Implement ExtEvLoop (PECL ext-ev)#148

ivkalita · 2018-01-15T20:38:28Z

Finally I fixed my old pull request. I'm really sorry that it took so long for me.

I hope, that this feature still wanted and needed :)

WyriHaximus · 2018-01-15T20:42:27Z

Hey @kaduev13 yes your PR is still wanted, in fact the plan was to take over and finish your PR once v0.5.0 gone out. Will look into this one later today or tomorrow 👍 .

clue

@kaduev13 Thank you so much for keeping up with this and filing an update! 👍

I've found some minor issues below, otherwise LGTM 👍

clue · 2018-01-16T15:09:20Z

src/ExtEvLoop.php

+ },
+function ($signal){
+if ($this->signals->count($signal) === 0){
+ unset($this->signalEvents[$signal]);


This should probably stop() the watcher before clearing this reference, no?

Yes, it's very important to stop watcher before clearing the reference. Fixed.

clue · 2018-01-16T15:10:32Z

src/ExtEvLoop.php

+privatefunctiongetStreamListenerClosure($stream, callable$listener)
+{
+returnfunction () use ($stream, $listener){
+call_user_func($listener, $stream, $this);


The additional $loop argument has been removed via #110, so the last parameter should be omitted here.

Thank you for pointing it! I removed this argument.

clue · 2018-01-16T15:11:57Z

src/Factory.php

+ } elseif (class_exists('EvLoop', false)){
+returnnewExtEvLoop();
+ }
+elseif (class_exists('EventBase', false)){


Minor CS issue.

Fixed, thank you :)

clue · 2018-01-16T15:12:27Z

tests/AbstractLoopTest.php

 });

-$this->assertRunSlowerThan(1.5);
+$this->assertRunSlowerThan(2);


What is the motivation for this change?

I thought that there was a problem with floating point accuracy, but it was not. It should be changed to the previous 1.5 value. Fixed.

ivkalita · 2018-01-16T16:20:41Z

Also, I noticed that other loops implementations contains such code for signals callbacks:

function ($signal){$this->signalEvents[$signal] = newSignalEvent($f = function () use ($signal, &$f){$this->signals->call($signal); // Ensure there are two copies of the callable around until it has been executed.// For more information see: https://bugs.php.net/bug.php?id=62452// Only an issue for PHP 5, this hack can be removed once PHP 5 support has been dropped.$g = $f; $f = $g}, $signal); $this->loop->add($this->signalEvents[$signal])},

My question is why using the $f identifier? Why not just

function ($signal){$this->signalEvents[$signal] = newSignalEvent(function () use ($signal){$this->signals->call($signal)}, $signal); $this->loop->add($this->signalEvents[$signal])}

WyriHaximus · 2018-01-16T16:36:14Z

@kaduev13 The issue in PHP 5.x is that the callable we're calling $this->signals->call($signal); can get cleaned up by the engine while we're still in it causing odd errors. By referencing $f and juggling it again $g we ensure the engine keeps it around for after the $this->signals->call($signal);.

ivkalita · 2018-01-16T16:54:55Z

@WyriHaximus, I checked that issue, but, as I understood, this bug is about aliasing. I mean, that this code will randomly fail:

function ($signal){$this->signalEvents[$signal] = newSignalEvent($f = function () use ($signal, &$f){$this->signals->call($signal)}, $signal); $this->loop->add($this->signalEvents[$signal])}

but this one should not (no alias == no problems?):

function ($signal){$this->signalEvents[$signal] = newSignalEvent(function () use ($signal){$this->signals->call($signal)}, $signal); $this->loop->add($this->signalEvents[$signal])}

WyriHaximus · 2018-01-16T17:02:37Z

@kaduev13 feel free to prove me wrong, I don't like the solution for that bug so if we can get rid of it that would be great 👍 . Also be sure to check signal example to be sure. IIRC this is one of the failing builds for that bug: https://travis-ci.org/reactphp/event-loop/jobs/258431073#L1054

ivkalita · 2018-01-17T09:31:13Z

@WyriHaximus, thank you! Unfortunately, the build url you provided is for commit, that does not exist. I'll try to reproduce this behavior.

WyriHaximus · 2018-01-17T21:31:43Z

@kaduev13 yes correct/sorry about that the commits where squashed just before merging to keep a clean commit log.

ivkalita · 2018-01-23T19:40:31Z

@WyriHaximus sorry, I didn't have enough time to completely test the issue with lambdas. I'll continue my investigation later. I added similar workaround to ExtEvLoop to ensure that everything will work well.
@clue, I fixed issues you have pointed at, review this changes again, please :)

clue · 2018-02-06T15:39:10Z

@kaduev13 Very good point about signal handling callbacks! I've just filed #150, once this is in, this should be simplified significantly (this will likely cause a merge conflict here though).

ivkalita · 2018-02-28T17:18:58Z

@clue nice work with signals, thank you! I rebased this branch onto master, review pls =)

ExtEvLoop implements event loop based on PECL ev extension.

WyriHaximus

LGTM

clue

@kaduev13 Again, thank you so much for keeping up with this and putting the effort into keeping this updated! 👍

Only this one minor remark, otherwise I'm happy to get this in finally! 🎉

clue · 2018-04-05T20:27:37Z

src/ExtEvLoop.php

+publicfunctionisTimerActive(TimerInterface$timer)
+{
+return$this->timers->contains($timer);
+ }


This method has been removed from the public interface with #133, so this should probably be removed here.

clue · 2018-04-05T20:31:35Z

README.md


 This loop is known to work with PHP 5.4 through PHP 7+.

+#### ExtEvLoop


Should also be added to the TOC above 👍

ivkalita · 2018-04-06T15:42:57Z

@clue thank you for the review :) I fixed these issues.

clue

Awesome, thank you for the update! 🎉

WyriHaximus · 2018-04-08T17:41:36Z

Awesome, thank you 👍 !

ivkalita · 2018-04-09T08:53:30Z

Great to know that it's merged! Thank you!

WyriHaximus · 2018-04-09T12:03:05Z

@kaduev13 v0.5.1

WyriHaximus · 2018-04-16T22:28:15Z

@kaduev13 FYI I've been running it in production for a week now, as expected no issue what so ever. Well done 👍

WyriHaximus added this to the v0.5.1 milestone Jan 15, 2018

WyriHaximus requested review from WyriHaximus, clue and jsor January 15, 2018 20:40

WyriHaximus added new feature help wanted labels Jan 15, 2018

ivkalita force-pushed the ext-ev-loop branch 2 times, most recently from 405cb25 to 41018f5Compare January 15, 2018 20:48

clue requested changes Jan 16, 2018
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ivkalita force-pushed the ext-ev-loop branch 2 times, most recently from 97d946c to 8aef041Compare January 16, 2018 16:04

ivkalita force-pushed the ext-ev-loop branch from 8aef041 to 38f8cf5Compare January 23, 2018 19:35

clue changed the title ~~Implement ExtEvLoop.~~Implement ExtEvLoop (PECL ext-ev)Feb 7, 2018

clue mentioned this pull request Feb 7, 2018
PeclEvLoop: Add new PeclEvLoop (PECL ext-ev) #97
Closed

This was referenced Feb 23, 2018
Support another EventLoop backend #152
Closed
Support lib ev easily php-pm/php-pm#356
Closed

ivkalita force-pushed the ext-ev-loop branch 2 times, most recently from 12d714f to 242fc11Compare February 28, 2018 17:16

Implement ExtEvLoop.
b325a88
ExtEvLoop implements event loop based on PECL ev extension.

ivkalita force-pushed the ext-ev-loop branch from 242fc11 to b325a88Compare February 28, 2018 17:39

Fix travis: skip ev extension installation if PHP version is 5.3.
43dc6ac

ivkalita force-pushed the ext-ev-loop branch from 52bbf89 to 43dc6acCompare February 28, 2018 18:03

WyriHaximus approved these changes Apr 5, 2018
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clue reviewed Apr 5, 2018
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README.md

This loop is known to work with PHP 5.4 through PHP 7+.

#### ExtEvLoop
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clueApr 5, 2018
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Should also be added to the TOC above 👍

ivkalita added 2 commits April 6, 2018 18:28

Remove ExtEvLoop::isTimerActive.
882597b

Fix README: add ExtEvLoop to TOC.
cedf941

ivkalita force-pushed the ext-ev-loop branch from ca19b0c to cedf941Compare April 6, 2018 15:37

clue approved these changes Apr 8, 2018
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jsor approved these changes Apr 8, 2018
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WyriHaximus approved these changes Apr 8, 2018
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WyriHaximus merged commit 5511b21 into reactphp:masterApr 8, 2018

clue mentioned this pull request May 9, 2018
Bump PHP dependency from 5.3.0 to 5.4.0 #165
Closed


		This loop is known to work with PHP 5.4 through PHP 7+.

		#### ExtEvLoop

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Implement ExtEvLoop (PECL ext-ev)#148

Implement ExtEvLoop (PECL ext-ev) #148

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ivkalita commented Jan 15, 2018•
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