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Comparing libev/ev_epoll.c (file contents):
Revision 1.1 by root, Tue Oct 30 20:59:31 2007 UTC vs.
Revision 1.4 by root, Wed Oct 31 11:56:34 2007 UTC

1#include <sys/epoll.h> 1#include <sys/epoll.h>
2 2
3static int epoll_fd = -1; 3static int epoll_fd = -1;
4 4
5static void 5static void
6epoll_reify_fd (int fd) 6epoll_modify (int fd, int oev, int nev)
7{ 7{
8 ANFD *anfd = anfds + fd; 8 int mode = nev ? oev ? EPOLL_CTL_MOD : EPOLL_CTL_ADD : EPOLL_CTL_DEL;
9 struct ev_io *w;
10 9
11 int wev = 0; 10 struct epoll_event ev;
11 ev.data.fd = fd;
12 ev.events =
13 (nev & EV_READ ? EPOLLIN : 0)
14 | (nev & EV_WRITE ? EPOLLOUT : 0);
12 15
13 for (w = anfd->head; w; w = w->next)
14 wev |= w->events;
15
16 if (anfd->wev != wev)
17 {
18 int mode = wev ? anfd->wev ? EPOLL_CTL_MOD : EPOLL_CTL_ADD : EPOLL_CTL_DEL;
19 struct epoll_event ev;
20 ev.events = wev;
21 ev.data.fd = fd;
22 fprintf (stderr, "reify %d,%d,%d m%d (r=%d)\n", fd, anfd->wev, wev, mode,//D
23 epoll_ctl (epoll_fd, mode, fd, &ev) 16 epoll_ctl (epoll_fd, mode, fd, &ev);
24 );//D
25 anfd->wev = wev;
26 }
27} 17}
28 18
29void epoll_postfork_child (void) 19void epoll_postfork_child (void)
30{ 20{
31 int i; 21 int fd;
32 22
33 epoll_fd = epoll_create (256); 23 epoll_fd = epoll_create (256);
24 fcntl (epoll_fd, F_SETFD, FD_CLOEXEC);
34 25
26 /* re-register interest in fds */
35 for (i = 0; i < anfdmax; ++i) 27 for (fd = 0; fd < anfdmax; ++fd)
36 epoll_reify_fd (i); 28 if (anfds [fd].wev)
37} 29 epoll_modify (fd, EV_NONE, anfds [fd].wev);
38
39static void epoll_reify (void)
40{
41 int i;
42 for (i = 0; i < fdchangecnt; ++i)
43 epoll_reify_fd (fdchanges [i]);
44} 30}
45 31
46static struct epoll_event *events; 32static struct epoll_event *events;
47static int eventmax; 33static int eventmax;
48 34
… …
55 return; 41 return;
56 42
57 for (i = 0; i < eventcnt; ++i) 43 for (i = 0; i < eventcnt; ++i)
58 fd_event ( 44 fd_event (
59 events [i].data.fd, 45 events [i].data.fd,
60 (events [i].events & (EPOLLOUT | EPOLLERR | EPOLLHUP | EPOLLPRI) ? EV_WRITE : 0) 46 (events [i].events & (EPOLLOUT | EPOLLERR | EPOLLHUP) ? EV_WRITE : 0)
61 | (events [i].events & (EPOLLIN | EPOLLERR | EPOLLHUP) ? EV_READ : 0) 47 | (events [i].events & (EPOLLIN | EPOLLERR | EPOLLHUP) ? EV_READ : 0)
62 ); 48 );
63 49
64 /* if the receive array was full, increase its size */ 50 /* if the receive array was full, increase its size */
65 if (eventcnt == eventmax) 51 if (eventcnt == eventmax)
66 { 52 {
… …
68 eventmax += eventmax >> 1; 54 eventmax += eventmax >> 1;
69 events = malloc (sizeof (struct epoll_event) * eventmax); 55 events = malloc (sizeof (struct epoll_event) * eventmax);
70 } 56 }
71} 57}
72 58
73int epoll_init (int flags) 59void epoll_init (int flags)
74{ 60{
75 epoll_fd = epoll_create (256); 61 epoll_fd = epoll_create (256);
76 62
77 if (epoll_fd < 0) 63 if (epoll_fd < 0)
78 return 0; 64 return;
79 65
66 fcntl (epoll_fd, F_SETFD, FD_CLOEXEC);
67
80 ev_method = EVMETHOD_EPOLL; 68 ev_method = EVMETHOD_EPOLL;
81 method_fudge = 1e-3; /* needed to compensate fro epoll returning early */ 69 method_fudge = 1e-3; /* needed to compensate for epoll returning early */
82 method_reify = epoll_reify; 70 method_modify = epoll_modify;
83 method_poll = epoll_poll; 71 method_poll = epoll_poll;
84 72
85 eventmax = 64; /* intiial number of events receivable per poll */ 73 eventmax = 64; /* intiial number of events receivable per poll */
86 events = malloc (sizeof (struct epoll_event) * eventmax); 74 events = malloc (sizeof (struct epoll_event) * eventmax);
87
88 return 1;
89} 75}

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