<div dir="ltr"><div>Also, we don't have to follow the plt interface -- we can just call them thread-local-variables :)<br><br></div>-- vyzo<br></div><div class="gmail_extra"><br><div class="gmail_quote">On Sat, Mar 10, 2018 at 3:45 PM, Dimitris Vyzovitis <span dir="ltr"><<a href="mailto:vyzo@hackzen.org" target="_blank">vyzo@hackzen.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div><div><div><div><div>Marc,<br><br></div>Could we add thread-cells? <br>They can be easily implemented with a per-thread hash-table, that only gets initialized if accessed.<br><br>They are incredibly useful for per thread caches, and probably a lot of other things.<br></div><br>For instance, I have this common pattern that i see a lot:<br><br>(def errptr-cache<br> (make-hash-table-eq weak-keys: #t))<br>(def errptr-cache-mutex<br> (make-mutex))<br><br>(def (get-errptr)<br> (with-lock errptr-cache-mutex<br> (lambda ()<br> (cond<br> ((hash-get errptr-cache (current-thread))<br> => (lambda (errptr)<br> (errptr_clear errptr)<br> errptr))<br> (else<br> (let (errptr (check-ptr get-errptr (make_errptr)))<br> (hash-put! errptr-cache (current-thread) errptr)<br> errptr))))))<br><br></div>and I would like to eliminate both the lock and the weak table.<br></div></div><div><br></div><div>I can add it and make a pr, but I wanted to consult with you first.<br></div><div><br></div>-- vyzo<br></div>
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