| 1 |
/* |
| 2 |
* ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd) |
| 3 |
* |
| 4 |
* Copyright (c) 2005-2015 ircd-hybrid development team |
| 5 |
* |
| 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 |
| 19 |
* USA |
| 20 |
*/ |
| 21 |
|
| 22 |
/*! \file s_bsd_epoll.c |
| 23 |
* \brief Linux epoll() compatible network routines. |
| 24 |
* \version $Id$ |
| 25 |
*/ |
| 26 |
|
| 27 |
#include "stdinc.h" |
| 28 |
#if USE_IOPOLL_MECHANISM == __IOPOLL_MECHANISM_EPOLL |
| 29 |
#include "fdlist.h" |
| 30 |
#include "ircd.h" |
| 31 |
#include "s_bsd.h" |
| 32 |
#include "log.h" |
| 33 |
#include <sys/epoll.h> |
| 34 |
#include <sys/syscall.h> |
| 35 |
|
| 36 |
static fde_t efd; |
| 37 |
|
| 38 |
|
| 39 |
/* |
| 40 |
* init_netio |
| 41 |
* |
| 42 |
* This is a needed exported function which will be called to initialise |
| 43 |
* the network loop code. |
| 44 |
*/ |
| 45 |
void |
| 46 |
init_netio(void) |
| 47 |
{ |
| 48 |
int fd; |
| 49 |
|
| 50 |
if ((fd = epoll_create(hard_fdlimit)) < 0) |
| 51 |
{ |
| 52 |
ilog(LOG_TYPE_IRCD, "init_netio: Couldn't open epoll fd - %d: %s", |
| 53 |
errno, strerror(errno)); |
| 54 |
exit(115); /* Whee! */ |
| 55 |
} |
| 56 |
|
| 57 |
fd_open(&efd, fd, 0, "epoll file descriptor"); |
| 58 |
} |
| 59 |
|
| 60 |
/* |
| 61 |
* comm_setselect |
| 62 |
* |
| 63 |
* This is a needed exported function which will be called to register |
| 64 |
* and deregister interest in a pending IO state for a given FD. |
| 65 |
*/ |
| 66 |
void |
| 67 |
comm_setselect(fde_t *F, unsigned int type, void (*handler)(fde_t *, void *), |
| 68 |
void *client_data, time_t timeout) |
| 69 |
{ |
| 70 |
int new_events, op; |
| 71 |
struct epoll_event ep_event = { 0, { 0 } }; |
| 72 |
|
| 73 |
if ((type & COMM_SELECT_READ)) |
| 74 |
{ |
| 75 |
F->read_handler = handler; |
| 76 |
F->read_data = client_data; |
| 77 |
} |
| 78 |
|
| 79 |
if ((type & COMM_SELECT_WRITE)) |
| 80 |
{ |
| 81 |
F->write_handler = handler; |
| 82 |
F->write_data = client_data; |
| 83 |
} |
| 84 |
|
| 85 |
new_events = (F->read_handler ? EPOLLIN : 0) | |
| 86 |
(F->write_handler ? EPOLLOUT : 0); |
| 87 |
|
| 88 |
if (timeout != 0) |
| 89 |
{ |
| 90 |
F->timeout = CurrentTime + (timeout / 1000); |
| 91 |
F->timeout_handler = handler; |
| 92 |
F->timeout_data = client_data; |
| 93 |
} |
| 94 |
|
| 95 |
if (new_events != F->evcache) |
| 96 |
{ |
| 97 |
if (new_events == 0) |
| 98 |
op = EPOLL_CTL_DEL; |
| 99 |
else if (F->evcache == 0) |
| 100 |
op = EPOLL_CTL_ADD; |
| 101 |
else |
| 102 |
op = EPOLL_CTL_MOD; |
| 103 |
|
| 104 |
ep_event.events = F->evcache = new_events; |
| 105 |
ep_event.data.fd = F->fd; |
| 106 |
|
| 107 |
if (epoll_ctl(efd.fd, op, F->fd, &ep_event) != 0) |
| 108 |
{ |
| 109 |
ilog(LOG_TYPE_IRCD, "comm_setselect: epoll_ctl() failed: %s", strerror(errno)); |
| 110 |
abort(); |
| 111 |
} |
| 112 |
} |
| 113 |
} |
| 114 |
|
| 115 |
/* |
| 116 |
* comm_select() |
| 117 |
* |
| 118 |
* Called to do the new-style IO, courtesy of of squid (like most of this |
| 119 |
* new IO code). This routine handles the stuff we've hidden in |
| 120 |
* comm_setselect and fd_table[] and calls callbacks for IO ready |
| 121 |
* events. |
| 122 |
*/ |
| 123 |
void |
| 124 |
comm_select(void) |
| 125 |
{ |
| 126 |
struct epoll_event ep_fdlist[128]; |
| 127 |
int num, i; |
| 128 |
void (*hdl)(fde_t *, void *); |
| 129 |
fde_t *F; |
| 130 |
|
| 131 |
num = epoll_wait(efd.fd, ep_fdlist, 128, SELECT_DELAY); |
| 132 |
|
| 133 |
set_time(); |
| 134 |
|
| 135 |
if (num < 0) |
| 136 |
{ |
| 137 |
#ifdef HAVE_USLEEP |
| 138 |
usleep(50000); /* avoid 99% CPU in comm_select */ |
| 139 |
#endif |
| 140 |
return; |
| 141 |
} |
| 142 |
|
| 143 |
for (i = 0; i < num; i++) |
| 144 |
{ |
| 145 |
F = lookup_fd(ep_fdlist[i].data.fd); |
| 146 |
if (F == NULL || !F->flags.open) |
| 147 |
continue; |
| 148 |
|
| 149 |
if ((ep_fdlist[i].events & (EPOLLIN | EPOLLHUP | EPOLLERR))) |
| 150 |
{ |
| 151 |
if ((hdl = F->read_handler)) |
| 152 |
{ |
| 153 |
F->read_handler = NULL; |
| 154 |
hdl(F, F->read_data); |
| 155 |
if (!F->flags.open) |
| 156 |
continue; |
| 157 |
} |
| 158 |
} |
| 159 |
|
| 160 |
if ((ep_fdlist[i].events & (EPOLLOUT | EPOLLHUP | EPOLLERR))) |
| 161 |
{ |
| 162 |
if ((hdl = F->write_handler)) |
| 163 |
{ |
| 164 |
F->write_handler = NULL; |
| 165 |
hdl(F, F->write_data); |
| 166 |
if (!F->flags.open) |
| 167 |
continue; |
| 168 |
} |
| 169 |
} |
| 170 |
|
| 171 |
comm_setselect(F, 0, NULL, NULL, 0); |
| 172 |
} |
| 173 |
} |
| 174 |
#endif |
Parent Directory
| 
Revision Log