ViewVC Help
View File | Revision Log | Show Annotations | Download File
/cvs/libev/ev_epoll.c
(Generate patch)

Comparing libev/ev_epoll.c (file contents):
Revision 1.2 by root, Tue Oct 30 23:54:38 2007 UTC vs.
Revision 1.8 by root, Thu Nov 1 11:11:22 2007 UTC

1/*
2 * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met:
8 *
9 * * Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 *
12 * * Redistributions in binary form must reproduce the above
13 * copyright notice, this list of conditions and the following
14 * disclaimer in the documentation and/or other materials provided
15 * with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
20 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
21 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
1#include <sys/epoll.h> 30#include <sys/epoll.h>
2 31
3static int epoll_fd = -1; 32static int epoll_fd = -1;
4 33
5static void 34static void
… …
11 ev.data.fd = fd; 40 ev.data.fd = fd;
12 ev.events = 41 ev.events =
13 (nev & EV_READ ? EPOLLIN : 0) 42 (nev & EV_READ ? EPOLLIN : 0)
14 | (nev & EV_WRITE ? EPOLLOUT : 0); 43 | (nev & EV_WRITE ? EPOLLOUT : 0);
15 44
16 fprintf (stderr, "reify %d,%d,%d m%d (r=%d)\n", fd, oev, nev, mode,//D
17 epoll_ctl (epoll_fd, mode, fd, &ev) 45 epoll_ctl (epoll_fd, mode, fd, &ev);
18 );//D
19} 46}
20 47
48static void
21void epoll_postfork_child (void) 49epoll_postfork_child (void)
22{ 50{
23 int fd; 51 int fd;
24 52
25 epoll_fd = epoll_create (256); 53 epoll_fd = epoll_create (256);
54 fcntl (epoll_fd, F_SETFD, FD_CLOEXEC);
26 55
27 /* re-register interest in fds */ 56 /* re-register interest in fds */
28 for (fd = 0; fd < anfdmax; ++fd) 57 for (fd = 0; fd < anfdmax; ++fd)
29 if (anfds [fd].wev) 58 if (anfds [fd].events)//D
30 epoll_modify (fd, EV_NONE, anfds [fd].wev); 59 epoll_modify (fd, EV_NONE, anfds [fd].events);
31} 60}
32 61
33static struct epoll_event *events; 62static struct epoll_event *events;
34static int eventmax; 63static int eventmax;
35 64
65static void
36static void epoll_poll (ev_tstamp timeout) 66epoll_poll (ev_tstamp timeout)
37{ 67{
38 int eventcnt = epoll_wait (epoll_fd, events, eventmax, ceil (timeout * 1000.)); 68 int eventcnt = epoll_wait (epoll_fd, events, eventmax, ceil (timeout * 1000.));
39 int i; 69 int i;
40 70
41 if (eventcnt < 0) 71 if (eventcnt < 0)
… …
55 eventmax += eventmax >> 1; 85 eventmax += eventmax >> 1;
56 events = malloc (sizeof (struct epoll_event) * eventmax); 86 events = malloc (sizeof (struct epoll_event) * eventmax);
57 } 87 }
58} 88}
59 89
90static void
60int epoll_init (int flags) 91epoll_init (int flags)
61{ 92{
62 epoll_fd = epoll_create (256); 93 epoll_fd = epoll_create (256);
63 94
64 if (epoll_fd < 0) 95 if (epoll_fd < 0)
65 return 0; 96 return;
66 97
98 fcntl (epoll_fd, F_SETFD, FD_CLOEXEC);
99
67 ev_method = EVMETHOD_EPOLL; 100 ev_method = EVMETHOD_EPOLL;
68 method_fudge = 1e-3; /* needed to compensate for epoll returning early */ 101 method_fudge = 1e-3; /* needed to compensate for epoll returning early */
69 method_modify = epoll_modify; 102 method_modify = epoll_modify;
70 method_poll = epoll_poll; 103 method_poll = epoll_poll;
71 104
72 eventmax = 64; /* intiial number of events receivable per poll */ 105 eventmax = 64; /* intiial number of events receivable per poll */
73 events = malloc (sizeof (struct epoll_event) * eventmax); 106 events = malloc (sizeof (struct epoll_event) * eventmax);
107}
74 108
75 return 1;
76}

Diff Legend

– Removed lines
+ Added lines
< Changed lines
> Changed lines