| 1 |
/* |
| 2 |
* libev event processing core, watcher management |
| 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 |
#ifdef __cplusplus |
| 33 |
extern "C" { |
| 34 |
#endif |
| 35 |
|
| 36 |
#ifndef EV_STANDALONE |
| 37 |
# include "config.h" |
| 38 |
|
| 39 |
# if HAVE_CLOCK_GETTIME |
| 40 |
# ifndef EV_USE_MONOTONIC |
| 41 |
# define EV_USE_MONOTONIC 1 |
| 42 |
# endif |
| 43 |
# ifndef EV_USE_REALTIME |
| 44 |
# define EV_USE_REALTIME 1 |
| 45 |
# endif |
| 46 |
# endif |
| 47 |
|
| 48 |
# if HAVE_SELECT && HAVE_SYS_SELECT_H && !defined (EV_USE_SELECT) |
| 49 |
# define EV_USE_SELECT 1 |
| 50 |
# endif |
| 51 |
|
| 52 |
# if HAVE_POLL && HAVE_POLL_H && !defined (EV_USE_POLL) |
| 53 |
# define EV_USE_POLL 1 |
| 54 |
# endif |
| 55 |
|
| 56 |
# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H && !defined (EV_USE_EPOLL) |
| 57 |
# define EV_USE_EPOLL 1 |
| 58 |
# endif |
| 59 |
|
| 60 |
# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H && !defined (EV_USE_KQUEUE) |
| 61 |
# define EV_USE_KQUEUE 1 |
| 62 |
# endif |
| 63 |
|
| 64 |
# if HAVE_PORT_H && HAVE_PORT_CREATE && !defined (EV_USE_PORT) |
| 65 |
# define EV_USE_PORT 1 |
| 66 |
# endif |
| 67 |
|
| 68 |
#endif |
| 69 |
|
| 70 |
#include <math.h> |
| 71 |
#include <stdlib.h> |
| 72 |
#include <fcntl.h> |
| 73 |
#include <stddef.h> |
| 74 |
|
| 75 |
#include <stdio.h> |
| 76 |
|
| 77 |
#include <assert.h> |
| 78 |
#include <errno.h> |
| 79 |
#include <sys/types.h> |
| 80 |
#include <time.h> |
| 81 |
|
| 82 |
#include <signal.h> |
| 83 |
|
| 84 |
#ifndef _WIN32 |
| 85 |
# include <unistd.h> |
| 86 |
# include <sys/time.h> |
| 87 |
# include <sys/wait.h> |
| 88 |
#else |
| 89 |
# define WIN32_LEAN_AND_MEAN |
| 90 |
# include <windows.h> |
| 91 |
# ifndef EV_SELECT_IS_WINSOCKET |
| 92 |
# define EV_SELECT_IS_WINSOCKET 1 |
| 93 |
# endif |
| 94 |
#endif |
| 95 |
|
| 96 |
/**/ |
| 97 |
|
| 98 |
#ifndef EV_USE_MONOTONIC |
| 99 |
# define EV_USE_MONOTONIC 0 |
| 100 |
#endif |
| 101 |
|
| 102 |
#ifndef EV_USE_REALTIME |
| 103 |
# define EV_USE_REALTIME 0 |
| 104 |
#endif |
| 105 |
|
| 106 |
#ifndef EV_USE_SELECT |
| 107 |
# define EV_USE_SELECT 1 |
| 108 |
#endif |
| 109 |
|
| 110 |
#ifndef EV_USE_POLL |
| 111 |
# ifdef _WIN32 |
| 112 |
# define EV_USE_POLL 0 |
| 113 |
# else |
| 114 |
# define EV_USE_POLL 1 |
| 115 |
# endif |
| 116 |
#endif |
| 117 |
|
| 118 |
#ifndef EV_USE_EPOLL |
| 119 |
# define EV_USE_EPOLL 0 |
| 120 |
#endif |
| 121 |
|
| 122 |
#ifndef EV_USE_KQUEUE |
| 123 |
# define EV_USE_KQUEUE 0 |
| 124 |
#endif |
| 125 |
|
| 126 |
#ifndef EV_USE_PORT |
| 127 |
# define EV_USE_PORT 0 |
| 128 |
#endif |
| 129 |
|
| 130 |
/**/ |
| 131 |
|
| 132 |
/* darwin simply cannot be helped */ |
| 133 |
#ifdef __APPLE__ |
| 134 |
# undef EV_USE_POLL |
| 135 |
# undef EV_USE_KQUEUE |
| 136 |
#endif |
| 137 |
|
| 138 |
#ifndef CLOCK_MONOTONIC |
| 139 |
# undef EV_USE_MONOTONIC |
| 140 |
# define EV_USE_MONOTONIC 0 |
| 141 |
#endif |
| 142 |
|
| 143 |
#ifndef CLOCK_REALTIME |
| 144 |
# undef EV_USE_REALTIME |
| 145 |
# define EV_USE_REALTIME 0 |
| 146 |
#endif |
| 147 |
|
| 148 |
#if EV_SELECT_IS_WINSOCKET |
| 149 |
# include <winsock.h> |
| 150 |
#endif |
| 151 |
|
| 152 |
/**/ |
| 153 |
|
| 154 |
#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ |
| 155 |
#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ |
| 156 |
#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */ |
| 157 |
/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */ |
| 158 |
|
| 159 |
#ifdef EV_H |
| 160 |
# include EV_H |
| 161 |
#else |
| 162 |
# include "ev.h" |
| 163 |
#endif |
| 164 |
|
| 165 |
#if __GNUC__ >= 3 |
| 166 |
# define expect(expr,value) __builtin_expect ((expr),(value)) |
| 167 |
# define inline static inline |
| 168 |
#else |
| 169 |
# define expect(expr,value) (expr) |
| 170 |
# define inline static |
| 171 |
#endif |
| 172 |
|
| 173 |
#define expect_false(expr) expect ((expr) != 0, 0) |
| 174 |
#define expect_true(expr) expect ((expr) != 0, 1) |
| 175 |
|
| 176 |
#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) |
| 177 |
#define ABSPRI(w) ((w)->priority - EV_MINPRI) |
| 178 |
|
| 179 |
#define EMPTY0 /* required for microsofts broken pseudo-c compiler */ |
| 180 |
#define EMPTY2(a,b) /* used to suppress some warnings */ |
| 181 |
|
| 182 |
typedef struct ev_watcher *W; |
| 183 |
typedef struct ev_watcher_list *WL; |
| 184 |
typedef struct ev_watcher_time *WT; |
| 185 |
|
| 186 |
static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ |
| 187 |
|
| 188 |
#ifdef _WIN32 |
| 189 |
# include "ev_win32.c" |
| 190 |
#endif |
| 191 |
|
| 192 |
/*****************************************************************************/ |
| 193 |
|
| 194 |
static void (*syserr_cb)(const char *msg); |
| 195 |
|
| 196 |
void ev_set_syserr_cb (void (*cb)(const char *msg)) |
| 197 |
{ |
| 198 |
syserr_cb = cb; |
| 199 |
} |
| 200 |
|
| 201 |
static void |
| 202 |
syserr (const char *msg) |
| 203 |
{ |
| 204 |
if (!msg) |
| 205 |
msg = "(libev) system error"; |
| 206 |
|
| 207 |
if (syserr_cb) |
| 208 |
syserr_cb (msg); |
| 209 |
else |
| 210 |
{ |
| 211 |
perror (msg); |
| 212 |
abort (); |
| 213 |
} |
| 214 |
} |
| 215 |
|
| 216 |
static void *(*alloc)(void *ptr, long size); |
| 217 |
|
| 218 |
void ev_set_allocator (void *(*cb)(void *ptr, long size)) |
| 219 |
{ |
| 220 |
alloc = cb; |
| 221 |
} |
| 222 |
|
| 223 |
static void * |
| 224 |
ev_realloc (void *ptr, long size) |
| 225 |
{ |
| 226 |
ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); |
| 227 |
|
| 228 |
if (!ptr && size) |
| 229 |
{ |
| 230 |
fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); |
| 231 |
abort (); |
| 232 |
} |
| 233 |
|
| 234 |
return ptr; |
| 235 |
} |
| 236 |
|
| 237 |
#define ev_malloc(size) ev_realloc (0, (size)) |
| 238 |
#define ev_free(ptr) ev_realloc ((ptr), 0) |
| 239 |
|
| 240 |
/*****************************************************************************/ |
| 241 |
|
| 242 |
typedef struct |
| 243 |
{ |
| 244 |
WL head; |
| 245 |
unsigned char events; |
| 246 |
unsigned char reify; |
| 247 |
#if EV_SELECT_IS_WINSOCKET |
| 248 |
SOCKET handle; |
| 249 |
#endif |
| 250 |
} ANFD; |
| 251 |
|
| 252 |
typedef struct |
| 253 |
{ |
| 254 |
W w; |
| 255 |
int events; |
| 256 |
} ANPENDING; |
| 257 |
|
| 258 |
#if EV_MULTIPLICITY |
| 259 |
|
| 260 |
struct ev_loop |
| 261 |
{ |
| 262 |
ev_tstamp ev_rt_now; |
| 263 |
#define ev_rt_now ((loop)->ev_rt_now) |
| 264 |
#define VAR(name,decl) decl; |
| 265 |
#include "ev_vars.h" |
| 266 |
#undef VAR |
| 267 |
}; |
| 268 |
#include "ev_wrap.h" |
| 269 |
|
| 270 |
static struct ev_loop default_loop_struct; |
| 271 |
struct ev_loop *ev_default_loop_ptr; |
| 272 |
|
| 273 |
#else |
| 274 |
|
| 275 |
ev_tstamp ev_rt_now; |
| 276 |
#define VAR(name,decl) static decl; |
| 277 |
#include "ev_vars.h" |
| 278 |
#undef VAR |
| 279 |
|
| 280 |
static int ev_default_loop_ptr; |
| 281 |
|
| 282 |
#endif |
| 283 |
|
| 284 |
/*****************************************************************************/ |
| 285 |
|
| 286 |
ev_tstamp |
| 287 |
ev_time (void) |
| 288 |
{ |
| 289 |
#if EV_USE_REALTIME |
| 290 |
struct timespec ts; |
| 291 |
clock_gettime (CLOCK_REALTIME, &ts); |
| 292 |
return ts.tv_sec + ts.tv_nsec * 1e-9; |
| 293 |
#else |
| 294 |
struct timeval tv; |
| 295 |
gettimeofday (&tv, 0); |
| 296 |
return tv.tv_sec + tv.tv_usec * 1e-6; |
| 297 |
#endif |
| 298 |
} |
| 299 |
|
| 300 |
inline ev_tstamp |
| 301 |
get_clock (void) |
| 302 |
{ |
| 303 |
#if EV_USE_MONOTONIC |
| 304 |
if (expect_true (have_monotonic)) |
| 305 |
{ |
| 306 |
struct timespec ts; |
| 307 |
clock_gettime (CLOCK_MONOTONIC, &ts); |
| 308 |
return ts.tv_sec + ts.tv_nsec * 1e-9; |
| 309 |
} |
| 310 |
#endif |
| 311 |
|
| 312 |
return ev_time (); |
| 313 |
} |
| 314 |
|
| 315 |
#if EV_MULTIPLICITY |
| 316 |
ev_tstamp |
| 317 |
ev_now (EV_P) |
| 318 |
{ |
| 319 |
return ev_rt_now; |
| 320 |
} |
| 321 |
#endif |
| 322 |
|
| 323 |
#define array_roundsize(type,n) (((n) | 4) & ~3) |
| 324 |
|
| 325 |
#define array_needsize(type,base,cur,cnt,init) \ |
| 326 |
if (expect_false ((cnt) > cur)) \ |
| 327 |
{ \ |
| 328 |
int newcnt = cur; \ |
| 329 |
do \ |
| 330 |
{ \ |
| 331 |
newcnt = array_roundsize (type, newcnt << 1); \ |
| 332 |
} \ |
| 333 |
while ((cnt) > newcnt); \ |
| 334 |
\ |
| 335 |
base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\ |
| 336 |
init (base + cur, newcnt - cur); \ |
| 337 |
cur = newcnt; \ |
| 338 |
} |
| 339 |
|
| 340 |
#define array_slim(type,stem) \ |
| 341 |
if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ |
| 342 |
{ \ |
| 343 |
stem ## max = array_roundsize (stem ## cnt >> 1); \ |
| 344 |
base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\ |
| 345 |
fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ |
| 346 |
} |
| 347 |
|
| 348 |
#define array_free(stem, idx) \ |
| 349 |
ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; |
| 350 |
|
| 351 |
/*****************************************************************************/ |
| 352 |
|
| 353 |
static void |
| 354 |
anfds_init (ANFD *base, int count) |
| 355 |
{ |
| 356 |
while (count--) |
| 357 |
{ |
| 358 |
base->head = 0; |
| 359 |
base->events = EV_NONE; |
| 360 |
base->reify = 0; |
| 361 |
|
| 362 |
++base; |
| 363 |
} |
| 364 |
} |
| 365 |
|
| 366 |
void |
| 367 |
ev_feed_event (EV_P_ void *w, int revents) |
| 368 |
{ |
| 369 |
W w_ = (W)w; |
| 370 |
|
| 371 |
if (expect_false (w_->pending)) |
| 372 |
{ |
| 373 |
pendings [ABSPRI (w_)][w_->pending - 1].events |= revents; |
| 374 |
return; |
| 375 |
} |
| 376 |
|
| 377 |
w_->pending = ++pendingcnt [ABSPRI (w_)]; |
| 378 |
array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2); |
| 379 |
pendings [ABSPRI (w_)][w_->pending - 1].w = w_; |
| 380 |
pendings [ABSPRI (w_)][w_->pending - 1].events = revents; |
| 381 |
} |
| 382 |
|
| 383 |
static void |
| 384 |
queue_events (EV_P_ W *events, int eventcnt, int type) |
| 385 |
{ |
| 386 |
int i; |
| 387 |
|
| 388 |
for (i = 0; i < eventcnt; ++i) |
| 389 |
ev_feed_event (EV_A_ events [i], type); |
| 390 |
} |
| 391 |
|
| 392 |
inline void |
| 393 |
fd_event (EV_P_ int fd, int revents) |
| 394 |
{ |
| 395 |
ANFD *anfd = anfds + fd; |
| 396 |
struct ev_io *w; |
| 397 |
|
| 398 |
for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) |
| 399 |
{ |
| 400 |
int ev = w->events & revents; |
| 401 |
|
| 402 |
if (ev) |
| 403 |
ev_feed_event (EV_A_ (W)w, ev); |
| 404 |
} |
| 405 |
} |
| 406 |
|
| 407 |
void |
| 408 |
ev_feed_fd_event (EV_P_ int fd, int revents) |
| 409 |
{ |
| 410 |
fd_event (EV_A_ fd, revents); |
| 411 |
} |
| 412 |
|
| 413 |
/*****************************************************************************/ |
| 414 |
|
| 415 |
inline void |
| 416 |
fd_reify (EV_P) |
| 417 |
{ |
| 418 |
int i; |
| 419 |
|
| 420 |
for (i = 0; i < fdchangecnt; ++i) |
| 421 |
{ |
| 422 |
int fd = fdchanges [i]; |
| 423 |
ANFD *anfd = anfds + fd; |
| 424 |
struct ev_io *w; |
| 425 |
|
| 426 |
int events = 0; |
| 427 |
|
| 428 |
for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) |
| 429 |
events |= w->events; |
| 430 |
|
| 431 |
#if EV_SELECT_IS_WINSOCKET |
| 432 |
if (events) |
| 433 |
{ |
| 434 |
unsigned long argp; |
| 435 |
anfd->handle = _get_osfhandle (fd); |
| 436 |
assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0)); |
| 437 |
} |
| 438 |
#endif |
| 439 |
|
| 440 |
anfd->reify = 0; |
| 441 |
|
| 442 |
method_modify (EV_A_ fd, anfd->events, events); |
| 443 |
anfd->events = events; |
| 444 |
} |
| 445 |
|
| 446 |
fdchangecnt = 0; |
| 447 |
} |
| 448 |
|
| 449 |
static void |
| 450 |
fd_change (EV_P_ int fd) |
| 451 |
{ |
| 452 |
if (expect_false (anfds [fd].reify)) |
| 453 |
return; |
| 454 |
|
| 455 |
anfds [fd].reify = 1; |
| 456 |
|
| 457 |
++fdchangecnt; |
| 458 |
array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); |
| 459 |
fdchanges [fdchangecnt - 1] = fd; |
| 460 |
} |
| 461 |
|
| 462 |
static void |
| 463 |
fd_kill (EV_P_ int fd) |
| 464 |
{ |
| 465 |
struct ev_io *w; |
| 466 |
|
| 467 |
while ((w = (struct ev_io *)anfds [fd].head)) |
| 468 |
{ |
| 469 |
ev_io_stop (EV_A_ w); |
| 470 |
ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); |
| 471 |
} |
| 472 |
} |
| 473 |
|
| 474 |
inline int |
| 475 |
fd_valid (int fd) |
| 476 |
{ |
| 477 |
#ifdef _WIN32 |
| 478 |
return _get_osfhandle (fd) != -1; |
| 479 |
#else |
| 480 |
return fcntl (fd, F_GETFD) != -1; |
| 481 |
#endif |
| 482 |
} |
| 483 |
|
| 484 |
/* called on EBADF to verify fds */ |
| 485 |
static void |
| 486 |
fd_ebadf (EV_P) |
| 487 |
{ |
| 488 |
int fd; |
| 489 |
|
| 490 |
for (fd = 0; fd < anfdmax; ++fd) |
| 491 |
if (anfds [fd].events) |
| 492 |
if (!fd_valid (fd) == -1 && errno == EBADF) |
| 493 |
fd_kill (EV_A_ fd); |
| 494 |
} |
| 495 |
|
| 496 |
/* called on ENOMEM in select/poll to kill some fds and retry */ |
| 497 |
static void |
| 498 |
fd_enomem (EV_P) |
| 499 |
{ |
| 500 |
int fd; |
| 501 |
|
| 502 |
for (fd = anfdmax; fd--; ) |
| 503 |
if (anfds [fd].events) |
| 504 |
{ |
| 505 |
fd_kill (EV_A_ fd); |
| 506 |
return; |
| 507 |
} |
| 508 |
} |
| 509 |
|
| 510 |
/* usually called after fork if method needs to re-arm all fds from scratch */ |
| 511 |
static void |
| 512 |
fd_rearm_all (EV_P) |
| 513 |
{ |
| 514 |
int fd; |
| 515 |
|
| 516 |
/* this should be highly optimised to not do anything but set a flag */ |
| 517 |
for (fd = 0; fd < anfdmax; ++fd) |
| 518 |
if (anfds [fd].events) |
| 519 |
{ |
| 520 |
anfds [fd].events = 0; |
| 521 |
fd_change (EV_A_ fd); |
| 522 |
} |
| 523 |
} |
| 524 |
|
| 525 |
/*****************************************************************************/ |
| 526 |
|
| 527 |
static void |
| 528 |
upheap (WT *heap, int k) |
| 529 |
{ |
| 530 |
WT w = heap [k]; |
| 531 |
|
| 532 |
while (k && heap [k >> 1]->at > w->at) |
| 533 |
{ |
| 534 |
heap [k] = heap [k >> 1]; |
| 535 |
((W)heap [k])->active = k + 1; |
| 536 |
k >>= 1; |
| 537 |
} |
| 538 |
|
| 539 |
heap [k] = w; |
| 540 |
((W)heap [k])->active = k + 1; |
| 541 |
|
| 542 |
} |
| 543 |
|
| 544 |
static void |
| 545 |
downheap (WT *heap, int N, int k) |
| 546 |
{ |
| 547 |
WT w = heap [k]; |
| 548 |
|
| 549 |
while (k < (N >> 1)) |
| 550 |
{ |
| 551 |
int j = k << 1; |
| 552 |
|
| 553 |
if (j + 1 < N && heap [j]->at > heap [j + 1]->at) |
| 554 |
++j; |
| 555 |
|
| 556 |
if (w->at <= heap [j]->at) |
| 557 |
break; |
| 558 |
|
| 559 |
heap [k] = heap [j]; |
| 560 |
((W)heap [k])->active = k + 1; |
| 561 |
k = j; |
| 562 |
} |
| 563 |
|
| 564 |
heap [k] = w; |
| 565 |
((W)heap [k])->active = k + 1; |
| 566 |
} |
| 567 |
|
| 568 |
inline void |
| 569 |
adjustheap (WT *heap, int N, int k) |
| 570 |
{ |
| 571 |
upheap (heap, k); |
| 572 |
downheap (heap, N, k); |
| 573 |
} |
| 574 |
|
| 575 |
/*****************************************************************************/ |
| 576 |
|
| 577 |
typedef struct |
| 578 |
{ |
| 579 |
WL head; |
| 580 |
sig_atomic_t volatile gotsig; |
| 581 |
} ANSIG; |
| 582 |
|
| 583 |
static ANSIG *signals; |
| 584 |
static int signalmax; |
| 585 |
|
| 586 |
static int sigpipe [2]; |
| 587 |
static sig_atomic_t volatile gotsig; |
| 588 |
static struct ev_io sigev; |
| 589 |
|
| 590 |
static void |
| 591 |
signals_init (ANSIG *base, int count) |
| 592 |
{ |
| 593 |
while (count--) |
| 594 |
{ |
| 595 |
base->head = 0; |
| 596 |
base->gotsig = 0; |
| 597 |
|
| 598 |
++base; |
| 599 |
} |
| 600 |
} |
| 601 |
|
| 602 |
static void |
| 603 |
sighandler (int signum) |
| 604 |
{ |
| 605 |
#if _WIN32 |
| 606 |
signal (signum, sighandler); |
| 607 |
#endif |
| 608 |
|
| 609 |
signals [signum - 1].gotsig = 1; |
| 610 |
|
| 611 |
if (!gotsig) |
| 612 |
{ |
| 613 |
int old_errno = errno; |
| 614 |
gotsig = 1; |
| 615 |
write (sigpipe [1], &signum, 1); |
| 616 |
errno = old_errno; |
| 617 |
} |
| 618 |
} |
| 619 |
|
| 620 |
void |
| 621 |
ev_feed_signal_event (EV_P_ int signum) |
| 622 |
{ |
| 623 |
WL w; |
| 624 |
|
| 625 |
#if EV_MULTIPLICITY |
| 626 |
assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr)); |
| 627 |
#endif |
| 628 |
|
| 629 |
--signum; |
| 630 |
|
| 631 |
if (signum < 0 || signum >= signalmax) |
| 632 |
return; |
| 633 |
|
| 634 |
signals [signum].gotsig = 0; |
| 635 |
|
| 636 |
for (w = signals [signum].head; w; w = w->next) |
| 637 |
ev_feed_event (EV_A_ (W)w, EV_SIGNAL); |
| 638 |
} |
| 639 |
|
| 640 |
static void |
| 641 |
sigcb (EV_P_ struct ev_io *iow, int revents) |
| 642 |
{ |
| 643 |
int signum; |
| 644 |
|
| 645 |
read (sigpipe [0], &revents, 1); |
| 646 |
gotsig = 0; |
| 647 |
|
| 648 |
for (signum = signalmax; signum--; ) |
| 649 |
if (signals [signum].gotsig) |
| 650 |
ev_feed_signal_event (EV_A_ signum + 1); |
| 651 |
} |
| 652 |
|
| 653 |
static void |
| 654 |
fd_intern (int fd) |
| 655 |
{ |
| 656 |
#ifdef _WIN32 |
| 657 |
int arg = 1; |
| 658 |
ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg); |
| 659 |
#else |
| 660 |
fcntl (fd, F_SETFD, FD_CLOEXEC); |
| 661 |
fcntl (fd, F_SETFL, O_NONBLOCK); |
| 662 |
#endif |
| 663 |
} |
| 664 |
|
| 665 |
static void |
| 666 |
siginit (EV_P) |
| 667 |
{ |
| 668 |
fd_intern (sigpipe [0]); |
| 669 |
fd_intern (sigpipe [1]); |
| 670 |
|
| 671 |
ev_io_set (&sigev, sigpipe [0], EV_READ); |
| 672 |
ev_io_start (EV_A_ &sigev); |
| 673 |
ev_unref (EV_A); /* child watcher should not keep loop alive */ |
| 674 |
} |
| 675 |
|
| 676 |
/*****************************************************************************/ |
| 677 |
|
| 678 |
static struct ev_child *childs [PID_HASHSIZE]; |
| 679 |
|
| 680 |
#ifndef _WIN32 |
| 681 |
|
| 682 |
static struct ev_signal childev; |
| 683 |
|
| 684 |
#ifndef WCONTINUED |
| 685 |
# define WCONTINUED 0 |
| 686 |
#endif |
| 687 |
|
| 688 |
static void |
| 689 |
child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status) |
| 690 |
{ |
| 691 |
struct ev_child *w; |
| 692 |
|
| 693 |
for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next) |
| 694 |
if (w->pid == pid || !w->pid) |
| 695 |
{ |
| 696 |
ev_priority (w) = ev_priority (sw); /* need to do it *now* */ |
| 697 |
w->rpid = pid; |
| 698 |
w->rstatus = status; |
| 699 |
ev_feed_event (EV_A_ (W)w, EV_CHILD); |
| 700 |
} |
| 701 |
} |
| 702 |
|
| 703 |
static void |
| 704 |
childcb (EV_P_ struct ev_signal *sw, int revents) |
| 705 |
{ |
| 706 |
int pid, status; |
| 707 |
|
| 708 |
if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) |
| 709 |
{ |
| 710 |
/* make sure we are called again until all childs have been reaped */ |
| 711 |
ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); |
| 712 |
|
| 713 |
child_reap (EV_A_ sw, pid, pid, status); |
| 714 |
child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */ |
| 715 |
} |
| 716 |
} |
| 717 |
|
| 718 |
#endif |
| 719 |
|
| 720 |
/*****************************************************************************/ |
| 721 |
|
| 722 |
#if EV_USE_PORT |
| 723 |
# include "ev_port.c" |
| 724 |
#endif |
| 725 |
#if EV_USE_KQUEUE |
| 726 |
# include "ev_kqueue.c" |
| 727 |
#endif |
| 728 |
#if EV_USE_EPOLL |
| 729 |
# include "ev_epoll.c" |
| 730 |
#endif |
| 731 |
#if EV_USE_POLL |
| 732 |
# include "ev_poll.c" |
| 733 |
#endif |
| 734 |
#if EV_USE_SELECT |
| 735 |
# include "ev_select.c" |
| 736 |
#endif |
| 737 |
|
| 738 |
int |
| 739 |
ev_version_major (void) |
| 740 |
{ |
| 741 |
return EV_VERSION_MAJOR; |
| 742 |
} |
| 743 |
|
| 744 |
int |
| 745 |
ev_version_minor (void) |
| 746 |
{ |
| 747 |
return EV_VERSION_MINOR; |
| 748 |
} |
| 749 |
|
| 750 |
/* return true if we are running with elevated privileges and should ignore env variables */ |
| 751 |
static int |
| 752 |
enable_secure (void) |
| 753 |
{ |
| 754 |
#ifdef _WIN32 |
| 755 |
return 0; |
| 756 |
#else |
| 757 |
return getuid () != geteuid () |
| 758 |
|| getgid () != getegid (); |
| 759 |
#endif |
| 760 |
} |
| 761 |
|
| 762 |
unsigned int |
| 763 |
ev_method (EV_P) |
| 764 |
{ |
| 765 |
return method; |
| 766 |
} |
| 767 |
|
| 768 |
static void |
| 769 |
loop_init (EV_P_ unsigned int flags) |
| 770 |
{ |
| 771 |
if (!method) |
| 772 |
{ |
| 773 |
#if EV_USE_MONOTONIC |
| 774 |
{ |
| 775 |
struct timespec ts; |
| 776 |
if (!clock_gettime (CLOCK_MONOTONIC, &ts)) |
| 777 |
have_monotonic = 1; |
| 778 |
} |
| 779 |
#endif |
| 780 |
|
| 781 |
ev_rt_now = ev_time (); |
| 782 |
mn_now = get_clock (); |
| 783 |
now_floor = mn_now; |
| 784 |
rtmn_diff = ev_rt_now - mn_now; |
| 785 |
|
| 786 |
if (!(flags & EVFLAG_NOENV) && !enable_secure () && getenv ("LIBEV_FLAGS")) |
| 787 |
flags = atoi (getenv ("LIBEV_FLAGS")); |
| 788 |
|
| 789 |
if (!(flags & 0x0000ffff)) |
| 790 |
flags |= 0x0000ffff; |
| 791 |
|
| 792 |
method = 0; |
| 793 |
#if EV_USE_PORT |
| 794 |
if (!method && (flags & EVMETHOD_PORT )) method = port_init (EV_A_ flags); |
| 795 |
#endif |
| 796 |
#if EV_USE_KQUEUE |
| 797 |
if (!method && (flags & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ flags); |
| 798 |
#endif |
| 799 |
#if EV_USE_EPOLL |
| 800 |
if (!method && (flags & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ flags); |
| 801 |
#endif |
| 802 |
#if EV_USE_POLL |
| 803 |
if (!method && (flags & EVMETHOD_POLL )) method = poll_init (EV_A_ flags); |
| 804 |
#endif |
| 805 |
#if EV_USE_SELECT |
| 806 |
if (!method && (flags & EVMETHOD_SELECT)) method = select_init (EV_A_ flags); |
| 807 |
#endif |
| 808 |
|
| 809 |
ev_init (&sigev, sigcb); |
| 810 |
ev_set_priority (&sigev, EV_MAXPRI); |
| 811 |
} |
| 812 |
} |
| 813 |
|
| 814 |
static void |
| 815 |
loop_destroy (EV_P) |
| 816 |
{ |
| 817 |
int i; |
| 818 |
|
| 819 |
#if EV_USE_PORT |
| 820 |
if (method == EVMETHOD_PORT ) port_destroy (EV_A); |
| 821 |
#endif |
| 822 |
#if EV_USE_KQUEUE |
| 823 |
if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A); |
| 824 |
#endif |
| 825 |
#if EV_USE_EPOLL |
| 826 |
if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A); |
| 827 |
#endif |
| 828 |
#if EV_USE_POLL |
| 829 |
if (method == EVMETHOD_POLL ) poll_destroy (EV_A); |
| 830 |
#endif |
| 831 |
#if EV_USE_SELECT |
| 832 |
if (method == EVMETHOD_SELECT) select_destroy (EV_A); |
| 833 |
#endif |
| 834 |
|
| 835 |
for (i = NUMPRI; i--; ) |
| 836 |
array_free (pending, [i]); |
| 837 |
|
| 838 |
/* have to use the microsoft-never-gets-it-right macro */ |
| 839 |
array_free (fdchange, EMPTY0); |
| 840 |
array_free (timer, EMPTY0); |
| 841 |
#if EV_PERIODICS |
| 842 |
array_free (periodic, EMPTY0); |
| 843 |
#endif |
| 844 |
array_free (idle, EMPTY0); |
| 845 |
array_free (prepare, EMPTY0); |
| 846 |
array_free (check, EMPTY0); |
| 847 |
|
| 848 |
method = 0; |
| 849 |
} |
| 850 |
|
| 851 |
static void |
| 852 |
loop_fork (EV_P) |
| 853 |
{ |
| 854 |
#if EV_USE_PORT |
| 855 |
if (method == EVMETHOD_PORT ) port_fork (EV_A); |
| 856 |
#endif |
| 857 |
#if EV_USE_KQUEUE |
| 858 |
if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A); |
| 859 |
#endif |
| 860 |
#if EV_USE_EPOLL |
| 861 |
if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A); |
| 862 |
#endif |
| 863 |
|
| 864 |
if (ev_is_active (&sigev)) |
| 865 |
{ |
| 866 |
/* default loop */ |
| 867 |
|
| 868 |
ev_ref (EV_A); |
| 869 |
ev_io_stop (EV_A_ &sigev); |
| 870 |
close (sigpipe [0]); |
| 871 |
close (sigpipe [1]); |
| 872 |
|
| 873 |
while (pipe (sigpipe)) |
| 874 |
syserr ("(libev) error creating pipe"); |
| 875 |
|
| 876 |
siginit (EV_A); |
| 877 |
} |
| 878 |
|
| 879 |
postfork = 0; |
| 880 |
} |
| 881 |
|
| 882 |
#if EV_MULTIPLICITY |
| 883 |
struct ev_loop * |
| 884 |
ev_loop_new (unsigned int flags) |
| 885 |
{ |
| 886 |
struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); |
| 887 |
|
| 888 |
memset (loop, 0, sizeof (struct ev_loop)); |
| 889 |
|
| 890 |
loop_init (EV_A_ flags); |
| 891 |
|
| 892 |
if (ev_method (EV_A)) |
| 893 |
return loop; |
| 894 |
|
| 895 |
return 0; |
| 896 |
} |
| 897 |
|
| 898 |
void |
| 899 |
ev_loop_destroy (EV_P) |
| 900 |
{ |
| 901 |
loop_destroy (EV_A); |
| 902 |
ev_free (loop); |
| 903 |
} |
| 904 |
|
| 905 |
void |
| 906 |
ev_loop_fork (EV_P) |
| 907 |
{ |
| 908 |
postfork = 1; |
| 909 |
} |
| 910 |
|
| 911 |
#endif |
| 912 |
|
| 913 |
#if EV_MULTIPLICITY |
| 914 |
struct ev_loop * |
| 915 |
ev_default_loop_init (unsigned int flags) |
| 916 |
#else |
| 917 |
int |
| 918 |
ev_default_loop (unsigned int flags) |
| 919 |
#endif |
| 920 |
{ |
| 921 |
if (sigpipe [0] == sigpipe [1]) |
| 922 |
if (pipe (sigpipe)) |
| 923 |
return 0; |
| 924 |
|
| 925 |
if (!ev_default_loop_ptr) |
| 926 |
{ |
| 927 |
#if EV_MULTIPLICITY |
| 928 |
struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; |
| 929 |
#else |
| 930 |
ev_default_loop_ptr = 1; |
| 931 |
#endif |
| 932 |
|
| 933 |
loop_init (EV_A_ flags); |
| 934 |
|
| 935 |
if (ev_method (EV_A)) |
| 936 |
{ |
| 937 |
siginit (EV_A); |
| 938 |
|
| 939 |
#ifndef _WIN32 |
| 940 |
ev_signal_init (&childev, childcb, SIGCHLD); |
| 941 |
ev_set_priority (&childev, EV_MAXPRI); |
| 942 |
ev_signal_start (EV_A_ &childev); |
| 943 |
ev_unref (EV_A); /* child watcher should not keep loop alive */ |
| 944 |
#endif |
| 945 |
} |
| 946 |
else |
| 947 |
ev_default_loop_ptr = 0; |
| 948 |
} |
| 949 |
|
| 950 |
return ev_default_loop_ptr; |
| 951 |
} |
| 952 |
|
| 953 |
void |
| 954 |
ev_default_destroy (void) |
| 955 |
{ |
| 956 |
#if EV_MULTIPLICITY |
| 957 |
struct ev_loop *loop = ev_default_loop_ptr; |
| 958 |
#endif |
| 959 |
|
| 960 |
#ifndef _WIN32 |
| 961 |
ev_ref (EV_A); /* child watcher */ |
| 962 |
ev_signal_stop (EV_A_ &childev); |
| 963 |
#endif |
| 964 |
|
| 965 |
ev_ref (EV_A); /* signal watcher */ |
| 966 |
ev_io_stop (EV_A_ &sigev); |
| 967 |
|
| 968 |
close (sigpipe [0]); sigpipe [0] = 0; |
| 969 |
close (sigpipe [1]); sigpipe [1] = 0; |
| 970 |
|
| 971 |
loop_destroy (EV_A); |
| 972 |
} |
| 973 |
|
| 974 |
void |
| 975 |
ev_default_fork (void) |
| 976 |
{ |
| 977 |
#if EV_MULTIPLICITY |
| 978 |
struct ev_loop *loop = ev_default_loop_ptr; |
| 979 |
#endif |
| 980 |
|
| 981 |
if (method) |
| 982 |
postfork = 1; |
| 983 |
} |
| 984 |
|
| 985 |
/*****************************************************************************/ |
| 986 |
|
| 987 |
static int |
| 988 |
any_pending (EV_P) |
| 989 |
{ |
| 990 |
int pri; |
| 991 |
|
| 992 |
for (pri = NUMPRI; pri--; ) |
| 993 |
if (pendingcnt [pri]) |
| 994 |
return 1; |
| 995 |
|
| 996 |
return 0; |
| 997 |
} |
| 998 |
|
| 999 |
inline void |
| 1000 |
call_pending (EV_P) |
| 1001 |
{ |
| 1002 |
int pri; |
| 1003 |
|
| 1004 |
for (pri = NUMPRI; pri--; ) |
| 1005 |
while (pendingcnt [pri]) |
| 1006 |
{ |
| 1007 |
ANPENDING *p = pendings [pri] + --pendingcnt [pri]; |
| 1008 |
|
| 1009 |
if (expect_true (p->w)) |
| 1010 |
{ |
| 1011 |
p->w->pending = 0; |
| 1012 |
EV_CB_INVOKE (p->w, p->events); |
| 1013 |
} |
| 1014 |
} |
| 1015 |
} |
| 1016 |
|
| 1017 |
inline void |
| 1018 |
timers_reify (EV_P) |
| 1019 |
{ |
| 1020 |
while (timercnt && ((WT)timers [0])->at <= mn_now) |
| 1021 |
{ |
| 1022 |
struct ev_timer *w = timers [0]; |
| 1023 |
|
| 1024 |
assert (("inactive timer on timer heap detected", ev_is_active (w))); |
| 1025 |
|
| 1026 |
/* first reschedule or stop timer */ |
| 1027 |
if (w->repeat) |
| 1028 |
{ |
| 1029 |
assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); |
| 1030 |
|
| 1031 |
((WT)w)->at += w->repeat; |
| 1032 |
if (((WT)w)->at < mn_now) |
| 1033 |
((WT)w)->at = mn_now; |
| 1034 |
|
| 1035 |
downheap ((WT *)timers, timercnt, 0); |
| 1036 |
} |
| 1037 |
else |
| 1038 |
ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */ |
| 1039 |
|
| 1040 |
ev_feed_event (EV_A_ (W)w, EV_TIMEOUT); |
| 1041 |
} |
| 1042 |
} |
| 1043 |
|
| 1044 |
#if EV_PERIODICS |
| 1045 |
inline void |
| 1046 |
periodics_reify (EV_P) |
| 1047 |
{ |
| 1048 |
while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now) |
| 1049 |
{ |
| 1050 |
struct ev_periodic *w = periodics [0]; |
| 1051 |
|
| 1052 |
assert (("inactive timer on periodic heap detected", ev_is_active (w))); |
| 1053 |
|
| 1054 |
/* first reschedule or stop timer */ |
| 1055 |
if (w->reschedule_cb) |
| 1056 |
{ |
| 1057 |
((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001); |
| 1058 |
assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now)); |
| 1059 |
downheap ((WT *)periodics, periodiccnt, 0); |
| 1060 |
} |
| 1061 |
else if (w->interval) |
| 1062 |
{ |
| 1063 |
((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval; |
| 1064 |
assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now)); |
| 1065 |
downheap ((WT *)periodics, periodiccnt, 0); |
| 1066 |
} |
| 1067 |
else |
| 1068 |
ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ |
| 1069 |
|
| 1070 |
ev_feed_event (EV_A_ (W)w, EV_PERIODIC); |
| 1071 |
} |
| 1072 |
} |
| 1073 |
|
| 1074 |
static void |
| 1075 |
periodics_reschedule (EV_P) |
| 1076 |
{ |
| 1077 |
int i; |
| 1078 |
|
| 1079 |
/* adjust periodics after time jump */ |
| 1080 |
for (i = 0; i < periodiccnt; ++i) |
| 1081 |
{ |
| 1082 |
struct ev_periodic *w = periodics [i]; |
| 1083 |
|
| 1084 |
if (w->reschedule_cb) |
| 1085 |
((WT)w)->at = w->reschedule_cb (w, ev_rt_now); |
| 1086 |
else if (w->interval) |
| 1087 |
((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval; |
| 1088 |
} |
| 1089 |
|
| 1090 |
/* now rebuild the heap */ |
| 1091 |
for (i = periodiccnt >> 1; i--; ) |
| 1092 |
downheap ((WT *)periodics, periodiccnt, i); |
| 1093 |
} |
| 1094 |
#endif |
| 1095 |
|
| 1096 |
inline int |
| 1097 |
time_update_monotonic (EV_P) |
| 1098 |
{ |
| 1099 |
mn_now = get_clock (); |
| 1100 |
|
| 1101 |
if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5)) |
| 1102 |
{ |
| 1103 |
ev_rt_now = rtmn_diff + mn_now; |
| 1104 |
return 0; |
| 1105 |
} |
| 1106 |
else |
| 1107 |
{ |
| 1108 |
now_floor = mn_now; |
| 1109 |
ev_rt_now = ev_time (); |
| 1110 |
return 1; |
| 1111 |
} |
| 1112 |
} |
| 1113 |
|
| 1114 |
inline void |
| 1115 |
time_update (EV_P) |
| 1116 |
{ |
| 1117 |
int i; |
| 1118 |
|
| 1119 |
#if EV_USE_MONOTONIC |
| 1120 |
if (expect_true (have_monotonic)) |
| 1121 |
{ |
| 1122 |
if (time_update_monotonic (EV_A)) |
| 1123 |
{ |
| 1124 |
ev_tstamp odiff = rtmn_diff; |
| 1125 |
|
| 1126 |
for (i = 4; --i; ) /* loop a few times, before making important decisions */ |
| 1127 |
{ |
| 1128 |
rtmn_diff = ev_rt_now - mn_now; |
| 1129 |
|
| 1130 |
if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) |
| 1131 |
return; /* all is well */ |
| 1132 |
|
| 1133 |
ev_rt_now = ev_time (); |
| 1134 |
mn_now = get_clock (); |
| 1135 |
now_floor = mn_now; |
| 1136 |
} |
| 1137 |
|
| 1138 |
# if EV_PERIODICS |
| 1139 |
periodics_reschedule (EV_A); |
| 1140 |
# endif |
| 1141 |
/* no timer adjustment, as the monotonic clock doesn't jump */ |
| 1142 |
/* timers_reschedule (EV_A_ rtmn_diff - odiff) */ |
| 1143 |
} |
| 1144 |
} |
| 1145 |
else |
| 1146 |
#endif |
| 1147 |
{ |
| 1148 |
ev_rt_now = ev_time (); |
| 1149 |
|
| 1150 |
if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP)) |
| 1151 |
{ |
| 1152 |
#if EV_PERIODICS |
| 1153 |
periodics_reschedule (EV_A); |
| 1154 |
#endif |
| 1155 |
|
| 1156 |
/* adjust timers. this is easy, as the offset is the same for all */ |
| 1157 |
for (i = 0; i < timercnt; ++i) |
| 1158 |
((WT)timers [i])->at += ev_rt_now - mn_now; |
| 1159 |
} |
| 1160 |
|
| 1161 |
mn_now = ev_rt_now; |
| 1162 |
} |
| 1163 |
} |
| 1164 |
|
| 1165 |
void |
| 1166 |
ev_ref (EV_P) |
| 1167 |
{ |
| 1168 |
++activecnt; |
| 1169 |
} |
| 1170 |
|
| 1171 |
void |
| 1172 |
ev_unref (EV_P) |
| 1173 |
{ |
| 1174 |
--activecnt; |
| 1175 |
} |
| 1176 |
|
| 1177 |
static int loop_done; |
| 1178 |
|
| 1179 |
void |
| 1180 |
ev_loop (EV_P_ int flags) |
| 1181 |
{ |
| 1182 |
double block; |
| 1183 |
loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0; |
| 1184 |
|
| 1185 |
while (activecnt) |
| 1186 |
{ |
| 1187 |
/* queue check watchers (and execute them) */ |
| 1188 |
if (expect_false (preparecnt)) |
| 1189 |
{ |
| 1190 |
queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); |
| 1191 |
call_pending (EV_A); |
| 1192 |
} |
| 1193 |
|
| 1194 |
/* we might have forked, so reify kernel state if necessary */ |
| 1195 |
if (expect_false (postfork)) |
| 1196 |
loop_fork (EV_A); |
| 1197 |
|
| 1198 |
/* update fd-related kernel structures */ |
| 1199 |
fd_reify (EV_A); |
| 1200 |
|
| 1201 |
/* calculate blocking time */ |
| 1202 |
|
| 1203 |
/* we only need this for !monotonic clock or timers, but as we basically |
| 1204 |
always have timers, we just calculate it always */ |
| 1205 |
#if EV_USE_MONOTONIC |
| 1206 |
if (expect_true (have_monotonic)) |
| 1207 |
time_update_monotonic (EV_A); |
| 1208 |
else |
| 1209 |
#endif |
| 1210 |
{ |
| 1211 |
ev_rt_now = ev_time (); |
| 1212 |
mn_now = ev_rt_now; |
| 1213 |
} |
| 1214 |
|
| 1215 |
if (flags & EVLOOP_NONBLOCK || idlecnt) |
| 1216 |
block = 0.; |
| 1217 |
else |
| 1218 |
{ |
| 1219 |
block = MAX_BLOCKTIME; |
| 1220 |
|
| 1221 |
if (timercnt) |
| 1222 |
{ |
| 1223 |
ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge; |
| 1224 |
if (block > to) block = to; |
| 1225 |
} |
| 1226 |
|
| 1227 |
#if EV_PERIODICS |
| 1228 |
if (periodiccnt) |
| 1229 |
{ |
| 1230 |
ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + method_fudge; |
| 1231 |
if (block > to) block = to; |
| 1232 |
} |
| 1233 |
#endif |
| 1234 |
|
| 1235 |
if (expect_false (block < 0.)) block = 0.; |
| 1236 |
} |
| 1237 |
|
| 1238 |
method_poll (EV_A_ block); |
| 1239 |
|
| 1240 |
/* update ev_rt_now, do magic */ |
| 1241 |
time_update (EV_A); |
| 1242 |
|
| 1243 |
/* queue pending timers and reschedule them */ |
| 1244 |
timers_reify (EV_A); /* relative timers called last */ |
| 1245 |
#if EV_PERIODICS |
| 1246 |
periodics_reify (EV_A); /* absolute timers called first */ |
| 1247 |
#endif |
| 1248 |
|
| 1249 |
/* queue idle watchers unless io or timers are pending */ |
| 1250 |
if (idlecnt && !any_pending (EV_A)) |
| 1251 |
queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE); |
| 1252 |
|
| 1253 |
/* queue check watchers, to be executed first */ |
| 1254 |
if (expect_false (checkcnt)) |
| 1255 |
queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); |
| 1256 |
|
| 1257 |
call_pending (EV_A); |
| 1258 |
|
| 1259 |
if (expect_false (loop_done)) |
| 1260 |
break; |
| 1261 |
} |
| 1262 |
|
| 1263 |
if (loop_done != 2) |
| 1264 |
loop_done = 0; |
| 1265 |
} |
| 1266 |
|
| 1267 |
void |
| 1268 |
ev_unloop (EV_P_ int how) |
| 1269 |
{ |
| 1270 |
loop_done = how; |
| 1271 |
} |
| 1272 |
|
| 1273 |
/*****************************************************************************/ |
| 1274 |
|
| 1275 |
inline void |
| 1276 |
wlist_add (WL *head, WL elem) |
| 1277 |
{ |
| 1278 |
elem->next = *head; |
| 1279 |
*head = elem; |
| 1280 |
} |
| 1281 |
|
| 1282 |
inline void |
| 1283 |
wlist_del (WL *head, WL elem) |
| 1284 |
{ |
| 1285 |
while (*head) |
| 1286 |
{ |
| 1287 |
if (*head == elem) |
| 1288 |
{ |
| 1289 |
*head = elem->next; |
| 1290 |
return; |
| 1291 |
} |
| 1292 |
|
| 1293 |
head = &(*head)->next; |
| 1294 |
} |
| 1295 |
} |
| 1296 |
|
| 1297 |
inline void |
| 1298 |
ev_clear_pending (EV_P_ W w) |
| 1299 |
{ |
| 1300 |
if (w->pending) |
| 1301 |
{ |
| 1302 |
pendings [ABSPRI (w)][w->pending - 1].w = 0; |
| 1303 |
w->pending = 0; |
| 1304 |
} |
| 1305 |
} |
| 1306 |
|
| 1307 |
inline void |
| 1308 |
ev_start (EV_P_ W w, int active) |
| 1309 |
{ |
| 1310 |
if (w->priority < EV_MINPRI) w->priority = EV_MINPRI; |
| 1311 |
if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI; |
| 1312 |
|
| 1313 |
w->active = active; |
| 1314 |
ev_ref (EV_A); |
| 1315 |
} |
| 1316 |
|
| 1317 |
inline void |
| 1318 |
ev_stop (EV_P_ W w) |
| 1319 |
{ |
| 1320 |
ev_unref (EV_A); |
| 1321 |
w->active = 0; |
| 1322 |
} |
| 1323 |
|
| 1324 |
/*****************************************************************************/ |
| 1325 |
|
| 1326 |
void |
| 1327 |
ev_io_start (EV_P_ struct ev_io *w) |
| 1328 |
{ |
| 1329 |
int fd = w->fd; |
| 1330 |
|
| 1331 |
if (expect_false (ev_is_active (w))) |
| 1332 |
return; |
| 1333 |
|
| 1334 |
assert (("ev_io_start called with negative fd", fd >= 0)); |
| 1335 |
|
| 1336 |
ev_start (EV_A_ (W)w, 1); |
| 1337 |
array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); |
| 1338 |
wlist_add ((WL *)&anfds[fd].head, (WL)w); |
| 1339 |
|
| 1340 |
fd_change (EV_A_ fd); |
| 1341 |
} |
| 1342 |
|
| 1343 |
void |
| 1344 |
ev_io_stop (EV_P_ struct ev_io *w) |
| 1345 |
{ |
| 1346 |
ev_clear_pending (EV_A_ (W)w); |
| 1347 |
if (expect_false (!ev_is_active (w))) |
| 1348 |
return; |
| 1349 |
|
| 1350 |
assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); |
| 1351 |
|
| 1352 |
wlist_del ((WL *)&anfds[w->fd].head, (WL)w); |
| 1353 |
ev_stop (EV_A_ (W)w); |
| 1354 |
|
| 1355 |
fd_change (EV_A_ w->fd); |
| 1356 |
} |
| 1357 |
|
| 1358 |
void |
| 1359 |
ev_timer_start (EV_P_ struct ev_timer *w) |
| 1360 |
{ |
| 1361 |
if (expect_false (ev_is_active (w))) |
| 1362 |
return; |
| 1363 |
|
| 1364 |
((WT)w)->at += mn_now; |
| 1365 |
|
| 1366 |
assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); |
| 1367 |
|
| 1368 |
ev_start (EV_A_ (W)w, ++timercnt); |
| 1369 |
array_needsize (struct ev_timer *, timers, timermax, timercnt, EMPTY2); |
| 1370 |
timers [timercnt - 1] = w; |
| 1371 |
upheap ((WT *)timers, timercnt - 1); |
| 1372 |
|
| 1373 |
assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); |
| 1374 |
} |
| 1375 |
|
| 1376 |
void |
| 1377 |
ev_timer_stop (EV_P_ struct ev_timer *w) |
| 1378 |
{ |
| 1379 |
ev_clear_pending (EV_A_ (W)w); |
| 1380 |
if (expect_false (!ev_is_active (w))) |
| 1381 |
return; |
| 1382 |
|
| 1383 |
assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); |
| 1384 |
|
| 1385 |
if (expect_true (((W)w)->active < timercnt--)) |
| 1386 |
{ |
| 1387 |
timers [((W)w)->active - 1] = timers [timercnt]; |
| 1388 |
adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1); |
| 1389 |
} |
| 1390 |
|
| 1391 |
((WT)w)->at -= mn_now; |
| 1392 |
|
| 1393 |
ev_stop (EV_A_ (W)w); |
| 1394 |
} |
| 1395 |
|
| 1396 |
void |
| 1397 |
ev_timer_again (EV_P_ struct ev_timer *w) |
| 1398 |
{ |
| 1399 |
if (ev_is_active (w)) |
| 1400 |
{ |
| 1401 |
if (w->repeat) |
| 1402 |
{ |
| 1403 |
((WT)w)->at = mn_now + w->repeat; |
| 1404 |
adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1); |
| 1405 |
} |
| 1406 |
else |
| 1407 |
ev_timer_stop (EV_A_ w); |
| 1408 |
} |
| 1409 |
else if (w->repeat) |
| 1410 |
{ |
| 1411 |
w->at = w->repeat; |
| 1412 |
ev_timer_start (EV_A_ w); |
| 1413 |
} |
| 1414 |
} |
| 1415 |
|
| 1416 |
#if EV_PERIODICS |
| 1417 |
void |
| 1418 |
ev_periodic_start (EV_P_ struct ev_periodic *w) |
| 1419 |
{ |
| 1420 |
if (expect_false (ev_is_active (w))) |
| 1421 |
return; |
| 1422 |
|
| 1423 |
if (w->reschedule_cb) |
| 1424 |
((WT)w)->at = w->reschedule_cb (w, ev_rt_now); |
| 1425 |
else if (w->interval) |
| 1426 |
{ |
| 1427 |
assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); |
| 1428 |
/* this formula differs from the one in periodic_reify because we do not always round up */ |
| 1429 |
((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval; |
| 1430 |
} |
| 1431 |
|
| 1432 |
ev_start (EV_A_ (W)w, ++periodiccnt); |
| 1433 |
array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2); |
| 1434 |
periodics [periodiccnt - 1] = w; |
| 1435 |
upheap ((WT *)periodics, periodiccnt - 1); |
| 1436 |
|
| 1437 |
assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); |
| 1438 |
} |
| 1439 |
|
| 1440 |
void |
| 1441 |
ev_periodic_stop (EV_P_ struct ev_periodic *w) |
| 1442 |
{ |
| 1443 |
ev_clear_pending (EV_A_ (W)w); |
| 1444 |
if (expect_false (!ev_is_active (w))) |
| 1445 |
return; |
| 1446 |
|
| 1447 |
assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); |
| 1448 |
|
| 1449 |
if (expect_true (((W)w)->active < periodiccnt--)) |
| 1450 |
{ |
| 1451 |
periodics [((W)w)->active - 1] = periodics [periodiccnt]; |
| 1452 |
adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1); |
| 1453 |
} |
| 1454 |
|
| 1455 |
ev_stop (EV_A_ (W)w); |
| 1456 |
} |
| 1457 |
|
| 1458 |
void |
| 1459 |
ev_periodic_again (EV_P_ struct ev_periodic *w) |
| 1460 |
{ |
| 1461 |
/* TODO: use adjustheap and recalculation */ |
| 1462 |
ev_periodic_stop (EV_A_ w); |
| 1463 |
ev_periodic_start (EV_A_ w); |
| 1464 |
} |
| 1465 |
#endif |
| 1466 |
|
| 1467 |
void |
| 1468 |
ev_idle_start (EV_P_ struct ev_idle *w) |
| 1469 |
{ |
| 1470 |
if (expect_false (ev_is_active (w))) |
| 1471 |
return; |
| 1472 |
|
| 1473 |
ev_start (EV_A_ (W)w, ++idlecnt); |
| 1474 |
array_needsize (struct ev_idle *, idles, idlemax, idlecnt, EMPTY2); |
| 1475 |
idles [idlecnt - 1] = w; |
| 1476 |
} |
| 1477 |
|
| 1478 |
void |
| 1479 |
ev_idle_stop (EV_P_ struct ev_idle *w) |
| 1480 |
{ |
| 1481 |
ev_clear_pending (EV_A_ (W)w); |
| 1482 |
if (expect_false (!ev_is_active (w))) |
| 1483 |
return; |
| 1484 |
|
| 1485 |
idles [((W)w)->active - 1] = idles [--idlecnt]; |
| 1486 |
ev_stop (EV_A_ (W)w); |
| 1487 |
} |
| 1488 |
|
| 1489 |
void |
| 1490 |
ev_prepare_start (EV_P_ struct ev_prepare *w) |
| 1491 |
{ |
| 1492 |
if (expect_false (ev_is_active (w))) |
| 1493 |
return; |
| 1494 |
|
| 1495 |
ev_start (EV_A_ (W)w, ++preparecnt); |
| 1496 |
array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); |
| 1497 |
prepares [preparecnt - 1] = w; |
| 1498 |
} |
| 1499 |
|
| 1500 |
void |
| 1501 |
ev_prepare_stop (EV_P_ struct ev_prepare *w) |
| 1502 |
{ |
| 1503 |
ev_clear_pending (EV_A_ (W)w); |
| 1504 |
if (expect_false (!ev_is_active (w))) |
| 1505 |
return; |
| 1506 |
|
| 1507 |
prepares [((W)w)->active - 1] = prepares [--preparecnt]; |
| 1508 |
ev_stop (EV_A_ (W)w); |
| 1509 |
} |
| 1510 |
|
| 1511 |
void |
| 1512 |
ev_check_start (EV_P_ struct ev_check *w) |
| 1513 |
{ |
| 1514 |
if (expect_false (ev_is_active (w))) |
| 1515 |
return; |
| 1516 |
|
| 1517 |
ev_start (EV_A_ (W)w, ++checkcnt); |
| 1518 |
array_needsize (struct ev_check *, checks, checkmax, checkcnt, EMPTY2); |
| 1519 |
checks [checkcnt - 1] = w; |
| 1520 |
} |
| 1521 |
|
| 1522 |
void |
| 1523 |
ev_check_stop (EV_P_ struct ev_check *w) |
| 1524 |
{ |
| 1525 |
ev_clear_pending (EV_A_ (W)w); |
| 1526 |
if (expect_false (!ev_is_active (w))) |
| 1527 |
return; |
| 1528 |
|
| 1529 |
checks [((W)w)->active - 1] = checks [--checkcnt]; |
| 1530 |
ev_stop (EV_A_ (W)w); |
| 1531 |
} |
| 1532 |
|
| 1533 |
#ifndef SA_RESTART |
| 1534 |
# define SA_RESTART 0 |
| 1535 |
#endif |
| 1536 |
|
| 1537 |
void |
| 1538 |
ev_signal_start (EV_P_ struct ev_signal *w) |
| 1539 |
{ |
| 1540 |
#if EV_MULTIPLICITY |
| 1541 |
assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr)); |
| 1542 |
#endif |
| 1543 |
if (expect_false (ev_is_active (w))) |
| 1544 |
return; |
| 1545 |
|
| 1546 |
assert (("ev_signal_start called with illegal signal number", w->signum > 0)); |
| 1547 |
|
| 1548 |
ev_start (EV_A_ (W)w, 1); |
| 1549 |
array_needsize (ANSIG, signals, signalmax, w->signum, signals_init); |
| 1550 |
wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); |
| 1551 |
|
| 1552 |
if (!((WL)w)->next) |
| 1553 |
{ |
| 1554 |
#if _WIN32 |
| 1555 |
signal (w->signum, sighandler); |
| 1556 |
#else |
| 1557 |
struct sigaction sa; |
| 1558 |
sa.sa_handler = sighandler; |
| 1559 |
sigfillset (&sa.sa_mask); |
| 1560 |
sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ |
| 1561 |
sigaction (w->signum, &sa, 0); |
| 1562 |
#endif |
| 1563 |
} |
| 1564 |
} |
| 1565 |
|
| 1566 |
void |
| 1567 |
ev_signal_stop (EV_P_ struct ev_signal *w) |
| 1568 |
{ |
| 1569 |
ev_clear_pending (EV_A_ (W)w); |
| 1570 |
if (expect_false (!ev_is_active (w))) |
| 1571 |
return; |
| 1572 |
|
| 1573 |
wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); |
| 1574 |
ev_stop (EV_A_ (W)w); |
| 1575 |
|
| 1576 |
if (!signals [w->signum - 1].head) |
| 1577 |
signal (w->signum, SIG_DFL); |
| 1578 |
} |
| 1579 |
|
| 1580 |
void |
| 1581 |
ev_child_start (EV_P_ struct ev_child *w) |
| 1582 |
{ |
| 1583 |
#if EV_MULTIPLICITY |
| 1584 |
assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); |
| 1585 |
#endif |
| 1586 |
if (expect_false (ev_is_active (w))) |
| 1587 |
return; |
| 1588 |
|
| 1589 |
ev_start (EV_A_ (W)w, 1); |
| 1590 |
wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); |
| 1591 |
} |
| 1592 |
|
| 1593 |
void |
| 1594 |
ev_child_stop (EV_P_ struct ev_child *w) |
| 1595 |
{ |
| 1596 |
ev_clear_pending (EV_A_ (W)w); |
| 1597 |
if (expect_false (!ev_is_active (w))) |
| 1598 |
return; |
| 1599 |
|
| 1600 |
wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); |
| 1601 |
ev_stop (EV_A_ (W)w); |
| 1602 |
} |
| 1603 |
|
| 1604 |
/*****************************************************************************/ |
| 1605 |
|
| 1606 |
struct ev_once |
| 1607 |
{ |
| 1608 |
struct ev_io io; |
| 1609 |
struct ev_timer to; |
| 1610 |
void (*cb)(int revents, void *arg); |
| 1611 |
void *arg; |
| 1612 |
}; |
| 1613 |
|
| 1614 |
static void |
| 1615 |
once_cb (EV_P_ struct ev_once *once, int revents) |
| 1616 |
{ |
| 1617 |
void (*cb)(int revents, void *arg) = once->cb; |
| 1618 |
void *arg = once->arg; |
| 1619 |
|
| 1620 |
ev_io_stop (EV_A_ &once->io); |
| 1621 |
ev_timer_stop (EV_A_ &once->to); |
| 1622 |
ev_free (once); |
| 1623 |
|
| 1624 |
cb (revents, arg); |
| 1625 |
} |
| 1626 |
|
| 1627 |
static void |
| 1628 |
once_cb_io (EV_P_ struct ev_io *w, int revents) |
| 1629 |
{ |
| 1630 |
once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); |
| 1631 |
} |
| 1632 |
|
| 1633 |
static void |
| 1634 |
once_cb_to (EV_P_ struct ev_timer *w, int revents) |
| 1635 |
{ |
| 1636 |
once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); |
| 1637 |
} |
| 1638 |
|
| 1639 |
void |
| 1640 |
ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) |
| 1641 |
{ |
| 1642 |
struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); |
| 1643 |
|
| 1644 |
if (expect_false (!once)) |
| 1645 |
{ |
| 1646 |
cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); |
| 1647 |
return; |
| 1648 |
} |
| 1649 |
|
| 1650 |
once->cb = cb; |
| 1651 |
once->arg = arg; |
| 1652 |
|
| 1653 |
ev_init (&once->io, once_cb_io); |
| 1654 |
if (fd >= 0) |
| 1655 |
{ |
| 1656 |
ev_io_set (&once->io, fd, events); |
| 1657 |
ev_io_start (EV_A_ &once->io); |
| 1658 |
} |
| 1659 |
|
| 1660 |
ev_init (&once->to, once_cb_to); |
| 1661 |
if (timeout >= 0.) |
| 1662 |
{ |
| 1663 |
ev_timer_set (&once->to, timeout, 0.); |
| 1664 |
ev_timer_start (EV_A_ &once->to); |
| 1665 |
} |
| 1666 |
} |
| 1667 |
|
| 1668 |
#ifdef __cplusplus |
| 1669 |
} |
| 1670 |
#endif |
| 1671 |
|
