	if (++kqoff == KE_LENGTH)
75	adx	30	{
76	michael	2589	int i;
77
78			for (i = 0; i < kqoff; ++i)
79	michael	2613	kevent(kqfd.fd, &kq_fdlist[i], 1, NULL, 0, &zero_timespec);
80	adx	30	kqoff = 0;
81			}
82			}
83
84			/*
85			* comm_setselect
86			*
87			* This is a needed exported function which will be called to register
88			* and deregister interest in a pending IO state for a given FD.
89			*/
90			void
91			comm_setselect(fde_t F, unsigned int type, PF handler,
92			void *client_data, time_t timeout)
93			{
94			int new_events, diff;
95
96			if ((type & COMM_SELECT_READ))
97			{
98			F->read_handler = handler;
99			F->read_data = client_data;
100			}
101
102			if ((type & COMM_SELECT_WRITE))
103			{
104			F->write_handler = handler;
105			F->write_data = client_data;
106			}
107
108			new_events = (F->read_handler ? COMM_SELECT_READ : 0) \|
109	michael	2650	(F->write_handler ? COMM_SELECT_WRITE : 0);
110	adx	30
111			if (timeout != 0)
112	michael	2725	{
113	adx	30	F->timeout = CurrentTime + (timeout / 1000);
114	michael	2725	F->timeout_handler = handler;
115			F->timeout_data = client_data;
116			}
117	adx	30
118			diff = new_events ^ F->evcache;
119
120			if ((diff & COMM_SELECT_READ))
121			kq_update_events(F->fd, EVFILT_READ,
122			(new_events & COMM_SELECT_READ) ? EV_ADD : EV_DELETE);
123			if ((diff & COMM_SELECT_WRITE))
124			kq_update_events(F->fd, EVFILT_WRITE,
125			(new_events & COMM_SELECT_WRITE) ? EV_ADD : EV_DELETE);
126
127			F->evcache = new_events;
128			}
129
130			/*
131			* comm_select
132			*
133			* Called to do the new-style IO, courtesy of squid (like most of this
134			* new IO code). This routine handles the stuff we've hidden in
135			* comm_setselect and fd_table[] and calls callbacks for IO ready
136			* events.
137			*/
138			void
139			comm_select(void)
140			{
141			int num, i;
142			static struct kevent ke[KE_LENGTH];
143			struct timespec poll_time;
144			PF *hdl;
145			fde_t *F;
146
147			/*
148			* remember we are doing NANOseconds here, not micro/milli. God knows
149			* why jlemon used a timespec, but hey, he wrote the interface, not I
150			* -- Adrian
151			*/
152			poll_time.tv_sec = 0;
153			poll_time.tv_nsec = SELECT_DELAY * 1000000;
154			num = kevent(kqfd.fd, kq_fdlist, kqoff, ke, KE_LENGTH, &poll_time);
155			kqoff = 0;
156
157			set_time();
158
159			if (num < 0)
160			{
161			#ifdef HAVE_USLEEP
162			usleep(50000); /* avoid 99% CPU in comm_select */
163			#endif
164			return;
165			}
166
167			for (i = 0; i < num; i++)
168			{
169			F = lookup_fd(ke[i].ident);
170			if (F == NULL \|\| !F->flags.open \|\| (ke[i].flags & EV_ERROR))
171			continue;
172
173			if (ke[i].filter == EVFILT_READ)
174	michael	2650	{
175	adx	30	if ((hdl = F->read_handler) != NULL)
176			{
177			F->read_handler = NULL;
178			hdl(F, F->read_data);
179	michael	2614	if (!F->flags.open)
180			continue;
181	adx	30	}
182	michael	2650	}
183	adx	30
184			if (ke[i].filter == EVFILT_WRITE)
185	michael	2650	{
186	adx	30	if ((hdl = F->write_handler) != NULL)
187			{
188			F->write_handler = NULL;
189			hdl(F, F->write_data);
190	michael	2614	if (!F->flags.open)
191			continue;
192	adx	30	}
193	michael	2650	}
194	adx	30
195			comm_setselect(F, 0, NULL, NULL, 0);
196			}
197			}
198	stu	908	#endif