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Comparing libev/ev.c (file contents):
Revision 1.72 by root, Tue Nov 6 16:09:37 2007 UTC vs.
Revision 1.271 by root, Mon Nov 3 12:13:15 2008 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008 Marc Alexander Lehmann <libev@schmorp.de>
5 * All rights reserved. 5 * All rights reserved.
6 * 6 *
7 * Redistribution and use in source and binary forms, with or without 7 * Redistribution and use in source and binary forms, with or without modifica-
8 * modification, are permitted provided that the following conditions are 8 * tion, are permitted provided that the following conditions are met:
9 * met: 9 *
10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
23 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
25 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
26 * OF THE POSSIBILITY OF SUCH DAMAGE.
10 * 27 *
11 * * Redistributions of source code must retain the above copyright 28 * Alternatively, the contents of this file may be used under the terms of
12 * notice, this list of conditions and the following disclaimer. 29 * the GNU General Public License ("GPL") version 2 or any later version,
13 * 30 * in which case the provisions of the GPL are applicable instead of
14 * * Redistributions in binary form must reproduce the above 31 * the above. If you wish to allow the use of your version of this file
15 * copyright notice, this list of conditions and the following 32 * only under the terms of the GPL and not to allow others to use your
16 * disclaimer in the documentation and/or other materials provided 33 * version of this file under the BSD license, indicate your decision
17 * with the distribution. 34 * by deleting the provisions above and replace them with the notice
18 * 35 * and other provisions required by the GPL. If you do not delete the
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 36 * provisions above, a recipient may use your version of this file under
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 37 * either the BSD or the GPL.
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 */ 38 */
39
40#ifdef __cplusplus
41extern "C" {
42#endif
43
44/* this big block deduces configuration from config.h */
31#ifndef EV_STANDALONE 45#ifndef EV_STANDALONE
46# ifdef EV_CONFIG_H
47# include EV_CONFIG_H
48# else
32# include "config.h" 49# include "config.h"
50# endif
33 51
34# if HAVE_CLOCK_GETTIME 52# if HAVE_CLOCK_GETTIME
53# ifndef EV_USE_MONOTONIC
35# define EV_USE_MONOTONIC 1 54# define EV_USE_MONOTONIC 1
55# endif
56# ifndef EV_USE_REALTIME
36# define EV_USE_REALTIME 1 57# define EV_USE_REALTIME 1
58# endif
59# else
60# ifndef EV_USE_MONOTONIC
61# define EV_USE_MONOTONIC 0
62# endif
63# ifndef EV_USE_REALTIME
64# define EV_USE_REALTIME 0
65# endif
37# endif 66# endif
38 67
39# if HAVE_SELECT && HAVE_SYS_SELECT_H 68# ifndef EV_USE_NANOSLEEP
69# if HAVE_NANOSLEEP
40# define EV_USE_SELECT 1 70# define EV_USE_NANOSLEEP 1
71# else
72# define EV_USE_NANOSLEEP 0
73# endif
41# endif 74# endif
42 75
43# if HAVE_POLL && HAVE_POLL_H 76# ifndef EV_USE_SELECT
77# if HAVE_SELECT && HAVE_SYS_SELECT_H
44# define EV_USE_POLL 1 78# define EV_USE_SELECT 1
79# else
80# define EV_USE_SELECT 0
81# endif
45# endif 82# endif
46 83
47# if HAVE_EPOLL && HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H 84# ifndef EV_USE_POLL
85# if HAVE_POLL && HAVE_POLL_H
48# define EV_USE_EPOLL 1 86# define EV_USE_POLL 1
87# else
88# define EV_USE_POLL 0
89# endif
49# endif 90# endif
50 91
51# if HAVE_KQUEUE && HAVE_WORKING_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H 92# ifndef EV_USE_EPOLL
93# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
52# define EV_USE_KQUEUE 1 94# define EV_USE_EPOLL 1
95# else
96# define EV_USE_EPOLL 0
97# endif
53# endif 98# endif
99
100# ifndef EV_USE_KQUEUE
101# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
102# define EV_USE_KQUEUE 1
103# else
104# define EV_USE_KQUEUE 0
105# endif
106# endif
107
108# ifndef EV_USE_PORT
109# if HAVE_PORT_H && HAVE_PORT_CREATE
110# define EV_USE_PORT 1
111# else
112# define EV_USE_PORT 0
113# endif
114# endif
54 115
116# ifndef EV_USE_INOTIFY
117# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
118# define EV_USE_INOTIFY 1
119# else
120# define EV_USE_INOTIFY 0
121# endif
122# endif
123
124# ifndef EV_USE_EVENTFD
125# if HAVE_EVENTFD
126# define EV_USE_EVENTFD 1
127# else
128# define EV_USE_EVENTFD 0
129# endif
130# endif
131
55#endif 132#endif
56 133
57#include <math.h> 134#include <math.h>
58#include <stdlib.h> 135#include <stdlib.h>
59#include <fcntl.h> 136#include <fcntl.h>
… …
66#include <sys/types.h> 143#include <sys/types.h>
67#include <time.h> 144#include <time.h>
68 145
69#include <signal.h> 146#include <signal.h>
70 147
148#ifdef EV_H
149# include EV_H
150#else
151# include "ev.h"
152#endif
153
71#ifndef WIN32 154#ifndef _WIN32
72# include <unistd.h>
73# include <sys/time.h> 155# include <sys/time.h>
74# include <sys/wait.h> 156# include <sys/wait.h>
157# include <unistd.h>
158#else
159# include <io.h>
160# define WIN32_LEAN_AND_MEAN
161# include <windows.h>
162# ifndef EV_SELECT_IS_WINSOCKET
163# define EV_SELECT_IS_WINSOCKET 1
75#endif 164# endif
76/**/ 165#endif
166
167/* this block tries to deduce configuration from header-defined symbols and defaults */
77 168
78#ifndef EV_USE_MONOTONIC 169#ifndef EV_USE_MONOTONIC
170# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
79# define EV_USE_MONOTONIC 1 171# define EV_USE_MONOTONIC 1
172# else
173# define EV_USE_MONOTONIC 0
174# endif
175#endif
176
177#ifndef EV_USE_REALTIME
178# define EV_USE_REALTIME 0
179#endif
180
181#ifndef EV_USE_NANOSLEEP
182# if _POSIX_C_SOURCE >= 199309L
183# define EV_USE_NANOSLEEP 1
184# else
185# define EV_USE_NANOSLEEP 0
186# endif
80#endif 187#endif
81 188
82#ifndef EV_USE_SELECT 189#ifndef EV_USE_SELECT
83# define EV_USE_SELECT 1 190# define EV_USE_SELECT 1
84#endif 191#endif
85 192
86#ifndef EV_USE_POLL 193#ifndef EV_USE_POLL
87# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */ 194# ifdef _WIN32
195# define EV_USE_POLL 0
196# else
197# define EV_USE_POLL 1
198# endif
88#endif 199#endif
89 200
90#ifndef EV_USE_EPOLL 201#ifndef EV_USE_EPOLL
202# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
203# define EV_USE_EPOLL 1
204# else
91# define EV_USE_EPOLL 0 205# define EV_USE_EPOLL 0
206# endif
92#endif 207#endif
93 208
94#ifndef EV_USE_KQUEUE 209#ifndef EV_USE_KQUEUE
95# define EV_USE_KQUEUE 0 210# define EV_USE_KQUEUE 0
96#endif 211#endif
97 212
213#ifndef EV_USE_PORT
214# define EV_USE_PORT 0
215#endif
216
98#ifndef EV_USE_WIN32 217#ifndef EV_USE_INOTIFY
99# ifdef WIN32 218# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
100# define EV_USE_WIN32 0 /* it does not exist, use select */
101# undef EV_USE_SELECT
102# define EV_USE_SELECT 1 219# define EV_USE_INOTIFY 1
103# else 220# else
104# define EV_USE_WIN32 0 221# define EV_USE_INOTIFY 0
105# endif 222# endif
106#endif 223#endif
107 224
108#ifndef EV_USE_REALTIME 225#ifndef EV_PID_HASHSIZE
109# define EV_USE_REALTIME 1 226# if EV_MINIMAL
227# define EV_PID_HASHSIZE 1
228# else
229# define EV_PID_HASHSIZE 16
110#endif 230# endif
231#endif
111 232
112/**/ 233#ifndef EV_INOTIFY_HASHSIZE
234# if EV_MINIMAL
235# define EV_INOTIFY_HASHSIZE 1
236# else
237# define EV_INOTIFY_HASHSIZE 16
238# endif
239#endif
240
241#ifndef EV_USE_EVENTFD
242# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
243# define EV_USE_EVENTFD 1
244# else
245# define EV_USE_EVENTFD 0
246# endif
247#endif
248
249#if 0 /* debugging */
250# define EV_VERIFY 3
251# define EV_USE_4HEAP 1
252# define EV_HEAP_CACHE_AT 1
253#endif
254
255#ifndef EV_VERIFY
256# define EV_VERIFY !EV_MINIMAL
257#endif
258
259#ifndef EV_USE_4HEAP
260# define EV_USE_4HEAP !EV_MINIMAL
261#endif
262
263#ifndef EV_HEAP_CACHE_AT
264# define EV_HEAP_CACHE_AT !EV_MINIMAL
265#endif
266
267/* this block fixes any misconfiguration where we know we run into trouble otherwise */
113 268
114#ifndef CLOCK_MONOTONIC 269#ifndef CLOCK_MONOTONIC
115# undef EV_USE_MONOTONIC 270# undef EV_USE_MONOTONIC
116# define EV_USE_MONOTONIC 0 271# define EV_USE_MONOTONIC 0
117#endif 272#endif
… …
119#ifndef CLOCK_REALTIME 274#ifndef CLOCK_REALTIME
120# undef EV_USE_REALTIME 275# undef EV_USE_REALTIME
121# define EV_USE_REALTIME 0 276# define EV_USE_REALTIME 0
122#endif 277#endif
123 278
279#if !EV_STAT_ENABLE
280# undef EV_USE_INOTIFY
281# define EV_USE_INOTIFY 0
282#endif
283
284#if !EV_USE_NANOSLEEP
285# ifndef _WIN32
286# include <sys/select.h>
287# endif
288#endif
289
290#if EV_USE_INOTIFY
291# include <sys/utsname.h>
292# include <sys/statfs.h>
293# include <sys/inotify.h>
294/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
295# ifndef IN_DONT_FOLLOW
296# undef EV_USE_INOTIFY
297# define EV_USE_INOTIFY 0
298# endif
299#endif
300
301#if EV_SELECT_IS_WINSOCKET
302# include <winsock.h>
303#endif
304
305#if EV_USE_EVENTFD
306/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
307# include <stdint.h>
308# ifdef __cplusplus
309extern "C" {
310# endif
311int eventfd (unsigned int initval, int flags);
312# ifdef __cplusplus
313}
314# endif
315#endif
316
124/**/ 317/**/
125 318
319#if EV_VERIFY >= 3
320# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
321#else
322# define EV_FREQUENT_CHECK do { } while (0)
323#endif
324
325/*
326 * This is used to avoid floating point rounding problems.
327 * It is added to ev_rt_now when scheduling periodics
328 * to ensure progress, time-wise, even when rounding
329 * errors are against us.
330 * This value is good at least till the year 4000.
331 * Better solutions welcome.
332 */
333#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
334
126#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 335#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
127#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */ 336#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
128#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
129/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */ 337/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
130 338
131#include "ev.h"
132
133#if __GNUC__ >= 3 339#if __GNUC__ >= 4
134# define expect(expr,value) __builtin_expect ((expr),(value)) 340# define expect(expr,value) __builtin_expect ((expr),(value))
135# define inline inline 341# define noinline __attribute__ ((noinline))
136#else 342#else
137# define expect(expr,value) (expr) 343# define expect(expr,value) (expr)
138# define inline static 344# define noinline
345# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
346# define inline
347# endif
139#endif 348#endif
140 349
141#define expect_false(expr) expect ((expr) != 0, 0) 350#define expect_false(expr) expect ((expr) != 0, 0)
142#define expect_true(expr) expect ((expr) != 0, 1) 351#define expect_true(expr) expect ((expr) != 0, 1)
352#define inline_size static inline
353
354#if EV_MINIMAL
355# define inline_speed static noinline
356#else
357# define inline_speed static inline
358#endif
143 359
144#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 360#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
145#define ABSPRI(w) ((w)->priority - EV_MINPRI) 361#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
146 362
363#define EMPTY /* required for microsofts broken pseudo-c compiler */
364#define EMPTY2(a,b) /* used to suppress some warnings */
365
147typedef struct ev_watcher *W; 366typedef ev_watcher *W;
148typedef struct ev_watcher_list *WL; 367typedef ev_watcher_list *WL;
149typedef struct ev_watcher_time *WT; 368typedef ev_watcher_time *WT;
150 369
370#define ev_active(w) ((W)(w))->active
371#define ev_at(w) ((WT)(w))->at
372
373#if EV_USE_MONOTONIC
374/* sig_atomic_t is used to avoid per-thread variables or locking but still */
375/* giving it a reasonably high chance of working on typical architetcures */
151static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 376static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
377#endif
152 378
153#if WIN32 379#ifdef _WIN32
154/* note: the comment below could not be substantiated, but what would I care */ 380# include "ev_win32.c"
155/* MSDN says this is required to handle SIGFPE */
156volatile double SIGFPE_REQ = 0.0f;
157
158static int
159ev_socketpair_tcp (int filedes [2])
160{
161 struct sockaddr_in addr = { 0 };
162 int addr_size = sizeof (addr);
163 SOCKET listener;
164 SOCKET sock [2] = { -1, -1 };
165
166 if ((listener = socket (AF_INET, SOCK_STREAM, 0)) == INVALID_SOCKET)
167 return -1;
168
169 addr.sin_family = AF_INET;
170 addr.sin_addr.s_addr = htonl (INADDR_LOOPBACK);
171 addr.sin_port = 0;
172
173 if (bind (listener, (struct sockaddr *)&addr, addr_size))
174 goto fail;
175
176 if (getsockname(listener, (struct sockaddr *)&addr, &addr_size))
177 goto fail;
178
179 if (listen (listener, 1))
180 goto fail;
181
182 if ((sock [0] = socket (AF_INET, SOCK_STREAM, 0)) == INVALID_SOCKET)
183 goto fail;
184
185 if (connect (sock[0], (struct sockaddr *)&addr, addr_size))
186 goto fail;
187
188 if ((sock[1] = accept (listener, 0, 0)) < 0)
189 goto fail;
190
191 closesocket (listener);
192
193 filedes [0] = sock [0];
194 filedes [1] = sock [1];
195
196 return 0;
197
198fail:
199 closesocket (listener);
200
201 if (sock [0] != INVALID_SOCKET) closesocket (sock [0]);
202 if (sock [1] != INVALID_SOCKET) closesocket (sock [1]);
203
204 return -1;
205}
206
207# define ev_pipe(filedes) ev_socketpair_tcp (filedes)
208#else
209# define ev_pipe(filedes) pipe (filedes)
210#endif 381#endif
211 382
212/*****************************************************************************/ 383/*****************************************************************************/
213 384
214static void (*syserr_cb)(const char *msg); 385static void (*syserr_cb)(const char *msg);
215 386
387void
216void ev_set_syserr_cb (void (*cb)(const char *msg)) 388ev_set_syserr_cb (void (*cb)(const char *msg))
217{ 389{
218 syserr_cb = cb; 390 syserr_cb = cb;
219} 391}
220 392
221static void 393static void noinline
222syserr (const char *msg) 394ev_syserr (const char *msg)
223{ 395{
224 if (!msg) 396 if (!msg)
225 msg = "(libev) system error"; 397 msg = "(libev) system error";
226 398
227 if (syserr_cb) 399 if (syserr_cb)
… …
231 perror (msg); 403 perror (msg);
232 abort (); 404 abort ();
233 } 405 }
234} 406}
235 407
408static void *
409ev_realloc_emul (void *ptr, long size)
410{
411 /* some systems, notably openbsd and darwin, fail to properly
412 * implement realloc (x, 0) (as required by both ansi c-98 and
413 * the single unix specification, so work around them here.
414 */
415
416 if (size)
417 return realloc (ptr, size);
418
419 free (ptr);
420 return 0;
421}
422
236static void *(*alloc)(void *ptr, long size); 423static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
237 424
425void
238void ev_set_allocator (void *(*cb)(void *ptr, long size)) 426ev_set_allocator (void *(*cb)(void *ptr, long size))
239{ 427{
240 alloc = cb; 428 alloc = cb;
241} 429}
242 430
243static void * 431inline_speed void *
244ev_realloc (void *ptr, long size) 432ev_realloc (void *ptr, long size)
245{ 433{
246 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 434 ptr = alloc (ptr, size);
247 435
248 if (!ptr && size) 436 if (!ptr && size)
249 { 437 {
250 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 438 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
251 abort (); 439 abort ();
… …
262typedef struct 450typedef struct
263{ 451{
264 WL head; 452 WL head;
265 unsigned char events; 453 unsigned char events;
266 unsigned char reify; 454 unsigned char reify;
455 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
456 unsigned char unused;
457#if EV_USE_EPOLL
458 unsigned int egen; /* generation counter to counter epoll bugs */
459#endif
460#if EV_SELECT_IS_WINSOCKET
461 SOCKET handle;
462#endif
267} ANFD; 463} ANFD;
268 464
269typedef struct 465typedef struct
270{ 466{
271 W w; 467 W w;
272 int events; 468 int events;
273} ANPENDING; 469} ANPENDING;
274 470
471#if EV_USE_INOTIFY
472/* hash table entry per inotify-id */
473typedef struct
474{
475 WL head;
476} ANFS;
477#endif
478
479/* Heap Entry */
480#if EV_HEAP_CACHE_AT
481 typedef struct {
482 ev_tstamp at;
483 WT w;
484 } ANHE;
485
486 #define ANHE_w(he) (he).w /* access watcher, read-write */
487 #define ANHE_at(he) (he).at /* access cached at, read-only */
488 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
489#else
490 typedef WT ANHE;
491
492 #define ANHE_w(he) (he)
493 #define ANHE_at(he) (he)->at
494 #define ANHE_at_cache(he)
495#endif
496
275#if EV_MULTIPLICITY 497#if EV_MULTIPLICITY
276 498
277struct ev_loop 499 struct ev_loop
278{ 500 {
501 ev_tstamp ev_rt_now;
502 #define ev_rt_now ((loop)->ev_rt_now)
279# define VAR(name,decl) decl; 503 #define VAR(name,decl) decl;
280# include "ev_vars.h" 504 #include "ev_vars.h"
281};
282# undef VAR 505 #undef VAR
506 };
283# include "ev_wrap.h" 507 #include "ev_wrap.h"
508
509 static struct ev_loop default_loop_struct;
510 struct ev_loop *ev_default_loop_ptr;
284 511
285#else 512#else
286 513
514 ev_tstamp ev_rt_now;
287# define VAR(name,decl) static decl; 515 #define VAR(name,decl) static decl;
288# include "ev_vars.h" 516 #include "ev_vars.h"
289# undef VAR 517 #undef VAR
518
519 static int ev_default_loop_ptr;
290 520
291#endif 521#endif
292 522
293/*****************************************************************************/ 523/*****************************************************************************/
294 524
295inline ev_tstamp 525ev_tstamp
296ev_time (void) 526ev_time (void)
297{ 527{
298#if EV_USE_REALTIME 528#if EV_USE_REALTIME
299 struct timespec ts; 529 struct timespec ts;
300 clock_gettime (CLOCK_REALTIME, &ts); 530 clock_gettime (CLOCK_REALTIME, &ts);
… …
304 gettimeofday (&tv, 0); 534 gettimeofday (&tv, 0);
305 return tv.tv_sec + tv.tv_usec * 1e-6; 535 return tv.tv_sec + tv.tv_usec * 1e-6;
306#endif 536#endif
307} 537}
308 538
309inline ev_tstamp 539ev_tstamp inline_size
310get_clock (void) 540get_clock (void)
311{ 541{
312#if EV_USE_MONOTONIC 542#if EV_USE_MONOTONIC
313 if (expect_true (have_monotonic)) 543 if (expect_true (have_monotonic))
314 { 544 {
… …
319#endif 549#endif
320 550
321 return ev_time (); 551 return ev_time ();
322} 552}
323 553
554#if EV_MULTIPLICITY
324ev_tstamp 555ev_tstamp
325ev_now (EV_P) 556ev_now (EV_P)
326{ 557{
327 return rt_now; 558 return ev_rt_now;
328} 559}
560#endif
329 561
330#define array_roundsize(base,n) ((n) | 4 & ~3) 562void
563ev_sleep (ev_tstamp delay)
564{
565 if (delay > 0.)
566 {
567#if EV_USE_NANOSLEEP
568 struct timespec ts;
331 569
570 ts.tv_sec = (time_t)delay;
571 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
572
573 nanosleep (&ts, 0);
574#elif defined(_WIN32)
575 Sleep ((unsigned long)(delay * 1e3));
576#else
577 struct timeval tv;
578
579 tv.tv_sec = (time_t)delay;
580 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
581
582 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
583 /* somehting nto guaranteed by newer posix versions, but guaranteed */
584 /* by older ones */
585 select (0, 0, 0, 0, &tv);
586#endif
587 }
588}
589
590/*****************************************************************************/
591
592#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
593
594int inline_size
595array_nextsize (int elem, int cur, int cnt)
596{
597 int ncur = cur + 1;
598
599 do
600 ncur <<= 1;
601 while (cnt > ncur);
602
603 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
604 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
605 {
606 ncur *= elem;
607 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
608 ncur = ncur - sizeof (void *) * 4;
609 ncur /= elem;
610 }
611
612 return ncur;
613}
614
615static noinline void *
616array_realloc (int elem, void *base, int *cur, int cnt)
617{
618 *cur = array_nextsize (elem, *cur, cnt);
619 return ev_realloc (base, elem * *cur);
620}
621
622#define array_init_zero(base,count) \
623 memset ((void *)(base), 0, sizeof (*(base)) * (count))
624
332#define array_needsize(base,cur,cnt,init) \ 625#define array_needsize(type,base,cur,cnt,init) \
333 if (expect_false ((cnt) > cur)) \ 626 if (expect_false ((cnt) > (cur))) \
334 { \ 627 { \
335 int newcnt = cur; \ 628 int ocur_ = (cur); \
336 do \ 629 (base) = (type *)array_realloc \
337 { \ 630 (sizeof (type), (base), &(cur), (cnt)); \
338 newcnt = array_roundsize (base, newcnt << 1); \ 631 init ((base) + (ocur_), (cur) - ocur_); \
339 } \
340 while ((cnt) > newcnt); \
341 \
342 base = ev_realloc (base, sizeof (*base) * (newcnt)); \
343 init (base + cur, newcnt - cur); \
344 cur = newcnt; \
345 } 632 }
346 633
634#if 0
347#define array_slim(stem) \ 635#define array_slim(type,stem) \
348 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ 636 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
349 { \ 637 { \
350 stem ## max = array_roundsize (stem ## cnt >> 1); \ 638 stem ## max = array_roundsize (stem ## cnt >> 1); \
351 base = ev_realloc (base, sizeof (*base) * (stem ## max)); \ 639 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
352 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 640 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
353 } 641 }
354 642#endif
355/* microsoft's pseudo-c is quite far from C as the rest of the world and the standard knows it */
356/* bringing us everlasting joy in form of stupid extra macros that are not required in C */
357#define array_free_microshit(stem) \
358 ev_free (stem ## s); stem ## cnt = stem ## max = 0;
359 643
360#define array_free(stem, idx) \ 644#define array_free(stem, idx) \
361 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 645 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
362 646
363/*****************************************************************************/ 647/*****************************************************************************/
364 648
365static void 649void noinline
366anfds_init (ANFD *base, int count) 650ev_feed_event (EV_P_ void *w, int revents)
367{ 651{
368 while (count--) 652 W w_ = (W)w;
369 { 653 int pri = ABSPRI (w_);
370 base->head = 0;
371 base->events = EV_NONE;
372 base->reify = 0;
373 654
374 ++base; 655 if (expect_false (w_->pending))
656 pendings [pri][w_->pending - 1].events |= revents;
657 else
375 } 658 {
376} 659 w_->pending = ++pendingcnt [pri];
377 660 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
378static void 661 pendings [pri][w_->pending - 1].w = w_;
379event (EV_P_ W w, int events)
380{
381 if (w->pending)
382 {
383 pendings [ABSPRI (w)][w->pending - 1].events |= events; 662 pendings [pri][w_->pending - 1].events = revents;
384 return;
385 } 663 }
386
387 w->pending = ++pendingcnt [ABSPRI (w)];
388 array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], (void));
389 pendings [ABSPRI (w)][w->pending - 1].w = w;
390 pendings [ABSPRI (w)][w->pending - 1].events = events;
391} 664}
392 665
393static void 666void inline_speed
394queue_events (EV_P_ W *events, int eventcnt, int type) 667queue_events (EV_P_ W *events, int eventcnt, int type)
395{ 668{
396 int i; 669 int i;
397 670
398 for (i = 0; i < eventcnt; ++i) 671 for (i = 0; i < eventcnt; ++i)
399 event (EV_A_ events [i], type); 672 ev_feed_event (EV_A_ events [i], type);
400} 673}
401 674
402static void 675/*****************************************************************************/
676
677void inline_speed
403fd_event (EV_P_ int fd, int events) 678fd_event (EV_P_ int fd, int revents)
404{ 679{
405 ANFD *anfd = anfds + fd; 680 ANFD *anfd = anfds + fd;
406 struct ev_io *w; 681 ev_io *w;
407 682
408 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) 683 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
409 { 684 {
410 int ev = w->events & events; 685 int ev = w->events & revents;
411 686
412 if (ev) 687 if (ev)
413 event (EV_A_ (W)w, ev); 688 ev_feed_event (EV_A_ (W)w, ev);
414 } 689 }
415} 690}
416 691
417/*****************************************************************************/ 692void
693ev_feed_fd_event (EV_P_ int fd, int revents)
694{
695 if (fd >= 0 && fd < anfdmax)
696 fd_event (EV_A_ fd, revents);
697}
418 698
419static void 699void inline_size
420fd_reify (EV_P) 700fd_reify (EV_P)
421{ 701{
422 int i; 702 int i;
423 703
424 for (i = 0; i < fdchangecnt; ++i) 704 for (i = 0; i < fdchangecnt; ++i)
425 { 705 {
426 int fd = fdchanges [i]; 706 int fd = fdchanges [i];
427 ANFD *anfd = anfds + fd; 707 ANFD *anfd = anfds + fd;
428 struct ev_io *w; 708 ev_io *w;
429 709
430 int events = 0; 710 unsigned char events = 0;
431 711
432 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) 712 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
433 events |= w->events; 713 events |= (unsigned char)w->events;
434 714
715#if EV_SELECT_IS_WINSOCKET
716 if (events)
717 {
718 unsigned long arg;
719 #ifdef EV_FD_TO_WIN32_HANDLE
720 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
721 #else
722 anfd->handle = _get_osfhandle (fd);
723 #endif
724 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
725 }
726#endif
727
728 {
729 unsigned char o_events = anfd->events;
730 unsigned char o_reify = anfd->reify;
731
435 anfd->reify = 0; 732 anfd->reify = 0;
436
437 method_modify (EV_A_ fd, anfd->events, events);
438 anfd->events = events; 733 anfd->events = events;
734
735 if (o_events != events || o_reify & EV_IOFDSET)
736 backend_modify (EV_A_ fd, o_events, events);
737 }
439 } 738 }
440 739
441 fdchangecnt = 0; 740 fdchangecnt = 0;
442} 741}
443 742
444static void 743void inline_size
445fd_change (EV_P_ int fd) 744fd_change (EV_P_ int fd, int flags)
446{ 745{
447 if (anfds [fd].reify) 746 unsigned char reify = anfds [fd].reify;
448 return;
449
450 anfds [fd].reify = 1; 747 anfds [fd].reify |= flags;
451 748
749 if (expect_true (!reify))
750 {
452 ++fdchangecnt; 751 ++fdchangecnt;
453 array_needsize (fdchanges, fdchangemax, fdchangecnt, (void)); 752 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
454 fdchanges [fdchangecnt - 1] = fd; 753 fdchanges [fdchangecnt - 1] = fd;
754 }
455} 755}
456 756
457static void 757void inline_speed
458fd_kill (EV_P_ int fd) 758fd_kill (EV_P_ int fd)
459{ 759{
460 struct ev_io *w; 760 ev_io *w;
461 761
462 while ((w = (struct ev_io *)anfds [fd].head)) 762 while ((w = (ev_io *)anfds [fd].head))
463 { 763 {
464 ev_io_stop (EV_A_ w); 764 ev_io_stop (EV_A_ w);
465 event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 765 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
466 } 766 }
467} 767}
468 768
469static int 769int inline_size
470fd_valid (int fd) 770fd_valid (int fd)
471{ 771{
472#ifdef WIN32 772#ifdef _WIN32
473 return !!win32_get_osfhandle (fd); 773 return _get_osfhandle (fd) != -1;
474#else 774#else
475 return fcntl (fd, F_GETFD) != -1; 775 return fcntl (fd, F_GETFD) != -1;
476#endif 776#endif
477} 777}
478 778
479/* called on EBADF to verify fds */ 779/* called on EBADF to verify fds */
480static void 780static void noinline
481fd_ebadf (EV_P) 781fd_ebadf (EV_P)
482{ 782{
483 int fd; 783 int fd;
484 784
485 for (fd = 0; fd < anfdmax; ++fd) 785 for (fd = 0; fd < anfdmax; ++fd)
486 if (anfds [fd].events) 786 if (anfds [fd].events)
487 if (!fd_valid (fd) == -1 && errno == EBADF) 787 if (!fd_valid (fd) && errno == EBADF)
488 fd_kill (EV_A_ fd); 788 fd_kill (EV_A_ fd);
489} 789}
490 790
491/* called on ENOMEM in select/poll to kill some fds and retry */ 791/* called on ENOMEM in select/poll to kill some fds and retry */
492static void 792static void noinline
493fd_enomem (EV_P) 793fd_enomem (EV_P)
494{ 794{
495 int fd; 795 int fd;
496 796
497 for (fd = anfdmax; fd--; ) 797 for (fd = anfdmax; fd--; )
… …
500 fd_kill (EV_A_ fd); 800 fd_kill (EV_A_ fd);
501 return; 801 return;
502 } 802 }
503} 803}
504 804
505/* usually called after fork if method needs to re-arm all fds from scratch */ 805/* usually called after fork if backend needs to re-arm all fds from scratch */
506static void 806static void noinline
507fd_rearm_all (EV_P) 807fd_rearm_all (EV_P)
508{ 808{
509 int fd; 809 int fd;
510 810
511 /* this should be highly optimised to not do anything but set a flag */
512 for (fd = 0; fd < anfdmax; ++fd) 811 for (fd = 0; fd < anfdmax; ++fd)
513 if (anfds [fd].events) 812 if (anfds [fd].events)
514 { 813 {
515 anfds [fd].events = 0; 814 anfds [fd].events = 0;
815 anfds [fd].emask = 0;
516 fd_change (EV_A_ fd); 816 fd_change (EV_A_ fd, EV_IOFDSET | 1);
517 } 817 }
518} 818}
519 819
520/*****************************************************************************/ 820/*****************************************************************************/
521 821
522static void 822/*
523upheap (WT *heap, int k) 823 * the heap functions want a real array index. array index 0 uis guaranteed to not
524{ 824 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
525 WT w = heap [k]; 825 * the branching factor of the d-tree.
826 */
526 827
527 while (k && heap [k >> 1]->at > w->at) 828/*
528 { 829 * at the moment we allow libev the luxury of two heaps,
529 heap [k] = heap [k >> 1]; 830 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
530 ((W)heap [k])->active = k + 1; 831 * which is more cache-efficient.
531 k >>= 1; 832 * the difference is about 5% with 50000+ watchers.
532 } 833 */
834#if EV_USE_4HEAP
533 835
534 heap [k] = w; 836#define DHEAP 4
535 ((W)heap [k])->active = k + 1; 837#define HEAP0 (DHEAP - 1) /* index of first element in heap */
838#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
839#define UPHEAP_DONE(p,k) ((p) == (k))
536 840
537} 841/* away from the root */
538 842void inline_speed
539static void
540downheap (WT *heap, int N, int k) 843downheap (ANHE *heap, int N, int k)
541{ 844{
542 WT w = heap [k]; 845 ANHE he = heap [k];
846 ANHE *E = heap + N + HEAP0;
543 847
544 while (k < (N >> 1)) 848 for (;;)
545 { 849 {
546 int j = k << 1; 850 ev_tstamp minat;
851 ANHE *minpos;
852 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
547 853
548 if (j + 1 < N && heap [j]->at > heap [j + 1]->at) 854 /* find minimum child */
855 if (expect_true (pos + DHEAP - 1 < E))
549 ++j; 856 {
550 857 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
551 if (w->at <= heap [j]->at) 858 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
859 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
860 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
861 }
862 else if (pos < E)
863 {
864 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
865 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
866 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
867 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
868 }
869 else
552 break; 870 break;
553 871
872 if (ANHE_at (he) <= minat)
873 break;
874
875 heap [k] = *minpos;
876 ev_active (ANHE_w (*minpos)) = k;
877
878 k = minpos - heap;
879 }
880
881 heap [k] = he;
882 ev_active (ANHE_w (he)) = k;
883}
884
885#else /* 4HEAP */
886
887#define HEAP0 1
888#define HPARENT(k) ((k) >> 1)
889#define UPHEAP_DONE(p,k) (!(p))
890
891/* away from the root */
892void inline_speed
893downheap (ANHE *heap, int N, int k)
894{
895 ANHE he = heap [k];
896
897 for (;;)
898 {
899 int c = k << 1;
900
901 if (c > N + HEAP0 - 1)
902 break;
903
904 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
905 ? 1 : 0;
906
907 if (ANHE_at (he) <= ANHE_at (heap [c]))
908 break;
909
554 heap [k] = heap [j]; 910 heap [k] = heap [c];
555 ((W)heap [k])->active = k + 1; 911 ev_active (ANHE_w (heap [k])) = k;
912
556 k = j; 913 k = c;
557 } 914 }
558 915
559 heap [k] = w; 916 heap [k] = he;
560 ((W)heap [k])->active = k + 1; 917 ev_active (ANHE_w (he)) = k;
918}
919#endif
920
921/* towards the root */
922void inline_speed
923upheap (ANHE *heap, int k)
924{
925 ANHE he = heap [k];
926
927 for (;;)
928 {
929 int p = HPARENT (k);
930
931 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
932 break;
933
934 heap [k] = heap [p];
935 ev_active (ANHE_w (heap [k])) = k;
936 k = p;
937 }
938
939 heap [k] = he;
940 ev_active (ANHE_w (he)) = k;
941}
942
943void inline_size
944adjustheap (ANHE *heap, int N, int k)
945{
946 if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))
947 upheap (heap, k);
948 else
949 downheap (heap, N, k);
950}
951
952/* rebuild the heap: this function is used only once and executed rarely */
953void inline_size
954reheap (ANHE *heap, int N)
955{
956 int i;
957
958 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
959 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
960 for (i = 0; i < N; ++i)
961 upheap (heap, i + HEAP0);
561} 962}
562 963
563/*****************************************************************************/ 964/*****************************************************************************/
564 965
565typedef struct 966typedef struct
566{ 967{
567 WL head; 968 WL head;
568 sig_atomic_t volatile gotsig; 969 EV_ATOMIC_T gotsig;
569} ANSIG; 970} ANSIG;
570 971
571static ANSIG *signals; 972static ANSIG *signals;
572static int signalmax; 973static int signalmax;
573 974
574static int sigpipe [2]; 975static EV_ATOMIC_T gotsig;
575static sig_atomic_t volatile gotsig; 976
576static struct ev_io sigev; 977/*****************************************************************************/
978
979void inline_speed
980fd_intern (int fd)
981{
982#ifdef _WIN32
983 unsigned long arg = 1;
984 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
985#else
986 fcntl (fd, F_SETFD, FD_CLOEXEC);
987 fcntl (fd, F_SETFL, O_NONBLOCK);
988#endif
989}
990
991static void noinline
992evpipe_init (EV_P)
993{
994 if (!ev_is_active (&pipeev))
995 {
996#if EV_USE_EVENTFD
997 if ((evfd = eventfd (0, 0)) >= 0)
998 {
999 evpipe [0] = -1;
1000 fd_intern (evfd);
1001 ev_io_set (&pipeev, evfd, EV_READ);
1002 }
1003 else
1004#endif
1005 {
1006 while (pipe (evpipe))
1007 ev_syserr ("(libev) error creating signal/async pipe");
1008
1009 fd_intern (evpipe [0]);
1010 fd_intern (evpipe [1]);
1011 ev_io_set (&pipeev, evpipe [0], EV_READ);
1012 }
1013
1014 ev_io_start (EV_A_ &pipeev);
1015 ev_unref (EV_A); /* watcher should not keep loop alive */
1016 }
1017}
1018
1019void inline_size
1020evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1021{
1022 if (!*flag)
1023 {
1024 int old_errno = errno; /* save errno because write might clobber it */
1025
1026 *flag = 1;
1027
1028#if EV_USE_EVENTFD
1029 if (evfd >= 0)
1030 {
1031 uint64_t counter = 1;
1032 write (evfd, &counter, sizeof (uint64_t));
1033 }
1034 else
1035#endif
1036 write (evpipe [1], &old_errno, 1);
1037
1038 errno = old_errno;
1039 }
1040}
577 1041
578static void 1042static void
579signals_init (ANSIG *base, int count) 1043pipecb (EV_P_ ev_io *iow, int revents)
580{ 1044{
581 while (count--) 1045#if EV_USE_EVENTFD
1046 if (evfd >= 0)
1047 {
1048 uint64_t counter;
1049 read (evfd, &counter, sizeof (uint64_t));
582 { 1050 }
583 base->head = 0; 1051 else
1052#endif
1053 {
1054 char dummy;
1055 read (evpipe [0], &dummy, 1);
1056 }
1057
1058 if (gotsig && ev_is_default_loop (EV_A))
1059 {
1060 int signum;
584 base->gotsig = 0; 1061 gotsig = 0;
585 1062
586 ++base; 1063 for (signum = signalmax; signum--; )
1064 if (signals [signum].gotsig)
1065 ev_feed_signal_event (EV_A_ signum + 1);
1066 }
1067
1068#if EV_ASYNC_ENABLE
1069 if (gotasync)
587 } 1070 {
1071 int i;
1072 gotasync = 0;
1073
1074 for (i = asynccnt; i--; )
1075 if (asyncs [i]->sent)
1076 {
1077 asyncs [i]->sent = 0;
1078 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1079 }
1080 }
1081#endif
588} 1082}
1083
1084/*****************************************************************************/
589 1085
590static void 1086static void
591sighandler (int signum) 1087ev_sighandler (int signum)
592{ 1088{
1089#if EV_MULTIPLICITY
1090 struct ev_loop *loop = &default_loop_struct;
1091#endif
1092
593#if WIN32 1093#if _WIN32
594 signal (signum, sighandler); 1094 signal (signum, ev_sighandler);
595#endif 1095#endif
596 1096
597 signals [signum - 1].gotsig = 1; 1097 signals [signum - 1].gotsig = 1;
598 1098 evpipe_write (EV_A_ &gotsig);
599 if (!gotsig)
600 {
601 int old_errno = errno;
602 gotsig = 1;
603 write (sigpipe [1], &signum, 1);
604 errno = old_errno;
605 }
606} 1099}
607 1100
608static void 1101void noinline
609sigcb (EV_P_ struct ev_io *iow, int revents) 1102ev_feed_signal_event (EV_P_ int signum)
610{ 1103{
611 WL w; 1104 WL w;
1105
1106#if EV_MULTIPLICITY
1107 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
1108#endif
1109
612 int signum; 1110 --signum;
613 1111
614 read (sigpipe [0], &revents, 1); 1112 if (signum < 0 || signum >= signalmax)
615 gotsig = 0; 1113 return;
616 1114
617 for (signum = signalmax; signum--; )
618 if (signals [signum].gotsig)
619 {
620 signals [signum].gotsig = 0; 1115 signals [signum].gotsig = 0;
621 1116
622 for (w = signals [signum].head; w; w = w->next) 1117 for (w = signals [signum].head; w; w = w->next)
623 event (EV_A_ (W)w, EV_SIGNAL); 1118 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
624 }
625}
626
627static void
628siginit (EV_P)
629{
630#ifndef WIN32
631 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
632 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
633
634 /* rather than sort out wether we really need nb, set it */
635 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
636 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
637#endif
638
639 ev_io_set (&sigev, sigpipe [0], EV_READ);
640 ev_io_start (EV_A_ &sigev);
641 ev_unref (EV_A); /* child watcher should not keep loop alive */
642} 1119}
643 1120
644/*****************************************************************************/ 1121/*****************************************************************************/
645 1122
646static struct ev_child *childs [PID_HASHSIZE]; 1123static WL childs [EV_PID_HASHSIZE];
647 1124
648#ifndef WIN32 1125#ifndef _WIN32
649 1126
650static struct ev_signal childev; 1127static ev_signal childev;
1128
1129#ifndef WIFCONTINUED
1130# define WIFCONTINUED(status) 0
1131#endif
1132
1133void inline_speed
1134child_reap (EV_P_ int chain, int pid, int status)
1135{
1136 ev_child *w;
1137 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1138
1139 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1140 {
1141 if ((w->pid == pid || !w->pid)
1142 && (!traced || (w->flags & 1)))
1143 {
1144 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1145 w->rpid = pid;
1146 w->rstatus = status;
1147 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1148 }
1149 }
1150}
651 1151
652#ifndef WCONTINUED 1152#ifndef WCONTINUED
653# define WCONTINUED 0 1153# define WCONTINUED 0
654#endif 1154#endif
655 1155
656static void 1156static void
657child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
658{
659 struct ev_child *w;
660
661 for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
662 if (w->pid == pid || !w->pid)
663 {
664 ev_priority (w) = ev_priority (sw); /* need to do it *now* */
665 w->rpid = pid;
666 w->rstatus = status;
667 event (EV_A_ (W)w, EV_CHILD);
668 }
669}
670
671static void
672childcb (EV_P_ struct ev_signal *sw, int revents) 1157childcb (EV_P_ ev_signal *sw, int revents)
673{ 1158{
674 int pid, status; 1159 int pid, status;
675 1160
1161 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
676 if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) 1162 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
677 { 1163 if (!WCONTINUED
1164 || errno != EINVAL
1165 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1166 return;
1167
678 /* make sure we are called again until all childs have been reaped */ 1168 /* make sure we are called again until all children have been reaped */
1169 /* we need to do it this way so that the callback gets called before we continue */
679 event (EV_A_ (W)sw, EV_SIGNAL); 1170 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
680 1171
681 child_reap (EV_A_ sw, pid, pid, status); 1172 child_reap (EV_A_ pid, pid, status);
1173 if (EV_PID_HASHSIZE > 1)
682 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */ 1174 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
683 }
684} 1175}
685 1176
686#endif 1177#endif
687 1178
688/*****************************************************************************/ 1179/*****************************************************************************/
689 1180
1181#if EV_USE_PORT
1182# include "ev_port.c"
1183#endif
690#if EV_USE_KQUEUE 1184#if EV_USE_KQUEUE
691# include "ev_kqueue.c" 1185# include "ev_kqueue.c"
692#endif 1186#endif
693#if EV_USE_EPOLL 1187#if EV_USE_EPOLL
694# include "ev_epoll.c" 1188# include "ev_epoll.c"
… …
711{ 1205{
712 return EV_VERSION_MINOR; 1206 return EV_VERSION_MINOR;
713} 1207}
714 1208
715/* return true if we are running with elevated privileges and should ignore env variables */ 1209/* return true if we are running with elevated privileges and should ignore env variables */
716static int 1210int inline_size
717enable_secure (void) 1211enable_secure (void)
718{ 1212{
719#ifdef WIN32 1213#ifdef _WIN32
720 return 0; 1214 return 0;
721#else 1215#else
722 return getuid () != geteuid () 1216 return getuid () != geteuid ()
723 || getgid () != getegid (); 1217 || getgid () != getegid ();
724#endif 1218#endif
725} 1219}
726 1220
727int 1221unsigned int
728ev_method (EV_P) 1222ev_supported_backends (void)
729{ 1223{
730 return method; 1224 unsigned int flags = 0;
731}
732 1225
733static void 1226 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
734loop_init (EV_P_ int methods) 1227 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1228 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1229 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1230 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1231
1232 return flags;
1233}
1234
1235unsigned int
1236ev_recommended_backends (void)
735{ 1237{
736 if (!method) 1238 unsigned int flags = ev_supported_backends ();
1239
1240#ifndef __NetBSD__
1241 /* kqueue is borked on everything but netbsd apparently */
1242 /* it usually doesn't work correctly on anything but sockets and pipes */
1243 flags &= ~EVBACKEND_KQUEUE;
1244#endif
1245#ifdef __APPLE__
1246 // flags &= ~EVBACKEND_KQUEUE; for documentation
1247 flags &= ~EVBACKEND_POLL;
1248#endif
1249
1250 return flags;
1251}
1252
1253unsigned int
1254ev_embeddable_backends (void)
1255{
1256 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1257
1258 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1259 /* please fix it and tell me how to detect the fix */
1260 flags &= ~EVBACKEND_EPOLL;
1261
1262 return flags;
1263}
1264
1265unsigned int
1266ev_backend (EV_P)
1267{
1268 return backend;
1269}
1270
1271unsigned int
1272ev_loop_count (EV_P)
1273{
1274 return loop_count;
1275}
1276
1277void
1278ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1279{
1280 io_blocktime = interval;
1281}
1282
1283void
1284ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1285{
1286 timeout_blocktime = interval;
1287}
1288
1289static void noinline
1290loop_init (EV_P_ unsigned int flags)
1291{
1292 if (!backend)
737 { 1293 {
738#if EV_USE_MONOTONIC 1294#if EV_USE_MONOTONIC
739 { 1295 {
740 struct timespec ts; 1296 struct timespec ts;
741 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1297 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
742 have_monotonic = 1; 1298 have_monotonic = 1;
743 } 1299 }
744#endif 1300#endif
745 1301
746 rt_now = ev_time (); 1302 ev_rt_now = ev_time ();
747 mn_now = get_clock (); 1303 mn_now = get_clock ();
748 now_floor = mn_now; 1304 now_floor = mn_now;
749 rtmn_diff = rt_now - mn_now; 1305 rtmn_diff = ev_rt_now - mn_now;
750 1306
751 if (methods == EVMETHOD_AUTO) 1307 io_blocktime = 0.;
752 if (!enable_secure () && getenv ("LIBEV_METHODS")) 1308 timeout_blocktime = 0.;
1309 backend = 0;
1310 backend_fd = -1;
1311 gotasync = 0;
1312#if EV_USE_INOTIFY
1313 fs_fd = -2;
1314#endif
1315
1316 /* pid check not overridable via env */
1317#ifndef _WIN32
1318 if (flags & EVFLAG_FORKCHECK)
1319 curpid = getpid ();
1320#endif
1321
1322 if (!(flags & EVFLAG_NOENV)
1323 && !enable_secure ()
1324 && getenv ("LIBEV_FLAGS"))
753 methods = atoi (getenv ("LIBEV_METHODS")); 1325 flags = atoi (getenv ("LIBEV_FLAGS"));
754 else
755 methods = EVMETHOD_ANY;
756 1326
757 method = 0; 1327 if (!(flags & 0x0000ffffU))
758#if EV_USE_WIN32 1328 flags |= ev_recommended_backends ();
759 if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods); 1329
1330#if EV_USE_PORT
1331 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
760#endif 1332#endif
761#if EV_USE_KQUEUE 1333#if EV_USE_KQUEUE
762 if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods); 1334 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
763#endif 1335#endif
764#if EV_USE_EPOLL 1336#if EV_USE_EPOLL
765 if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods); 1337 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
766#endif 1338#endif
767#if EV_USE_POLL 1339#if EV_USE_POLL
768 if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods); 1340 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
769#endif 1341#endif
770#if EV_USE_SELECT 1342#if EV_USE_SELECT
771 if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods); 1343 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
772#endif 1344#endif
773 1345
774 ev_watcher_init (&sigev, sigcb); 1346 ev_init (&pipeev, pipecb);
775 ev_set_priority (&sigev, EV_MAXPRI); 1347 ev_set_priority (&pipeev, EV_MAXPRI);
776 } 1348 }
777} 1349}
778 1350
779void 1351static void noinline
780loop_destroy (EV_P) 1352loop_destroy (EV_P)
781{ 1353{
782 int i; 1354 int i;
783 1355
1356 if (ev_is_active (&pipeev))
1357 {
1358 ev_ref (EV_A); /* signal watcher */
1359 ev_io_stop (EV_A_ &pipeev);
1360
1361#if EV_USE_EVENTFD
1362 if (evfd >= 0)
1363 close (evfd);
1364#endif
1365
1366 if (evpipe [0] >= 0)
1367 {
1368 close (evpipe [0]);
1369 close (evpipe [1]);
1370 }
1371 }
1372
784#if EV_USE_WIN32 1373#if EV_USE_INOTIFY
785 if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A); 1374 if (fs_fd >= 0)
1375 close (fs_fd);
1376#endif
1377
1378 if (backend_fd >= 0)
1379 close (backend_fd);
1380
1381#if EV_USE_PORT
1382 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
786#endif 1383#endif
787#if EV_USE_KQUEUE 1384#if EV_USE_KQUEUE
788 if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A); 1385 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
789#endif 1386#endif
790#if EV_USE_EPOLL 1387#if EV_USE_EPOLL
791 if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A); 1388 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
792#endif 1389#endif
793#if EV_USE_POLL 1390#if EV_USE_POLL
794 if (method == EVMETHOD_POLL ) poll_destroy (EV_A); 1391 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
795#endif 1392#endif
796#if EV_USE_SELECT 1393#if EV_USE_SELECT
797 if (method == EVMETHOD_SELECT) select_destroy (EV_A); 1394 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
798#endif 1395#endif
799 1396
800 for (i = NUMPRI; i--; ) 1397 for (i = NUMPRI; i--; )
1398 {
801 array_free (pending, [i]); 1399 array_free (pending, [i]);
1400#if EV_IDLE_ENABLE
1401 array_free (idle, [i]);
1402#endif
1403 }
1404
1405 ev_free (anfds); anfdmax = 0;
802 1406
803 /* have to use the microsoft-never-gets-it-right macro */ 1407 /* have to use the microsoft-never-gets-it-right macro */
804 array_free_microshit (fdchange); 1408 array_free (fdchange, EMPTY);
805 array_free_microshit (timer); 1409 array_free (timer, EMPTY);
806 array_free_microshit (periodic); 1410#if EV_PERIODIC_ENABLE
807 array_free_microshit (idle); 1411 array_free (periodic, EMPTY);
808 array_free_microshit (prepare); 1412#endif
809 array_free_microshit (check); 1413#if EV_FORK_ENABLE
1414 array_free (fork, EMPTY);
1415#endif
1416 array_free (prepare, EMPTY);
1417 array_free (check, EMPTY);
1418#if EV_ASYNC_ENABLE
1419 array_free (async, EMPTY);
1420#endif
810 1421
811 method = 0; 1422 backend = 0;
812} 1423}
813 1424
814static void 1425#if EV_USE_INOTIFY
1426void inline_size infy_fork (EV_P);
1427#endif
1428
1429void inline_size
815loop_fork (EV_P) 1430loop_fork (EV_P)
816{ 1431{
1432#if EV_USE_PORT
1433 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1434#endif
1435#if EV_USE_KQUEUE
1436 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1437#endif
817#if EV_USE_EPOLL 1438#if EV_USE_EPOLL
818 if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A); 1439 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
819#endif 1440#endif
820#if EV_USE_KQUEUE 1441#if EV_USE_INOTIFY
821 if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A); 1442 infy_fork (EV_A);
822#endif 1443#endif
823 1444
824 if (ev_is_active (&sigev)) 1445 if (ev_is_active (&pipeev))
825 { 1446 {
826 /* default loop */ 1447 /* this "locks" the handlers against writing to the pipe */
1448 /* while we modify the fd vars */
1449 gotsig = 1;
1450#if EV_ASYNC_ENABLE
1451 gotasync = 1;
1452#endif
827 1453
828 ev_ref (EV_A); 1454 ev_ref (EV_A);
829 ev_io_stop (EV_A_ &sigev); 1455 ev_io_stop (EV_A_ &pipeev);
1456
1457#if EV_USE_EVENTFD
1458 if (evfd >= 0)
1459 close (evfd);
1460#endif
1461
1462 if (evpipe [0] >= 0)
1463 {
830 close (sigpipe [0]); 1464 close (evpipe [0]);
831 close (sigpipe [1]); 1465 close (evpipe [1]);
1466 }
832 1467
833 while (ev_pipe (sigpipe))
834 syserr ("(libev) error creating pipe");
835
836 siginit (EV_A); 1468 evpipe_init (EV_A);
1469 /* now iterate over everything, in case we missed something */
1470 pipecb (EV_A_ &pipeev, EV_READ);
837 } 1471 }
838 1472
839 postfork = 0; 1473 postfork = 0;
840} 1474}
1475
1476#if EV_MULTIPLICITY
1477
1478struct ev_loop *
1479ev_loop_new (unsigned int flags)
1480{
1481 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1482
1483 memset (loop, 0, sizeof (struct ev_loop));
1484
1485 loop_init (EV_A_ flags);
1486
1487 if (ev_backend (EV_A))
1488 return loop;
1489
1490 return 0;
1491}
1492
1493void
1494ev_loop_destroy (EV_P)
1495{
1496 loop_destroy (EV_A);
1497 ev_free (loop);
1498}
1499
1500void
1501ev_loop_fork (EV_P)
1502{
1503 postfork = 1; /* must be in line with ev_default_fork */
1504}
1505
1506#if EV_VERIFY
1507static void noinline
1508verify_watcher (EV_P_ W w)
1509{
1510 assert (("watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1511
1512 if (w->pending)
1513 assert (("pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1514}
1515
1516static void noinline
1517verify_heap (EV_P_ ANHE *heap, int N)
1518{
1519 int i;
1520
1521 for (i = HEAP0; i < N + HEAP0; ++i)
1522 {
1523 assert (("active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1524 assert (("heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1525 assert (("heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1526
1527 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1528 }
1529}
1530
1531static void noinline
1532array_verify (EV_P_ W *ws, int cnt)
1533{
1534 while (cnt--)
1535 {
1536 assert (("active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1537 verify_watcher (EV_A_ ws [cnt]);
1538 }
1539}
1540#endif
1541
1542void
1543ev_loop_verify (EV_P)
1544{
1545#if EV_VERIFY
1546 int i;
1547 WL w;
1548
1549 assert (activecnt >= -1);
1550
1551 assert (fdchangemax >= fdchangecnt);
1552 for (i = 0; i < fdchangecnt; ++i)
1553 assert (("negative fd in fdchanges", fdchanges [i] >= 0));
1554
1555 assert (anfdmax >= 0);
1556 for (i = 0; i < anfdmax; ++i)
1557 for (w = anfds [i].head; w; w = w->next)
1558 {
1559 verify_watcher (EV_A_ (W)w);
1560 assert (("inactive fd watcher on anfd list", ev_active (w) == 1));
1561 assert (("fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1562 }
1563
1564 assert (timermax >= timercnt);
1565 verify_heap (EV_A_ timers, timercnt);
1566
1567#if EV_PERIODIC_ENABLE
1568 assert (periodicmax >= periodiccnt);
1569 verify_heap (EV_A_ periodics, periodiccnt);
1570#endif
1571
1572 for (i = NUMPRI; i--; )
1573 {
1574 assert (pendingmax [i] >= pendingcnt [i]);
1575#if EV_IDLE_ENABLE
1576 assert (idleall >= 0);
1577 assert (idlemax [i] >= idlecnt [i]);
1578 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1579#endif
1580 }
1581
1582#if EV_FORK_ENABLE
1583 assert (forkmax >= forkcnt);
1584 array_verify (EV_A_ (W *)forks, forkcnt);
1585#endif
1586
1587#if EV_ASYNC_ENABLE
1588 assert (asyncmax >= asynccnt);
1589 array_verify (EV_A_ (W *)asyncs, asynccnt);
1590#endif
1591
1592 assert (preparemax >= preparecnt);
1593 array_verify (EV_A_ (W *)prepares, preparecnt);
1594
1595 assert (checkmax >= checkcnt);
1596 array_verify (EV_A_ (W *)checks, checkcnt);
1597
1598# if 0
1599 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1600 for (signum = signalmax; signum--; ) if (signals [signum].gotsig)
1601# endif
1602#endif
1603}
1604
1605#endif /* multiplicity */
841 1606
842#if EV_MULTIPLICITY 1607#if EV_MULTIPLICITY
843struct ev_loop * 1608struct ev_loop *
844ev_loop_new (int methods) 1609ev_default_loop_init (unsigned int flags)
845{ 1610#else
846 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 1611int
847 1612ev_default_loop (unsigned int flags)
848 memset (loop, 0, sizeof (struct ev_loop));
849
850 loop_init (EV_A_ methods);
851
852 if (ev_method (EV_A))
853 return loop;
854
855 return 0;
856}
857
858void
859ev_loop_destroy (EV_P)
860{
861 loop_destroy (EV_A);
862 ev_free (loop);
863}
864
865void
866ev_loop_fork (EV_P)
867{
868 postfork = 1;
869}
870
871#endif 1613#endif
872 1614{
1615 if (!ev_default_loop_ptr)
1616 {
873#if EV_MULTIPLICITY 1617#if EV_MULTIPLICITY
874struct ev_loop default_loop_struct; 1618 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
875static struct ev_loop *default_loop;
876
877struct ev_loop *
878#else 1619#else
879static int default_loop;
880
881int
882#endif
883ev_default_loop (int methods)
884{
885 if (sigpipe [0] == sigpipe [1])
886 if (ev_pipe (sigpipe))
887 return 0;
888
889 if (!default_loop)
890 {
891#if EV_MULTIPLICITY
892 struct ev_loop *loop = default_loop = &default_loop_struct;
893#else
894 default_loop = 1; 1620 ev_default_loop_ptr = 1;
895#endif 1621#endif
896 1622
897 loop_init (EV_A_ methods); 1623 loop_init (EV_A_ flags);
898 1624
899 if (ev_method (EV_A)) 1625 if (ev_backend (EV_A))
900 { 1626 {
901 siginit (EV_A);
902
903#ifndef WIN32 1627#ifndef _WIN32
904 ev_signal_init (&childev, childcb, SIGCHLD); 1628 ev_signal_init (&childev, childcb, SIGCHLD);
905 ev_set_priority (&childev, EV_MAXPRI); 1629 ev_set_priority (&childev, EV_MAXPRI);
906 ev_signal_start (EV_A_ &childev); 1630 ev_signal_start (EV_A_ &childev);
907 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1631 ev_unref (EV_A); /* child watcher should not keep loop alive */
908#endif 1632#endif
909 } 1633 }
910 else 1634 else
911 default_loop = 0; 1635 ev_default_loop_ptr = 0;
912 } 1636 }
913 1637
914 return default_loop; 1638 return ev_default_loop_ptr;
915} 1639}
916 1640
917void 1641void
918ev_default_destroy (void) 1642ev_default_destroy (void)
919{ 1643{
920#if EV_MULTIPLICITY 1644#if EV_MULTIPLICITY
921 struct ev_loop *loop = default_loop; 1645 struct ev_loop *loop = ev_default_loop_ptr;
922#endif 1646#endif
923 1647
1648 ev_default_loop_ptr = 0;
1649
924#ifndef WIN32 1650#ifndef _WIN32
925 ev_ref (EV_A); /* child watcher */ 1651 ev_ref (EV_A); /* child watcher */
926 ev_signal_stop (EV_A_ &childev); 1652 ev_signal_stop (EV_A_ &childev);
927#endif 1653#endif
928 1654
929 ev_ref (EV_A); /* signal watcher */
930 ev_io_stop (EV_A_ &sigev);
931
932 close (sigpipe [0]); sigpipe [0] = 0;
933 close (sigpipe [1]); sigpipe [1] = 0;
934
935 loop_destroy (EV_A); 1655 loop_destroy (EV_A);
936} 1656}
937 1657
938void 1658void
939ev_default_fork (void) 1659ev_default_fork (void)
940{ 1660{
941#if EV_MULTIPLICITY 1661#if EV_MULTIPLICITY
942 struct ev_loop *loop = default_loop; 1662 struct ev_loop *loop = ev_default_loop_ptr;
943#endif 1663#endif
944 1664
945 if (method) 1665 postfork = 1; /* must be in line with ev_loop_fork */
946 postfork = 1;
947} 1666}
948 1667
949/*****************************************************************************/ 1668/*****************************************************************************/
950 1669
951static void 1670void
1671ev_invoke (EV_P_ void *w, int revents)
1672{
1673 EV_CB_INVOKE ((W)w, revents);
1674}
1675
1676void inline_speed
952call_pending (EV_P) 1677call_pending (EV_P)
953{ 1678{
954 int pri; 1679 int pri;
955 1680
956 for (pri = NUMPRI; pri--; ) 1681 for (pri = NUMPRI; pri--; )
957 while (pendingcnt [pri]) 1682 while (pendingcnt [pri])
958 { 1683 {
959 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 1684 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
960 1685
961 if (p->w) 1686 if (expect_true (p->w))
962 { 1687 {
1688 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1689
963 p->w->pending = 0; 1690 p->w->pending = 0;
964 p->w->cb (EV_A_ p->w, p->events); 1691 EV_CB_INVOKE (p->w, p->events);
1692 EV_FREQUENT_CHECK;
965 } 1693 }
966 } 1694 }
967} 1695}
968 1696
969static void 1697#if EV_IDLE_ENABLE
1698void inline_size
1699idle_reify (EV_P)
1700{
1701 if (expect_false (idleall))
1702 {
1703 int pri;
1704
1705 for (pri = NUMPRI; pri--; )
1706 {
1707 if (pendingcnt [pri])
1708 break;
1709
1710 if (idlecnt [pri])
1711 {
1712 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
1713 break;
1714 }
1715 }
1716 }
1717}
1718#endif
1719
1720void inline_size
970timers_reify (EV_P) 1721timers_reify (EV_P)
971{ 1722{
1723 EV_FREQUENT_CHECK;
1724
972 while (timercnt && ((WT)timers [0])->at <= mn_now) 1725 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
973 { 1726 {
974 struct ev_timer *w = timers [0]; 1727 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
975 1728
976 assert (("inactive timer on timer heap detected", ev_is_active (w))); 1729 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
977 1730
978 /* first reschedule or stop timer */ 1731 /* first reschedule or stop timer */
979 if (w->repeat) 1732 if (w->repeat)
980 { 1733 {
1734 ev_at (w) += w->repeat;
1735 if (ev_at (w) < mn_now)
1736 ev_at (w) = mn_now;
1737
981 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 1738 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
982 ((WT)w)->at = mn_now + w->repeat; 1739
1740 ANHE_at_cache (timers [HEAP0]);
983 downheap ((WT *)timers, timercnt, 0); 1741 downheap (timers, timercnt, HEAP0);
984 } 1742 }
985 else 1743 else
986 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */ 1744 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
987 1745
1746 EV_FREQUENT_CHECK;
988 event (EV_A_ (W)w, EV_TIMEOUT); 1747 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
989 } 1748 }
990} 1749}
991 1750
992static void 1751#if EV_PERIODIC_ENABLE
1752void inline_size
993periodics_reify (EV_P) 1753periodics_reify (EV_P)
994{ 1754{
1755 EV_FREQUENT_CHECK;
1756
995 while (periodiccnt && ((WT)periodics [0])->at <= rt_now) 1757 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
996 { 1758 {
997 struct ev_periodic *w = periodics [0]; 1759 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
998 1760
999 assert (("inactive timer on periodic heap detected", ev_is_active (w))); 1761 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1000 1762
1001 /* first reschedule or stop timer */ 1763 /* first reschedule or stop timer */
1002 if (w->interval) 1764 if (w->reschedule_cb)
1003 { 1765 {
1004 ((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval; 1766 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1005 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now)); 1767
1768 assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1769
1770 ANHE_at_cache (periodics [HEAP0]);
1006 downheap ((WT *)periodics, periodiccnt, 0); 1771 downheap (periodics, periodiccnt, HEAP0);
1772 }
1773 else if (w->interval)
1774 {
1775 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1776 /* if next trigger time is not sufficiently in the future, put it there */
1777 /* this might happen because of floating point inexactness */
1778 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1779 {
1780 ev_at (w) += w->interval;
1781
1782 /* if interval is unreasonably low we might still have a time in the past */
1783 /* so correct this. this will make the periodic very inexact, but the user */
1784 /* has effectively asked to get triggered more often than possible */
1785 if (ev_at (w) < ev_rt_now)
1786 ev_at (w) = ev_rt_now;
1787 }
1788
1789 ANHE_at_cache (periodics [HEAP0]);
1790 downheap (periodics, periodiccnt, HEAP0);
1007 } 1791 }
1008 else 1792 else
1009 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 1793 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1010 1794
1795 EV_FREQUENT_CHECK;
1011 event (EV_A_ (W)w, EV_PERIODIC); 1796 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1012 } 1797 }
1013} 1798}
1014 1799
1015static void 1800static void noinline
1016periodics_reschedule (EV_P) 1801periodics_reschedule (EV_P)
1017{ 1802{
1018 int i; 1803 int i;
1019 1804
1020 /* adjust periodics after time jump */ 1805 /* adjust periodics after time jump */
1021 for (i = 0; i < periodiccnt; ++i) 1806 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
1022 { 1807 {
1023 struct ev_periodic *w = periodics [i]; 1808 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
1024 1809
1810 if (w->reschedule_cb)
1811 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1025 if (w->interval) 1812 else if (w->interval)
1813 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1814
1815 ANHE_at_cache (periodics [i]);
1816 }
1817
1818 reheap (periodics, periodiccnt);
1819}
1820#endif
1821
1822void inline_speed
1823time_update (EV_P_ ev_tstamp max_block)
1824{
1825 int i;
1826
1827#if EV_USE_MONOTONIC
1828 if (expect_true (have_monotonic))
1829 {
1830 ev_tstamp odiff = rtmn_diff;
1831
1832 mn_now = get_clock ();
1833
1834 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1835 /* interpolate in the meantime */
1836 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1026 { 1837 {
1027 ev_tstamp diff = ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval; 1838 ev_rt_now = rtmn_diff + mn_now;
1839 return;
1840 }
1028 1841
1029 if (fabs (diff) >= 1e-4) 1842 now_floor = mn_now;
1843 ev_rt_now = ev_time ();
1844
1845 /* loop a few times, before making important decisions.
1846 * on the choice of "4": one iteration isn't enough,
1847 * in case we get preempted during the calls to
1848 * ev_time and get_clock. a second call is almost guaranteed
1849 * to succeed in that case, though. and looping a few more times
1850 * doesn't hurt either as we only do this on time-jumps or
1851 * in the unlikely event of having been preempted here.
1852 */
1853 for (i = 4; --i; )
1854 {
1855 rtmn_diff = ev_rt_now - mn_now;
1856
1857 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1858 return; /* all is well */
1859
1860 ev_rt_now = ev_time ();
1861 mn_now = get_clock ();
1862 now_floor = mn_now;
1863 }
1864
1865# if EV_PERIODIC_ENABLE
1866 periodics_reschedule (EV_A);
1867# endif
1868 /* no timer adjustment, as the monotonic clock doesn't jump */
1869 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1870 }
1871 else
1872#endif
1873 {
1874 ev_rt_now = ev_time ();
1875
1876 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1877 {
1878#if EV_PERIODIC_ENABLE
1879 periodics_reschedule (EV_A);
1880#endif
1881 /* adjust timers. this is easy, as the offset is the same for all of them */
1882 for (i = 0; i < timercnt; ++i)
1030 { 1883 {
1031 ev_periodic_stop (EV_A_ w); 1884 ANHE *he = timers + i + HEAP0;
1032 ev_periodic_start (EV_A_ w); 1885 ANHE_w (*he)->at += ev_rt_now - mn_now;
1033 1886 ANHE_at_cache (*he);
1034 i = 0; /* restart loop, inefficient, but time jumps should be rare */
1035 } 1887 }
1036 } 1888 }
1037 }
1038}
1039 1889
1040inline int
1041time_update_monotonic (EV_P)
1042{
1043 mn_now = get_clock ();
1044
1045 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1046 {
1047 rt_now = rtmn_diff + mn_now;
1048 return 0;
1049 }
1050 else
1051 {
1052 now_floor = mn_now;
1053 rt_now = ev_time ();
1054 return 1;
1055 }
1056}
1057
1058static void
1059time_update (EV_P)
1060{
1061 int i;
1062
1063#if EV_USE_MONOTONIC
1064 if (expect_true (have_monotonic))
1065 {
1066 if (time_update_monotonic (EV_A))
1067 {
1068 ev_tstamp odiff = rtmn_diff;
1069
1070 for (i = 4; --i; ) /* loop a few times, before making important decisions */
1071 {
1072 rtmn_diff = rt_now - mn_now;
1073
1074 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
1075 return; /* all is well */
1076
1077 rt_now = ev_time ();
1078 mn_now = get_clock ();
1079 now_floor = mn_now;
1080 }
1081
1082 periodics_reschedule (EV_A);
1083 /* no timer adjustment, as the monotonic clock doesn't jump */
1084 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1085 }
1086 }
1087 else
1088#endif
1089 {
1090 rt_now = ev_time ();
1091
1092 if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
1093 {
1094 periodics_reschedule (EV_A);
1095
1096 /* adjust timers. this is easy, as the offset is the same for all */
1097 for (i = 0; i < timercnt; ++i)
1098 ((WT)timers [i])->at += rt_now - mn_now;
1099 }
1100
1101 mn_now = rt_now; 1890 mn_now = ev_rt_now;
1102 } 1891 }
1103} 1892}
1104 1893
1105void 1894void
1106ev_ref (EV_P) 1895ev_ref (EV_P)
… …
1112ev_unref (EV_P) 1901ev_unref (EV_P)
1113{ 1902{
1114 --activecnt; 1903 --activecnt;
1115} 1904}
1116 1905
1906void
1907ev_now_update (EV_P)
1908{
1909 time_update (EV_A_ 1e100);
1910}
1911
1117static int loop_done; 1912static int loop_done;
1118 1913
1119void 1914void
1120ev_loop (EV_P_ int flags) 1915ev_loop (EV_P_ int flags)
1121{ 1916{
1122 double block; 1917 loop_done = EVUNLOOP_CANCEL;
1123 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0; 1918
1919 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1124 1920
1125 do 1921 do
1126 { 1922 {
1923#if EV_VERIFY >= 2
1924 ev_loop_verify (EV_A);
1925#endif
1926
1927#ifndef _WIN32
1928 if (expect_false (curpid)) /* penalise the forking check even more */
1929 if (expect_false (getpid () != curpid))
1930 {
1931 curpid = getpid ();
1932 postfork = 1;
1933 }
1934#endif
1935
1936#if EV_FORK_ENABLE
1937 /* we might have forked, so queue fork handlers */
1938 if (expect_false (postfork))
1939 if (forkcnt)
1940 {
1941 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1942 call_pending (EV_A);
1943 }
1944#endif
1945
1127 /* queue check watchers (and execute them) */ 1946 /* queue prepare watchers (and execute them) */
1128 if (expect_false (preparecnt)) 1947 if (expect_false (preparecnt))
1129 { 1948 {
1130 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 1949 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1131 call_pending (EV_A); 1950 call_pending (EV_A);
1132 } 1951 }
1133 1952
1953 if (expect_false (!activecnt))
1954 break;
1955
1134 /* we might have forked, so reify kernel state if necessary */ 1956 /* we might have forked, so reify kernel state if necessary */
1135 if (expect_false (postfork)) 1957 if (expect_false (postfork))
1136 loop_fork (EV_A); 1958 loop_fork (EV_A);
1137 1959
1138 /* update fd-related kernel structures */ 1960 /* update fd-related kernel structures */
1139 fd_reify (EV_A); 1961 fd_reify (EV_A);
1140 1962
1141 /* calculate blocking time */ 1963 /* calculate blocking time */
1964 {
1965 ev_tstamp waittime = 0.;
1966 ev_tstamp sleeptime = 0.;
1142 1967
1143 /* we only need this for !monotonic clockor timers, but as we basically 1968 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1144 always have timers, we just calculate it always */
1145#if EV_USE_MONOTONIC
1146 if (expect_true (have_monotonic))
1147 time_update_monotonic (EV_A);
1148 else
1149#endif
1150 { 1969 {
1151 rt_now = ev_time (); 1970 /* update time to cancel out callback processing overhead */
1152 mn_now = rt_now; 1971 time_update (EV_A_ 1e100);
1153 }
1154 1972
1155 if (flags & EVLOOP_NONBLOCK || idlecnt)
1156 block = 0.;
1157 else
1158 {
1159 block = MAX_BLOCKTIME; 1973 waittime = MAX_BLOCKTIME;
1160 1974
1161 if (timercnt) 1975 if (timercnt)
1162 { 1976 {
1163 ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge; 1977 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
1164 if (block > to) block = to; 1978 if (waittime > to) waittime = to;
1165 } 1979 }
1166 1980
1981#if EV_PERIODIC_ENABLE
1167 if (periodiccnt) 1982 if (periodiccnt)
1168 { 1983 {
1169 ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge; 1984 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1170 if (block > to) block = to; 1985 if (waittime > to) waittime = to;
1171 } 1986 }
1987#endif
1172 1988
1173 if (block < 0.) block = 0.; 1989 if (expect_false (waittime < timeout_blocktime))
1990 waittime = timeout_blocktime;
1991
1992 sleeptime = waittime - backend_fudge;
1993
1994 if (expect_true (sleeptime > io_blocktime))
1995 sleeptime = io_blocktime;
1996
1997 if (sleeptime)
1998 {
1999 ev_sleep (sleeptime);
2000 waittime -= sleeptime;
2001 }
1174 } 2002 }
1175 2003
1176 method_poll (EV_A_ block); 2004 ++loop_count;
2005 backend_poll (EV_A_ waittime);
1177 2006
1178 /* update rt_now, do magic */ 2007 /* update ev_rt_now, do magic */
1179 time_update (EV_A); 2008 time_update (EV_A_ waittime + sleeptime);
2009 }
1180 2010
1181 /* queue pending timers and reschedule them */ 2011 /* queue pending timers and reschedule them */
1182 timers_reify (EV_A); /* relative timers called last */ 2012 timers_reify (EV_A); /* relative timers called last */
2013#if EV_PERIODIC_ENABLE
1183 periodics_reify (EV_A); /* absolute timers called first */ 2014 periodics_reify (EV_A); /* absolute timers called first */
2015#endif
1184 2016
2017#if EV_IDLE_ENABLE
1185 /* queue idle watchers unless io or timers are pending */ 2018 /* queue idle watchers unless other events are pending */
1186 if (!pendingcnt) 2019 idle_reify (EV_A);
1187 queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE); 2020#endif
1188 2021
1189 /* queue check watchers, to be executed first */ 2022 /* queue check watchers, to be executed first */
1190 if (checkcnt) 2023 if (expect_false (checkcnt))
1191 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 2024 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1192 2025
1193 call_pending (EV_A); 2026 call_pending (EV_A);
1194 } 2027 }
1195 while (activecnt && !loop_done); 2028 while (expect_true (
2029 activecnt
2030 && !loop_done
2031 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2032 ));
1196 2033
1197 if (loop_done != 2) 2034 if (loop_done == EVUNLOOP_ONE)
1198 loop_done = 0; 2035 loop_done = EVUNLOOP_CANCEL;
1199} 2036}
1200 2037
1201void 2038void
1202ev_unloop (EV_P_ int how) 2039ev_unloop (EV_P_ int how)
1203{ 2040{
1204 loop_done = how; 2041 loop_done = how;
1205} 2042}
1206 2043
1207/*****************************************************************************/ 2044/*****************************************************************************/
1208 2045
1209inline void 2046void inline_size
1210wlist_add (WL *head, WL elem) 2047wlist_add (WL *head, WL elem)
1211{ 2048{
1212 elem->next = *head; 2049 elem->next = *head;
1213 *head = elem; 2050 *head = elem;
1214} 2051}
1215 2052
1216inline void 2053void inline_size
1217wlist_del (WL *head, WL elem) 2054wlist_del (WL *head, WL elem)
1218{ 2055{
1219 while (*head) 2056 while (*head)
1220 { 2057 {
1221 if (*head == elem) 2058 if (*head == elem)
… …
1226 2063
1227 head = &(*head)->next; 2064 head = &(*head)->next;
1228 } 2065 }
1229} 2066}
1230 2067
1231inline void 2068void inline_speed
1232ev_clear_pending (EV_P_ W w) 2069clear_pending (EV_P_ W w)
1233{ 2070{
1234 if (w->pending) 2071 if (w->pending)
1235 { 2072 {
1236 pendings [ABSPRI (w)][w->pending - 1].w = 0; 2073 pendings [ABSPRI (w)][w->pending - 1].w = 0;
1237 w->pending = 0; 2074 w->pending = 0;
1238 } 2075 }
1239} 2076}
1240 2077
1241inline void 2078int
2079ev_clear_pending (EV_P_ void *w)
2080{
2081 W w_ = (W)w;
2082 int pending = w_->pending;
2083
2084 if (expect_true (pending))
2085 {
2086 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2087 w_->pending = 0;
2088 p->w = 0;
2089 return p->events;
2090 }
2091 else
2092 return 0;
2093}
2094
2095void inline_size
2096pri_adjust (EV_P_ W w)
2097{
2098 int pri = w->priority;
2099 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2100 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2101 w->priority = pri;
2102}
2103
2104void inline_speed
1242ev_start (EV_P_ W w, int active) 2105ev_start (EV_P_ W w, int active)
1243{ 2106{
1244 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI; 2107 pri_adjust (EV_A_ w);
1245 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1246
1247 w->active = active; 2108 w->active = active;
1248 ev_ref (EV_A); 2109 ev_ref (EV_A);
1249} 2110}
1250 2111
1251inline void 2112void inline_size
1252ev_stop (EV_P_ W w) 2113ev_stop (EV_P_ W w)
1253{ 2114{
1254 ev_unref (EV_A); 2115 ev_unref (EV_A);
1255 w->active = 0; 2116 w->active = 0;
1256} 2117}
1257 2118
1258/*****************************************************************************/ 2119/*****************************************************************************/
1259 2120
1260void 2121void noinline
1261ev_io_start (EV_P_ struct ev_io *w) 2122ev_io_start (EV_P_ ev_io *w)
1262{ 2123{
1263 int fd = w->fd; 2124 int fd = w->fd;
1264 2125
1265 if (ev_is_active (w)) 2126 if (expect_false (ev_is_active (w)))
1266 return; 2127 return;
1267 2128
1268 assert (("ev_io_start called with negative fd", fd >= 0)); 2129 assert (("ev_io_start called with negative fd", fd >= 0));
2130 assert (("ev_io start called with illegal event mask", !(w->events & ~(EV_IOFDSET | EV_READ | EV_WRITE))));
2131
2132 EV_FREQUENT_CHECK;
1269 2133
1270 ev_start (EV_A_ (W)w, 1); 2134 ev_start (EV_A_ (W)w, 1);
1271 array_needsize (anfds, anfdmax, fd + 1, anfds_init); 2135 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
1272 wlist_add ((WL *)&anfds[fd].head, (WL)w); 2136 wlist_add (&anfds[fd].head, (WL)w);
1273 2137
1274 fd_change (EV_A_ fd); 2138 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
1275} 2139 w->events &= ~EV_IOFDSET;
1276 2140
1277void 2141 EV_FREQUENT_CHECK;
2142}
2143
2144void noinline
1278ev_io_stop (EV_P_ struct ev_io *w) 2145ev_io_stop (EV_P_ ev_io *w)
1279{ 2146{
1280 ev_clear_pending (EV_A_ (W)w); 2147 clear_pending (EV_A_ (W)w);
1281 if (!ev_is_active (w)) 2148 if (expect_false (!ev_is_active (w)))
1282 return; 2149 return;
1283 2150
2151 assert (("ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2152
2153 EV_FREQUENT_CHECK;
2154
1284 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 2155 wlist_del (&anfds[w->fd].head, (WL)w);
1285 ev_stop (EV_A_ (W)w); 2156 ev_stop (EV_A_ (W)w);
1286 2157
1287 fd_change (EV_A_ w->fd); 2158 fd_change (EV_A_ w->fd, 1);
1288}
1289 2159
1290void 2160 EV_FREQUENT_CHECK;
2161}
2162
2163void noinline
1291ev_timer_start (EV_P_ struct ev_timer *w) 2164ev_timer_start (EV_P_ ev_timer *w)
1292{ 2165{
1293 if (ev_is_active (w)) 2166 if (expect_false (ev_is_active (w)))
1294 return; 2167 return;
1295 2168
1296 ((WT)w)->at += mn_now; 2169 ev_at (w) += mn_now;
1297 2170
1298 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 2171 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1299 2172
2173 EV_FREQUENT_CHECK;
2174
2175 ++timercnt;
1300 ev_start (EV_A_ (W)w, ++timercnt); 2176 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1301 array_needsize (timers, timermax, timercnt, (void)); 2177 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1302 timers [timercnt - 1] = w; 2178 ANHE_w (timers [ev_active (w)]) = (WT)w;
1303 upheap ((WT *)timers, timercnt - 1); 2179 ANHE_at_cache (timers [ev_active (w)]);
2180 upheap (timers, ev_active (w));
1304 2181
2182 EV_FREQUENT_CHECK;
2183
1305 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 2184 /*assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1306} 2185}
1307 2186
1308void 2187void noinline
1309ev_timer_stop (EV_P_ struct ev_timer *w) 2188ev_timer_stop (EV_P_ ev_timer *w)
1310{ 2189{
1311 ev_clear_pending (EV_A_ (W)w); 2190 clear_pending (EV_A_ (W)w);
1312 if (!ev_is_active (w)) 2191 if (expect_false (!ev_is_active (w)))
1313 return; 2192 return;
1314 2193
2194 EV_FREQUENT_CHECK;
2195
2196 {
2197 int active = ev_active (w);
2198
1315 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 2199 assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
1316 2200
1317 if (((W)w)->active < timercnt--) 2201 --timercnt;
2202
2203 if (expect_true (active < timercnt + HEAP0))
1318 { 2204 {
1319 timers [((W)w)->active - 1] = timers [timercnt]; 2205 timers [active] = timers [timercnt + HEAP0];
1320 downheap ((WT *)timers, timercnt, ((W)w)->active - 1); 2206 adjustheap (timers, timercnt, active);
1321 } 2207 }
2208 }
1322 2209
1323 ((WT)w)->at = w->repeat; 2210 EV_FREQUENT_CHECK;
2211
2212 ev_at (w) -= mn_now;
1324 2213
1325 ev_stop (EV_A_ (W)w); 2214 ev_stop (EV_A_ (W)w);
1326} 2215}
1327 2216
1328void 2217void noinline
1329ev_timer_again (EV_P_ struct ev_timer *w) 2218ev_timer_again (EV_P_ ev_timer *w)
1330{ 2219{
2220 EV_FREQUENT_CHECK;
2221
1331 if (ev_is_active (w)) 2222 if (ev_is_active (w))
1332 { 2223 {
1333 if (w->repeat) 2224 if (w->repeat)
1334 { 2225 {
1335 ((WT)w)->at = mn_now + w->repeat; 2226 ev_at (w) = mn_now + w->repeat;
1336 downheap ((WT *)timers, timercnt, ((W)w)->active - 1); 2227 ANHE_at_cache (timers [ev_active (w)]);
2228 adjustheap (timers, timercnt, ev_active (w));
1337 } 2229 }
1338 else 2230 else
1339 ev_timer_stop (EV_A_ w); 2231 ev_timer_stop (EV_A_ w);
1340 } 2232 }
1341 else if (w->repeat) 2233 else if (w->repeat)
2234 {
2235 ev_at (w) = w->repeat;
1342 ev_timer_start (EV_A_ w); 2236 ev_timer_start (EV_A_ w);
1343} 2237 }
1344 2238
1345void 2239 EV_FREQUENT_CHECK;
2240}
2241
2242#if EV_PERIODIC_ENABLE
2243void noinline
1346ev_periodic_start (EV_P_ struct ev_periodic *w) 2244ev_periodic_start (EV_P_ ev_periodic *w)
1347{ 2245{
1348 if (ev_is_active (w)) 2246 if (expect_false (ev_is_active (w)))
1349 return; 2247 return;
1350 2248
2249 if (w->reschedule_cb)
2250 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2251 else if (w->interval)
2252 {
1351 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 2253 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
1352
1353 /* this formula differs from the one in periodic_reify because we do not always round up */ 2254 /* this formula differs from the one in periodic_reify because we do not always round up */
1354 if (w->interval)
1355 ((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval; 2255 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2256 }
2257 else
2258 ev_at (w) = w->offset;
1356 2259
2260 EV_FREQUENT_CHECK;
2261
2262 ++periodiccnt;
1357 ev_start (EV_A_ (W)w, ++periodiccnt); 2263 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1358 array_needsize (periodics, periodicmax, periodiccnt, (void)); 2264 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1359 periodics [periodiccnt - 1] = w; 2265 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1360 upheap ((WT *)periodics, periodiccnt - 1); 2266 ANHE_at_cache (periodics [ev_active (w)]);
2267 upheap (periodics, ev_active (w));
1361 2268
2269 EV_FREQUENT_CHECK;
2270
1362 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 2271 /*assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1363} 2272}
1364 2273
1365void 2274void noinline
1366ev_periodic_stop (EV_P_ struct ev_periodic *w) 2275ev_periodic_stop (EV_P_ ev_periodic *w)
1367{ 2276{
1368 ev_clear_pending (EV_A_ (W)w); 2277 clear_pending (EV_A_ (W)w);
1369 if (!ev_is_active (w)) 2278 if (expect_false (!ev_is_active (w)))
1370 return; 2279 return;
1371 2280
2281 EV_FREQUENT_CHECK;
2282
2283 {
2284 int active = ev_active (w);
2285
1372 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 2286 assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
1373 2287
1374 if (((W)w)->active < periodiccnt--) 2288 --periodiccnt;
2289
2290 if (expect_true (active < periodiccnt + HEAP0))
1375 { 2291 {
1376 periodics [((W)w)->active - 1] = periodics [periodiccnt]; 2292 periodics [active] = periodics [periodiccnt + HEAP0];
1377 downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1); 2293 adjustheap (periodics, periodiccnt, active);
1378 } 2294 }
2295 }
2296
2297 EV_FREQUENT_CHECK;
1379 2298
1380 ev_stop (EV_A_ (W)w); 2299 ev_stop (EV_A_ (W)w);
1381} 2300}
1382 2301
1383void 2302void noinline
1384ev_idle_start (EV_P_ struct ev_idle *w) 2303ev_periodic_again (EV_P_ ev_periodic *w)
1385{ 2304{
1386 if (ev_is_active (w)) 2305 /* TODO: use adjustheap and recalculation */
1387 return;
1388
1389 ev_start (EV_A_ (W)w, ++idlecnt);
1390 array_needsize (idles, idlemax, idlecnt, (void));
1391 idles [idlecnt - 1] = w;
1392}
1393
1394void
1395ev_idle_stop (EV_P_ struct ev_idle *w)
1396{
1397 ev_clear_pending (EV_A_ (W)w);
1398 if (ev_is_active (w))
1399 return;
1400
1401 idles [((W)w)->active - 1] = idles [--idlecnt];
1402 ev_stop (EV_A_ (W)w); 2306 ev_periodic_stop (EV_A_ w);
2307 ev_periodic_start (EV_A_ w);
1403} 2308}
1404 2309#endif
1405void
1406ev_prepare_start (EV_P_ struct ev_prepare *w)
1407{
1408 if (ev_is_active (w))
1409 return;
1410
1411 ev_start (EV_A_ (W)w, ++preparecnt);
1412 array_needsize (prepares, preparemax, preparecnt, (void));
1413 prepares [preparecnt - 1] = w;
1414}
1415
1416void
1417ev_prepare_stop (EV_P_ struct ev_prepare *w)
1418{
1419 ev_clear_pending (EV_A_ (W)w);
1420 if (ev_is_active (w))
1421 return;
1422
1423 prepares [((W)w)->active - 1] = prepares [--preparecnt];
1424 ev_stop (EV_A_ (W)w);
1425}
1426
1427void
1428ev_check_start (EV_P_ struct ev_check *w)
1429{
1430 if (ev_is_active (w))
1431 return;
1432
1433 ev_start (EV_A_ (W)w, ++checkcnt);
1434 array_needsize (checks, checkmax, checkcnt, (void));
1435 checks [checkcnt - 1] = w;
1436}
1437
1438void
1439ev_check_stop (EV_P_ struct ev_check *w)
1440{
1441 ev_clear_pending (EV_A_ (W)w);
1442 if (ev_is_active (w))
1443 return;
1444
1445 checks [((W)w)->active - 1] = checks [--checkcnt];
1446 ev_stop (EV_A_ (W)w);
1447}
1448 2310
1449#ifndef SA_RESTART 2311#ifndef SA_RESTART
1450# define SA_RESTART 0 2312# define SA_RESTART 0
1451#endif 2313#endif
1452 2314
1453void 2315void noinline
1454ev_signal_start (EV_P_ struct ev_signal *w) 2316ev_signal_start (EV_P_ ev_signal *w)
1455{ 2317{
1456#if EV_MULTIPLICITY 2318#if EV_MULTIPLICITY
1457 assert (("signal watchers are only supported in the default loop", loop == default_loop)); 2319 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1458#endif 2320#endif
1459 if (ev_is_active (w)) 2321 if (expect_false (ev_is_active (w)))
1460 return; 2322 return;
1461 2323
1462 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 2324 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1463 2325
2326 evpipe_init (EV_A);
2327
2328 EV_FREQUENT_CHECK;
2329
2330 {
2331#ifndef _WIN32
2332 sigset_t full, prev;
2333 sigfillset (&full);
2334 sigprocmask (SIG_SETMASK, &full, &prev);
2335#endif
2336
2337 array_needsize (ANSIG, signals, signalmax, w->signum, array_init_zero);
2338
2339#ifndef _WIN32
2340 sigprocmask (SIG_SETMASK, &prev, 0);
2341#endif
2342 }
2343
1464 ev_start (EV_A_ (W)w, 1); 2344 ev_start (EV_A_ (W)w, 1);
1465 array_needsize (signals, signalmax, w->signum, signals_init);
1466 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 2345 wlist_add (&signals [w->signum - 1].head, (WL)w);
1467 2346
1468 if (!((WL)w)->next) 2347 if (!((WL)w)->next)
1469 { 2348 {
1470#if WIN32 2349#if _WIN32
1471 signal (w->signum, sighandler); 2350 signal (w->signum, ev_sighandler);
1472#else 2351#else
1473 struct sigaction sa; 2352 struct sigaction sa;
1474 sa.sa_handler = sighandler; 2353 sa.sa_handler = ev_sighandler;
1475 sigfillset (&sa.sa_mask); 2354 sigfillset (&sa.sa_mask);
1476 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 2355 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1477 sigaction (w->signum, &sa, 0); 2356 sigaction (w->signum, &sa, 0);
1478#endif 2357#endif
1479 } 2358 }
1480}
1481 2359
1482void 2360 EV_FREQUENT_CHECK;
2361}
2362
2363void noinline
1483ev_signal_stop (EV_P_ struct ev_signal *w) 2364ev_signal_stop (EV_P_ ev_signal *w)
1484{ 2365{
1485 ev_clear_pending (EV_A_ (W)w); 2366 clear_pending (EV_A_ (W)w);
1486 if (!ev_is_active (w)) 2367 if (expect_false (!ev_is_active (w)))
1487 return; 2368 return;
1488 2369
2370 EV_FREQUENT_CHECK;
2371
1489 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 2372 wlist_del (&signals [w->signum - 1].head, (WL)w);
1490 ev_stop (EV_A_ (W)w); 2373 ev_stop (EV_A_ (W)w);
1491 2374
1492 if (!signals [w->signum - 1].head) 2375 if (!signals [w->signum - 1].head)
1493 signal (w->signum, SIG_DFL); 2376 signal (w->signum, SIG_DFL);
1494}
1495 2377
2378 EV_FREQUENT_CHECK;
2379}
2380
1496void 2381void
1497ev_child_start (EV_P_ struct ev_child *w) 2382ev_child_start (EV_P_ ev_child *w)
1498{ 2383{
1499#if EV_MULTIPLICITY 2384#if EV_MULTIPLICITY
1500 assert (("child watchers are only supported in the default loop", loop == default_loop)); 2385 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1501#endif 2386#endif
1502 if (ev_is_active (w)) 2387 if (expect_false (ev_is_active (w)))
1503 return; 2388 return;
1504 2389
2390 EV_FREQUENT_CHECK;
2391
1505 ev_start (EV_A_ (W)w, 1); 2392 ev_start (EV_A_ (W)w, 1);
1506 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 2393 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1507}
1508 2394
2395 EV_FREQUENT_CHECK;
2396}
2397
1509void 2398void
1510ev_child_stop (EV_P_ struct ev_child *w) 2399ev_child_stop (EV_P_ ev_child *w)
1511{ 2400{
1512 ev_clear_pending (EV_A_ (W)w); 2401 clear_pending (EV_A_ (W)w);
1513 if (ev_is_active (w)) 2402 if (expect_false (!ev_is_active (w)))
1514 return; 2403 return;
1515 2404
2405 EV_FREQUENT_CHECK;
2406
1516 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 2407 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1517 ev_stop (EV_A_ (W)w); 2408 ev_stop (EV_A_ (W)w);
2409
2410 EV_FREQUENT_CHECK;
1518} 2411}
2412
2413#if EV_STAT_ENABLE
2414
2415# ifdef _WIN32
2416# undef lstat
2417# define lstat(a,b) _stati64 (a,b)
2418# endif
2419
2420#define DEF_STAT_INTERVAL 5.0074891
2421#define MIN_STAT_INTERVAL 0.1074891
2422
2423static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2424
2425#if EV_USE_INOTIFY
2426# define EV_INOTIFY_BUFSIZE 8192
2427
2428static void noinline
2429infy_add (EV_P_ ev_stat *w)
2430{
2431 w->wd = inotify_add_watch (fs_fd, w->path, IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY | IN_DONT_FOLLOW | IN_MASK_ADD);
2432
2433 if (w->wd < 0)
2434 {
2435 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2436
2437 /* monitor some parent directory for speedup hints */
2438 /* note that exceeding the hardcoded path limit is not a correctness issue, */
2439 /* but an efficiency issue only */
2440 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2441 {
2442 char path [4096];
2443 strcpy (path, w->path);
2444
2445 do
2446 {
2447 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2448 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2449
2450 char *pend = strrchr (path, '/');
2451
2452 if (!pend)
2453 break; /* whoops, no '/', complain to your admin */
2454
2455 *pend = 0;
2456 w->wd = inotify_add_watch (fs_fd, path, mask);
2457 }
2458 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2459 }
2460 }
2461 else
2462 todo, on nfs etc., we need to poll every 60s or so
2463 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2464
2465 if (w->wd >= 0)
2466 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2467}
2468
2469static void noinline
2470infy_del (EV_P_ ev_stat *w)
2471{
2472 int slot;
2473 int wd = w->wd;
2474
2475 if (wd < 0)
2476 return;
2477
2478 w->wd = -2;
2479 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2480 wlist_del (&fs_hash [slot].head, (WL)w);
2481
2482 /* remove this watcher, if others are watching it, they will rearm */
2483 inotify_rm_watch (fs_fd, wd);
2484}
2485
2486static void noinline
2487infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2488{
2489 if (slot < 0)
2490 /* overflow, need to check for all hash slots */
2491 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2492 infy_wd (EV_A_ slot, wd, ev);
2493 else
2494 {
2495 WL w_;
2496
2497 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2498 {
2499 ev_stat *w = (ev_stat *)w_;
2500 w_ = w_->next; /* lets us remove this watcher and all before it */
2501
2502 if (w->wd == wd || wd == -1)
2503 {
2504 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2505 {
2506 w->wd = -1;
2507 infy_add (EV_A_ w); /* re-add, no matter what */
2508 }
2509
2510 stat_timer_cb (EV_A_ &w->timer, 0);
2511 }
2512 }
2513 }
2514}
2515
2516static void
2517infy_cb (EV_P_ ev_io *w, int revents)
2518{
2519 char buf [EV_INOTIFY_BUFSIZE];
2520 struct inotify_event *ev = (struct inotify_event *)buf;
2521 int ofs;
2522 int len = read (fs_fd, buf, sizeof (buf));
2523
2524 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2525 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2526}
2527
2528void inline_size
2529infy_init (EV_P)
2530{
2531 if (fs_fd != -2)
2532 return;
2533
2534 /* kernels < 2.6.25 are borked
2535 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2536 */
2537 {
2538 struct utsname buf;
2539 int major, minor, micro;
2540
2541 fs_fd = -1;
2542
2543 if (uname (&buf))
2544 return;
2545
2546 if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2547 return;
2548
2549 if (major < 2
2550 || (major == 2 && minor < 6)
2551 || (major == 2 && minor == 6 && micro < 25))
2552 return;
2553 }
2554
2555 fs_fd = inotify_init ();
2556
2557 if (fs_fd >= 0)
2558 {
2559 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2560 ev_set_priority (&fs_w, EV_MAXPRI);
2561 ev_io_start (EV_A_ &fs_w);
2562 }
2563}
2564
2565void inline_size
2566infy_fork (EV_P)
2567{
2568 int slot;
2569
2570 if (fs_fd < 0)
2571 return;
2572
2573 close (fs_fd);
2574 fs_fd = inotify_init ();
2575
2576 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2577 {
2578 WL w_ = fs_hash [slot].head;
2579 fs_hash [slot].head = 0;
2580
2581 while (w_)
2582 {
2583 ev_stat *w = (ev_stat *)w_;
2584 w_ = w_->next; /* lets us add this watcher */
2585
2586 w->wd = -1;
2587
2588 if (fs_fd >= 0)
2589 infy_add (EV_A_ w); /* re-add, no matter what */
2590 else
2591 ev_timer_start (EV_A_ &w->timer);
2592 }
2593 }
2594}
2595
2596#endif
2597
2598#ifdef _WIN32
2599# define EV_LSTAT(p,b) _stati64 (p, b)
2600#else
2601# define EV_LSTAT(p,b) lstat (p, b)
2602#endif
2603
2604void
2605ev_stat_stat (EV_P_ ev_stat *w)
2606{
2607 if (lstat (w->path, &w->attr) < 0)
2608 w->attr.st_nlink = 0;
2609 else if (!w->attr.st_nlink)
2610 w->attr.st_nlink = 1;
2611}
2612
2613static void noinline
2614stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2615{
2616 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2617
2618 /* we copy this here each the time so that */
2619 /* prev has the old value when the callback gets invoked */
2620 w->prev = w->attr;
2621 ev_stat_stat (EV_A_ w);
2622
2623 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2624 if (
2625 w->prev.st_dev != w->attr.st_dev
2626 || w->prev.st_ino != w->attr.st_ino
2627 || w->prev.st_mode != w->attr.st_mode
2628 || w->prev.st_nlink != w->attr.st_nlink
2629 || w->prev.st_uid != w->attr.st_uid
2630 || w->prev.st_gid != w->attr.st_gid
2631 || w->prev.st_rdev != w->attr.st_rdev
2632 || w->prev.st_size != w->attr.st_size
2633 || w->prev.st_atime != w->attr.st_atime
2634 || w->prev.st_mtime != w->attr.st_mtime
2635 || w->prev.st_ctime != w->attr.st_ctime
2636 ) {
2637 #if EV_USE_INOTIFY
2638 if (fs_fd >= 0)
2639 {
2640 infy_del (EV_A_ w);
2641 infy_add (EV_A_ w);
2642 ev_stat_stat (EV_A_ w); /* avoid race... */
2643 }
2644 #endif
2645
2646 ev_feed_event (EV_A_ w, EV_STAT);
2647 }
2648}
2649
2650void
2651ev_stat_start (EV_P_ ev_stat *w)
2652{
2653 if (expect_false (ev_is_active (w)))
2654 return;
2655
2656 /* since we use memcmp, we need to clear any padding data etc. */
2657 memset (&w->prev, 0, sizeof (ev_statdata));
2658 memset (&w->attr, 0, sizeof (ev_statdata));
2659
2660 ev_stat_stat (EV_A_ w);
2661
2662 if (w->interval < MIN_STAT_INTERVAL)
2663 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2664
2665 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
2666 ev_set_priority (&w->timer, ev_priority (w));
2667
2668#if EV_USE_INOTIFY
2669 infy_init (EV_A);
2670
2671 if (fs_fd >= 0)
2672 infy_add (EV_A_ w);
2673 else
2674#endif
2675 ev_timer_start (EV_A_ &w->timer);
2676
2677 ev_start (EV_A_ (W)w, 1);
2678
2679 EV_FREQUENT_CHECK;
2680}
2681
2682void
2683ev_stat_stop (EV_P_ ev_stat *w)
2684{
2685 clear_pending (EV_A_ (W)w);
2686 if (expect_false (!ev_is_active (w)))
2687 return;
2688
2689 EV_FREQUENT_CHECK;
2690
2691#if EV_USE_INOTIFY
2692 infy_del (EV_A_ w);
2693#endif
2694 ev_timer_stop (EV_A_ &w->timer);
2695
2696 ev_stop (EV_A_ (W)w);
2697
2698 EV_FREQUENT_CHECK;
2699}
2700#endif
2701
2702#if EV_IDLE_ENABLE
2703void
2704ev_idle_start (EV_P_ ev_idle *w)
2705{
2706 if (expect_false (ev_is_active (w)))
2707 return;
2708
2709 pri_adjust (EV_A_ (W)w);
2710
2711 EV_FREQUENT_CHECK;
2712
2713 {
2714 int active = ++idlecnt [ABSPRI (w)];
2715
2716 ++idleall;
2717 ev_start (EV_A_ (W)w, active);
2718
2719 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2720 idles [ABSPRI (w)][active - 1] = w;
2721 }
2722
2723 EV_FREQUENT_CHECK;
2724}
2725
2726void
2727ev_idle_stop (EV_P_ ev_idle *w)
2728{
2729 clear_pending (EV_A_ (W)w);
2730 if (expect_false (!ev_is_active (w)))
2731 return;
2732
2733 EV_FREQUENT_CHECK;
2734
2735 {
2736 int active = ev_active (w);
2737
2738 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2739 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2740
2741 ev_stop (EV_A_ (W)w);
2742 --idleall;
2743 }
2744
2745 EV_FREQUENT_CHECK;
2746}
2747#endif
2748
2749void
2750ev_prepare_start (EV_P_ ev_prepare *w)
2751{
2752 if (expect_false (ev_is_active (w)))
2753 return;
2754
2755 EV_FREQUENT_CHECK;
2756
2757 ev_start (EV_A_ (W)w, ++preparecnt);
2758 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2759 prepares [preparecnt - 1] = w;
2760
2761 EV_FREQUENT_CHECK;
2762}
2763
2764void
2765ev_prepare_stop (EV_P_ ev_prepare *w)
2766{
2767 clear_pending (EV_A_ (W)w);
2768 if (expect_false (!ev_is_active (w)))
2769 return;
2770
2771 EV_FREQUENT_CHECK;
2772
2773 {
2774 int active = ev_active (w);
2775
2776 prepares [active - 1] = prepares [--preparecnt];
2777 ev_active (prepares [active - 1]) = active;
2778 }
2779
2780 ev_stop (EV_A_ (W)w);
2781
2782 EV_FREQUENT_CHECK;
2783}
2784
2785void
2786ev_check_start (EV_P_ ev_check *w)
2787{
2788 if (expect_false (ev_is_active (w)))
2789 return;
2790
2791 EV_FREQUENT_CHECK;
2792
2793 ev_start (EV_A_ (W)w, ++checkcnt);
2794 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
2795 checks [checkcnt - 1] = w;
2796
2797 EV_FREQUENT_CHECK;
2798}
2799
2800void
2801ev_check_stop (EV_P_ ev_check *w)
2802{
2803 clear_pending (EV_A_ (W)w);
2804 if (expect_false (!ev_is_active (w)))
2805 return;
2806
2807 EV_FREQUENT_CHECK;
2808
2809 {
2810 int active = ev_active (w);
2811
2812 checks [active - 1] = checks [--checkcnt];
2813 ev_active (checks [active - 1]) = active;
2814 }
2815
2816 ev_stop (EV_A_ (W)w);
2817
2818 EV_FREQUENT_CHECK;
2819}
2820
2821#if EV_EMBED_ENABLE
2822void noinline
2823ev_embed_sweep (EV_P_ ev_embed *w)
2824{
2825 ev_loop (w->other, EVLOOP_NONBLOCK);
2826}
2827
2828static void
2829embed_io_cb (EV_P_ ev_io *io, int revents)
2830{
2831 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2832
2833 if (ev_cb (w))
2834 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2835 else
2836 ev_loop (w->other, EVLOOP_NONBLOCK);
2837}
2838
2839static void
2840embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2841{
2842 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2843
2844 {
2845 struct ev_loop *loop = w->other;
2846
2847 while (fdchangecnt)
2848 {
2849 fd_reify (EV_A);
2850 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2851 }
2852 }
2853}
2854
2855static void
2856embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
2857{
2858 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
2859
2860 {
2861 struct ev_loop *loop = w->other;
2862
2863 ev_loop_fork (EV_A);
2864 }
2865}
2866
2867#if 0
2868static void
2869embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2870{
2871 ev_idle_stop (EV_A_ idle);
2872}
2873#endif
2874
2875void
2876ev_embed_start (EV_P_ ev_embed *w)
2877{
2878 if (expect_false (ev_is_active (w)))
2879 return;
2880
2881 {
2882 struct ev_loop *loop = w->other;
2883 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2884 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2885 }
2886
2887 EV_FREQUENT_CHECK;
2888
2889 ev_set_priority (&w->io, ev_priority (w));
2890 ev_io_start (EV_A_ &w->io);
2891
2892 ev_prepare_init (&w->prepare, embed_prepare_cb);
2893 ev_set_priority (&w->prepare, EV_MINPRI);
2894 ev_prepare_start (EV_A_ &w->prepare);
2895
2896 ev_fork_init (&w->fork, embed_fork_cb);
2897 ev_fork_start (EV_A_ &w->fork);
2898
2899 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2900
2901 ev_start (EV_A_ (W)w, 1);
2902
2903 EV_FREQUENT_CHECK;
2904}
2905
2906void
2907ev_embed_stop (EV_P_ ev_embed *w)
2908{
2909 clear_pending (EV_A_ (W)w);
2910 if (expect_false (!ev_is_active (w)))
2911 return;
2912
2913 EV_FREQUENT_CHECK;
2914
2915 ev_io_stop (EV_A_ &w->io);
2916 ev_prepare_stop (EV_A_ &w->prepare);
2917 ev_fork_stop (EV_A_ &w->fork);
2918
2919 EV_FREQUENT_CHECK;
2920}
2921#endif
2922
2923#if EV_FORK_ENABLE
2924void
2925ev_fork_start (EV_P_ ev_fork *w)
2926{
2927 if (expect_false (ev_is_active (w)))
2928 return;
2929
2930 EV_FREQUENT_CHECK;
2931
2932 ev_start (EV_A_ (W)w, ++forkcnt);
2933 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2934 forks [forkcnt - 1] = w;
2935
2936 EV_FREQUENT_CHECK;
2937}
2938
2939void
2940ev_fork_stop (EV_P_ ev_fork *w)
2941{
2942 clear_pending (EV_A_ (W)w);
2943 if (expect_false (!ev_is_active (w)))
2944 return;
2945
2946 EV_FREQUENT_CHECK;
2947
2948 {
2949 int active = ev_active (w);
2950
2951 forks [active - 1] = forks [--forkcnt];
2952 ev_active (forks [active - 1]) = active;
2953 }
2954
2955 ev_stop (EV_A_ (W)w);
2956
2957 EV_FREQUENT_CHECK;
2958}
2959#endif
2960
2961#if EV_ASYNC_ENABLE
2962void
2963ev_async_start (EV_P_ ev_async *w)
2964{
2965 if (expect_false (ev_is_active (w)))
2966 return;
2967
2968 evpipe_init (EV_A);
2969
2970 EV_FREQUENT_CHECK;
2971
2972 ev_start (EV_A_ (W)w, ++asynccnt);
2973 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
2974 asyncs [asynccnt - 1] = w;
2975
2976 EV_FREQUENT_CHECK;
2977}
2978
2979void
2980ev_async_stop (EV_P_ ev_async *w)
2981{
2982 clear_pending (EV_A_ (W)w);
2983 if (expect_false (!ev_is_active (w)))
2984 return;
2985
2986 EV_FREQUENT_CHECK;
2987
2988 {
2989 int active = ev_active (w);
2990
2991 asyncs [active - 1] = asyncs [--asynccnt];
2992 ev_active (asyncs [active - 1]) = active;
2993 }
2994
2995 ev_stop (EV_A_ (W)w);
2996
2997 EV_FREQUENT_CHECK;
2998}
2999
3000void
3001ev_async_send (EV_P_ ev_async *w)
3002{
3003 w->sent = 1;
3004 evpipe_write (EV_A_ &gotasync);
3005}
3006#endif
1519 3007
1520/*****************************************************************************/ 3008/*****************************************************************************/
1521 3009
1522struct ev_once 3010struct ev_once
1523{ 3011{
1524 struct ev_io io; 3012 ev_io io;
1525 struct ev_timer to; 3013 ev_timer to;
1526 void (*cb)(int revents, void *arg); 3014 void (*cb)(int revents, void *arg);
1527 void *arg; 3015 void *arg;
1528}; 3016};
1529 3017
1530static void 3018static void
1531once_cb (EV_P_ struct ev_once *once, int revents) 3019once_cb (EV_P_ struct ev_once *once, int revents)
1532{ 3020{
1533 void (*cb)(int revents, void *arg) = once->cb; 3021 void (*cb)(int revents, void *arg) = once->cb;
1534 void *arg = once->arg; 3022 void *arg = once->arg;
1535 3023
1536 ev_io_stop (EV_A_ &once->io); 3024 ev_io_stop (EV_A_ &once->io);
1537 ev_timer_stop (EV_A_ &once->to); 3025 ev_timer_stop (EV_A_ &once->to);
1538 ev_free (once); 3026 ev_free (once);
1539 3027
1540 cb (revents, arg); 3028 cb (revents, arg);
1541} 3029}
1542 3030
1543static void 3031static void
1544once_cb_io (EV_P_ struct ev_io *w, int revents) 3032once_cb_io (EV_P_ ev_io *w, int revents)
1545{ 3033{
1546 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 3034 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3035
3036 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
1547} 3037}
1548 3038
1549static void 3039static void
1550once_cb_to (EV_P_ struct ev_timer *w, int revents) 3040once_cb_to (EV_P_ ev_timer *w, int revents)
1551{ 3041{
1552 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 3042 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
3043
3044 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
1553} 3045}
1554 3046
1555void 3047void
1556ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 3048ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1557{ 3049{
1558 struct ev_once *once = ev_malloc (sizeof (struct ev_once)); 3050 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1559 3051
1560 if (!once) 3052 if (expect_false (!once))
3053 {
1561 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 3054 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1562 else 3055 return;
1563 { 3056 }
3057
1564 once->cb = cb; 3058 once->cb = cb;
1565 once->arg = arg; 3059 once->arg = arg;
1566 3060
1567 ev_watcher_init (&once->io, once_cb_io); 3061 ev_init (&once->io, once_cb_io);
1568 if (fd >= 0) 3062 if (fd >= 0)
1569 { 3063 {
1570 ev_io_set (&once->io, fd, events); 3064 ev_io_set (&once->io, fd, events);
1571 ev_io_start (EV_A_ &once->io); 3065 ev_io_start (EV_A_ &once->io);
1572 } 3066 }
1573 3067
1574 ev_watcher_init (&once->to, once_cb_to); 3068 ev_init (&once->to, once_cb_to);
1575 if (timeout >= 0.) 3069 if (timeout >= 0.)
1576 { 3070 {
1577 ev_timer_set (&once->to, timeout, 0.); 3071 ev_timer_set (&once->to, timeout, 0.);
1578 ev_timer_start (EV_A_ &once->to); 3072 ev_timer_start (EV_A_ &once->to);
1579 }
1580 } 3073 }
1581} 3074}
1582 3075
3076#if EV_MULTIPLICITY
3077 #include "ev_wrap.h"
3078#endif
3079
3080#ifdef __cplusplus
3081}
3082#endif
3083

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