1 | #include <machine/rtems-bsd-user-space.h> |
---|
2 | |
---|
3 | /* |
---|
4 | * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC") |
---|
5 | * Copyright (c) 1995-1999 by Internet Software Consortium |
---|
6 | * |
---|
7 | * Permission to use, copy, modify, and distribute this software for any |
---|
8 | * purpose with or without fee is hereby granted, provided that the above |
---|
9 | * copyright notice and this permission notice appear in all copies. |
---|
10 | * |
---|
11 | * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES |
---|
12 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
---|
13 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR |
---|
14 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
---|
15 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
---|
16 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT |
---|
17 | * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
---|
18 | */ |
---|
19 | |
---|
20 | /* ev_timers.c - implement timers for the eventlib |
---|
21 | * vix 09sep95 [initial] |
---|
22 | */ |
---|
23 | |
---|
24 | #if !defined(LINT) && !defined(CODECENTER) |
---|
25 | static const char rcsid[] = "$Id: ev_timers.c,v 1.6 2005/04/27 04:56:36 sra Exp $"; |
---|
26 | #endif |
---|
27 | #include <sys/cdefs.h> |
---|
28 | __FBSDID("$FreeBSD$"); |
---|
29 | |
---|
30 | /* Import. */ |
---|
31 | |
---|
32 | #include "port_before.h" |
---|
33 | #ifndef _LIBC |
---|
34 | #include "fd_setsize.h" |
---|
35 | #endif |
---|
36 | |
---|
37 | #include <errno.h> |
---|
38 | |
---|
39 | #ifndef _LIBC |
---|
40 | #include <isc/assertions.h> |
---|
41 | #endif |
---|
42 | #include <isc/eventlib.h> |
---|
43 | #include "eventlib_p.h" |
---|
44 | |
---|
45 | #include "port_after.h" |
---|
46 | |
---|
47 | /* Constants. */ |
---|
48 | |
---|
49 | #define MILLION 1000000 |
---|
50 | #define BILLION 1000000000 |
---|
51 | |
---|
52 | /* Forward. */ |
---|
53 | |
---|
54 | #ifdef _LIBC |
---|
55 | static int __evOptMonoTime; |
---|
56 | #else |
---|
57 | static int due_sooner(void *, void *); |
---|
58 | static void set_index(void *, int); |
---|
59 | static void free_timer(void *, void *); |
---|
60 | static void print_timer(void *, void *); |
---|
61 | static void idle_timeout(evContext, void *, struct timespec, struct timespec); |
---|
62 | |
---|
63 | /* Private type. */ |
---|
64 | |
---|
65 | typedef struct { |
---|
66 | evTimerFunc func; |
---|
67 | void * uap; |
---|
68 | struct timespec lastTouched; |
---|
69 | struct timespec max_idle; |
---|
70 | evTimer * timer; |
---|
71 | } idle_timer; |
---|
72 | #endif |
---|
73 | |
---|
74 | /* Public. */ |
---|
75 | |
---|
76 | struct timespec |
---|
77 | evConsTime(time_t sec, long nsec) { |
---|
78 | struct timespec x; |
---|
79 | |
---|
80 | x.tv_sec = sec; |
---|
81 | x.tv_nsec = nsec; |
---|
82 | return (x); |
---|
83 | } |
---|
84 | |
---|
85 | struct timespec |
---|
86 | evAddTime(struct timespec addend1, struct timespec addend2) { |
---|
87 | struct timespec x; |
---|
88 | |
---|
89 | x.tv_sec = addend1.tv_sec + addend2.tv_sec; |
---|
90 | x.tv_nsec = addend1.tv_nsec + addend2.tv_nsec; |
---|
91 | if (x.tv_nsec >= BILLION) { |
---|
92 | x.tv_sec++; |
---|
93 | x.tv_nsec -= BILLION; |
---|
94 | } |
---|
95 | return (x); |
---|
96 | } |
---|
97 | |
---|
98 | struct timespec |
---|
99 | evSubTime(struct timespec minuend, struct timespec subtrahend) { |
---|
100 | struct timespec x; |
---|
101 | |
---|
102 | x.tv_sec = minuend.tv_sec - subtrahend.tv_sec; |
---|
103 | if (minuend.tv_nsec >= subtrahend.tv_nsec) |
---|
104 | x.tv_nsec = minuend.tv_nsec - subtrahend.tv_nsec; |
---|
105 | else { |
---|
106 | x.tv_nsec = BILLION - subtrahend.tv_nsec + minuend.tv_nsec; |
---|
107 | x.tv_sec--; |
---|
108 | } |
---|
109 | return (x); |
---|
110 | } |
---|
111 | |
---|
112 | int |
---|
113 | evCmpTime(struct timespec a, struct timespec b) { |
---|
114 | long x = a.tv_sec - b.tv_sec; |
---|
115 | |
---|
116 | if (x == 0L) |
---|
117 | x = a.tv_nsec - b.tv_nsec; |
---|
118 | return (x < 0L ? (-1) : x > 0L ? (1) : (0)); |
---|
119 | } |
---|
120 | |
---|
121 | struct timespec |
---|
122 | evNowTime() { |
---|
123 | struct timeval now; |
---|
124 | #ifdef CLOCK_REALTIME |
---|
125 | struct timespec tsnow; |
---|
126 | int m = CLOCK_REALTIME; |
---|
127 | |
---|
128 | #ifdef CLOCK_MONOTONIC |
---|
129 | if (__evOptMonoTime) |
---|
130 | m = CLOCK_MONOTONIC; |
---|
131 | #endif |
---|
132 | if (clock_gettime(m, &tsnow) == 0) |
---|
133 | return (tsnow); |
---|
134 | #endif |
---|
135 | if (gettimeofday(&now, NULL) < 0) |
---|
136 | return (evConsTime(0, 0)); |
---|
137 | return (evTimeSpec(now)); |
---|
138 | } |
---|
139 | |
---|
140 | struct timespec |
---|
141 | evUTCTime() { |
---|
142 | struct timeval now; |
---|
143 | #ifdef CLOCK_REALTIME |
---|
144 | struct timespec tsnow; |
---|
145 | if (clock_gettime(CLOCK_REALTIME, &tsnow) == 0) |
---|
146 | return (tsnow); |
---|
147 | #endif |
---|
148 | if (gettimeofday(&now, NULL) < 0) |
---|
149 | return (evConsTime(0, 0)); |
---|
150 | return (evTimeSpec(now)); |
---|
151 | } |
---|
152 | |
---|
153 | #ifndef _LIBC |
---|
154 | struct timespec |
---|
155 | evLastEventTime(evContext opaqueCtx) { |
---|
156 | evContext_p *ctx = opaqueCtx.opaque; |
---|
157 | |
---|
158 | return (ctx->lastEventTime); |
---|
159 | } |
---|
160 | #endif |
---|
161 | |
---|
162 | struct timespec |
---|
163 | evTimeSpec(struct timeval tv) { |
---|
164 | struct timespec ts; |
---|
165 | |
---|
166 | ts.tv_sec = tv.tv_sec; |
---|
167 | ts.tv_nsec = tv.tv_usec * 1000; |
---|
168 | return (ts); |
---|
169 | } |
---|
170 | |
---|
171 | #if !defined(USE_KQUEUE) || !defined(_LIBC) |
---|
172 | struct timeval |
---|
173 | evTimeVal(struct timespec ts) { |
---|
174 | struct timeval tv; |
---|
175 | |
---|
176 | tv.tv_sec = ts.tv_sec; |
---|
177 | tv.tv_usec = ts.tv_nsec / 1000; |
---|
178 | return (tv); |
---|
179 | } |
---|
180 | #endif |
---|
181 | |
---|
182 | #ifndef _LIBC |
---|
183 | int |
---|
184 | evSetTimer(evContext opaqueCtx, |
---|
185 | evTimerFunc func, |
---|
186 | void *uap, |
---|
187 | struct timespec due, |
---|
188 | struct timespec inter, |
---|
189 | evTimerID *opaqueID |
---|
190 | ) { |
---|
191 | evContext_p *ctx = opaqueCtx.opaque; |
---|
192 | evTimer *id; |
---|
193 | |
---|
194 | evPrintf(ctx, 1, |
---|
195 | "evSetTimer(ctx %p, func %p, uap %p, due %ld.%09ld, inter %ld.%09ld)\n", |
---|
196 | ctx, func, uap, |
---|
197 | (long)due.tv_sec, due.tv_nsec, |
---|
198 | (long)inter.tv_sec, inter.tv_nsec); |
---|
199 | |
---|
200 | #ifdef __hpux |
---|
201 | /* |
---|
202 | * tv_sec and tv_nsec are unsigned. |
---|
203 | */ |
---|
204 | if (due.tv_nsec >= BILLION) |
---|
205 | EV_ERR(EINVAL); |
---|
206 | |
---|
207 | if (inter.tv_nsec >= BILLION) |
---|
208 | EV_ERR(EINVAL); |
---|
209 | #else |
---|
210 | if (due.tv_sec < 0 || due.tv_nsec < 0 || due.tv_nsec >= BILLION) |
---|
211 | EV_ERR(EINVAL); |
---|
212 | |
---|
213 | if (inter.tv_sec < 0 || inter.tv_nsec < 0 || inter.tv_nsec >= BILLION) |
---|
214 | EV_ERR(EINVAL); |
---|
215 | #endif |
---|
216 | |
---|
217 | /* due={0,0} is a magic cookie meaning "now." */ |
---|
218 | if (due.tv_sec == (time_t)0 && due.tv_nsec == 0L) |
---|
219 | due = evNowTime(); |
---|
220 | |
---|
221 | /* Allocate and fill. */ |
---|
222 | OKNEW(id); |
---|
223 | id->func = func; |
---|
224 | id->uap = uap; |
---|
225 | id->due = due; |
---|
226 | id->inter = inter; |
---|
227 | |
---|
228 | if (heap_insert(ctx->timers, id) < 0) |
---|
229 | return (-1); |
---|
230 | |
---|
231 | /* Remember the ID if the caller provided us a place for it. */ |
---|
232 | if (opaqueID) |
---|
233 | opaqueID->opaque = id; |
---|
234 | |
---|
235 | if (ctx->debug > 7) { |
---|
236 | evPrintf(ctx, 7, "timers after evSetTimer:\n"); |
---|
237 | (void) heap_for_each(ctx->timers, print_timer, (void *)ctx); |
---|
238 | } |
---|
239 | |
---|
240 | return (0); |
---|
241 | } |
---|
242 | |
---|
243 | int |
---|
244 | evClearTimer(evContext opaqueCtx, evTimerID id) { |
---|
245 | evContext_p *ctx = opaqueCtx.opaque; |
---|
246 | evTimer *del = id.opaque; |
---|
247 | |
---|
248 | if (ctx->cur != NULL && |
---|
249 | ctx->cur->type == Timer && |
---|
250 | ctx->cur->u.timer.this == del) { |
---|
251 | evPrintf(ctx, 8, "deferring delete of timer (executing)\n"); |
---|
252 | /* |
---|
253 | * Setting the interval to zero ensures that evDrop() will |
---|
254 | * clean up the timer. |
---|
255 | */ |
---|
256 | del->inter = evConsTime(0, 0); |
---|
257 | return (0); |
---|
258 | } |
---|
259 | |
---|
260 | if (heap_element(ctx->timers, del->index) != del) |
---|
261 | EV_ERR(ENOENT); |
---|
262 | |
---|
263 | if (heap_delete(ctx->timers, del->index) < 0) |
---|
264 | return (-1); |
---|
265 | FREE(del); |
---|
266 | |
---|
267 | if (ctx->debug > 7) { |
---|
268 | evPrintf(ctx, 7, "timers after evClearTimer:\n"); |
---|
269 | (void) heap_for_each(ctx->timers, print_timer, (void *)ctx); |
---|
270 | } |
---|
271 | |
---|
272 | return (0); |
---|
273 | } |
---|
274 | |
---|
275 | int |
---|
276 | evConfigTimer(evContext opaqueCtx, |
---|
277 | evTimerID id, |
---|
278 | const char *param, |
---|
279 | int value |
---|
280 | ) { |
---|
281 | evContext_p *ctx = opaqueCtx.opaque; |
---|
282 | evTimer *timer = id.opaque; |
---|
283 | int result=0; |
---|
284 | |
---|
285 | UNUSED(value); |
---|
286 | |
---|
287 | if (heap_element(ctx->timers, timer->index) != timer) |
---|
288 | EV_ERR(ENOENT); |
---|
289 | |
---|
290 | if (strcmp(param, "rate") == 0) |
---|
291 | timer->mode |= EV_TMR_RATE; |
---|
292 | else if (strcmp(param, "interval") == 0) |
---|
293 | timer->mode &= ~EV_TMR_RATE; |
---|
294 | else |
---|
295 | EV_ERR(EINVAL); |
---|
296 | |
---|
297 | return (result); |
---|
298 | } |
---|
299 | |
---|
300 | int |
---|
301 | evResetTimer(evContext opaqueCtx, |
---|
302 | evTimerID id, |
---|
303 | evTimerFunc func, |
---|
304 | void *uap, |
---|
305 | struct timespec due, |
---|
306 | struct timespec inter |
---|
307 | ) { |
---|
308 | evContext_p *ctx = opaqueCtx.opaque; |
---|
309 | evTimer *timer = id.opaque; |
---|
310 | struct timespec old_due; |
---|
311 | int result=0; |
---|
312 | |
---|
313 | if (heap_element(ctx->timers, timer->index) != timer) |
---|
314 | EV_ERR(ENOENT); |
---|
315 | |
---|
316 | #ifdef __hpux |
---|
317 | /* |
---|
318 | * tv_sec and tv_nsec are unsigned. |
---|
319 | */ |
---|
320 | if (due.tv_nsec >= BILLION) |
---|
321 | EV_ERR(EINVAL); |
---|
322 | |
---|
323 | if (inter.tv_nsec >= BILLION) |
---|
324 | EV_ERR(EINVAL); |
---|
325 | #else |
---|
326 | if (due.tv_sec < 0 || due.tv_nsec < 0 || due.tv_nsec >= BILLION) |
---|
327 | EV_ERR(EINVAL); |
---|
328 | |
---|
329 | if (inter.tv_sec < 0 || inter.tv_nsec < 0 || inter.tv_nsec >= BILLION) |
---|
330 | EV_ERR(EINVAL); |
---|
331 | #endif |
---|
332 | |
---|
333 | old_due = timer->due; |
---|
334 | |
---|
335 | timer->func = func; |
---|
336 | timer->uap = uap; |
---|
337 | timer->due = due; |
---|
338 | timer->inter = inter; |
---|
339 | |
---|
340 | switch (evCmpTime(due, old_due)) { |
---|
341 | case -1: |
---|
342 | result = heap_increased(ctx->timers, timer->index); |
---|
343 | break; |
---|
344 | case 0: |
---|
345 | result = 0; |
---|
346 | break; |
---|
347 | case 1: |
---|
348 | result = heap_decreased(ctx->timers, timer->index); |
---|
349 | break; |
---|
350 | } |
---|
351 | |
---|
352 | if (ctx->debug > 7) { |
---|
353 | evPrintf(ctx, 7, "timers after evResetTimer:\n"); |
---|
354 | (void) heap_for_each(ctx->timers, print_timer, (void *)ctx); |
---|
355 | } |
---|
356 | |
---|
357 | return (result); |
---|
358 | } |
---|
359 | |
---|
360 | int |
---|
361 | evSetIdleTimer(evContext opaqueCtx, |
---|
362 | evTimerFunc func, |
---|
363 | void *uap, |
---|
364 | struct timespec max_idle, |
---|
365 | evTimerID *opaqueID |
---|
366 | ) { |
---|
367 | evContext_p *ctx = opaqueCtx.opaque; |
---|
368 | idle_timer *tt; |
---|
369 | |
---|
370 | /* Allocate and fill. */ |
---|
371 | OKNEW(tt); |
---|
372 | tt->func = func; |
---|
373 | tt->uap = uap; |
---|
374 | tt->lastTouched = ctx->lastEventTime; |
---|
375 | tt->max_idle = max_idle; |
---|
376 | |
---|
377 | if (evSetTimer(opaqueCtx, idle_timeout, tt, |
---|
378 | evAddTime(ctx->lastEventTime, max_idle), |
---|
379 | max_idle, opaqueID) < 0) { |
---|
380 | FREE(tt); |
---|
381 | return (-1); |
---|
382 | } |
---|
383 | |
---|
384 | tt->timer = opaqueID->opaque; |
---|
385 | |
---|
386 | return (0); |
---|
387 | } |
---|
388 | |
---|
389 | int |
---|
390 | evClearIdleTimer(evContext opaqueCtx, evTimerID id) { |
---|
391 | evTimer *del = id.opaque; |
---|
392 | idle_timer *tt = del->uap; |
---|
393 | |
---|
394 | FREE(tt); |
---|
395 | return (evClearTimer(opaqueCtx, id)); |
---|
396 | } |
---|
397 | |
---|
398 | int |
---|
399 | evResetIdleTimer(evContext opaqueCtx, |
---|
400 | evTimerID opaqueID, |
---|
401 | evTimerFunc func, |
---|
402 | void *uap, |
---|
403 | struct timespec max_idle |
---|
404 | ) { |
---|
405 | evContext_p *ctx = opaqueCtx.opaque; |
---|
406 | evTimer *timer = opaqueID.opaque; |
---|
407 | idle_timer *tt = timer->uap; |
---|
408 | |
---|
409 | tt->func = func; |
---|
410 | tt->uap = uap; |
---|
411 | tt->lastTouched = ctx->lastEventTime; |
---|
412 | tt->max_idle = max_idle; |
---|
413 | |
---|
414 | return (evResetTimer(opaqueCtx, opaqueID, idle_timeout, tt, |
---|
415 | evAddTime(ctx->lastEventTime, max_idle), |
---|
416 | max_idle)); |
---|
417 | } |
---|
418 | |
---|
419 | int |
---|
420 | evTouchIdleTimer(evContext opaqueCtx, evTimerID id) { |
---|
421 | evContext_p *ctx = opaqueCtx.opaque; |
---|
422 | evTimer *t = id.opaque; |
---|
423 | idle_timer *tt = t->uap; |
---|
424 | |
---|
425 | tt->lastTouched = ctx->lastEventTime; |
---|
426 | |
---|
427 | return (0); |
---|
428 | } |
---|
429 | |
---|
430 | /* Public to the rest of eventlib. */ |
---|
431 | |
---|
432 | heap_context |
---|
433 | evCreateTimers(const evContext_p *ctx) { |
---|
434 | |
---|
435 | UNUSED(ctx); |
---|
436 | |
---|
437 | return (heap_new(due_sooner, set_index, 2048)); |
---|
438 | } |
---|
439 | |
---|
440 | void |
---|
441 | evDestroyTimers(const evContext_p *ctx) { |
---|
442 | (void) heap_for_each(ctx->timers, free_timer, NULL); |
---|
443 | (void) heap_free(ctx->timers); |
---|
444 | } |
---|
445 | |
---|
446 | /* Private. */ |
---|
447 | |
---|
448 | static int |
---|
449 | due_sooner(void *a, void *b) { |
---|
450 | evTimer *a_timer, *b_timer; |
---|
451 | |
---|
452 | a_timer = a; |
---|
453 | b_timer = b; |
---|
454 | return (evCmpTime(a_timer->due, b_timer->due) < 0); |
---|
455 | } |
---|
456 | |
---|
457 | static void |
---|
458 | set_index(void *what, int index) { |
---|
459 | evTimer *timer; |
---|
460 | |
---|
461 | timer = what; |
---|
462 | timer->index = index; |
---|
463 | } |
---|
464 | |
---|
465 | static void |
---|
466 | free_timer(void *what, void *uap) { |
---|
467 | evTimer *t = what; |
---|
468 | |
---|
469 | UNUSED(uap); |
---|
470 | |
---|
471 | FREE(t); |
---|
472 | } |
---|
473 | |
---|
474 | static void |
---|
475 | print_timer(void *what, void *uap) { |
---|
476 | evTimer *cur = what; |
---|
477 | evContext_p *ctx = uap; |
---|
478 | |
---|
479 | cur = what; |
---|
480 | evPrintf(ctx, 7, |
---|
481 | " func %p, uap %p, due %ld.%09ld, inter %ld.%09ld\n", |
---|
482 | cur->func, cur->uap, |
---|
483 | (long)cur->due.tv_sec, cur->due.tv_nsec, |
---|
484 | (long)cur->inter.tv_sec, cur->inter.tv_nsec); |
---|
485 | } |
---|
486 | |
---|
487 | static void |
---|
488 | idle_timeout(evContext opaqueCtx, |
---|
489 | void *uap, |
---|
490 | struct timespec due, |
---|
491 | struct timespec inter |
---|
492 | ) { |
---|
493 | evContext_p *ctx = opaqueCtx.opaque; |
---|
494 | idle_timer *this = uap; |
---|
495 | struct timespec idle; |
---|
496 | |
---|
497 | UNUSED(due); |
---|
498 | UNUSED(inter); |
---|
499 | |
---|
500 | idle = evSubTime(ctx->lastEventTime, this->lastTouched); |
---|
501 | if (evCmpTime(idle, this->max_idle) >= 0) { |
---|
502 | (this->func)(opaqueCtx, this->uap, this->timer->due, |
---|
503 | this->max_idle); |
---|
504 | /* |
---|
505 | * Setting the interval to zero will cause the timer to |
---|
506 | * be cleaned up in evDrop(). |
---|
507 | */ |
---|
508 | this->timer->inter = evConsTime(0, 0); |
---|
509 | FREE(this); |
---|
510 | } else { |
---|
511 | /* evDrop() will reschedule the timer. */ |
---|
512 | this->timer->inter = evSubTime(this->max_idle, idle); |
---|
513 | } |
---|
514 | } |
---|
515 | #endif |
---|
516 | |
---|
517 | /*! \file */ |
---|