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Comparing libev/ev.c (file contents):
Revision 1.217 by root, Sat Mar 22 13:42:45 2008 UTC vs.
Revision 1.227 by root, Fri May 2 07:20:01 2008 UTC

… …
39 39
40#ifdef __cplusplus 40#ifdef __cplusplus
41extern "C" { 41extern "C" {
42#endif 42#endif
43 43
44/* this big block deduces configuration from config.h */
44#ifndef EV_STANDALONE 45#ifndef EV_STANDALONE
45# ifdef EV_CONFIG_H 46# ifdef EV_CONFIG_H
46# include EV_CONFIG_H 47# include EV_CONFIG_H
47# else 48# else
48# include "config.h" 49# include "config.h"
… …
118# else 119# else
119# define EV_USE_INOTIFY 0 120# define EV_USE_INOTIFY 0
120# endif 121# endif
121# endif 122# endif
122 123
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
123#endif 132#endif
124 133
125#include <math.h> 134#include <math.h>
126#include <stdlib.h> 135#include <stdlib.h>
127#include <fcntl.h> 136#include <fcntl.h>
… …
152# ifndef EV_SELECT_IS_WINSOCKET 161# ifndef EV_SELECT_IS_WINSOCKET
153# define EV_SELECT_IS_WINSOCKET 1 162# define EV_SELECT_IS_WINSOCKET 1
154# endif 163# endif
155#endif 164#endif
156 165
157/**/ 166/* this block tries to deduce configuration from header-defined symbols and defaults */
158 167
159#ifndef EV_USE_MONOTONIC 168#ifndef EV_USE_MONOTONIC
160# define EV_USE_MONOTONIC 0 169# define EV_USE_MONOTONIC 0
161#endif 170#endif
162 171
… …
179# define EV_USE_POLL 1 188# define EV_USE_POLL 1
180# endif 189# endif
181#endif 190#endif
182 191
183#ifndef EV_USE_EPOLL 192#ifndef EV_USE_EPOLL
193# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
194# define EV_USE_EPOLL 1
195# else
184# define EV_USE_EPOLL 0 196# define EV_USE_EPOLL 0
197# endif
185#endif 198#endif
186 199
187#ifndef EV_USE_KQUEUE 200#ifndef EV_USE_KQUEUE
188# define EV_USE_KQUEUE 0 201# define EV_USE_KQUEUE 0
189#endif 202#endif
… …
191#ifndef EV_USE_PORT 204#ifndef EV_USE_PORT
192# define EV_USE_PORT 0 205# define EV_USE_PORT 0
193#endif 206#endif
194 207
195#ifndef EV_USE_INOTIFY 208#ifndef EV_USE_INOTIFY
209# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
210# define EV_USE_INOTIFY 1
211# else
196# define EV_USE_INOTIFY 0 212# define EV_USE_INOTIFY 0
213# endif
197#endif 214#endif
198 215
199#ifndef EV_PID_HASHSIZE 216#ifndef EV_PID_HASHSIZE
200# if EV_MINIMAL 217# if EV_MINIMAL
201# define EV_PID_HASHSIZE 1 218# define EV_PID_HASHSIZE 1
… …
210# else 227# else
211# define EV_INOTIFY_HASHSIZE 16 228# define EV_INOTIFY_HASHSIZE 16
212# endif 229# endif
213#endif 230#endif
214 231
215/**/ 232#ifndef EV_USE_EVENTFD
233# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
234# define EV_USE_EVENTFD 1
235# else
236# define EV_USE_EVENTFD 0
237# endif
238#endif
239
240/* this block fixes any misconfiguration where we know we run into trouble otherwise */
216 241
217#ifndef CLOCK_MONOTONIC 242#ifndef CLOCK_MONOTONIC
218# undef EV_USE_MONOTONIC 243# undef EV_USE_MONOTONIC
219# define EV_USE_MONOTONIC 0 244# define EV_USE_MONOTONIC 0
220#endif 245#endif
… …
239# include <sys/inotify.h> 264# include <sys/inotify.h>
240#endif 265#endif
241 266
242#if EV_SELECT_IS_WINSOCKET 267#if EV_SELECT_IS_WINSOCKET
243# include <winsock.h> 268# include <winsock.h>
269#endif
270
271#if EV_USE_EVENTFD
272/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
273# include <stdint.h>
274# ifdef __cplusplus
275extern "C" {
276# endif
277int eventfd (unsigned int initval, int flags);
278# ifdef __cplusplus
279}
280# endif
244#endif 281#endif
245 282
246/**/ 283/**/
247 284
248/* 285/*
… …
263# define expect(expr,value) __builtin_expect ((expr),(value)) 300# define expect(expr,value) __builtin_expect ((expr),(value))
264# define noinline __attribute__ ((noinline)) 301# define noinline __attribute__ ((noinline))
265#else 302#else
266# define expect(expr,value) (expr) 303# define expect(expr,value) (expr)
267# define noinline 304# define noinline
268# if __STDC_VERSION__ < 199901L 305# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
269# define inline 306# define inline
270# endif 307# endif
271#endif 308#endif
272 309
273#define expect_false(expr) expect ((expr) != 0, 0) 310#define expect_false(expr) expect ((expr) != 0, 0)
… …
323 perror (msg); 360 perror (msg);
324 abort (); 361 abort ();
325 } 362 }
326} 363}
327 364
365static void *
366ev_realloc_emul (void *ptr, long size)
367{
368 /* some systems, notably openbsd and darwin, fail to properly
369 * implement realloc (x, 0) (as required by both ansi c-98 and
370 * the single unix specification, so work around them here.
371 */
372
373 if (size)
374 return realloc (ptr, size);
375
376 free (ptr);
377 return 0;
378}
379
328static void *(*alloc)(void *ptr, long size); 380static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
329 381
330void 382void
331ev_set_allocator (void *(*cb)(void *ptr, long size)) 383ev_set_allocator (void *(*cb)(void *ptr, long size))
332{ 384{
333 alloc = cb; 385 alloc = cb;
334} 386}
335 387
336inline_speed void * 388inline_speed void *
337ev_realloc (void *ptr, long size) 389ev_realloc (void *ptr, long size)
338{ 390{
339 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 391 ptr = alloc (ptr, size);
340 392
341 if (!ptr && size) 393 if (!ptr && size)
342 { 394 {
343 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 395 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
344 abort (); 396 abort ();
… …
702 } 754 }
703} 755}
704 756
705/*****************************************************************************/ 757/*****************************************************************************/
706 758
759/* towards the root */
707void inline_speed 760void inline_speed
708upheap (WT *heap, int k) 761upheap (WT *heap, int k)
709{ 762{
710 WT w = heap [k]; 763 WT w = heap [k];
711 764
… …
723 776
724 heap [k] = w; 777 heap [k] = w;
725 ((W)heap [k])->active = k + 1; 778 ((W)heap [k])->active = k + 1;
726} 779}
727 780
781/* away from the root */
728void inline_speed 782void inline_speed
729downheap (WT *heap, int N, int k) 783downheap (WT *heap, int N, int k)
730{ 784{
731 WT w = heap [k]; 785 WT w = heap [k];
732 786
… …
802static void noinline 856static void noinline
803evpipe_init (EV_P) 857evpipe_init (EV_P)
804{ 858{
805 if (!ev_is_active (&pipeev)) 859 if (!ev_is_active (&pipeev))
806 { 860 {
861#if EV_USE_EVENTFD
862 if ((evfd = eventfd (0, 0)) >= 0)
863 {
864 evpipe [0] = -1;
865 fd_intern (evfd);
866 ev_io_set (&pipeev, evfd, EV_READ);
867 }
868 else
869#endif
870 {
807 while (pipe (evpipe)) 871 while (pipe (evpipe))
808 syserr ("(libev) error creating signal/async pipe"); 872 syserr ("(libev) error creating signal/async pipe");
809 873
810 fd_intern (evpipe [0]); 874 fd_intern (evpipe [0]);
811 fd_intern (evpipe [1]); 875 fd_intern (evpipe [1]);
812
813 ev_io_set (&pipeev, evpipe [0], EV_READ); 876 ev_io_set (&pipeev, evpipe [0], EV_READ);
877 }
878
814 ev_io_start (EV_A_ &pipeev); 879 ev_io_start (EV_A_ &pipeev);
815 ev_unref (EV_A); /* watcher should not keep loop alive */ 880 ev_unref (EV_A); /* watcher should not keep loop alive */
816 } 881 }
817} 882}
818 883
… …
822 if (!*flag) 887 if (!*flag)
823 { 888 {
824 int old_errno = errno; /* save errno because write might clobber it */ 889 int old_errno = errno; /* save errno because write might clobber it */
825 890
826 *flag = 1; 891 *flag = 1;
892
893#if EV_USE_EVENTFD
894 if (evfd >= 0)
895 {
896 uint64_t counter = 1;
897 write (evfd, &counter, sizeof (uint64_t));
898 }
899 else
900#endif
827 write (evpipe [1], &old_errno, 1); 901 write (evpipe [1], &old_errno, 1);
828 902
829 errno = old_errno; 903 errno = old_errno;
830 } 904 }
831} 905}
832 906
833static void 907static void
834pipecb (EV_P_ ev_io *iow, int revents) 908pipecb (EV_P_ ev_io *iow, int revents)
835{ 909{
910#if EV_USE_EVENTFD
911 if (evfd >= 0)
836 { 912 {
837 int dummy; 913 uint64_t counter = 1;
914 read (evfd, &counter, sizeof (uint64_t));
915 }
916 else
917#endif
918 {
919 char dummy;
838 read (evpipe [0], &dummy, 1); 920 read (evpipe [0], &dummy, 1);
839 } 921 }
840 922
841 if (gotsig && ev_is_default_loop (EV_A)) 923 if (gotsig && ev_is_default_loop (EV_A))
842 { 924 {
843 int signum; 925 int signum;
844 gotsig = 0; 926 gotsig = 0;
… …
865} 947}
866 948
867/*****************************************************************************/ 949/*****************************************************************************/
868 950
869static void 951static void
870sighandler (int signum) 952ev_sighandler (int signum)
871{ 953{
872#if EV_MULTIPLICITY 954#if EV_MULTIPLICITY
873 struct ev_loop *loop = &default_loop_struct; 955 struct ev_loop *loop = &default_loop_struct;
874#endif 956#endif
875 957
876#if _WIN32 958#if _WIN32
877 signal (signum, sighandler); 959 signal (signum, ev_sighandler);
878#endif 960#endif
879 961
880 signals [signum - 1].gotsig = 1; 962 signals [signum - 1].gotsig = 1;
881 evpipe_write (EV_A_ &gotsig); 963 evpipe_write (EV_A_ &gotsig);
882} 964}
… …
1105 if (!(flags & EVFLAG_NOENV) 1187 if (!(flags & EVFLAG_NOENV)
1106 && !enable_secure () 1188 && !enable_secure ()
1107 && getenv ("LIBEV_FLAGS")) 1189 && getenv ("LIBEV_FLAGS"))
1108 flags = atoi (getenv ("LIBEV_FLAGS")); 1190 flags = atoi (getenv ("LIBEV_FLAGS"));
1109 1191
1110 if (!(flags & 0x0000ffffUL)) 1192 if (!(flags & 0x0000ffffU))
1111 flags |= ev_recommended_backends (); 1193 flags |= ev_recommended_backends ();
1112 1194
1113#if EV_USE_PORT 1195#if EV_USE_PORT
1114 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 1196 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1115#endif 1197#endif
… …
1139 if (ev_is_active (&pipeev)) 1221 if (ev_is_active (&pipeev))
1140 { 1222 {
1141 ev_ref (EV_A); /* signal watcher */ 1223 ev_ref (EV_A); /* signal watcher */
1142 ev_io_stop (EV_A_ &pipeev); 1224 ev_io_stop (EV_A_ &pipeev);
1143 1225
1144 close (evpipe [0]); evpipe [0] = 0; 1226#if EV_USE_EVENTFD
1145 close (evpipe [1]); evpipe [1] = 0; 1227 if (evfd >= 0)
1228 close (evfd);
1229#endif
1230
1231 if (evpipe [0] >= 0)
1232 {
1233 close (evpipe [0]);
1234 close (evpipe [1]);
1235 }
1146 } 1236 }
1147 1237
1148#if EV_USE_INOTIFY 1238#if EV_USE_INOTIFY
1149 if (fs_fd >= 0) 1239 if (fs_fd >= 0)
1150 close (fs_fd); 1240 close (fs_fd);
… …
1195#endif 1285#endif
1196 1286
1197 backend = 0; 1287 backend = 0;
1198} 1288}
1199 1289
1290#if EV_USE_INOTIFY
1200void inline_size infy_fork (EV_P); 1291void inline_size infy_fork (EV_P);
1292#endif
1201 1293
1202void inline_size 1294void inline_size
1203loop_fork (EV_P) 1295loop_fork (EV_P)
1204{ 1296{
1205#if EV_USE_PORT 1297#if EV_USE_PORT
… …
1224 gotasync = 1; 1316 gotasync = 1;
1225#endif 1317#endif
1226 1318
1227 ev_ref (EV_A); 1319 ev_ref (EV_A);
1228 ev_io_stop (EV_A_ &pipeev); 1320 ev_io_stop (EV_A_ &pipeev);
1321
1322#if EV_USE_EVENTFD
1323 if (evfd >= 0)
1324 close (evfd);
1325#endif
1326
1327 if (evpipe [0] >= 0)
1328 {
1229 close (evpipe [0]); 1329 close (evpipe [0]);
1230 close (evpipe [1]); 1330 close (evpipe [1]);
1331 }
1231 1332
1232 evpipe_init (EV_A); 1333 evpipe_init (EV_A);
1233 /* now iterate over everything, in case we missed something */ 1334 /* now iterate over everything, in case we missed something */
1234 pipecb (EV_A_ &pipeev, EV_READ); 1335 pipecb (EV_A_ &pipeev, EV_READ);
1235 } 1336 }
… …
1542static int loop_done; 1643static int loop_done;
1543 1644
1544void 1645void
1545ev_loop (EV_P_ int flags) 1646ev_loop (EV_P_ int flags)
1546{ 1647{
1547 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) 1648 loop_done = EVUNLOOP_CANCEL;
1548 ? EVUNLOOP_ONE
1549 : EVUNLOOP_CANCEL;
1550 1649
1551 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */ 1650 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1552 1651
1553 do 1652 do
1554 { 1653 {
… …
1650 /* queue check watchers, to be executed first */ 1749 /* queue check watchers, to be executed first */
1651 if (expect_false (checkcnt)) 1750 if (expect_false (checkcnt))
1652 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 1751 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1653 1752
1654 call_pending (EV_A); 1753 call_pending (EV_A);
1655
1656 } 1754 }
1657 while (expect_true (activecnt && !loop_done)); 1755 while (expect_true (
1756 activecnt
1757 && !loop_done
1758 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
1759 ));
1658 1760
1659 if (loop_done == EVUNLOOP_ONE) 1761 if (loop_done == EVUNLOOP_ONE)
1660 loop_done = EVUNLOOP_CANCEL; 1762 loop_done = EVUNLOOP_CANCEL;
1661} 1763}
1662 1764
… …
1930 wlist_add (&signals [w->signum - 1].head, (WL)w); 2032 wlist_add (&signals [w->signum - 1].head, (WL)w);
1931 2033
1932 if (!((WL)w)->next) 2034 if (!((WL)w)->next)
1933 { 2035 {
1934#if _WIN32 2036#if _WIN32
1935 signal (w->signum, sighandler); 2037 signal (w->signum, ev_sighandler);
1936#else 2038#else
1937 struct sigaction sa; 2039 struct sigaction sa;
1938 sa.sa_handler = sighandler; 2040 sa.sa_handler = ev_sighandler;
1939 sigfillset (&sa.sa_mask); 2041 sigfillset (&sa.sa_mask);
1940 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 2042 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1941 sigaction (w->signum, &sa, 0); 2043 sigaction (w->signum, &sa, 0);
1942#endif 2044#endif
1943 } 2045 }

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