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/* |
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* ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd) |
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* |
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* Copyright (c) 2000-2015 ircd-hybrid development team |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 |
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* USA |
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*/ |
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|
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/*! \file s_bsd_kqueue.c |
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* \brief kqueue() compatible network routines. |
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* \version $Id$ |
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*/ |
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|
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#include "stdinc.h" |
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#if USE_IOPOLL_MECHANISM == __IOPOLL_MECHANISM_KQUEUE |
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#include <sys/event.h> |
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#include "fdlist.h" |
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#include "ircd.h" |
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#include "s_bsd.h" |
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#include "log.h" |
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|
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#define KE_LENGTH 128 |
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|
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static fde_t kqfd; |
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static struct kevent kq_fdlist[KE_LENGTH]; /* kevent buffer */ |
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static int kqoff; /* offset into the buffer */ |
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|
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|
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/* |
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* init_netio |
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* |
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* This is a needed exported function which will be called to initialise |
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* the network loop code. |
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*/ |
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void |
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init_netio(void) |
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{ |
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int fd; |
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|
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if ((fd = kqueue()) < 0) |
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{ |
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ilog(LOG_TYPE_IRCD, "init_netio: Couldn't open kqueue fd!"); |
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exit(115); /* Whee! */ |
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} |
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|
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fd_open(&kqfd, fd, 0, "kqueue() file descriptor"); |
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} |
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|
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/* |
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* Write a single update to the kqueue list. |
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*/ |
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static void |
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kq_update_events(int fd, int filter, int what) |
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{ |
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static struct timespec zero_timespec = {0, 0}; |
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struct kevent *kep = kq_fdlist + kqoff; |
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|
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EV_SET(kep, (uintptr_t) fd, (short) filter, what, 0, 0, NULL); |
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|
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if (++kqoff == KE_LENGTH) |
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{ |
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int i; |
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|
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for (i = 0; i < kqoff; ++i) |
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kevent(kqfd.fd, &kq_fdlist[i], 1, NULL, 0, &zero_timespec); |
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kqoff = 0; |
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} |
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} |
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|
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/* |
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* comm_setselect |
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* |
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* This is a needed exported function which will be called to register |
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* and deregister interest in a pending IO state for a given FD. |
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*/ |
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void |
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comm_setselect(fde_t *F, unsigned int type, void (*handler)(fde_t *, void *), |
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void *client_data, time_t timeout) |
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{ |
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int new_events, diff; |
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|
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if ((type & COMM_SELECT_READ)) |
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{ |
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F->read_handler = handler; |
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F->read_data = client_data; |
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} |
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|
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if ((type & COMM_SELECT_WRITE)) |
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{ |
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F->write_handler = handler; |
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F->write_data = client_data; |
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} |
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|
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new_events = (F->read_handler ? COMM_SELECT_READ : 0) | |
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(F->write_handler ? COMM_SELECT_WRITE : 0); |
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|
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if (timeout != 0) |
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{ |
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F->timeout = CurrentTime + (timeout / 1000); |
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F->timeout_handler = handler; |
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F->timeout_data = client_data; |
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} |
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|
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diff = new_events ^ F->evcache; |
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|
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if ((diff & COMM_SELECT_READ)) |
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kq_update_events(F->fd, EVFILT_READ, |
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(new_events & COMM_SELECT_READ) ? EV_ADD : EV_DELETE); |
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if ((diff & COMM_SELECT_WRITE)) |
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kq_update_events(F->fd, EVFILT_WRITE, |
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(new_events & COMM_SELECT_WRITE) ? EV_ADD : EV_DELETE); |
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|
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F->evcache = new_events; |
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} |
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|
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/* |
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* comm_select |
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* |
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* Called to do the new-style IO, courtesy of squid (like most of this |
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* new IO code). This routine handles the stuff we've hidden in |
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* comm_setselect and fd_table[] and calls callbacks for IO ready |
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* events. |
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*/ |
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void |
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comm_select(void) |
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{ |
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int num, i; |
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static struct kevent ke[KE_LENGTH]; |
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struct timespec poll_time; |
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void (*hdl)(fde_t *, void *); |
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fde_t *F; |
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|
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/* |
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* remember we are doing NANOseconds here, not micro/milli. God knows |
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* why jlemon used a timespec, but hey, he wrote the interface, not I |
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* -- Adrian |
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*/ |
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poll_time.tv_sec = 0; |
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poll_time.tv_nsec = SELECT_DELAY * 1000000; |
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num = kevent(kqfd.fd, kq_fdlist, kqoff, ke, KE_LENGTH, &poll_time); |
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kqoff = 0; |
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|
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set_time(); |
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|
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if (num < 0) |
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{ |
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#ifdef HAVE_USLEEP |
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usleep(50000); /* avoid 99% CPU in comm_select */ |
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#endif |
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return; |
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} |
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|
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for (i = 0; i < num; i++) |
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{ |
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F = lookup_fd(ke[i].ident); |
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if (F == NULL || !F->flags.open || (ke[i].flags & EV_ERROR)) |
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continue; |
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|
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if (ke[i].filter == EVFILT_READ) |
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{ |
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if ((hdl = F->read_handler) != NULL) |
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{ |
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F->read_handler = NULL; |
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hdl(F, F->read_data); |
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if (!F->flags.open) |
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continue; |
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} |
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} |
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|
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if (ke[i].filter == EVFILT_WRITE) |
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{ |
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if ((hdl = F->write_handler) != NULL) |
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{ |
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F->write_handler = NULL; |
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hdl(F, F->write_data); |
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if (!F->flags.open) |
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continue; |
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} |
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} |
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|
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comm_setselect(F, 0, NULL, NULL, 0); |
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} |
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} |
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#endif |
