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Comparing libev/ev_kqueue.c (file contents):
Revision 1.6 by root, Sat Nov 3 21:58:51 2007 UTC vs.
Revision 1.18 by root, Thu Nov 22 15:40:56 2007 UTC

… …
37static void 37static void
38kqueue_change (EV_P_ int fd, int filter, int flags, int fflags) 38kqueue_change (EV_P_ int fd, int filter, int flags, int fflags)
39{ 39{
40 struct kevent *ke; 40 struct kevent *ke;
41 41
42 ++kqueue_changecnt;
42 array_needsize (kqueue_changes, kqueue_changemax, ++kqueue_changecnt, ); 43 array_needsize (struct kevent, kqueue_changes, kqueue_changemax, kqueue_changecnt, EMPTY2);
43 44
44 ke = &kqueue_changes [kqueue_changecnt - 1]; 45 ke = &kqueue_changes [kqueue_changecnt - 1];
45 memset (ke, 0, sizeof (struct kevent)); 46 memset (ke, 0, sizeof (struct kevent));
46 ke->ident = fd; 47 ke->ident = fd;
47 ke->filter = filter; 48 ke->filter = filter;
… …
54#endif 55#endif
55 56
56static void 57static void
57kqueue_modify (EV_P_ int fd, int oev, int nev) 58kqueue_modify (EV_P_ int fd, int oev, int nev)
58{ 59{
60 /* to detect close/reopen reliably, we have to remove and re-add */
61 /* event requests even when oev == nev */
62
59 if ((oev ^ nev) & EV_READ) 63 if (oev & EV_READ)
60 { 64 kqueue_change (EV_A_ fd, EVFILT_READ, EV_DELETE, 0);
65
66 if (oev & EV_WRITE)
67 kqueue_change (EV_A_ fd, EVFILT_WRITE, EV_DELETE, 0);
68
61 if (nev & EV_READ) 69 if (nev & EV_READ)
62 kqueue_change (fd, EVFILT_READ, EV_ADD, NOTE_EOF); 70 kqueue_change (EV_A_ fd, EVFILT_READ, EV_ADD, NOTE_EOF);
63 else
64 kqueue_change (fd, EVFILT_READ, EV_DELETE, 0);
65 }
66 71
67 if ((oev ^ nev) & EV_WRITE)
68 {
69 if (nev & EV_WRITE) 72 if (nev & EV_WRITE)
70 kqueue_change (fd, EVFILT_WRITE, EV_ADD, NOTE_EOF); 73 kqueue_change (EV_A_ fd, EVFILT_WRITE, EV_ADD, NOTE_EOF);
71 else
72 kqueue_change (fd, EVFILT_WRITE, EV_DELETE, 0);
73 }
74} 74}
75 75
76static void 76static void
77kqueue_poll (EV_P_ ev_tstamp timeout) 77kqueue_poll (EV_P_ ev_tstamp timeout)
78{ 78{
79 int res, i; 79 int res, i;
80 struct timespec ts; 80 struct timespec ts;
81 81
82 /* need to resize so there is enough space for errors */
83 if (kqueue_changecnt > kqueue_eventmax)
84 {
85 ev_free (kqueue_events);
86 kqueue_eventmax = array_roundsize (struct kevent, kqueue_changecnt);
87 kqueue_events = (struct kevent *)ev_malloc (sizeof (struct kevent) * kqueue_eventmax);
88 }
89
82 ts.tv_sec = (time_t)timeout; 90 ts.tv_sec = (time_t)timeout;
83 ts.tv_nsec = (long)(timeout - (ev_tstamp)ts.tv_sec) * 1e9; 91 ts.tv_nsec = (long)((timeout - (ev_tstamp)ts.tv_sec) * 1e9);
92 fprintf (stderr, "to %ld:%09ld %f\n", ts.tv_sec, ts.tv_nsec, res);//D
84 res = kevent (kqueue_fd, kqueue_changes, kqueue_changecnt, kqueue_events, kqueue_eventmax, &ts); 93 res = kevent (kqueue_fd, kqueue_changes, kqueue_changecnt, kqueue_events, kqueue_eventmax, &ts);
85 kqueue_changecnt = 0; 94 kqueue_changecnt = 0;
86 95
87 if (res < 0) 96 if (res < 0)
97 {
98 if (errno != EINTR)
99 syserr ("(libev) kevent");
100
88 return; 101 return;
102 }
89 103
90 for (i = 0; i < res; ++i) 104 for (i = 0; i < res; ++i)
91 { 105 {
106 int fd = kqueue_events [i].ident;
107
92 if (kqueue_events [i].flags & EV_ERROR) 108 if (kqueue_events [i].flags & EV_ERROR)
93 { 109 {
110 int err = kqueue_events [i].data;
111
94 /* 112 /*
95 * Error messages that can happen, when a delete fails. 113 * errors that may happen
96 * EBADF happens when the file discriptor has been 114 * EBADF happens when the file discriptor has been
97 * closed, 115 * closed,
98 * ENOENT when the file discriptor was closed and 116 * ENOENT when the file descriptor was closed and
99 * then reopened. 117 * then reopened.
100 * EINVAL for some reasons not understood; EINVAL 118 * EINVAL for some reasons not understood; EINVAL
101 * should not be returned ever; but FreeBSD does :-\ 119 * should not be returned ever; but FreeBSD does :-\
102 * An error is also indicated when a callback deletes
103 * an event we are still processing. In that case
104 * the data field is set to ENOENT.
105 */ 120 */
106 if (kqueue_events [i].data == EBADF) 121
107 fd_kill (EV_A_ kqueue_events [i].ident); 122 /* we are only interested in errors for fds that we are interested in :) */
123 if (anfds [fd].events)
124 {
125 if (err == ENOENT) /* resubmit changes on ENOENT */
126 kqueue_modify (EV_A_ fd, 0, anfds [fd].events);
127 else if (err == EBADF) /* on EBADF, we re-check the fd */
128 {
129 if (fd_valid (fd))
130 kqueue_modify (EV_A_ fd, 0, anfds [fd].events);
131 else
132 fd_kill (EV_A_ fd);
133 }
134 else /* on all other errors, we error out on the fd */
135 fd_kill (EV_A_ fd);
136 }
108 } 137 }
109 else 138 else
110 fd_event ( 139 fd_event (
111 EV_A_ 140 EV_A_
112 kqueue_events [i].ident, 141 fd,
113 kqueue_events [i].filter == EVFILT_READ ? EV_READ 142 kqueue_events [i].filter == EVFILT_READ ? EV_READ
114 : kqueue_events [i].filter == EVFILT_WRITE ? EV_WRITE 143 : kqueue_events [i].filter == EVFILT_WRITE ? EV_WRITE
115 : 0 144 : 0
116 ); 145 );
117 } 146 }
118 147
119 if (expect_false (res == kqueue_eventmax)) 148 if (expect_false (res == kqueue_eventmax))
120 { 149 {
121 free (kqueue_events); 150 ev_free (kqueue_events);
122 kqueue_eventmax = array_roundsize (kqueue_events, kqueue_eventmax << 1); 151 kqueue_eventmax = array_roundsize (struct kevent, kqueue_eventmax << 1);
123 kqueue_events = malloc (sizeof (struct kevent) * kqueue_eventmax); 152 kqueue_events = (struct kevent *)ev_malloc (sizeof (struct kevent) * kqueue_eventmax);
124 } 153 }
125} 154}
126 155
127static int 156static int
128kqueue_init (EV_P_ int flags) 157kqueue_init (EV_P_ int flags)
… …
130 struct kevent ch, ev; 159 struct kevent ch, ev;
131 160
132 /* Initalize the kernel queue */ 161 /* Initalize the kernel queue */
133 if ((kqueue_fd = kqueue ()) < 0) 162 if ((kqueue_fd = kqueue ()) < 0)
134 return 0; 163 return 0;
164
165 fcntl (kqueue_fd, F_SETFD, FD_CLOEXEC); /* not sure if necessary, hopefully doesn't hurt */
135 166
136 /* Check for Mac OS X kqueue bug. */ 167 /* Check for Mac OS X kqueue bug. */
137 ch.ident = -1; 168 ch.ident = -1;
138 ch.filter = EVFILT_READ; 169 ch.filter = EVFILT_READ;
139 ch.flags = EV_ADD; 170 ch.flags = EV_ADD;
… …
155 method_fudge = 1e-3; /* needed to compensate for kevent returning early */ 186 method_fudge = 1e-3; /* needed to compensate for kevent returning early */
156 method_modify = kqueue_modify; 187 method_modify = kqueue_modify;
157 method_poll = kqueue_poll; 188 method_poll = kqueue_poll;
158 189
159 kqueue_eventmax = 64; /* intiial number of events receivable per poll */ 190 kqueue_eventmax = 64; /* intiial number of events receivable per poll */
160 kqueue_events = malloc (sizeof (struct kevent) * kqueue_eventmax); 191 kqueue_events = (struct kevent *)ev_malloc (sizeof (struct kevent) * kqueue_eventmax);
192
193 kqueue_changes = 0;
194 kqueue_changemax = 0;
195 kqueue_changecnt = 0;
161 196
162 return EVMETHOD_KQUEUE; 197 return EVMETHOD_KQUEUE;
163} 198}
164 199
200static void
201kqueue_destroy (EV_P)
202{
203 close (kqueue_fd);
204
205 ev_free (kqueue_events);
206 ev_free (kqueue_changes);
207}
208
209static void
210kqueue_fork (EV_P)
211{
212 close (kqueue_fd);
213
214 while ((kqueue_fd = kqueue ()) < 0)
215 syserr ("(libev) kqueue");
216
217 fcntl (kqueue_fd, F_SETFD, FD_CLOEXEC);
218
219 /* re-register interest in fds */
220 fd_rearm_all (EV_A);
221}
222

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