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