Re: [RFC] Fibers

From: Date: Mon, 21 Dec 2020 23:59:23 +0000
Subject: Re: [RFC] Fibers
References: 1 2  Groups: php.internals 
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Hi Mike Schinkel, > This is interesting, and potentially very useful. >  > I am curious about how you propose access to shared memory across fibers?  What will happen if > two fibers try to update a $GLOBALS variable at the same time?  Or a property of the same object?  > How will developers manage that? (I started writing this before Aaron sent a different response) [Concurrency is not parallelism](text of https://blog.golang.org/waza-talk , not the video), and this RFC isn't adding parallelism to php. Instead, the RFC is a proposal to make concurrency easier. The rfc announcement email says that "fibers exist within a single thread". A fiber would have to explicitly release control to the scheduler after modifying a $GLOBALS variable, etc. As I understand it, this proposal is similar to how concurrency works in node for code written in JS - https://stackoverflow.com/questions/29977049/how-does-concurrency-work-in-nodejs (in that there's only one thread, but it's different in that scheduling is done manually) Thanks, - Tyson

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