1 |
root |
1.1 |
/* |
2 |
|
|
* libevent compatibility layer |
3 |
|
|
* |
4 |
|
|
* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> |
5 |
|
|
* All rights reserved. |
6 |
|
|
* |
7 |
|
|
* Redistribution and use in source and binary forms, with or without |
8 |
|
|
* modification, are permitted provided that the following conditions are |
9 |
|
|
* met: |
10 |
|
|
* |
11 |
|
|
* * Redistributions of source code must retain the above copyright |
12 |
|
|
* notice, this list of conditions and the following disclaimer. |
13 |
|
|
* |
14 |
|
|
* * Redistributions in binary form must reproduce the above |
15 |
|
|
* copyright notice, this list of conditions and the following |
16 |
|
|
* disclaimer in the documentation and/or other materials provided |
17 |
|
|
* with the distribution. |
18 |
|
|
* |
19 |
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
20 |
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
21 |
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
22 |
|
|
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
23 |
|
|
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
24 |
|
|
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
25 |
|
|
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
26 |
|
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
27 |
|
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
28 |
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
29 |
|
|
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
30 |
|
|
*/ |
31 |
|
|
|
32 |
|
|
#include <stddef.h> |
33 |
|
|
#include <stdlib.h> |
34 |
|
|
#include <sys/time.h> |
35 |
|
|
|
36 |
|
|
#include "event.h" |
37 |
|
|
|
38 |
root |
1.7 |
#define dLOOPev |
39 |
|
|
#define dLOOPbase |
40 |
|
|
|
41 |
root |
1.1 |
struct event_base |
42 |
|
|
{ |
43 |
|
|
int dummy; |
44 |
|
|
}; |
45 |
|
|
|
46 |
|
|
static struct event_base x_base, *x_cur; |
47 |
|
|
|
48 |
|
|
static void |
49 |
|
|
tv_set (struct timeval *tv, ev_tstamp at) |
50 |
|
|
{ |
51 |
|
|
tv->tv_sec = (long)at; |
52 |
|
|
tv->tv_usec = (long)((at - (ev_tstamp)tv->tv_sec) * 1e6); |
53 |
|
|
} |
54 |
|
|
|
55 |
|
|
static ev_tstamp |
56 |
|
|
tv_get (struct timeval *tv) |
57 |
|
|
{ |
58 |
|
|
if (tv) |
59 |
|
|
return tv->tv_sec + tv->tv_usec * 1e-6; |
60 |
|
|
else |
61 |
|
|
return -1.; |
62 |
|
|
} |
63 |
|
|
|
64 |
|
|
#define EVENT_VERSION(a,b) # a "." # b |
65 |
|
|
|
66 |
|
|
const char *event_get_version (void) |
67 |
|
|
{ |
68 |
|
|
return EVENT_VERSION (EV_VERSION_MAJOR, EV_VERSION_MINOR); |
69 |
|
|
} |
70 |
|
|
|
71 |
|
|
const char *event_get_method (void) |
72 |
|
|
{ |
73 |
|
|
return "libev"; |
74 |
|
|
} |
75 |
|
|
|
76 |
|
|
void *event_init (void) |
77 |
|
|
{ |
78 |
root |
1.6 |
if (!x_cur && ev_init (0)) |
79 |
root |
1.1 |
return x_cur = &x_base; |
80 |
|
|
|
81 |
|
|
return 0; |
82 |
|
|
} |
83 |
|
|
|
84 |
|
|
void event_base_free (struct event_base *base) |
85 |
|
|
{ |
86 |
|
|
/* nop */ |
87 |
|
|
} |
88 |
|
|
|
89 |
|
|
int event_dispatch (void) |
90 |
|
|
{ |
91 |
|
|
return event_base_dispatch (x_cur); |
92 |
|
|
} |
93 |
|
|
|
94 |
root |
1.5 |
#ifdef EV_STANDALONE |
95 |
root |
1.1 |
void event_set_log_callback (event_log_cb cb) |
96 |
|
|
{ |
97 |
|
|
/* nop */ |
98 |
|
|
} |
99 |
root |
1.5 |
#endif |
100 |
root |
1.1 |
|
101 |
|
|
int event_loop (int flags) |
102 |
|
|
{ |
103 |
|
|
return event_base_loop (x_cur, flags); |
104 |
|
|
} |
105 |
|
|
|
106 |
|
|
int event_loopexit (struct timeval *tv) |
107 |
|
|
{ |
108 |
root |
1.5 |
return event_base_loopexit (x_cur, tv); |
109 |
root |
1.1 |
} |
110 |
|
|
|
111 |
|
|
static void |
112 |
|
|
x_cb (struct event *ev, int revents) |
113 |
|
|
{ |
114 |
|
|
revents &= EV_READ | EV_WRITE | EV_TIMEOUT | EV_SIGNAL; |
115 |
|
|
|
116 |
|
|
ev->ev_res = revents; |
117 |
|
|
ev->ev_callback (ev->ev_fd, revents, ev->ev_arg); |
118 |
|
|
} |
119 |
|
|
|
120 |
|
|
static void |
121 |
root |
1.7 |
x_cb_sig (EV_P_ struct ev_signal *w, int revents) |
122 |
root |
1.1 |
{ |
123 |
root |
1.7 |
x_cb ((struct event *)(((char *)w) - offsetof (struct event, iosig.sig)), revents); |
124 |
root |
1.1 |
} |
125 |
|
|
|
126 |
|
|
static void |
127 |
root |
1.7 |
x_cb_io (EV_P_ struct ev_io *w, int revents) |
128 |
root |
1.1 |
{ |
129 |
root |
1.7 |
struct event *ev = (struct event *)(((char *)w) - offsetof (struct event, iosig.io)); |
130 |
|
|
|
131 |
|
|
if (!(ev->ev_events & EV_PERSIST) && ev_is_active (w)) |
132 |
|
|
ev_io_stop (w); |
133 |
|
|
|
134 |
|
|
x_cb (ev, revents); |
135 |
root |
1.1 |
} |
136 |
|
|
|
137 |
|
|
static void |
138 |
root |
1.7 |
x_cb_to (EV_P_ struct ev_timer *w, int revents) |
139 |
root |
1.1 |
{ |
140 |
root |
1.7 |
x_cb ((struct event *)(((char *)w) - offsetof (struct event, to)), revents); |
141 |
root |
1.1 |
} |
142 |
|
|
|
143 |
|
|
void event_set (struct event *ev, int fd, short events, void (*cb)(int, short, void *), void *arg) |
144 |
|
|
{ |
145 |
root |
1.4 |
if (events & EV_SIGNAL) |
146 |
|
|
ev_watcher_init (&ev->iosig.sig, x_cb_sig); |
147 |
|
|
else |
148 |
|
|
ev_watcher_init (&ev->iosig.io, x_cb_io); |
149 |
|
|
|
150 |
root |
1.1 |
ev_watcher_init (&ev->to, x_cb_to); |
151 |
|
|
|
152 |
|
|
ev->ev_base = x_cur; |
153 |
|
|
ev->ev_fd = fd; |
154 |
|
|
ev->ev_events = events; |
155 |
|
|
ev->ev_pri = 0; |
156 |
|
|
ev->ev_callback = cb; |
157 |
|
|
ev->ev_arg = arg; |
158 |
|
|
ev->ev_res = 0; |
159 |
|
|
} |
160 |
|
|
|
161 |
|
|
int event_once (int fd, short events, void (*cb)(int, short, void *), void *arg, struct timeval *tv) |
162 |
|
|
{ |
163 |
root |
1.5 |
return event_base_once (x_cur, fd, events, cb, arg, tv); |
164 |
root |
1.1 |
} |
165 |
|
|
|
166 |
|
|
int event_add (struct event *ev, struct timeval *tv) |
167 |
|
|
{ |
168 |
root |
1.7 |
dLOOPev; |
169 |
|
|
|
170 |
root |
1.4 |
/* disable all watchers */ |
171 |
|
|
event_del (ev); |
172 |
|
|
|
173 |
|
|
if (ev->ev_events & EV_SIGNAL) |
174 |
root |
1.1 |
{ |
175 |
root |
1.4 |
ev_signal_set (&ev->iosig.sig, ev->ev_fd); |
176 |
root |
1.7 |
ev_signal_start (EV_A_ &ev->iosig.sig); |
177 |
root |
1.1 |
} |
178 |
root |
1.4 |
else if (ev->ev_events & (EV_READ | EV_WRITE)) |
179 |
root |
1.1 |
{ |
180 |
root |
1.4 |
ev_io_set (&ev->iosig.io, ev->ev_fd, ev->ev_events & (EV_READ | EV_WRITE)); |
181 |
root |
1.7 |
ev_io_start (EV_A_ &ev->iosig.io); |
182 |
root |
1.1 |
} |
183 |
|
|
|
184 |
root |
1.4 |
if (tv) |
185 |
root |
1.1 |
{ |
186 |
root |
1.4 |
ev_timer_set (&ev->to, tv_get (tv), 0.); |
187 |
root |
1.7 |
ev_timer_start (EV_A_ &ev->to); |
188 |
root |
1.1 |
} |
189 |
|
|
|
190 |
|
|
return 0; |
191 |
|
|
} |
192 |
|
|
|
193 |
|
|
int event_del (struct event *ev) |
194 |
|
|
{ |
195 |
root |
1.7 |
dLOOPev; |
196 |
|
|
|
197 |
root |
1.4 |
if (ev->ev_events & EV_SIGNAL) |
198 |
|
|
{ |
199 |
|
|
/* sig */ |
200 |
|
|
if (ev_is_active (&ev->iosig.sig)) |
201 |
root |
1.7 |
ev_signal_stop (EV_A_ &ev->iosig.sig); |
202 |
root |
1.4 |
} |
203 |
|
|
else |
204 |
root |
1.1 |
{ |
205 |
root |
1.4 |
/* io */ |
206 |
|
|
if (ev_is_active (&ev->iosig.io)) |
207 |
root |
1.7 |
ev_io_stop (EV_A_ &ev->iosig.io); |
208 |
root |
1.1 |
} |
209 |
|
|
|
210 |
|
|
if (ev_is_active (&ev->to)) |
211 |
root |
1.7 |
ev_timer_stop (EV_A_ &ev->to); |
212 |
root |
1.1 |
|
213 |
|
|
return 0; |
214 |
|
|
} |
215 |
|
|
|
216 |
|
|
int event_pending (struct event *ev, short events, struct timeval *tv) |
217 |
|
|
{ |
218 |
root |
1.7 |
dLOOPev; |
219 |
|
|
|
220 |
root |
1.5 |
short revents = 0; |
221 |
root |
1.1 |
|
222 |
root |
1.4 |
if (ev->ev_events & EV_SIGNAL) |
223 |
|
|
{ |
224 |
|
|
/* sig */ |
225 |
|
|
if (ev->iosig.sig.pending) |
226 |
|
|
revents |= EV_SIGNAL; |
227 |
|
|
} |
228 |
|
|
else |
229 |
|
|
{ |
230 |
|
|
/* io */ |
231 |
|
|
if (ev->iosig.io.pending) |
232 |
|
|
revents |= ev->ev_events & (EV_READ | EV_WRITE); |
233 |
|
|
} |
234 |
root |
1.1 |
|
235 |
|
|
if (ev->to.pending) |
236 |
|
|
{ |
237 |
|
|
revents |= EV_TIMEOUT; |
238 |
|
|
|
239 |
|
|
if (tv) |
240 |
root |
1.7 |
tv_set (tv, ev_now (EV_A)); /* not sure if this is right :) */ |
241 |
root |
1.1 |
} |
242 |
|
|
|
243 |
|
|
return events & revents; |
244 |
|
|
} |
245 |
|
|
|
246 |
|
|
int event_priority_init (int npri) |
247 |
|
|
{ |
248 |
|
|
return event_base_priority_init (x_cur, npri); |
249 |
|
|
} |
250 |
|
|
|
251 |
|
|
int event_priority_set (struct event *ev, int pri) |
252 |
|
|
{ |
253 |
|
|
ev->ev_pri = pri; |
254 |
|
|
|
255 |
|
|
return 0; |
256 |
|
|
} |
257 |
|
|
|
258 |
|
|
int event_base_set (struct event_base *base, struct event *ev) |
259 |
|
|
{ |
260 |
|
|
ev->ev_base = base; |
261 |
|
|
|
262 |
|
|
return 0; |
263 |
|
|
} |
264 |
|
|
|
265 |
|
|
int event_base_loop (struct event_base *base, int flags) |
266 |
|
|
{ |
267 |
root |
1.7 |
dLOOPbase; |
268 |
|
|
ev_loop (EV_A_ flags | EVLOOP_ONESHOT); |
269 |
root |
1.1 |
|
270 |
|
|
return 0; |
271 |
|
|
} |
272 |
|
|
|
273 |
|
|
int event_base_dispatch (struct event_base *base) |
274 |
|
|
{ |
275 |
|
|
return event_base_loop (base, 0); |
276 |
|
|
} |
277 |
|
|
|
278 |
|
|
static void |
279 |
root |
1.7 |
x_loopexit_cb (EV_P_ int revents, void *arg) |
280 |
root |
1.1 |
{ |
281 |
root |
1.7 |
ev_unloop (EV_A_ 2); |
282 |
root |
1.1 |
} |
283 |
|
|
|
284 |
|
|
int event_base_loopexit (struct event_base *base, struct timeval *tv) |
285 |
|
|
{ |
286 |
root |
1.7 |
dLOOPbase; |
287 |
root |
1.1 |
ev_tstamp after = tv_get (tv); |
288 |
|
|
|
289 |
root |
1.7 |
ev_once (EV_A_ -1, 0, after >= 0. ? after : 0., x_loopexit_cb, (void *)base); |
290 |
root |
1.5 |
|
291 |
|
|
return -1; |
292 |
root |
1.1 |
} |
293 |
|
|
|
294 |
|
|
struct x_once |
295 |
|
|
{ |
296 |
|
|
int fd; |
297 |
|
|
void (*cb)(int, short, void *); |
298 |
|
|
void *arg; |
299 |
|
|
}; |
300 |
|
|
|
301 |
|
|
static void |
302 |
|
|
x_once_cb (int revents, void *arg) |
303 |
|
|
{ |
304 |
|
|
struct x_once *once = arg; |
305 |
|
|
|
306 |
|
|
once->cb (once->fd, revents, once->arg); |
307 |
|
|
free (once); |
308 |
|
|
} |
309 |
|
|
|
310 |
|
|
int event_base_once (struct event_base *base, int fd, short events, void (*cb)(int, short, void *), void *arg, struct timeval *tv) |
311 |
|
|
{ |
312 |
root |
1.7 |
dLOOPbase; |
313 |
root |
1.1 |
struct x_once *once = malloc (sizeof (struct x_once)); |
314 |
|
|
|
315 |
|
|
if (!once) |
316 |
|
|
return -1; |
317 |
|
|
|
318 |
|
|
once->fd = fd; |
319 |
|
|
once->cb = cb; |
320 |
|
|
once->arg = arg; |
321 |
|
|
|
322 |
root |
1.7 |
ev_once (EV_A_ fd, events & (EV_READ | EV_WRITE), tv_get (tv), x_once_cb, (void *)once); |
323 |
root |
1.1 |
|
324 |
|
|
return 0; |
325 |
|
|
} |
326 |
|
|
|
327 |
|
|
int event_base_priority_init (struct event_base *base, int npri) |
328 |
|
|
{ |
329 |
root |
1.7 |
dLOOPbase; |
330 |
|
|
|
331 |
root |
1.1 |
return 0; |
332 |
|
|
} |
333 |
|
|
|