{"id":160720,"date":"2026-02-12T17:11:59","date_gmt":"2026-02-12T15:11:59","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/v-yazyke-nim-predstavlen-yrc-potokobezopasnyj-sborshhik-cziklicheskih-ssylok"},"modified":"2026-02-12T17:11:59","modified_gmt":"2026-02-12T15:11:59","slug":"v-yazyke-nim-predstavlen-yrc-potokobezopasnyj-sborshhik-cziklicheskih-ssylok","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hu\/blog\/news\/v-yazyke-nim-predstavlen-yrc-potokobezopasnyj-sborshhik-cziklicheskih-ssylok","title":{"rendered":"A Nim nyelvben bemutatkozott az YRC \u2014 sz\u00e1lbiztos ciklikus hivatkoz\u00e1sgy\u0171jt\u0151.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Andreas Rumpf (Araq), a szerverprogramoz\u00e1si nyelv, a Nim szerz\u0151je, bejelentette az \u00faj mem\u00f3riakezel\u0151 algoritmust, a YRC-t (kiejtve '\u00dcrk'), amely megoldja a megl\u00e9v\u0151 Nim mechanizmusok egyik f\u0151 probl\u00e9m\u00e1j\u00e1t: a sz\u00e1lhat\u00e1rokon \u00e1tny\u00fal\u00f3 ciklikus hivatkoz\u00e1sok helyes kezel\u00e9s\u00e9nek lehetetlens\u00e9ge.    <\/p>\n<p>A YRC megjelen\u00e9s\u00e9ig a Nim \u00e1ltal javasolt mem\u00f3riakezel\u0151 algoritmusok a k\u00f6vetkez\u0151 korl\u00e1toz\u00e1sokkal rendelkeztek: az ARC - nem t\u00e1mogatta a t\u00f6bb sz\u00e1lat, \u00e9s nem kezelte a ciklusokat; az Atomic ARC - sz\u00e1lbiztos volt, de nem kezelte a ciklikus hivatkoz\u00e1sokat; az ORC - kezeli a ciklikus hivatkoz\u00e1sokat, de ezt csak egy sz\u00e1lon bel\u00fcl tudta helyesen megtenni (a sz\u00e1lak k\u00f6z\u00f6tti k\u00f6z\u00f6s hivatkoz\u00e1sok eset\u00e9n mem\u00f3ria sziv\u00e1rg\u00e1sok l\u00e9ptek fel).       <\/p>\n<p>A javasolt YRC egyes\u00edti a sz\u00e1lbiztons\u00e1got \u00e9s a ciklusok kezel\u00e9s\u00e9t a sz\u00e1lak k\u00f6z\u00f6tt, kombin\u00e1lt megk\u00f6zel\u00edt\u00e9s alkalmaz\u00e1s\u00e1val: az aciklikus adatokhoz atomikus hivatkoz\u00e1s-sz\u00e1m\u00edt\u00e1st alkalmaznak, m\u00edg a ciklikus hivatkoz\u00e1sokhoz \u00edr\u00e1si akad\u00e1lyt (write barrier) haszn\u00e1lnak, amely csak a pointerek hozz\u00e1rendel\u00e9sekor aktiv\u00e1l\u00f3dik. A javasolt megval\u00f3s\u00edt\u00e1sban: a gy\u0171jt\u0151 t\u00e9nyleges sz\u00fcks\u00e9g alapj\u00e1n indul (nincsenek stop-the-world sz\u00fcnetek); a gy\u00f6k\u00e9r RC objektumok kifejezetten meghat\u00e1rozottak \u00e9s egyszer egyes\u00edtettek (nincs sz\u00fcks\u00e9g a sz\u00e1lak verem\u00e9nek \u00e1tvizsg\u00e1l\u00e1s\u00e1ra); elker\u00fclik a t\u00f6bb sz\u00e1l\u00fa megsz\u00fcntet\u00e9st iter\u00e1ci\u00f3 k\u00f6zben (nincs glob\u00e1lis \u00e1tvizsg\u00e1l\u00e1si f\u00e1zis); a mut\u00e1torok szabadon olvass\u00e1k az adatokat; b\u00e1rmely sz\u00e1l elind\u00edthatja a szem\u00e9tszed\u0151t sz\u00fcks\u00e9g eset\u00e9n (nincs dedik\u00e1lt GC sz\u00e1l).    <\/p>\n<p>A YRC teljes k\u00f6r\u0171 inform\u00e1ci\u00f3t haszn\u00e1l az incRef\/decRef esem\u00e9nyekr\u0151l, amelyeket a hagyom\u00e1nyos nyomk\u00f6vet\u0151 szem\u00e9tgy\u0171jt\u0151k (tracing GC) eldobnak, majd helyre kell \u00e1ll\u00edtaniuk a verem \u00e1tvizsg\u00e1l\u00e1s\u00e1val \u00e9s a gr\u00e1f bej\u00e1r\u00e1s\u00e1val. A megval\u00f3s\u00edt\u00e1s mind\u00f6ssze 550 k\u00f3dsorb\u00f3l \u00e1ll, \u00e9s form\u00e1lis biztons\u00e1g-ellen\u0151rz\u00e9se van, valamint holtblokkok n\u00e9lk\u00fcli verifik\u00e1ci\u00f3t k\u00edn\u00e1l a TLA+ nyelven k\u00e9sz\u00fclt specifik\u00e1ci\u00f3 \u00e9s a Lean eszk\u00f6zkeretrendszeren kereszt\u00fcl. A YRC-t 'majdnem az utols\u00f3 hivatkoz\u00e1s-sz\u00e1m\u00edt\u00e1son alapul\u00f3 ciklusgy\u0171jt\u0151k\u00e9nt' pozicion\u00e1lj\u00e1k (az Y bet\u0171 megel\u0151zi a Z-t az \u00e1b\u00e9c\u00e9ben), \u00e9s a legk\u00f6nnyebben haszn\u00e1lhat\u00f3 sz\u00e1lbiztos szem\u00e9tgy\u0171jt\u0151nek is tekintik - a szerz\u0151 \u00e1ll\u00edt\u00e1sa szerint nem ig\u00e9nyel t\u00f6bb bonyolult mechanizmust, amelyek a hagyom\u00e1nyos nyomk\u00f6vet\u0151 szem\u00e9tgy\u0171jt\u0151kre jellemz\u0151ek.      <\/p>\n<p>A YRC ugyanazt az API-t k\u00edn\u00e1lja, mint az ORC, destrukt\u0151r\u00f6k v\u00e9grehajt\u00e1s\u00e1val a szem\u00e9tgy\u0171jt\u00e9s sor\u00e1n. A gy\u0171jt\u0151 csak azokat az objektumok alh\u00e1l\u00f3zatait kezeli, amelyekkel a sz\u00e1lak dolgoznak, an\u00e9lk\u00fcl, hogy meg\u00e9rinten\u00e9 a kapcsol\u00f3datlan adatstrukt\u00far\u00e1kat (el\u0151zm\u00e9nyek, hossz\u00fa \u00e9let\u0171 objektumok) \u2014 megk\u00f6zel\u00edt\u00e9s, amely hasonl\u00f3 a \u201et\u00f6k\u00e9letes\u201d gener\u00e1ci\u00f3s szem\u00e9tgy\u0171jt\u0151h\u00f6z gener\u00e1ci\u00f3k haszn\u00e1lata n\u00e9lk\u00fcl. Az alapvet\u0151 h\u00e1tr\u00e1ny a teljes\u00edtm\u00e9ny: a YRC 1,5-2,0-szeres lassul\u00e1st mutat az ORC-hez k\u00e9pest az orcbench teljes\u00edtm\u00e9nyteszt sor\u00e1n. A szerz\u0151 ezt a ciklikus hivatkoz\u00e1sok teljes sz\u00e1lbiztons\u00e1g\u00fa kezel\u00e9se\u00e9rt elfogadhat\u00f3 \u00e1rat tartja.    <\/p>\n<p>A YRC m\u00e1r el\u00e9rhet\u0151 a Nim fejleszt\u00e9si verzi\u00f3j\u00e1ban, \u00e9s az &#171;&#8212;mm:yrc&#187; kapcsol\u00f3val aktiv\u00e1lhat\u00f3. A szerz\u0151 azonban k\u00e9s\u0151bbi \u00fczenetekben elismerte, hogy az eredeti megval\u00f3s\u00edt\u00e1s s\u00falyos hib\u00e1kat tartalmazott, \u00e9s nem gy\u0171jt\u00f6tte \u00f6ssze a ciklusokat helyesen. A publik\u00e1ci\u00f3 id\u0151pontj\u00e1ban egy hibajav\u00edt\u00f3 k\u00e9szlet k\u00e9sz\u00fclt, amely orvosolja a legfontosabb hib\u00e1kat. A szerz\u0151 folytatja a gy\u0171jt\u00e9si heurisztik\u00e1k finom\u00edt\u00e1s\u00e1t \u00e9s a fennmarad\u00f3 hib\u00e1k kijav\u00edt\u00e1s\u00e1t, mik\u00f6zben az alap algoritmus \u00e9s annak form\u00e1lis ellen\u0151rz\u00e9se tov\u00e1bbra is helyes marad.<br \/>\n<br \/>Forr\u00e1s: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=64785\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0410\u043d\u0434\u0440\u0435\u0430\u0441 \u0420\u0443\u043c\u043f\u0444 (Araq), \u0430\u0432\u0442\u043e\u0440 \u044f\u0437\u044b\u043a\u0430 \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f Nim, \u0430\u043d\u043e\u043d\u0441\u0438\u0440\u043e\u0432\u0430\u043b \u043d\u043e\u0432\u044b\u0439 \u0430\u043b\u0433\u043e\u0440\u0438\u0442\u043c \u0443\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u044f \u043f\u0430\u043c\u044f\u0442\u044c\u044e YRC (\u043f\u0440\u043e\u0438\u0437\u043d\u043e\u0441\u0438\u0442\u0441\u044f &#171;&#220;rk&#187;), \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u0440\u0435\u0448\u0430\u0435\u0442 \u043e\u0434\u043d\u0443 \u0438\u0437 \u043a\u043b\u044e\u0447\u0435\u0432\u044b\u0445 \u043f\u0440\u043e\u0431\u043b\u0435\u043c \u0441\u0443\u0449\u0435\u0441\u0442\u0432\u0443\u044e\u0449\u0438\u0445 \u043c\u0435\u0445\u0430\u043d\u0438\u0437\u043c\u043e\u0432 \u0432 Nim: \u043d\u0435\u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u044c \u043a\u043e\u0440\u0440\u0435\u043a\u0442\u043d\u043e\u0439 \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u0446\u0438\u043a\u043b\u0438\u0447\u0435\u0441\u043a\u0438\u0445 \u0441\u0441\u044b\u043b\u043e\u043a, \u043f\u0435\u0440\u0435\u0441\u0435\u043a\u0430\u044e\u0449\u0438\u0445 \u0433\u0440\u0430\u043d\u0438\u0446\u044b \u043f\u043e\u0442\u043e\u043a\u043e\u0432. \u0414\u043e \u043f\u043e\u044f\u0432\u043b\u0435\u043d\u0438\u044f YRC \u0432 \u043f\u0440\u0435\u0434\u043b\u0430\u0433\u0430\u0432\u0448\u0438\u0445\u0441\u044f \u0432 Nim \u0430\u043b\u0433\u043e\u0440\u0438\u0442\u043c\u0430\u0445 \u0443\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u044f \u043f\u0430\u043c\u044f\u0442\u044c\u044e, \u0438\u043c\u0435\u043b\u0438\u0441\u044c \u0441\u043b\u0435\u0434\u0443\u044e\u0449\u0438\u0435 \u043e\u0433\u0440\u0430\u043d\u0438\u0447\u0435\u043d\u0438\u044f: ARC &#8212; \u043d\u0435 \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u0438\u0432\u0430\u043b \u043d\u0438 \u043c\u043d\u043e\u0433\u043e\u043f\u043e\u0442\u043e\u0447\u043d\u043e\u0441\u0442\u044c, \u043d\u0438 \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u0443 \u0446\u0438\u043a\u043b\u043e\u0432; [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":8,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-160720","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0410\u043d\u0434\u0440\u0435\u0430\u0441 \u0420\u0443\u043c\u043f\u0444 (Araq), \u0430\u0432\u0442\u043e\u0440 \u044f\u0437\u044b\u043a\u0430 \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f Nim, \u0430\u043d\u043e\u043d\u0441\u0438\u0440\u043e\u0432\u0430\u043b \u043d\u043e\u0432\u044b\u0439 \u0430\u043b\u0433\u043e\u0440\u0438\u0442\u043c \u0443\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u044f \u043f\u0430\u043c\u044f\u0442\u044c\u044e 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content=\"https:\/\/prohoster.info\/hu\/blog\/news\/v-yazyke-nim-predstavlen-yrc-potokobezopasnyj-sborshhik-cziklicheskih-ssylok\" \/>\n\t\t<meta property=\"og:image\" content=\"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg\" \/>\n\t\t<meta property=\"og:image:secure_url\" content=\"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg\" \/>\n\t\t<meta property=\"og:image:width\" content=\"350\" \/>\n\t\t<meta property=\"og:image:height\" content=\"350\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2026-02-12T15:11:59+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2026-02-12T15:11:59+00:00\" \/>\n\t\t<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/prohoster\" \/>\n\t\t<meta property=\"article:author\" content=\"https:\/\/www.facebook.com\/prohoster\" \/>\n\t\t<!-- All in One SEO -->\n\n","aioseo_head_json":{"title":"\ud83e\udd47A Nim nyelvben bemutatkozott a YRC \u2014 sz\u00e1lbiztos k\u00f6rk\u00f6r\u00f6s hivatkoz\u00e1s-gy\u0171jt\u0151 | ProHoster","description":"Andreas Rumpf (Araq), a Nim programoz\u00e1si nyelv szerz\u0151je bejelentette az \u00faj mem\u00f3riakezel\u00e9si algoritmust, a YRC-t (kiejtve: \"\u00dcrk\"), amely megoldja a Nim megl\u00e9v\u0151 mechanizmusainak egyik kulcsfontoss\u00e1g\u00fa probl\u00e9m\u00e1j\u00e1t: a lehetetlens\u00e9get.","canonical_url":"https:\/\/prohoster.info\/hu\/blog\/news\/v-yazyke-nim-predstavlen-yrc-potokobezopasnyj-sborshhik-cziklicheskih-ssylok","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"hu_HU","og:site_name":"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS 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