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37 | static void |
37 | static void |
38 | kqueue_change (EV_P_ int fd, int filter, int flags, int fflags) |
38 | kqueue_change (EV_P_ int fd, int filter, int flags, int fflags) |
39 | { |
39 | { |
40 | struct kevent *ke; |
40 | struct kevent *ke; |
41 | |
41 | |
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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 | EV_SET (&kqueue_changes [kqueue_changecnt - 1], fd, filter, flags, fflags, 0, 0); |
45 | memset (ke, 0, sizeof (struct kevent)); |
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46 | ke->ident = fd; |
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47 | ke->filter = filter; |
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48 | ke->flags = flags; |
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49 | ke->fflags = fflags; |
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50 | } |
46 | } |
51 | |
47 | |
52 | #ifndef NOTE_EOF |
48 | #ifndef NOTE_EOF |
53 | # define NOTE_EOF 0 |
49 | # define NOTE_EOF 0 |
54 | #endif |
50 | #endif |
55 | |
51 | |
56 | static void |
52 | static void |
57 | kqueue_modify (EV_P_ int fd, int oev, int nev) |
53 | kqueue_modify (EV_P_ int fd, int oev, int nev) |
58 | { |
54 | { |
59 | if ((oev ^ nev) & EV_READ) |
55 | if (oev != nev) |
60 | { |
56 | { |
61 | if (nev & EV_READ) |
57 | if (oev & EV_READ) |
62 | kqueue_change (fd, EVFILT_READ, EV_ADD, NOTE_EOF); |
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63 | else |
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64 | kqueue_change (fd, EVFILT_READ, EV_DELETE, 0); |
58 | kqueue_change (EV_A_ fd, EVFILT_READ , EV_DELETE, 0); |
65 | } |
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66 | |
59 | |
67 | if ((oev ^ nev) & EV_WRITE) |
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68 | { |
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69 | if (nev & EV_WRITE) |
60 | if (oev & EV_WRITE) |
70 | kqueue_change (fd, EVFILT_WRITE, EV_ADD, NOTE_EOF); |
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71 | else |
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72 | kqueue_change (fd, EVFILT_WRITE, EV_DELETE, 0); |
61 | kqueue_change (EV_A_ fd, EVFILT_WRITE, EV_DELETE, 0); |
73 | } |
62 | } |
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63 | |
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64 | /* to detect close/reopen reliably, we have to re-add */ |
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65 | /* event requests even when oev == nev */ |
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66 | |
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67 | if (nev & EV_READ) |
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68 | kqueue_change (EV_A_ fd, EVFILT_READ , EV_ADD, NOTE_EOF); |
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69 | |
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70 | if (nev & EV_WRITE) |
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71 | kqueue_change (EV_A_ fd, EVFILT_WRITE, EV_ADD, NOTE_EOF); |
74 | } |
72 | } |
75 | |
73 | |
76 | static void |
74 | static void |
77 | kqueue_poll (EV_P_ ev_tstamp timeout) |
75 | kqueue_poll (EV_P_ ev_tstamp timeout) |
78 | { |
76 | { |
79 | int res, i; |
77 | int res, i; |
80 | struct timespec ts; |
78 | struct timespec ts; |
81 | |
79 | |
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80 | /* need to resize so there is enough space for errors */ |
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81 | if (kqueue_changecnt > kqueue_eventmax) |
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82 | { |
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83 | ev_free (kqueue_events); |
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84 | kqueue_eventmax = array_roundsize (struct kevent, kqueue_changecnt); |
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85 | kqueue_events = (struct kevent *)ev_malloc (sizeof (struct kevent) * kqueue_eventmax); |
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86 | } |
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87 | |
82 | ts.tv_sec = (time_t)timeout; |
88 | ts.tv_sec = (time_t)timeout; |
83 | ts.tv_nsec = (long)(timeout - (ev_tstamp)ts.tv_sec) * 1e9; |
89 | ts.tv_nsec = (long)((timeout - (ev_tstamp)ts.tv_sec) * 1e9); |
84 | res = kevent (kqueue_fd, kqueue_changes, kqueue_changecnt, kqueue_events, kqueue_eventmax, &ts); |
90 | res = kevent (kqueue_fd, kqueue_changes, kqueue_changecnt, kqueue_events, kqueue_eventmax, &ts); |
85 | kqueue_changecnt = 0; |
91 | kqueue_changecnt = 0; |
86 | |
92 | |
87 | if (res < 0) |
93 | if (res < 0) |
88 | { |
94 | { |
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92 | return; |
98 | return; |
93 | } |
99 | } |
94 | |
100 | |
95 | for (i = 0; i < res; ++i) |
101 | for (i = 0; i < res; ++i) |
96 | { |
102 | { |
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103 | int fd = kqueue_events [i].ident; |
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104 | |
97 | if (kqueue_events [i].flags & EV_ERROR) |
105 | if (expect_false (kqueue_events [i].flags & EV_ERROR)) |
98 | { |
106 | { |
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107 | int err = kqueue_events [i].data; |
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108 | |
99 | /* |
109 | /* |
100 | * Error messages that can happen, when a delete fails. |
110 | * errors that may happen |
101 | * EBADF happens when the file discriptor has been |
111 | * EBADF happens when the file discriptor has been |
102 | * closed, |
112 | * closed, |
103 | * ENOENT when the file discriptor was closed and |
113 | * ENOENT when the file descriptor was closed and |
104 | * then reopened. |
114 | * then reopened. |
105 | * EINVAL for some reasons not understood; EINVAL |
115 | * EINVAL for some reasons not understood; EINVAL |
106 | * should not be returned ever; but FreeBSD does :-\ |
116 | * should not be returned ever; but FreeBSD does :-\ |
107 | * An error is also indicated when a callback deletes |
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108 | * an event we are still processing. In that case |
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109 | * the data field is set to ENOENT. |
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110 | */ |
117 | */ |
111 | if (kqueue_events [i].data == EBADF) |
118 | |
112 | fd_kill (EV_A_ kqueue_events [i].ident); |
119 | /* we are only interested in errors for fds that we are interested in :) */ |
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120 | if (anfds [fd].events) |
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121 | { |
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122 | if (err == ENOENT) /* resubmit changes on ENOENT */ |
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123 | kqueue_modify (EV_A_ fd, 0, anfds [fd].events); |
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124 | else if (err == EBADF) /* on EBADF, we re-check the fd */ |
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125 | { |
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126 | if (fd_valid (fd)) |
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127 | kqueue_modify (EV_A_ fd, 0, anfds [fd].events); |
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128 | else |
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129 | fd_kill (EV_A_ fd); |
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130 | } |
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131 | else /* on all other errors, we error out on the fd */ |
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132 | fd_kill (EV_A_ fd); |
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133 | } |
113 | } |
134 | } |
114 | else |
135 | else |
115 | fd_event ( |
136 | fd_event ( |
116 | EV_A_ |
137 | EV_A_ |
117 | kqueue_events [i].ident, |
138 | fd, |
118 | kqueue_events [i].filter == EVFILT_READ ? EV_READ |
139 | kqueue_events [i].filter == EVFILT_READ ? EV_READ |
119 | : kqueue_events [i].filter == EVFILT_WRITE ? EV_WRITE |
140 | : kqueue_events [i].filter == EVFILT_WRITE ? EV_WRITE |
120 | : 0 |
141 | : 0 |
121 | ); |
142 | ); |
122 | } |
143 | } |
123 | |
144 | |
124 | if (expect_false (res == kqueue_eventmax)) |
145 | if (expect_false (res == kqueue_eventmax)) |
125 | { |
146 | { |
126 | ev_free (kqueue_events); |
147 | ev_free (kqueue_events); |
127 | kqueue_eventmax = array_roundsize (kqueue_events, kqueue_eventmax << 1); |
148 | kqueue_eventmax = array_roundsize (struct kevent, kqueue_eventmax << 1); |
128 | kqueue_events = ev_malloc (sizeof (struct kevent) * kqueue_eventmax); |
149 | kqueue_events = (struct kevent *)ev_malloc (sizeof (struct kevent) * kqueue_eventmax); |
129 | } |
150 | } |
130 | } |
151 | } |
131 | |
152 | |
132 | static int |
153 | static int |
133 | kqueue_init (EV_P_ int flags) |
154 | kqueue_init (EV_P_ int flags) |
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157 | /* detected broken kqueue */ |
178 | /* detected broken kqueue */ |
158 | close (kqueue_fd); |
179 | close (kqueue_fd); |
159 | return 0; |
180 | return 0; |
160 | } |
181 | } |
161 | |
182 | |
162 | method_fudge = 1e-3; /* needed to compensate for kevent returning early */ |
183 | backend_fudge = 1e-3; /* needed to compensate for kevent returning early */ |
163 | method_modify = kqueue_modify; |
184 | backend_modify = kqueue_modify; |
164 | method_poll = kqueue_poll; |
185 | backend_poll = kqueue_poll; |
165 | |
186 | |
166 | kqueue_eventmax = 64; /* intiial number of events receivable per poll */ |
187 | kqueue_eventmax = 64; /* intiial number of events receivable per poll */ |
167 | kqueue_events = ev_malloc (sizeof (struct kevent) * kqueue_eventmax); |
188 | kqueue_events = (struct kevent *)ev_malloc (sizeof (struct kevent) * kqueue_eventmax); |
168 | |
189 | |
169 | kqueue_changes = 0; |
190 | kqueue_changes = 0; |
170 | kqueue_changemax = 0; |
191 | kqueue_changemax = 0; |
171 | kqueue_changecnt = 0; |
192 | kqueue_changecnt = 0; |
172 | |
193 | |
173 | return EVMETHOD_KQUEUE; |
194 | return EVBACKEND_KQUEUE; |
174 | } |
195 | } |
175 | |
196 | |
176 | static void |
197 | static void |
177 | kqueue_destroy (EV_P) |
198 | kqueue_destroy (EV_P) |
178 | { |
199 | { |
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183 | } |
204 | } |
184 | |
205 | |
185 | static void |
206 | static void |
186 | kqueue_fork (EV_P) |
207 | kqueue_fork (EV_P) |
187 | { |
208 | { |
188 | for (;;) |
209 | close (kqueue_fd); |
189 | { |
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190 | kqueue_fd = kqueue (); |
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191 | |
210 | |
192 | if (kqueue_fd >= 0) |
211 | while ((kqueue_fd = kqueue ()) < 0) |
193 | break; |
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194 | |
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195 | syserr ("(libev) kqueue"); |
212 | syserr ("(libev) kqueue"); |
196 | } |
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197 | |
213 | |
198 | fcntl (kqueue_fd, F_SETFD, FD_CLOEXEC); |
214 | fcntl (kqueue_fd, F_SETFD, FD_CLOEXEC); |
199 | |
215 | |
200 | /* re-register interest in fds */ |
216 | /* re-register interest in fds */ |
201 | fd_rearm_all (EV_A); |
217 | fd_rearm_all (EV_A); |