[ViewVC] Diff of: cvs/libev/ev.3

Comparing libev/ev.3 (file contents):
Revision 1.19 by root, Sat Nov 24 16:57:38 2007 UTC vs.
Revision 1.27 by root, Tue Nov 27 20:15:01 2007 UTC

…		…
127	.\}	127	.\}
128	.rm #[ #] #H #V #F C	128	.rm #[ #] #H #V #F C
129	.\" ========================================================================	129	.\" ========================================================================
130	.\"	130	.\"
131	.IX Title ""<STANDARD INPUT>" 1"	131	.IX Title ""<STANDARD INPUT>" 1"
132	.TH "<STANDARD INPUT>" 1 "2007-11-24" "perl v5.8.8" "User Contributed Perl Documentation"	132	.TH "<STANDARD INPUT>" 1 "2007-11-27" "perl v5.8.8" "User Contributed Perl Documentation"
133	.SH "NAME"	133	.SH "NAME"
134	libev \- a high performance full\-featured event loop written in C	134	libev \- a high performance full\-featured event loop written in C
135	.SH "SYNOPSIS"	135	.SH "SYNOPSIS"
136	.IX Header "SYNOPSIS"	136	.IX Header "SYNOPSIS"
137	.Vb 1	137	.Vb 2
		138	\& /* this is the only header you need */
138	\& #include <ev.h>	139	\& #include <ev.h>
		140	.Ve
		141	.PP
		142	.Vb 3
		143	\& /* what follows is a fully working example program */
		144	\& ev_io stdin_watcher;
		145	\& ev_timer timeout_watcher;
		146	.Ve
		147	.PP
		148	.Vb 8
		149	\& /* called when data readable on stdin */
		150	\& static void
		151	\& stdin_cb (EV_P_ struct ev_io *w, int revents)
		152	\& {
		153	\& /* puts ("stdin ready"); */
		154	\& ev_io_stop (EV_A_ w); /* just a syntax example */
		155	\& ev_unloop (EV_A_ EVUNLOOP_ALL); /* leave all loop calls */
		156	\& }
		157	.Ve
		158	.PP
		159	.Vb 6
		160	\& static void
		161	\& timeout_cb (EV_P_ struct ev_timer *w, int revents)
		162	\& {
		163	\& /* puts ("timeout"); */
		164	\& ev_unloop (EV_A_ EVUNLOOP_ONE); /* leave one loop call */
		165	\& }
		166	.Ve
		167	.PP
		168	.Vb 4
		169	\& int
		170	\& main (void)
		171	\& {
		172	\& struct ev_loop *loop = ev_default_loop (0);
		173	.Ve
		174	.PP
		175	.Vb 3
		176	\& /* initialise an io watcher, then start it */
		177	\& ev_io_init (&stdin_watcher, stdin_cb, /STDIN_FILENO/ 0, EV_READ);
		178	\& ev_io_start (loop, &stdin_watcher);
		179	.Ve
		180	.PP
		181	.Vb 3
		182	\& /* simple non-repeating 5.5 second timeout */
		183	\& ev_timer_init (&timeout_watcher, timeout_cb, 5.5, 0.);
		184	\& ev_timer_start (loop, &timeout_watcher);
		185	.Ve
		186	.PP
		187	.Vb 2
		188	\& /* loop till timeout or data ready */
		189	\& ev_loop (loop, 0);
		190	.Ve
		191	.PP
		192	.Vb 2
		193	\& return 0;
		194	\& }
139	.Ve	195	.Ve
140	.SH "DESCRIPTION"	196	.SH "DESCRIPTION"
141	.IX Header "DESCRIPTION"	197	.IX Header "DESCRIPTION"
142	Libev is an event loop: you register interest in certain events (such as a	198	Libev is an event loop: you register interest in certain events (such as a
143	file descriptor being readable or a timeout occuring), and it will manage	199	file descriptor being readable or a timeout occuring), and it will manage
…		…
240	might be supported on the current system, you would need to look at	296	might be supported on the current system, you would need to look at
241	\&\f(CW\(C`ev_embeddable_backends () & ev_supported_backends ()\(C'\fR, likewise for	297	\&\f(CW\(C`ev_embeddable_backends () & ev_supported_backends ()\(C'\fR, likewise for
242	recommended ones.	298	recommended ones.
243	.Sp	299	.Sp
244	See the description of \f(CW\(C`ev_embed\(C'\fR watchers for more info.	300	See the description of \f(CW\(C`ev_embed\(C'\fR watchers for more info.
245	.IP "ev_set_allocator (void (cb)(void *ptr, long size))" 4	301	.IP "ev_set_allocator (void (cb)(void *ptr, size_t size))" 4
246	.IX Item "ev_set_allocator (void (cb)(void *ptr, long size))"	302	.IX Item "ev_set_allocator (void (cb)(void *ptr, size_t size))"
247	Sets the allocation function to use (the prototype is similar to the	303	Sets the allocation function to use (the prototype and semantics are
248	realloc C function, the semantics are identical). It is used to allocate	304	identical to the realloc C function). It is used to allocate and free
249	and free memory (no surprises here). If it returns zero when memory	305	memory (no surprises here). If it returns zero when memory needs to be
250	needs to be allocated, the library might abort or take some potentially	306	allocated, the library might abort or take some potentially destructive
251	destructive action. The default is your system realloc function.	307	action. The default is your system realloc function.
252	.Sp	308	.Sp
253	You could override this function in high-availability programs to, say,	309	You could override this function in high-availability programs to, say,
254	free some memory if it cannot allocate memory, to use a special allocator,	310	free some memory if it cannot allocate memory, to use a special allocator,
255	or even to sleep a while and retry until some memory is available.	311	or even to sleep a while and retry until some memory is available.
256	.Sp	312	.Sp
257	Example: replace the libev allocator with one that waits a bit and then	313	Example: replace the libev allocator with one that waits a bit and then
258	retries: better than mine).	314	retries: better than mine).
259	.Sp	315	.Sp
260	.Vb 6	316	.Vb 6
261	\& static void *	317	\& static void *
262	\& persistent_realloc (void *ptr, long size)	318	\& persistent_realloc (void *ptr, size_t size)
263	\& {	319	\& {
264	\& for (;;)	320	\& for (;;)
265	\& {	321	\& {
266	\& void *newptr = realloc (ptr, size);	322	\& void *newptr = realloc (ptr, size);
267	.Ve	323	.Ve
…		…
684	The signal specified in the \f(CW\(C`ev_signal\(C'\fR watcher has been received by a thread.	740	The signal specified in the \f(CW\(C`ev_signal\(C'\fR watcher has been received by a thread.
685	.ie n .IP """EV_CHILD""" 4	741	.ie n .IP """EV_CHILD""" 4
686	.el .IP "\f(CWEV_CHILD\fR" 4	742	.el .IP "\f(CWEV_CHILD\fR" 4
687	.IX Item "EV_CHILD"	743	.IX Item "EV_CHILD"
688	The pid specified in the \f(CW\(C`ev_child\(C'\fR watcher has received a status change.	744	The pid specified in the \f(CW\(C`ev_child\(C'\fR watcher has received a status change.
		745	.ie n .IP """EV_STAT""" 4
		746	.el .IP "\f(CWEV_STAT\fR" 4
		747	.IX Item "EV_STAT"
		748	The path specified in the \f(CW\(C`ev_stat\(C'\fR watcher changed its attributes somehow.
689	.ie n .IP """EV_IDLE""" 4	749	.ie n .IP """EV_IDLE""" 4
690	.el .IP "\f(CWEV_IDLE\fR" 4	750	.el .IP "\f(CWEV_IDLE\fR" 4
691	.IX Item "EV_IDLE"	751	.IX Item "EV_IDLE"
692	The \f(CW\(C`ev_idle\(C'\fR watcher has determined that you have nothing better to do.	752	The \f(CW\(C`ev_idle\(C'\fR watcher has determined that you have nothing better to do.
693	.ie n .IP """EV_PREPARE""" 4	753	.ie n .IP """EV_PREPARE""" 4
…		…
703	\&\f(CW\(C`ev_loop\(C'\fR has gathered them, but before it invokes any callbacks for any	763	\&\f(CW\(C`ev_loop\(C'\fR has gathered them, but before it invokes any callbacks for any
704	received events. Callbacks of both watcher types can start and stop as	764	received events. Callbacks of both watcher types can start and stop as
705	many watchers as they want, and all of them will be taken into account	765	many watchers as they want, and all of them will be taken into account
706	(for example, a \f(CW\(C`ev_prepare\(C'\fR watcher might start an idle watcher to keep	766	(for example, a \f(CW\(C`ev_prepare\(C'\fR watcher might start an idle watcher to keep
707	\&\f(CW\(C`ev_loop\(C'\fR from blocking).	767	\&\f(CW\(C`ev_loop\(C'\fR from blocking).
		768	.ie n .IP """EV_EMBED""" 4
		769	.el .IP "\f(CWEV_EMBED\fR" 4
		770	.IX Item "EV_EMBED"
		771	The embedded event loop specified in the \f(CW\(C`ev_embed\(C'\fR watcher needs attention.
		772	.ie n .IP """EV_FORK""" 4
		773	.el .IP "\f(CWEV_FORK\fR" 4
		774	.IX Item "EV_FORK"
		775	The event loop has been resumed in the child process after fork (see
		776	\&\f(CW\(C`ev_fork\(C'\fR).
708	.ie n .IP """EV_ERROR""" 4	777	.ie n .IP """EV_ERROR""" 4
709	.el .IP "\f(CWEV_ERROR\fR" 4	778	.el .IP "\f(CWEV_ERROR\fR" 4
710	.IX Item "EV_ERROR"	779	.IX Item "EV_ERROR"
711	An unspecified error has occured, the watcher has been stopped. This might	780	An unspecified error has occured, the watcher has been stopped. This might
712	happen because the watcher could not be properly started because libev	781	happen because the watcher could not be properly started because libev
…		…
821	More interesting and less C\-conformant ways of catsing your callback type	890	More interesting and less C\-conformant ways of catsing your callback type
822	have been omitted....	891	have been omitted....
823	.SH "WATCHER TYPES"	892	.SH "WATCHER TYPES"
824	.IX Header "WATCHER TYPES"	893	.IX Header "WATCHER TYPES"
825	This section describes each watcher in detail, but will not repeat	894	This section describes each watcher in detail, but will not repeat
826	information given in the last section.	895	information given in the last section. Any initialisation/set macros,
		896	functions and members specific to the watcher type are explained.
		897	.PP
		898	Members are additionally marked with either \fI[read\-only]\fR, meaning that,
		899	while the watcher is active, you can look at the member and expect some
		900	sensible content, but you must not modify it (you can modify it while the
		901	watcher is stopped to your hearts content), or \fI[read\-write]\fR, which
		902	means you can expect it to have some sensible content while the watcher
		903	is active, but you can also modify it. Modifying it may not do something
		904	sensible or take immediate effect (or do anything at all), but libev will
		905	not crash or malfunction in any way.
827	.ie n .Sh """ev_io"" \- is this file descriptor readable or writable?"	906	.ie n .Sh """ev_io"" \- is this file descriptor readable or writable?"
828	.el .Sh "\f(CWev_io\fP \- is this file descriptor readable or writable?"	907	.el .Sh "\f(CWev_io\fP \- is this file descriptor readable or writable?"
829	.IX Subsection "ev_io - is this file descriptor readable or writable?"	908	.IX Subsection "ev_io - is this file descriptor readable or writable?"
830	I/O watchers check whether a file descriptor is readable or writable	909	I/O watchers check whether a file descriptor is readable or writable
831	in each iteration of the event loop, or, more precisely, when reading	910	in each iteration of the event loop, or, more precisely, when reading
…		…
871	.IX Item "ev_io_set (ev_io *, int fd, int events)"	950	.IX Item "ev_io_set (ev_io *, int fd, int events)"
872	.PD	951	.PD
873	Configures an \f(CW\(C`ev_io\(C'\fR watcher. The \f(CW\(C`fd\(C'\fR is the file descriptor to	952	Configures an \f(CW\(C`ev_io\(C'\fR watcher. The \f(CW\(C`fd\(C'\fR is the file descriptor to
874	rceeive events for and events is either \f(CW\(C`EV_READ\(C'\fR, \f(CW\(C`EV_WRITE\(C'\fR or	953	rceeive events for and events is either \f(CW\(C`EV_READ\(C'\fR, \f(CW\(C`EV_WRITE\(C'\fR or
875	\&\f(CW\(C`EV_READ \| EV_WRITE\(C'\fR to receive the given events.	954	\&\f(CW\(C`EV_READ \| EV_WRITE\(C'\fR to receive the given events.
		955	.IP "int fd [read\-only]" 4
		956	.IX Item "int fd [read-only]"
		957	The file descriptor being watched.
		958	.IP "int events [read\-only]" 4
		959	.IX Item "int events [read-only]"
		960	The events being watched.
876	.PP	961	.PP
877	Example: call \f(CW\(C`stdin_readable_cb\(C'\fR when \s-1STDIN_FILENO\s0 has become, well	962	Example: call \f(CW\(C`stdin_readable_cb\(C'\fR when \s-1STDIN_FILENO\s0 has become, well
878	readable, but only once. Since it is likely line\-buffered, you could	963	readable, but only once. Since it is likely line\-buffered, you could
879	attempt to read a whole line in the callback:	964	attempt to read a whole line in the callback:
880	.PP	965	.PP
…		…
945	.Sp	1030	.Sp
946	If the timer is repeating, either start it if necessary (with the repeat	1031	If the timer is repeating, either start it if necessary (with the repeat
947	value), or reset the running timer to the repeat value.	1032	value), or reset the running timer to the repeat value.
948	.Sp	1033	.Sp
949	This sounds a bit complicated, but here is a useful and typical	1034	This sounds a bit complicated, but here is a useful and typical
950	example: Imagine you have a tcp connection and you want a so-called idle	1035	example: Imagine you have a tcp connection and you want a so-called
951	timeout, that is, you want to be called when there have been, say, 60	1036	idle timeout, that is, you want to be called when there have been,
952	seconds of inactivity on the socket. The easiest way to do this is to	1037	say, 60 seconds of inactivity on the socket. The easiest way to do
953	configure an \f(CW\(C`ev_timer\(C'\fR with after=repeat=60 and calling ev_timer_again each	1038	this is to configure an \f(CW\(C`ev_timer\(C'\fR with \f(CW\(C`after\(C'\fR=\f(CW\(C`repeat\(C'\fR=\f(CW60\fR and calling
954	time you successfully read or write some data. If you go into an idle	1039	\&\f(CW\(C`ev_timer_again\(C'\fR each time you successfully read or write some data. If
955	state where you do not expect data to travel on the socket, you can stop	1040	you go into an idle state where you do not expect data to travel on the
956	the timer, and again will automatically restart it if need be.	1041	socket, you can stop the timer, and again will automatically restart it if
		1042	need be.
		1043	.Sp
		1044	You can also ignore the \f(CW\(C`after\(C'\fR value and \f(CW\(C`ev_timer_start\(C'\fR altogether
		1045	and only ever use the \f(CW\(C`repeat\(C'\fR value:
		1046	.Sp
		1047	.Vb 8
		1048	\& ev_timer_init (timer, callback, 0., 5.);
		1049	\& ev_timer_again (loop, timer);
		1050	\& ...
		1051	\& timer->again = 17.;
		1052	\& ev_timer_again (loop, timer);
		1053	\& ...
		1054	\& timer->again = 10.;
		1055	\& ev_timer_again (loop, timer);
		1056	.Ve
		1057	.Sp
		1058	This is more efficient then stopping/starting the timer eahc time you want
		1059	to modify its timeout value.
		1060	.IP "ev_tstamp repeat [read\-write]" 4
		1061	.IX Item "ev_tstamp repeat [read-write]"
		1062	The current \f(CW\(C`repeat\(C'\fR value. Will be used each time the watcher times out
		1063	or \f(CW\(C`ev_timer_again\(C'\fR is called and determines the next timeout (if any),
		1064	which is also when any modifications are taken into account.
957	.PP	1065	.PP
958	Example: create a timer that fires after 60 seconds.	1066	Example: create a timer that fires after 60 seconds.
959	.PP	1067	.PP
960	.Vb 5	1068	.Vb 5
961	\& static void	1069	\& static void
…		…
1093	.IX Item "ev_periodic_again (loop, ev_periodic *)"	1201	.IX Item "ev_periodic_again (loop, ev_periodic *)"
1094	Simply stops and restarts the periodic watcher again. This is only useful	1202	Simply stops and restarts the periodic watcher again. This is only useful
1095	when you changed some parameters or the reschedule callback would return	1203	when you changed some parameters or the reschedule callback would return
1096	a different time than the last time it was called (e.g. in a crond like	1204	a different time than the last time it was called (e.g. in a crond like
1097	program when the crontabs have changed).	1205	program when the crontabs have changed).
		1206	.IP "ev_tstamp interval [read\-write]" 4
		1207	.IX Item "ev_tstamp interval [read-write]"
		1208	The current interval value. Can be modified any time, but changes only
		1209	take effect when the periodic timer fires or \f(CW\(C`ev_periodic_again\(C'\fR is being
		1210	called.
		1211	.IP "ev_tstamp (reschedule_cb)(struct ev_periodic w, ev_tstamp now) [read\-write]" 4
		1212	.IX Item "ev_tstamp (reschedule_cb)(struct ev_periodic w, ev_tstamp now) [read-write]"
		1213	The current reschedule callback, or \f(CW0\fR, if this functionality is
		1214	switched off. Can be changed any time, but changes only take effect when
		1215	the periodic timer fires or \f(CW\(C`ev_periodic_again\(C'\fR is being called.
1098	.PP	1216	.PP
1099	Example: call a callback every hour, or, more precisely, whenever the	1217	Example: call a callback every hour, or, more precisely, whenever the
1100	system clock is divisible by 3600. The callback invocation times have	1218	system clock is divisible by 3600. The callback invocation times have
1101	potentially a lot of jittering, but good long-term stability.	1219	potentially a lot of jittering, but good long-term stability.
1102	.PP	1220	.PP
…		…
1160	.IP "ev_signal_set (ev_signal *, int signum)" 4	1278	.IP "ev_signal_set (ev_signal *, int signum)" 4
1161	.IX Item "ev_signal_set (ev_signal *, int signum)"	1279	.IX Item "ev_signal_set (ev_signal *, int signum)"
1162	.PD	1280	.PD
1163	Configures the watcher to trigger on the given signal number (usually one	1281	Configures the watcher to trigger on the given signal number (usually one
1164	of the \f(CW\(C`SIGxxx\(C'\fR constants).	1282	of the \f(CW\(C`SIGxxx\(C'\fR constants).
		1283	.IP "int signum [read\-only]" 4
		1284	.IX Item "int signum [read-only]"
		1285	The signal the watcher watches out for.
1165	.ie n .Sh """ev_child"" \- watch out for process status changes"	1286	.ie n .Sh """ev_child"" \- watch out for process status changes"
1166	.el .Sh "\f(CWev_child\fP \- watch out for process status changes"	1287	.el .Sh "\f(CWev_child\fP \- watch out for process status changes"
1167	.IX Subsection "ev_child - watch out for process status changes"	1288	.IX Subsection "ev_child - watch out for process status changes"
1168	Child watchers trigger when your process receives a \s-1SIGCHLD\s0 in response to	1289	Child watchers trigger when your process receives a \s-1SIGCHLD\s0 in response to
1169	some child status changes (most typically when a child of yours dies).	1290	some child status changes (most typically when a child of yours dies).
…		…
1177	\&\fIany\fR process if \f(CW\(C`pid\(C'\fR is specified as \f(CW0\fR). The callback can look	1298	\&\fIany\fR process if \f(CW\(C`pid\(C'\fR is specified as \f(CW0\fR). The callback can look
1178	at the \f(CW\(C`rstatus\(C'\fR member of the \f(CW\(C`ev_child\(C'\fR watcher structure to see	1299	at the \f(CW\(C`rstatus\(C'\fR member of the \f(CW\(C`ev_child\(C'\fR watcher structure to see
1179	the status word (use the macros from \f(CW\(C`sys/wait.h\(C'\fR and see your systems	1300	the status word (use the macros from \f(CW\(C`sys/wait.h\(C'\fR and see your systems
1180	\&\f(CW\(C`waitpid\(C'\fR documentation). The \f(CW\(C`rpid\(C'\fR member contains the pid of the	1301	\&\f(CW\(C`waitpid\(C'\fR documentation). The \f(CW\(C`rpid\(C'\fR member contains the pid of the
1181	process causing the status change.	1302	process causing the status change.
		1303	.IP "int pid [read\-only]" 4
		1304	.IX Item "int pid [read-only]"
		1305	The process id this watcher watches out for, or \f(CW0\fR, meaning any process id.
		1306	.IP "int rpid [read\-write]" 4
		1307	.IX Item "int rpid [read-write]"
		1308	The process id that detected a status change.
		1309	.IP "int rstatus [read\-write]" 4
		1310	.IX Item "int rstatus [read-write]"
		1311	The process exit/trace status caused by \f(CW\(C`rpid\(C'\fR (see your systems
		1312	\&\f(CW\(C`waitpid\(C'\fR and \f(CW\(C`sys/wait.h\(C'\fR documentation for details).
1182	.PP	1313	.PP
1183	Example: try to exit cleanly on \s-1SIGINT\s0 and \s-1SIGTERM\s0.	1314	Example: try to exit cleanly on \s-1SIGINT\s0 and \s-1SIGTERM\s0.
1184	.PP	1315	.PP
1185	.Vb 5	1316	.Vb 5
1186	\& static void	1317	\& static void
…		…
1192	.PP	1323	.PP
1193	.Vb 3	1324	.Vb 3
1194	\& struct ev_signal signal_watcher;	1325	\& struct ev_signal signal_watcher;
1195	\& ev_signal_init (&signal_watcher, sigint_cb, SIGINT);	1326	\& ev_signal_init (&signal_watcher, sigint_cb, SIGINT);
1196	\& ev_signal_start (loop, &sigint_cb);	1327	\& ev_signal_start (loop, &sigint_cb);
		1328	.Ve
		1329	.ie n .Sh """ev_stat"" \- did the file attributes just change?"
		1330	.el .Sh "\f(CWev_stat\fP \- did the file attributes just change?"
		1331	.IX Subsection "ev_stat - did the file attributes just change?"
		1332	This watches a filesystem path for attribute changes. That is, it calls
		1333	\&\f(CW\(C`stat\(C'\fR regularly (or when the \s-1OS\s0 says it changed) and sees if it changed
		1334	compared to the last time, invoking the callback if it did.
		1335	.PP
		1336	The path does not need to exist: changing from \(L"path exists\(R" to \*(L"path does
		1337	not exist\(R" is a status change like any other. The condition \(L"path does
		1338	not exist\(R" is signified by the \f(CW\(C`st_nlink\*(C'\fR field being zero (which is
		1339	otherwise always forced to be at least one) and all the other fields of
		1340	the stat buffer having unspecified contents.
		1341	.PP
		1342	Since there is no standard to do this, the portable implementation simply
		1343	calls \f(CW\(C`stat (2)\(C'\fR regulalry on the path to see if it changed somehow. You
		1344	can specify a recommended polling interval for this case. If you specify
		1345	a polling interval of \f(CW0\fR (highly recommended!) then a \fIsuitable,
		1346	unspecified default\fR value will be used (which you can expect to be around
		1347	five seconds, although this might change dynamically). Libev will also
		1348	impose a minimum interval which is currently around \f(CW0.1\fR, but thats
		1349	usually overkill.
		1350	.PP
		1351	This watcher type is not meant for massive numbers of stat watchers,
		1352	as even with OS-supported change notifications, this can be
		1353	resource\-intensive.
		1354	.PP
		1355	At the time of this writing, no specific \s-1OS\s0 backends are implemented, but
		1356	if demand increases, at least a kqueue and inotify backend will be added.
		1357	.IP "ev_stat_init (ev_stat , callback, const char path, ev_tstamp interval)" 4
		1358	.IX Item "ev_stat_init (ev_stat , callback, const char path, ev_tstamp interval)"
		1359	.PD 0
		1360	.IP "ev_stat_set (ev_stat , const char path, ev_tstamp interval)" 4
		1361	.IX Item "ev_stat_set (ev_stat , const char path, ev_tstamp interval)"
		1362	.PD
		1363	Configures the watcher to wait for status changes of the given
		1364	\&\f(CW\(C`path\(C'\fR. The \f(CW\(C`interval\(C'\fR is a hint on how quickly a change is expected to
		1365	be detected and should normally be specified as \f(CW0\fR to let libev choose
		1366	a suitable value. The memory pointed to by \f(CW\(C`path\(C'\fR must point to the same
		1367	path for as long as the watcher is active.
		1368	.Sp
		1369	The callback will be receive \f(CW\(C`EV_STAT\(C'\fR when a change was detected,
		1370	relative to the attributes at the time the watcher was started (or the
		1371	last change was detected).
		1372	.IP "ev_stat_stat (ev_stat *)" 4
		1373	.IX Item "ev_stat_stat (ev_stat *)"
		1374	Updates the stat buffer immediately with new values. If you change the
		1375	watched path in your callback, you could call this fucntion to avoid
		1376	detecting this change (while introducing a race condition). Can also be
		1377	useful simply to find out the new values.
		1378	.IP "ev_statdata attr [read\-only]" 4
		1379	.IX Item "ev_statdata attr [read-only]"
		1380	The most-recently detected attributes of the file. Although the type is of
		1381	\&\f(CW\(C`ev_statdata\(C'\fR, this is usually the (or one of the) \f(CW\(C`struct stat\(C'\fR types
		1382	suitable for your system. If the \f(CW\(C`st_nlink\(C'\fR member is \f(CW0\fR, then there
		1383	was some error while \f(CW\(C`stat\(C'\fRing the file.
		1384	.IP "ev_statdata prev [read\-only]" 4
		1385	.IX Item "ev_statdata prev [read-only]"
		1386	The previous attributes of the file. The callback gets invoked whenever
		1387	\&\f(CW\(C`prev\(C'\fR != \f(CW\(C`attr\(C'\fR.
		1388	.IP "ev_tstamp interval [read\-only]" 4
		1389	.IX Item "ev_tstamp interval [read-only]"
		1390	The specified interval.
		1391	.IP "const char *path [read\-only]" 4
		1392	.IX Item "const char *path [read-only]"
		1393	The filesystem path that is being watched.
		1394	.PP
		1395	Example: Watch \f(CW\(C`/etc/passwd\(C'\fR for attribute changes.
		1396	.PP
		1397	.Vb 15
		1398	\& static void
		1399	\& passwd_cb (struct ev_loop loop, ev_stat w, int revents)
		1400	\& {
		1401	\& /* /etc/passwd changed in some way */
		1402	\& if (w->attr.st_nlink)
		1403	\& {
		1404	\& printf ("passwd current size %ld\en", (long)w->attr.st_size);
		1405	\& printf ("passwd current atime %ld\en", (long)w->attr.st_mtime);
		1406	\& printf ("passwd current mtime %ld\en", (long)w->attr.st_mtime);
		1407	\& }
		1408	\& else
		1409	\& /* you shalt not abuse printf for puts */
		1410	\& puts ("wow, /etc/passwd is not there, expect problems. "
		1411	\& "if this is windows, they already arrived\en");
		1412	\& }
		1413	.Ve
		1414	.PP
		1415	.Vb 2
		1416	\& ...
		1417	\& ev_stat passwd;
		1418	.Ve
		1419	.PP
		1420	.Vb 2
		1421	\& ev_stat_init (&passwd, passwd_cb, "/etc/passwd");
		1422	\& ev_stat_start (loop, &passwd);
1197	.Ve	1423	.Ve
1198	.ie n .Sh """ev_idle"" \- when you've got nothing better to do..."	1424	.ie n .Sh """ev_idle"" \- when you've got nothing better to do..."
1199	.el .Sh "\f(CWev_idle\fP \- when you've got nothing better to do..."	1425	.el .Sh "\f(CWev_idle\fP \- when you've got nothing better to do..."
1200	.IX Subsection "ev_idle - when you've got nothing better to do..."	1426	.IX Subsection "ev_idle - when you've got nothing better to do..."
1201	Idle watchers trigger events when there are no other events are pending	1427	Idle watchers trigger events when there are no other events are pending
…		…
1242	.IX Subsection "ev_prepare and ev_check - customise your event loop!"	1468	.IX Subsection "ev_prepare and ev_check - customise your event loop!"
1243	Prepare and check watchers are usually (but not always) used in tandem:	1469	Prepare and check watchers are usually (but not always) used in tandem:
1244	prepare watchers get invoked before the process blocks and check watchers	1470	prepare watchers get invoked before the process blocks and check watchers
1245	afterwards.	1471	afterwards.
1246	.PP	1472	.PP
		1473	You \fImust not\fR call \f(CW\(C`ev_loop\(C'\fR or similar functions that enter
		1474	the current event loop from either \f(CW\(C`ev_prepare\(C'\fR or \f(CW\(C`ev_check\(C'\fR
		1475	watchers. Other loops than the current one are fine, however. The
		1476	rationale behind this is that you do not need to check for recursion in
		1477	those watchers, i.e. the sequence will always be \f(CW\(C`ev_prepare\(C'\fR, blocking,
		1478	\&\f(CW\(C`ev_check\(C'\fR so if you have one watcher of each kind they will always be
		1479	called in pairs bracketing the blocking call.
		1480	.PP
1247	Their main purpose is to integrate other event mechanisms into libev and	1481	Their main purpose is to integrate other event mechanisms into libev and
1248	their use is somewhat advanced. This could be used, for example, to track	1482	their use is somewhat advanced. This could be used, for example, to track
1249	variable changes, implement your own watchers, integrate net-snmp or a	1483	variable changes, implement your own watchers, integrate net-snmp or a
1250	coroutine library and lots more.	1484	coroutine library and lots more. They are also occasionally useful if
		1485	you cache some data and want to flush it before blocking (for example,
		1486	in X programs you might want to do an \f(CW\(C`XFlush ()\(C'\fR in an \f(CW\(C`ev_prepare\(C'\fR
		1487	watcher).
1251	.PP	1488	.PP
1252	This is done by examining in each prepare call which file descriptors need	1489	This is done by examining in each prepare call which file descriptors need
1253	to be watched by the other library, registering \f(CW\(C`ev_io\(C'\fR watchers for	1490	to be watched by the other library, registering \f(CW\(C`ev_io\(C'\fR watchers for
1254	them and starting an \f(CW\(C`ev_timer\(C'\fR watcher for any timeouts (many libraries	1491	them and starting an \f(CW\(C`ev_timer\(C'\fR watcher for any timeouts (many libraries
1255	provide just this functionality). Then, in the check watcher you check for	1492	provide just this functionality). Then, in the check watcher you check for
…		…
1274	.PD	1511	.PD
1275	Initialises and configures the prepare or check watcher \- they have no	1512	Initialises and configures the prepare or check watcher \- they have no
1276	parameters of any kind. There are \f(CW\(C`ev_prepare_set\(C'\fR and \f(CW\(C`ev_check_set\(C'\fR	1513	parameters of any kind. There are \f(CW\(C`ev_prepare_set\(C'\fR and \f(CW\(C`ev_check_set\(C'\fR
1277	macros, but using them is utterly, utterly and completely pointless.	1514	macros, but using them is utterly, utterly and completely pointless.
1278	.PP	1515	.PP
1279	Example: TODO.	1516	Example: To include a library such as adns, you would add \s-1IO\s0 watchers
		1517	and a timeout watcher in a prepare handler, as required by libadns, and
		1518	in a check watcher, destroy them and call into libadns. What follows is
		1519	pseudo-code only of course:
		1520	.PP
		1521	.Vb 2
		1522	\& static ev_io iow [nfd];
		1523	\& static ev_timer tw;
		1524	.Ve
		1525	.PP
		1526	.Vb 9
		1527	\& static void
		1528	\& io_cb (ev_loop loop, ev_io w, int revents)
		1529	\& {
		1530	\& // set the relevant poll flags
		1531	\& // could also call adns_processreadable etc. here
		1532	\& struct pollfd fd = (struct pollfd )w->data;
		1533	\& if (revents & EV_READ ) fd->revents \|= fd->events & POLLIN;
		1534	\& if (revents & EV_WRITE) fd->revents \|= fd->events & POLLOUT;
		1535	\& }
		1536	.Ve
		1537	.PP
		1538	.Vb 7
		1539	\& // create io watchers for each fd and a timer before blocking
		1540	\& static void
		1541	\& adns_prepare_cb (ev_loop loop, ev_prepare w, int revents)
		1542	\& {
		1543	\& int timeout = 3600000;truct pollfd fds [nfd];
		1544	\& // actual code will need to loop here and realloc etc.
		1545	\& adns_beforepoll (ads, fds, &nfd, &timeout, timeval_from (ev_time ()));
		1546	.Ve
		1547	.PP
		1548	.Vb 3
		1549	\& /* the callback is illegal, but won't be called as we stop during check */
		1550	\& ev_timer_init (&tw, 0, timeout * 1e-3);
		1551	\& ev_timer_start (loop, &tw);
		1552	.Ve
		1553	.PP
		1554	.Vb 6
		1555	\& // create on ev_io per pollfd
		1556	\& for (int i = 0; i < nfd; ++i)
		1557	\& {
		1558	\& ev_io_init (iow + i, io_cb, fds [i].fd,
		1559	\& ((fds [i].events & POLLIN ? EV_READ : 0)
		1560	\& \| (fds [i].events & POLLOUT ? EV_WRITE : 0)));
		1561	.Ve
		1562	.PP
		1563	.Vb 5
		1564	\& fds [i].revents = 0;
		1565	\& iow [i].data = fds + i;
		1566	\& ev_io_start (loop, iow + i);
		1567	\& }
		1568	\& }
		1569	.Ve
		1570	.PP
		1571	.Vb 5
		1572	\& // stop all watchers after blocking
		1573	\& static void
		1574	\& adns_check_cb (ev_loop loop, ev_check w, int revents)
		1575	\& {
		1576	\& ev_timer_stop (loop, &tw);
		1577	.Ve
		1578	.PP
		1579	.Vb 2
		1580	\& for (int i = 0; i < nfd; ++i)
		1581	\& ev_io_stop (loop, iow + i);
		1582	.Ve
		1583	.PP
		1584	.Vb 2
		1585	\& adns_afterpoll (adns, fds, nfd, timeval_from (ev_now (loop));
		1586	\& }
		1587	.Ve
1280	.ie n .Sh """ev_embed"" \- when one backend isn't enough..."	1588	.ie n .Sh """ev_embed"" \- when one backend isn't enough..."
1281	.el .Sh "\f(CWev_embed\fP \- when one backend isn't enough..."	1589	.el .Sh "\f(CWev_embed\fP \- when one backend isn't enough..."
1282	.IX Subsection "ev_embed - when one backend isn't enough..."	1590	.IX Subsection "ev_embed - when one backend isn't enough..."
1283	This is a rather advanced watcher type that lets you embed one event loop	1591	This is a rather advanced watcher type that lets you embed one event loop
1284	into another (currently only \f(CW\(C`ev_io\(C'\fR events are supported in the embedded	1592	into another (currently only \f(CW\(C`ev_io\(C'\fR events are supported in the embedded
…		…
1367	.IP "ev_embed_sweep (loop, ev_embed *)" 4	1675	.IP "ev_embed_sweep (loop, ev_embed *)" 4
1368	.IX Item "ev_embed_sweep (loop, ev_embed *)"	1676	.IX Item "ev_embed_sweep (loop, ev_embed *)"
1369	Make a single, non-blocking sweep over the embedded loop. This works	1677	Make a single, non-blocking sweep over the embedded loop. This works
1370	similarly to \f(CW\(C`ev_loop (embedded_loop, EVLOOP_NONBLOCK)\(C'\fR, but in the most	1678	similarly to \f(CW\(C`ev_loop (embedded_loop, EVLOOP_NONBLOCK)\(C'\fR, but in the most
1371	apropriate way for embedded loops.	1679	apropriate way for embedded loops.
		1680	.IP "struct ev_loop *loop [read\-only]" 4
		1681	.IX Item "struct ev_loop *loop [read-only]"
		1682	The embedded event loop.
		1683	.ie n .Sh """ev_fork"" \- the audacity to resume the event loop after a fork"
		1684	.el .Sh "\f(CWev_fork\fP \- the audacity to resume the event loop after a fork"
		1685	.IX Subsection "ev_fork - the audacity to resume the event loop after a fork"
		1686	Fork watchers are called when a \f(CW\(C`fork ()\(C'\fR was detected (usually because
		1687	whoever is a good citizen cared to tell libev about it by calling
		1688	\&\f(CW\(C`ev_default_fork\(C'\fR or \f(CW\(C`ev_loop_fork\(C'\fR). The invocation is done before the
		1689	event loop blocks next and before \f(CW\(C`ev_check\(C'\fR watchers are being called,
		1690	and only in the child after the fork. If whoever good citizen calling
		1691	\&\f(CW\(C`ev_default_fork\(C'\fR cheats and calls it in the wrong process, the fork
		1692	handlers will be invoked, too, of course.
		1693	.IP "ev_fork_init (ev_signal *, callback)" 4
		1694	.IX Item "ev_fork_init (ev_signal *, callback)"
		1695	Initialises and configures the fork watcher \- it has no parameters of any
		1696	kind. There is a \f(CW\(C`ev_fork_set\(C'\fR macro, but using it is utterly pointless,
		1697	believe me.
1372	.SH "OTHER FUNCTIONS"	1698	.SH "OTHER FUNCTIONS"
1373	.IX Header "OTHER FUNCTIONS"	1699	.IX Header "OTHER FUNCTIONS"
1374	There are some other functions of possible interest. Described. Here. Now.	1700	There are some other functions of possible interest. Described. Here. Now.
1375	.IP "ev_once (loop, int fd, int events, ev_tstamp timeout, callback)" 4	1701	.IP "ev_once (loop, int fd, int events, ev_tstamp timeout, callback)" 4
1376	.IX Item "ev_once (loop, int fd, int events, ev_tstamp timeout, callback)"	1702	.IX Item "ev_once (loop, int fd, int events, ev_tstamp timeout, callback)"
…		…
1515	\&\f(CW\(C`ev_TYPE_again\(C'\fR function.	1841	\&\f(CW\(C`ev_TYPE_again\(C'\fR function.
1516	.ie n .IP "w\->sweep () ""ev::embed"" only" 4	1842	.ie n .IP "w\->sweep () ""ev::embed"" only" 4
1517	.el .IP "w\->sweep () \f(CWev::embed\fR only" 4	1843	.el .IP "w\->sweep () \f(CWev::embed\fR only" 4
1518	.IX Item "w->sweep () ev::embed only"	1844	.IX Item "w->sweep () ev::embed only"
1519	Invokes \f(CW\(C`ev_embed_sweep\(C'\fR.	1845	Invokes \f(CW\(C`ev_embed_sweep\(C'\fR.
		1846	.ie n .IP "w\->update () ""ev::stat"" only" 4
		1847	.el .IP "w\->update () \f(CWev::stat\fR only" 4
		1848	.IX Item "w->update () ev::stat only"
		1849	Invokes \f(CW\(C`ev_stat_stat\(C'\fR.
1520	.RE	1850	.RE
1521	.RS 4	1851	.RS 4
1522	.RE	1852	.RE
1523	.PP	1853	.PP
1524	Example: Define a class with an \s-1IO\s0 and idle watcher, start one of them in	1854	Example: Define a class with an \s-1IO\s0 and idle watcher, start one of them in
…		…
1541	\& : io (this, &myclass::io_cb),	1871	\& : io (this, &myclass::io_cb),
1542	\& idle (this, &myclass::idle_cb)	1872	\& idle (this, &myclass::idle_cb)
1543	\& {	1873	\& {
1544	\& io.start (fd, ev::READ);	1874	\& io.start (fd, ev::READ);
1545	\& }	1875	\& }
		1876	.Ve
		1877	.SH "MACRO MAGIC"
		1878	.IX Header "MACRO MAGIC"
		1879	Libev can be compiled with a variety of options, the most fundemantal is
		1880	\&\f(CW\(C`EV_MULTIPLICITY\(C'\fR. This option determines wether (most) functions and
		1881	callbacks have an initial \f(CW\(C`struct ev_loop \*(C'\fR argument.
		1882	.PP
		1883	To make it easier to write programs that cope with either variant, the
		1884	following macros are defined:
		1885	.ie n .IP """EV_A""\fR, \f(CW""EV_A_""" 4
		1886	.el .IP "\f(CWEV_A\fR, \f(CWEV_A_\fR" 4
		1887	.IX Item "EV_A, EV_A_"
		1888	This provides the loop \fIargument\fR for functions, if one is required (\*(L"ev
		1889	loop argument\(R"). The \f(CW\(C`EV_A\*(C'\fR form is used when this is the sole argument,
		1890	\&\f(CW\(C`EV_A_\(C'\fR is used when other arguments are following. Example:
		1891	.Sp
		1892	.Vb 3
		1893	\& ev_unref (EV_A);
		1894	\& ev_timer_add (EV_A_ watcher);
		1895	\& ev_loop (EV_A_ 0);
		1896	.Ve
		1897	.Sp
		1898	It assumes the variable \f(CW\(C`loop\(C'\fR of type \f(CW\(C`struct ev_loop \*(C'\fR is in scope,
		1899	which is often provided by the following macro.
		1900	.ie n .IP """EV_P""\fR, \f(CW""EV_P_""" 4
		1901	.el .IP "\f(CWEV_P\fR, \f(CWEV_P_\fR" 4
		1902	.IX Item "EV_P, EV_P_"
		1903	This provides the loop \fIparameter\fR for functions, if one is required (\*(L"ev
		1904	loop parameter\(R"). The \f(CW\(C`EV_P\*(C'\fR form is used when this is the sole parameter,
		1905	\&\f(CW\(C`EV_P_\(C'\fR is used when other parameters are following. Example:
		1906	.Sp
		1907	.Vb 2
		1908	\& // this is how ev_unref is being declared
		1909	\& static void ev_unref (EV_P);
		1910	.Ve
		1911	.Sp
		1912	.Vb 2
		1913	\& // this is how you can declare your typical callback
		1914	\& static void cb (EV_P_ ev_timer *w, int revents)
		1915	.Ve
		1916	.Sp
		1917	It declares a parameter \f(CW\(C`loop\(C'\fR of type \f(CW\(C`struct ev_loop \*(C'\fR, quite
		1918	suitable for use with \f(CW\(C`EV_A\(C'\fR.
		1919	.ie n .IP """EV_DEFAULT""\fR, \f(CW""EV_DEFAULT_""" 4
		1920	.el .IP "\f(CWEV_DEFAULT\fR, \f(CWEV_DEFAULT_\fR" 4
		1921	.IX Item "EV_DEFAULT, EV_DEFAULT_"
		1922	Similar to the other two macros, this gives you the value of the default
		1923	loop, if multiple loops are supported (\(L"ev loop default\(R").
		1924	.PP
		1925	Example: Declare and initialise a check watcher, working regardless of
		1926	wether multiple loops are supported or not.
		1927	.PP
		1928	.Vb 5
		1929	\& static void
		1930	\& check_cb (EV_P_ ev_timer *w, int revents)
		1931	\& {
		1932	\& ev_check_stop (EV_A_ w);
		1933	\& }
		1934	.Ve
		1935	.PP
		1936	.Vb 4
		1937	\& ev_check check;
		1938	\& ev_check_init (&check, check_cb);
		1939	\& ev_check_start (EV_DEFAULT_ &check);
		1940	\& ev_loop (EV_DEFAULT_ 0);
1546	.Ve	1941	.Ve
1547	.SH "EMBEDDING"	1942	.SH "EMBEDDING"
1548	.IX Header "EMBEDDING"	1943	.IX Header "EMBEDDING"
1549	Libev can (and often is) directly embedded into host	1944	Libev can (and often is) directly embedded into host
1550	applications. Examples of applications that embed it include the Deliantra	1945	applications. Examples of applications that embed it include the Deliantra
…		…
1757	If undefined or defined to \f(CW1\fR, then all event-loop-specific functions	2152	If undefined or defined to \f(CW1\fR, then all event-loop-specific functions
1758	will have the \f(CW\(C`struct ev_loop \*(C'\fR as first argument, and you can create	2153	will have the \f(CW\(C`struct ev_loop \*(C'\fR as first argument, and you can create
1759	additional independent event loops. Otherwise there will be no support	2154	additional independent event loops. Otherwise there will be no support
1760	for multiple event loops and there is no first event loop pointer	2155	for multiple event loops and there is no first event loop pointer
1761	argument. Instead, all functions act on the single default loop.	2156	argument. Instead, all functions act on the single default loop.
1762	.IP "\s-1EV_PERIODICS\s0" 4	2157	.IP "\s-1EV_PERIODIC_ENABLE\s0" 4
1763	.IX Item "EV_PERIODICS"	2158	.IX Item "EV_PERIODIC_ENABLE"
1764	If undefined or defined to be \f(CW1\fR, then periodic timers are supported,	2159	If undefined or defined to be \f(CW1\fR, then periodic timers are supported. If
1765	otherwise not. This saves a few kb of code.	2160	defined to be \f(CW0\fR, then they are not. Disabling them saves a few kB of
		2161	code.
		2162	.IP "\s-1EV_EMBED_ENABLE\s0" 4
		2163	.IX Item "EV_EMBED_ENABLE"
		2164	If undefined or defined to be \f(CW1\fR, then embed watchers are supported. If
		2165	defined to be \f(CW0\fR, then they are not.
		2166	.IP "\s-1EV_STAT_ENABLE\s0" 4
		2167	.IX Item "EV_STAT_ENABLE"
		2168	If undefined or defined to be \f(CW1\fR, then stat watchers are supported. If
		2169	defined to be \f(CW0\fR, then they are not.
		2170	.IP "\s-1EV_FORK_ENABLE\s0" 4
		2171	.IX Item "EV_FORK_ENABLE"
		2172	If undefined or defined to be \f(CW1\fR, then fork watchers are supported. If
		2173	defined to be \f(CW0\fR, then they are not.
		2174	.IP "\s-1EV_MINIMAL\s0" 4
		2175	.IX Item "EV_MINIMAL"
		2176	If you need to shave off some kilobytes of code at the expense of some
		2177	speed, define this symbol to \f(CW1\fR. Currently only used for gcc to override
		2178	some inlining decisions, saves roughly 30% codesize of amd64.
		2179	.IP "\s-1EV_PID_HASHSIZE\s0" 4
		2180	.IX Item "EV_PID_HASHSIZE"
		2181	\&\f(CW\(C`ev_child\(C'\fR watchers use a small hash table to distribute workload by
		2182	pid. The default size is \f(CW16\fR (or \f(CW1\fR with \f(CW\(C`EV_MINIMAL\(C'\fR), usually more
		2183	than enough. If you need to manage thousands of children you might want to
		2184	increase this value.
1766	.IP "\s-1EV_COMMON\s0" 4	2185	.IP "\s-1EV_COMMON\s0" 4
1767	.IX Item "EV_COMMON"	2186	.IX Item "EV_COMMON"
1768	By default, all watchers have a \f(CW\(C`void data\*(C'\fR member. By redefining	2187	By default, all watchers have a \f(CW\(C`void data\*(C'\fR member. By redefining
1769	this macro to a something else you can include more and other types of	2188	this macro to a something else you can include more and other types of
1770	members. You have to define it each time you include one of the files,	2189	members. You have to define it each time you include one of the files,
…		…
1819	.Sp	2238	.Sp
1820	.Vb 2	2239	.Vb 2
1821	\& #include "ev_cpp.h"	2240	\& #include "ev_cpp.h"
1822	\& #include "ev.c"	2241	\& #include "ev.c"
1823	.Ve	2242	.Ve
		2243	.SH "COMPLEXITIES"
		2244	.IX Header "COMPLEXITIES"
		2245	In this section the complexities of (many of) the algorithms used inside
		2246	libev will be explained. For complexity discussions about backends see the
		2247	documentation for \f(CW\(C`ev_default_init\(C'\fR.
		2248	.RS 4
		2249	.IP "Starting and stopping timer/periodic watchers: O(log skipped_other_timers)" 4
		2250	.IX Item "Starting and stopping timer/periodic watchers: O(log skipped_other_timers)"
		2251	.PD 0
		2252	.IP "Changing timer/periodic watchers (by autorepeat, again): O(log skipped_other_timers)" 4
		2253	.IX Item "Changing timer/periodic watchers (by autorepeat, again): O(log skipped_other_timers)"
		2254	.IP "Starting io/check/prepare/idle/signal/child watchers: O(1)" 4
		2255	.IX Item "Starting io/check/prepare/idle/signal/child watchers: O(1)"
		2256	.IP "Stopping check/prepare/idle watchers: O(1)" 4
		2257	.IX Item "Stopping check/prepare/idle watchers: O(1)"
		2258	.IP "Stopping an io/signal/child watcher: O(number_of_watchers_for_this_(fd/signal/pid % 16))" 4
		2259	.IX Item "Stopping an io/signal/child watcher: O(number_of_watchers_for_this_(fd/signal/pid % 16))"
		2260	.IP "Finding the next timer per loop iteration: O(1)" 4
		2261	.IX Item "Finding the next timer per loop iteration: O(1)"
		2262	.IP "Each change on a file descriptor per loop iteration: O(number_of_watchers_for_this_fd)" 4
		2263	.IX Item "Each change on a file descriptor per loop iteration: O(number_of_watchers_for_this_fd)"
		2264	.IP "Activating one watcher: O(1)" 4
		2265	.IX Item "Activating one watcher: O(1)"
		2266	.RE
		2267	.RS 4
		2268	.PD
1824	.SH "AUTHOR"	2269	.SH "AUTHOR"
1825	.IX Header "AUTHOR"	2270	.IX Header "AUTHOR"
1826	Marc Lehmann <libev@schmorp.de>.	2271	Marc Lehmann <libev@schmorp.de>.

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Comparing libev/ev.3 (file contents): Revision 1.19 by root, Sat Nov 24 16:57:38 2007 UTC vs. Revision 1.27 by root, Tue Nov 27 20:15:01 2007 UTC

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Comparing libev/ev.3 (file contents):
Revision 1.19 by root, Sat Nov 24 16:57:38 2007 UTC vs.
Revision 1.27 by root, Tue Nov 27 20:15:01 2007 UTC