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76 | |
76 | |
77 | =cut |
77 | =cut |
78 | |
78 | |
79 | package EV; |
79 | package EV; |
80 | |
80 | |
81 | no warnings; |
81 | use common::sense; |
82 | use strict; |
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83 | |
82 | |
84 | BEGIN { |
83 | BEGIN { |
85 | our $VERSION = '3.48'; |
84 | our $VERSION = '3.7001'; |
86 | use XSLoader; |
85 | use XSLoader; |
87 | XSLoader::load "EV", $VERSION; |
86 | XSLoader::load "EV", $VERSION; |
88 | } |
87 | } |
89 | |
88 | |
90 | @EV::IO::ISA = |
89 | @EV::IO::ISA = |
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125 | will then also service the kqueue loop to some extent. See the example in |
124 | will then also service the kqueue loop to some extent. See the example in |
126 | the section about embed watchers for an example on how to achieve that. |
125 | the section about embed watchers for an example on how to achieve that. |
127 | |
126 | |
128 | =over 4 |
127 | =over 4 |
129 | |
128 | |
130 | =item $loop = new EV::loop [$flags] |
129 | =item $loop = new EV::Loop [$flags] |
131 | |
130 | |
132 | Create a new event loop as per the specified flags. Please refer to |
131 | Create a new event loop as per the specified flags. Please refer to |
133 | the C<ev_loop_new ()> function description in the libev documentation |
132 | the C<ev_loop_new ()> function description in the libev documentation |
134 | (L<http://pod.tst.eu/http://cvs.schmorp.de/libev/ev.pod#GLOBAL_FUNCTIONS>, |
133 | (L<http://pod.tst.eu/http://cvs.schmorp.de/libev/ev.pod#GLOBAL_FUNCTIONS>, |
135 | or locally-installed as F<EV::libev> manpage) for more info. |
134 | or locally-installed as F<EV::libev> manpage) for more info. |
… | |
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202 | |
201 | |
203 | Returns the time the last event loop iteration has been started. This |
202 | Returns the time the last event loop iteration has been started. This |
204 | is the time that (relative) timers are based on, and referring to it is |
203 | is the time that (relative) timers are based on, and referring to it is |
205 | usually faster then calling EV::time. |
204 | usually faster then calling EV::time. |
206 | |
205 | |
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206 | =item EV::now_update |
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207 | |
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208 | =item $loop->now_update |
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209 | |
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210 | Establishes the current time by querying the kernel, updating the time |
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211 | returned by C<EV::now> in the progress. This is a costly operation and |
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212 | is usually done automatically within C<EV::loop>. |
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213 | |
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214 | This function is rarely useful, but when some event callback runs for a |
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215 | very long time without entering the event loop, updating libev's idea of |
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216 | the current time is a good idea. |
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217 | |
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218 | =item EV::suspend |
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219 | |
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220 | =item $loop->suspend |
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221 | |
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222 | =item EV::resume |
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223 | |
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224 | =item $loop->resume |
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225 | |
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226 | These two functions suspend and resume a loop, for use when the loop is |
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227 | not used for a while and timeouts should not be processed. |
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228 | |
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229 | A typical use case would be an interactive program such as a game: When |
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230 | the user presses C<^Z> to suspend the game and resumes it an hour later it |
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231 | would be best to handle timeouts as if no time had actually passed while |
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232 | the program was suspended. This can be achieved by calling C<suspend> |
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233 | in your C<SIGTSTP> handler, sending yourself a C<SIGSTOP> and calling |
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234 | C<resume> directly afterwards to resume timer processing. |
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235 | |
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236 | Effectively, all C<timer> watchers will be delayed by the time spend |
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237 | between C<suspend> and C<resume>, and all C<periodic> watchers |
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238 | will be rescheduled (that is, they will lose any events that would have |
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239 | occured while suspended). |
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240 | |
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241 | After calling C<suspend> you B<must not> call I<any> function on the given |
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242 | loop other than C<resume>, and you B<must not> call C<resume> |
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243 | without a previous call to C<suspend>. |
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244 | |
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245 | Calling C<suspend>/C<resume> has the side effect of updating the event |
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246 | loop time (see C<now_update>). |
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247 | |
207 | =item $backend = EV::backend |
248 | =item $backend = EV::backend |
208 | |
249 | |
209 | =item $backend = $loop->backend |
250 | =item $backend = $loop->backend |
210 | |
251 | |
211 | Returns an integer describing the backend used by libev (EV::BACKEND_SELECT |
252 | Returns an integer describing the backend used by libev (EV::BACKEND_SELECT |
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289 | |
330 | |
290 | These advanced functions set the minimum block interval when polling for I/O events and the minimum |
331 | These advanced functions set the minimum block interval when polling for I/O events and the minimum |
291 | wait interval for timer events. See the libev documentation at |
332 | wait interval for timer events. See the libev documentation at |
292 | L<http://pod.tst.eu/http://cvs.schmorp.de/libev/ev.pod#FUNCTIONS_CONTROLLING_THE_EVENT_LOOP> |
333 | L<http://pod.tst.eu/http://cvs.schmorp.de/libev/ev.pod#FUNCTIONS_CONTROLLING_THE_EVENT_LOOP> |
293 | (locally installed as F<EV::libev>) for a more detailed discussion. |
334 | (locally installed as F<EV::libev>) for a more detailed discussion. |
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335 | |
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336 | =item $count = EV::pending_count |
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337 | |
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338 | =item $count = $loop->pending_count |
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339 | |
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340 | Returns the number of currently pending watchers. |
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341 | |
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342 | =item EV::invoke_pending |
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343 | |
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344 | =item $loop->invoke_pending |
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345 | |
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346 | Invoke all currently pending watchers. |
294 | |
347 | |
295 | =back |
348 | =back |
296 | |
349 | |
297 | |
350 | |
298 | =head1 WATCHER OBJECTS |
351 | =head1 WATCHER OBJECTS |
… | |
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645 | |
698 | |
646 | =item $w = EV::signal $signal, $callback |
699 | =item $w = EV::signal $signal, $callback |
647 | |
700 | |
648 | =item $w = EV::signal_ns $signal, $callback |
701 | =item $w = EV::signal_ns $signal, $callback |
649 | |
702 | |
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703 | =item $w = $loop->signal ($signal, $callback) |
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704 | |
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705 | =item $w = $loop->signal_ns ($signal, $callback) |
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706 | |
650 | Call the callback when $signal is received (the signal can be specified by |
707 | Call the callback when $signal is received (the signal can be specified by |
651 | number or by name, just as with C<kill> or C<%SIG>). |
708 | number or by name, just as with C<kill> or C<%SIG>). |
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709 | |
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710 | Only one event loop can grab a given signal - attempting to grab the same |
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711 | signal from two EV loops will crash the program immediately or cause data |
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712 | corruption. |
652 | |
713 | |
653 | EV will grab the signal for the process (the kernel only allows one |
714 | EV will grab the signal for the process (the kernel only allows one |
654 | component to receive a signal at a time) when you start a signal watcher, |
715 | component to receive a signal at a time) when you start a signal watcher, |
655 | and removes it again when you stop it. Perl does the same when you |
716 | and removes it again when you stop it. Perl does the same when you |
656 | add/remove callbacks to C<%SIG>, so watch out. |
717 | add/remove callbacks to C<%SIG>, so watch out. |
… | |
… | |
1002 | |
1063 | |
1003 | =back |
1064 | =back |
1004 | |
1065 | |
1005 | =head3 ASYNC WATCHERS - how to wake up another event loop |
1066 | =head3 ASYNC WATCHERS - how to wake up another event loop |
1006 | |
1067 | |
1007 | Async watchers are provided by EV, but have little use in perl directly, as perl |
1068 | Async watchers are provided by EV, but have little use in perl directly, |
1008 | neither supports threads nor direct access to signal handlers or other |
1069 | as perl neither supports threads running in parallel nor direct access to |
1009 | contexts where they could be of value. |
1070 | signal handlers or other contexts where they could be of value. |
1010 | |
1071 | |
1011 | It is, however, possible to use them from the XS level. |
1072 | It is, however, possible to use them from the XS level. |
1012 | |
1073 | |
1013 | Please see the libev documentation for further details. |
1074 | Please see the libev documentation for further details. |
1014 | |
1075 | |
… | |
… | |
1042 | my $async_check = EV::check sub { }; |
1103 | my $async_check = EV::check sub { }; |
1043 | |
1104 | |
1044 | This ensures that perl gets into control for a short time to handle any |
1105 | This ensures that perl gets into control for a short time to handle any |
1045 | pending signals, and also ensures (slightly) slower overall operation. |
1106 | pending signals, and also ensures (slightly) slower overall operation. |
1046 | |
1107 | |
1047 | =head1 THREADS |
1108 | =head1 ITHREADS |
1048 | |
1109 | |
1049 | Threads are not supported by this module in any way. Perl pseudo-threads |
1110 | Ithreads are not supported by this module in any way. Perl pseudo-threads |
1050 | is evil stuff and must die. As soon as Perl gains real threads I will work |
1111 | is evil stuff and must die. Real threads as provided by Coro are fully |
1051 | on thread support for it. |
1112 | supported (and enhanced support is available via L<Coro::EV>). |
1052 | |
1113 | |
1053 | =head1 FORK |
1114 | =head1 FORK |
1054 | |
1115 | |
1055 | Most of the "improved" event delivering mechanisms of modern operating |
1116 | Most of the "improved" event delivering mechanisms of modern operating |
1056 | systems have quite a few problems with fork(2) (to put it bluntly: it is |
1117 | systems have quite a few problems with fork(2) (to put it bluntly: it is |