{"id":152471,"date":"2025-12-23T23:12:03","date_gmt":"2025-12-23T21:12:03","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/osnovatel-qemu-i-ffmpeg-opublikoval-javascript-dvizhok-micro-quickjs"},"modified":"2025-12-23T23:12:03","modified_gmt":"2025-12-23T21:12:03","slug":"osnovatel-qemu-i-ffmpeg-opublikoval-javascript-dvizhok-micro-quickjs","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hu\/blog\/news\/osnovatel-qemu-i-ffmpeg-opublikoval-javascript-dvizhok-micro-quickjs","title":{"rendered":"A QEMU \u00e9s FFmpeg alap\u00edt\u00f3ja k\u00f6zz\u00e9tette a Micro QuickJS JavaScript motort","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

A francia matematikus Fabrice Bellard, aki egykor a QEMU, FFmpeg, BPG, QuickJS, TinyGL \u00e9s TinyCC projektek alap\u00edt\u00f3ja volt, egy \u00faj JavaScript-motort adott ki be\u00e1gyazott rendszerek sz\u00e1m\u00e1ra \u2014 a Micro QuickJS-t, amely k\u00e9pes JavaScript programokat ford\u00edtani \u00e9s v\u00e9grehajtani, mind\u00f6ssze 10 KB RAM-ot fogyasztva. A motor, a C k\u00f6nyvt\u00e1rral egy\u00fctt, k\u00f6r\u00fclbel\u00fcl 100 KB \u00e1lland\u00f3 mem\u00f3ri\u00e1t haszn\u00e1l. Lehets\u00e9ges a JavaScript ford\u00edt\u00e1sa b\u00e1jt-k\u00f3dra \u00e9s a b\u00e1jt-k\u00f3d k\u00fcl\u00f6nb\u00f6z\u0151 futtat\u00e1sa. A projekt k\u00f3dja C nyelven van meg\u00edrva, \u00e9s MIT licenc alatt terjesztik. <\/p>\n

A motor t\u00e1mogatja a JavaScript nyelv\u00e9nek egy r\u00e9szhalmaz\u00e1t, amely k\u00f6zel \u00e1ll az ECMAScript 5 (ES2019) specifik\u00e1ci\u00f3hoz, de szigor\u00fabb k\u00f6vetelm\u00e9nyeket t\u00e1maszt a k\u00f3dra, \u00e9s nem enged\u00e9lyezi bizonyos hat\u00e9konytalan vagy hib\u00e1s JavaScript konstrukci\u00f3k haszn\u00e1lat\u00e1t. P\u00e9ld\u00e1ul a glob\u00e1lis v\u00e1ltoz\u00f3kat k\u00f6telez\u0151en a \u201evar\u201d kulcssz\u00f3val kell deklar\u00e1lni, a \u201ewith\u201d haszn\u00e1lata tilos, a t\u00f6mb\u00f6k nem tartalmazhatnak \u00fcres helyeket, a \u201enew Number(1)\u201d t\u00edpus\u00fa deklar\u00e1l\u00e1s nem enged\u00e9lyezett, \u00e9s az eval nem f\u00e9rhet hozz\u00e1 a helyi v\u00e1ltoz\u00f3khoz. <\/p>\n

A Micro QuickJS teljes\u00edtm\u00e9nye k\u00f6zel \u00e1ll a Fabrice \u00e1ltal 2019 \u00f3ta fejlesztett QuickJS motor\u00e9hoz. A Micro QuickJS a QuickJS motor k\u00f3dj\u00e1nak egy r\u00e9sz\u00e9t haszn\u00e1lja, de az architekt\u00far\u00e1ja nagym\u00e9rt\u00e9kben elt\u00e9r, \u00e9s a mem\u00f3ria minim\u00e1lis fogyaszt\u00e1s\u00e1ra van tervezve. P\u00e9ld\u00e1ul a Micro QuickJS egy nyomk\u00f6vet\u0151 szem\u00e9tgy\u0171jt\u0151t alkalmaz, m\u00edg a QuickJS referencia-sz\u00e1ml\u00e1l\u00e1st haszn\u00e1l. A szem\u00e9tgy\u0171jt\u0151 k\u00f6lts\u00e9ge csup\u00e1n n\u00e9h\u00e1ny bit minden egyes lefoglalt mem\u00f3ria blokkra. A mem\u00f3ria allok\u00e1l\u00e1s\u00e1hoz egy saj\u00e1t allok\u00e1tor haszn\u00e1lj\u00e1k, amely nem f\u00fcgg a malloc() k\u00f6nyvt\u00e1ri funkci\u00f3t\u00f3l. <\/p>\n

A QuickJS-t\u00f3l val\u00f3 egy\u00e9b elt\u00e9r\u00e9sek: nem haszn\u00e1l stack; virtu\u00e1lis g\u00e9p<\/a>m\u00e1s bels\u0151 objektum\u00e1br\u00e1zol\u00e1s; a karakterl\u00e1ncok UTF-8 k\u00f3dol\u00e1sban vannak t\u00e1rolva; a standard k\u00f6nyvt\u00e1r gener\u00e1l\u00e1sa a ford\u00edt\u00e1s sor\u00e1n, \u00e9s t\u00e1rol\u00e1sa tart\u00f3s mem\u00f3ri\u00e1ban, mind\u00f6ssze n\u00e9h\u00e1ny objektum l\u00e9trehoz\u00e1s\u00e1val a RAM-ban; a QuickJS-hez hasonl\u00f3, de rekurzi\u00f3t nem haszn\u00e1l\u00f3 parser; a bytecode gener\u00e1l\u00e1s\u00e1nak \u00e9s optimaliz\u00e1l\u00e1s\u00e1nak egyes\u00edt\u00e9se egyetlen \u00e1tfut\u00e1sban (a QuickJS-nek t\u00f6bb \u00e1tfut\u00e1sa van az optimaliz\u00e1l\u00e1shoz).
\n
Forr\u00e1s: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0424\u0440\u0430\u043d\u0446\u0443\u0437\u0441\u043a\u0438\u0439 \u043c\u0430\u0442\u0435\u043c\u0430\u0442\u0438\u043a \u0424\u0430\u0431\u0440\u0438\u0441 \u0411\u0435\u043b\u043b\u0430\u0440 (Fabrice Bellard), \u043e\u0441\u043d\u043e\u0432\u0430\u0432\u0448\u0438\u0439 \u0432 \u0441\u0432\u043e\u0451 \u0432\u0440\u0435\u043c\u044f \u043f\u0440\u043e\u0435\u043a\u0442\u044b QEMU, FFmpeg, BPG, QuickJS, TinyGL \u0438 TinyCC, \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043b \u043d\u043e\u0432\u044b\u0439 JavaScript-\u0434\u0432\u0438\u0436\u043e\u043a \u0434\u043b\u044f \u0432\u0441\u0442\u0440\u0430\u0438\u0432\u0430\u0435\u043c\u044b\u0445 \u0441\u0438\u0441\u0442\u0435\u043c — Micro QuickJS, \u0441\u043f\u043e\u0441\u043e\u0431\u043d\u044b\u0439 \u043a\u043e\u043c\u043f\u0438\u043b\u0438\u0440\u043e\u0432\u0430\u0442\u044c \u0438 \u0432\u044b\u043f\u043e\u043b\u043d\u044f\u0442\u044c JavaScript-\u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u044b, \u043f\u043e\u0442\u0440\u0435\u0431\u043b\u044f\u044f \u0432\u0441\u0435\u0433\u043e 10 \u041a\u0411 \u041e\u0417\u0423. \u0412\u043c\u0435\u0441\u0442\u0435 \u0441 \u0421\u0438-\u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u043e\u0439 \u0434\u0432\u0438\u0436\u043e\u043a \u0437\u0430\u043d\u0438\u043c\u0430\u0435\u0442 \u043f\u0440\u0438\u043c\u0435\u0440\u043d\u043e 100 \u041a\u0411 \u043f\u043e\u0441\u0442\u043e\u044f\u043d\u043d\u043e\u0439 \u043f\u0430\u043c\u044f\u0442\u0438. \u0412\u043e\u0437\u043c\u043e\u0436\u043d\u0430 \u043a\u043e\u043c\u043f\u0438\u043b\u044f\u0446\u0438\u044f JavaScript \u0432 \u0431\u0430\u0439\u0442\u043a\u043e\u0434 \u0438 \u043e\u0442\u0434\u0435\u043b\u044c\u043d\u044b\u0439 \u0437\u0430\u043f\u0443\u0441\u043a […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-152471","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47A QEMU \u00e9s FFmpeg alap\u00edt\u00f3ja k\u00f6zz\u00e9tette a Micro QuickJS JavaScript motort | ProHoster","description":"A francia matematikus, Fabrice Bellard, aki l\u00e9trehozta a QEMU, FFmpeg, BPG, QuickJS, TinyGL \u00e9s TinyCC projekteket, k\u00f6zz\u00e9tette \u00faj JavaScript-motort be\u00e1gyazott rendszerekhez - 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