gugdun
/
pocketpy
mirrorاز https://github.com/pocketpy/pocketpy


			
							123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462
							<!DOCTYPE html>
<html lang="en" class="h-full">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width,initial-scale=1">
    <meta name="color-scheme" content="light dark">
    <meta name="turbo-cache-control" content="no-cache" data-turbo-track="reload" data-track-token="4.1.0.825921057143">

    <!-- See retype.com -->
    <meta name="generator" content="Retype 4.1.0">

    <!-- Primary Meta Tags -->
    <title>Compute Threads | Portable Python 3.x Interpreter in Modern C</title>
    <meta name="title" content="Compute Threads | Portable Python 3.x Interpreter in Modern C">
    <meta name="description" content="pocketpy organizes its state by VM structure. Users can have at maximum 16 VM instances (index from 0 to 15). Each VM instance can only be accessed by">

    <!-- Canonical -->
    <link rel="canonical" href="https://pocketpy.dev/features/threading/">

    <!-- Open Graph -->
    <meta property="og:type" content="website">
    <meta property="og:url" content="https://pocketpy.dev/features/threading/">
    <meta property="og:title" content="Compute Threads | Portable Python 3.x Interpreter in Modern C">
    <meta property="og:description" content="pocketpy organizes its state by VM structure. Users can have at maximum 16 VM instances (index from 0 to 15). Each VM instance can only be accessed by">
    <meta property="og:site_name" content="pocketpy">
    <meta property="og:locale" content="en_US">

    <script data-cfasync="false">(function(){var cl=document.documentElement.classList,ls=localStorage.getItem("retype_scheme"),hd=cl.contains("dark"),hl=cl.contains("light"),wm=window.matchMedia&&window.matchMedia("(prefers-color-scheme: dark)").matches;if(ls==="dark"||(!ls&&wm&&!hd&&!hl)){cl.remove("light");cl.add("dark")}else if(ls==="light"||(!ls&&!wm&&!hd&&!hl)){cl.remove("dark");cl.add("light")}})();</script>

    <link id="retype-favicon" rel="icon" href="../../static/logo.png" />
    <link href="../../resources/css/retype.css?v=4.1.0.825921057143" rel="stylesheet">

    <script data-cfasync="false" src="../../resources/js/config.js?v=4.1.0.825921057143" data-turbo-eval="false" defer></script>
    <script data-cfasync="false" src="../../resources/js/retype.js?v=4.1.0" data-turbo-eval="false" defer></script>
    <script id="lunr-js" data-cfasync="false" src="../../resources/js/lunr.js?v=4.1.0.825921057143" data-turbo-eval="false" defer></script>
    <script id="prism-js" data-cfasync="false" src="../../resources/js/prism.js?v=4.1.0.825921057143" defer></script>
    <script id="mermaid-js" data-cfasync="false" src="../../resources/js/mermaid.js?v=4.1.0" defer></script>
</head>
<body>
    <div id="retype-app" class="relative text-base antialiased text-base-text bg-base-bg font-body">
    <div class="absolute bottom-0 left-0" style="top: 5rem; right: 50%"></div>

    <header id="retype-header" class="sticky top-0 z-30 flex w-full h-16 bg-header-bg border-b border-header-border md:h-20">
        <div class="container relative flex items-center justify-between pr-6 grow md:justify-start">
            <!-- Mobile menu button skeleton -->
            <button v-cloak class="skeleton retype-mobile-menu-button flex items-center justify-center shrink-0 overflow-hidden dark:text-white focus:outline-hidden rounded-full w-10 h-10 ml-3.5 md:hidden"><svg xmlns="http://www.w3.org/2000/svg" class="mb-px shrink-0" width="24" height="24" viewBox="0 0 24 24" role="presentation" style="margin-bottom: 0px;"><g fill="currentColor"><path d="M2 4h20v2H2zM2 11h20v2H2zM2 18h20v2H2z"></path></g></svg></button>
            <div v-cloak id="retype-sidebar-left-toggle-button"></div>
    
            <!-- Logo -->
            <div class="flex items-center justify-between h-full py-2 md:w-75">
                <div class="flex items-center px-2 md:px-6">
                    <a id="retype-branding-logo" href="../../" class="flex items-center leading-snug text-2xl">
                        <span class="w-10 mr-2 grow-0 shrink-0 overflow-hidden">
                            <img class="max-h-10 dark:hidden md:inline-block" src="../../static/logo.png">
                            <img class="max-h-10 hidden dark:inline-block" src="../../static/logo.png">
                        </span>
                        <span class="dark:text-white font-bold line-clamp-1 md:line-clamp-2">pocketpy</span>
                    </a><span id="retype-branding-label" class="inline-flex mt-1 px-2 py-1 ml-4 text-xs font-medium leading-none items-center rounded-md bg-branding-label-bg text-branding-label-text ring-1 ring-branding-label-border ring-inset md:inline-block">v2.1.8</span>
                </div>
    
                <span class="hidden h-8 border-r md:inline-block border-base-border"></span>
            </div>
    
            <div class="flex justify-between md:grow">
                <!-- Top Nav -->
                <nav id="retype-header-nav" class="hidden md:flex">
                    <ul class="flex flex-col mb-4 md:pl-16 md:mb-0 md:flex-row md:items-center">
                        <li class="mr-6">
                            <a class="py-2 md:mb-0 inline-flex items-center text-sm whitespace-nowrap transition-colors duration-200 ease-linear md:text-header-text font-header-text hover:text-header-text-hover" href="">
                                <svg xmlns="http://www.w3.org/2000/svg" class="mb-px mr-1" width="18" height="18" viewBox="0 0 24 24" role="presentation">
                                    <g fill="currentColor">
                                        <path d="M11.03 2.59a1.501 1.501 0 0 1 1.94 0l7.5 6.363a1.5 1.5 0 0 1 .53 1.144V19.5a1.5 1.5 0 0 1-1.5 1.5h-5.75a.75.75 0 0 1-.75-.75V14h-2v6.25a.75.75 0 0 1-.75.75H4.5A1.5 1.5 0 0 1 3 19.5v-9.403c0-.44.194-.859.53-1.144ZM12 3.734l-7.5 6.363V19.5h5v-6.25a.75.75 0 0 1 .75-.75h3.5a.75.75 0 0 1 .75.75v6.25h5v-9.403Z"/>
                                    </g>
                                </svg>
                                <span>Home</span>
                            </a>
                        </li>
                        <li class="mr-6">
                            <a class="py-2 md:mb-0 inline-flex items-center text-sm whitespace-nowrap transition-colors duration-200 ease-linear md:text-header-text font-header-text hover:text-header-text-hover" href="https://pocketpy.dev/static/web/" target="_blank">
                                <svg xmlns="http://www.w3.org/2000/svg" class="mb-px mr-1" width="18" height="18" viewBox="0 0 24 24" role="presentation">
                                    <g fill="currentColor">
                                        <path d="M9.5 15.584V8.416a.5.5 0 0 1 .77-.42l5.576 3.583a.5.5 0 0 1 0 .842l-5.576 3.584a.5.5 0 0 1-.77-.42Z"/><path d="M1 12C1 5.925 5.925 1 12 1s11 4.925 11 11-4.925 11-11 11S1 18.075 1 12Zm11-9.5A9.5 9.5 0 0 0 2.5 12a9.5 9.5 0 0 0 9.5 9.5 9.5 9.5 0 0 0 9.5-9.5A9.5 9.5 0 0 0 12 2.5Z"/>
                                    </g>
                                </svg>
                                <span>Live Demo</span>
                            </a>
                        </li>
                        <li class="mr-6">
                            <a class="py-2 md:mb-0 inline-flex items-center text-sm whitespace-nowrap transition-colors duration-200 ease-linear md:text-header-text font-header-text hover:text-header-text-hover" href="https://pocketpy.github.io/examples/" target="_blank">
                                <svg xmlns="http://www.w3.org/2000/svg" class="mb-px mr-1" width="18" height="18" viewBox="0 0 24 24" role="presentation">
                                    <g fill="currentColor">
                                        <path d="M15.22 4.97a.75.75 0 0 1 1.06 0l6.5 6.5a.75.75 0 0 1 0 1.06l-6.5 6.5a.749.749 0 0 1-1.275-.326.749.749 0 0 1 .215-.734L21.19 12l-5.97-5.97a.75.75 0 0 1 0-1.06Zm-6.44 0a.75.75 0 0 1 0 1.06L2.81 12l5.97 5.97a.749.749 0 0 1-.326 1.275.749.749 0 0 1-.734-.215l-6.5-6.5a.75.75 0 0 1 0-1.06l6.5-6.5a.75.75 0 0 1 1.06 0Z"/>
                                    </g>
                                </svg>
                                <span>Live Examples</span>
                            </a>
                        </li>
                        <li class="mr-6">
                            <a class="py-2 md:mb-0 inline-flex items-center text-sm whitespace-nowrap transition-colors duration-200 ease-linear md:text-header-text font-header-text hover:text-header-text-hover" href="https://github.com/blueloveth/pocketpy" target="_blank">
                                <svg xmlns="http://www.w3.org/2000/svg" class="mb-px mr-1" width="18" height="18" viewBox="0 0 24 24" role="presentation">
                                    <g fill="currentColor">
                                        <path d="M10.303 16.652c-2.837-.344-4.835-2.385-4.835-5.028 0-1.074.387-2.235 1.031-3.008-.279-.709-.236-2.214.086-2.837.86-.107 2.02.344 2.708.967.816-.258 1.676-.386 2.728-.386 1.053 0 1.913.128 2.686.365.666-.602 1.848-1.053 2.708-.946.3.581.344 2.085.064 2.815.688.817 1.053 1.913 1.053 3.03 0 2.643-1.998 4.641-4.877 5.006.73.473 1.224 1.504 1.224 2.686v2.235c0 .644.537 1.01 1.182.752 3.889-1.483 6.94-5.372 6.94-10.185 0-6.081-4.942-11.044-11.022-11.044-6.081 0-10.98 4.963-10.98 11.044a10.84 10.84 0 0 0 7.112 10.206c.58.215 1.139-.172 1.139-.752v-1.719a2.768 2.768 0 0 1-1.032.215c-1.418 0-2.256-.773-2.857-2.213-.237-.58-.495-.924-.989-.988-.258-.022-.344-.129-.344-.258 0-.258.43-.451.86-.451.623 0 1.16.386 1.719 1.181.43.623.881.903 1.418.903.537 0 .881-.194 1.375-.688.365-.365.645-.687.903-.902Z"/>
                                    </g>
                                </svg>
                                <span>Github</span>
                            </a>
                        </li>
                        <li class="mr-6">
                            <a class="py-2 md:mb-0 inline-flex items-center text-sm whitespace-nowrap transition-colors duration-200 ease-linear md:text-header-text font-header-text hover:text-header-text-hover" href="https://discord.gg/WWaq72GzXv" target="_blank">
                                <svg xmlns="http://www.w3.org/2000/svg" class="mb-px mr-1" width="18" height="18" viewBox="0 0 24 24" role="presentation">
                                    <g fill="currentColor">
                                        <path d="M1.75 1h12.5c.966 0 1.75.784 1.75 1.75v9.5A1.75 1.75 0 0 1 14.25 14H8.061l-2.574 2.573A1.458 1.458 0 0 1 3 15.543V14H1.75A1.75 1.75 0 0 1 0 12.25v-9.5C0 1.784.784 1 1.75 1ZM1.5 2.75v9.5c0 .138.112.25.25.25h2a.75.75 0 0 1 .75.75v2.19l2.72-2.72a.749.749 0 0 1 .53-.22h6.5a.25.25 0 0 0 .25-.25v-9.5a.25.25 0 0 0-.25-.25H1.75a.25.25 0 0 0-.25.25Z"/><path d="M22.5 8.75a.25.25 0 0 0-.25-.25h-3.5a.75.75 0 0 1 0-1.5h3.5c.966 0 1.75.784 1.75 1.75v9.5A1.75 1.75 0 0 1 22.25 20H21v1.543a1.457 1.457 0 0 1-2.487 1.03L15.939 20H10.75A1.75 1.75 0 0 1 9 18.25v-1.465a.75.75 0 0 1 1.5 0v1.465c0 .138.112.25.25.25h5.5a.75.75 0 0 1 .53.22l2.72 2.72v-2.19a.75.75 0 0 1 .75-.75h2a.25.25 0 0 0 .25-.25v-9.5Z"/>
                                    </g>
                                </svg>
                                <span>Discord</span>
                            </a>
                        </li>
    
                    </ul>
                </nav>
    
                <div v-cloak class="flex justify-end grow">
                    <div id="retype-mobile-search-button"></div>
                    <doc-search-desktop></doc-search-desktop>
    
                    <doc-theme-switch class="lg:ml-2"></doc-theme-switch>
                    <doc-history></doc-history>
                </div>
            </div>
        </div>
    </header>


    <div id="retype-container" class="container relative flex bg-white">
        <!-- Sidebar Skeleton -->
        <div v-cloak class="fixed flex flex-col shrink-0 duration-300 ease-in-out bg-sidebar-left-bg border-sidebar-left-border sidebar top-20 w-75 border-r h-screen md:sticky transition-transform skeleton">
        
            <div class="flex items-center h-16 px-6">
                <input id="retype-filter-input-mock" class="w-full h-10 pl-8 px-3 py-2 transition-colors duration-200 ease-linear bg-filter-bg border border-filter-border rounded-lg shadow-none md:text-sm hover:border-filter-border-hover focus:outline-hidden focus:border-filter-border-focus placeholder-filter-placeholder" type="text">
            </div>
        
            <div class="pl-6 mt-1 mb-4">
                <div class="w-32 h-3 mb-4 bg-skeleton-bg rounded-full loading"></div>
                <div class="w-48 h-3 mb-4 bg-skeleton-bg rounded-full loading"></div>
                <div class="w-40 h-3 mb-4 bg-skeleton-bg rounded-full loading"></div>
                <div class="w-32 h-3 mb-4 bg-skeleton-bg rounded-full loading"></div>
                <div class="w-48 h-3 mb-4 bg-skeleton-bg rounded-full loading"></div>
                <div class="w-40 h-3 mb-4 bg-skeleton-bg rounded-full loading"></div>
            </div>
        
            <div class="shrink-0 mt-auto bg-transparent dark:border-base-border">
                <a class="flex items-center justify-center flex-nowrap h-16 text-gray-350 dark:text-dark-400 hover:text-gray-600 dark:hover:text-dark-300 transition-colors duration-150 ease-in docs-powered-by" target="_blank" href="https://retype.com/" rel="noopener">
                    <span class="text-xs whitespace-nowrap">Powered by</span>
                    <svg xmlns="http://www.w3.org/2000/svg" class="ml-2" fill="currentColor" width="96" height="20" overflow="visible"><path d="M0 0v20h13.59V0H0zm11.15 17.54H2.44V2.46h8.71v15.08zM15.8 20h2.44V4.67L15.8 2.22zM20.45 6.89V20h2.44V9.34z"/><g><path d="M40.16 8.44c0 1.49-.59 2.45-1.75 2.88l2.34 3.32h-2.53l-2.04-2.96h-1.43v2.96h-2.06V5.36h3.5c1.43 0 2.46.24 3.07.73s.9 1.27.9 2.35zm-2.48 1.1c.26-.23.38-.59.38-1.09 0-.5-.13-.84-.4-1.03s-.73-.28-1.39-.28h-1.54v2.75h1.5c.72 0 1.2-.12 1.45-.35zM51.56 5.36V7.2h-4.59v1.91h4.13v1.76h-4.13v1.92h4.74v1.83h-6.79V5.36h6.64zM60.09 7.15v7.48h-2.06V7.15h-2.61V5.36h7.28v1.79h-2.61zM70.81 14.64h-2.06v-3.66l-3.19-5.61h2.23l1.99 3.45 1.99-3.45H74l-3.19 5.61v3.66zM83.99 6.19c.65.55.97 1.4.97 2.55s-.33 1.98-1 2.51-1.68.8-3.04.8h-1.23v2.59h-2.06V5.36h3.26c1.42 0 2.45.28 3.1.83zm-1.51 3.65c.25-.28.37-.69.37-1.22s-.16-.92-.48-1.14c-.32-.23-.82-.34-1.5-.34H79.7v3.12h1.38c.68 0 1.15-.14 1.4-.42zM95.85 5.36V7.2h-4.59v1.91h4.13v1.76h-4.13v1.92H96v1.83h-6.79V5.36h6.64z"/></g></svg>
                </a>
            </div>
        </div>
        
        <!-- Sidebar component -->
        <doc-sidebar v-cloak>
            <template #sidebar-footer>
                <div class="shrink-0 mt-auto border-t md:bg-transparent md:border-none dark:border-base-border">
        
                    <div class="py-3 px-6 md:hidden border-b dark:border-base-border">
                        <nav>
                            <ul class="flex flex-wrap justify-center items-center">
                                <li class="mr-6">
                                    <a class="block py-1 inline-flex items-center text-sm whitespace-nowrap transition-colors duration-200 ease-linear md:text-header-text font-header-text hover:text-header-text-hover" href="">
                                        <svg xmlns="http://www.w3.org/2000/svg" class="mb-px mr-1" width="18" height="18" viewBox="0 0 24 24" role="presentation">
                                            <g fill="currentColor">
                                                <path d="M11.03 2.59a1.501 1.501 0 0 1 1.94 0l7.5 6.363a1.5 1.5 0 0 1 .53 1.144V19.5a1.5 1.5 0 0 1-1.5 1.5h-5.75a.75.75 0 0 1-.75-.75V14h-2v6.25a.75.75 0 0 1-.75.75H4.5A1.5 1.5 0 0 1 3 19.5v-9.403c0-.44.194-.859.53-1.144ZM12 3.734l-7.5 6.363V19.5h5v-6.25a.75.75 0 0 1 .75-.75h3.5a.75.75 0 0 1 .75.75v6.25h5v-9.403Z"/>
                                            </g>
                                        </svg>
                                        <span>Home</span>
                                    </a>
                                </li>
                                <li class="mr-6">
                                    <a class="block py-1 inline-flex items-center text-sm whitespace-nowrap transition-colors duration-200 ease-linear md:text-header-text font-header-text hover:text-header-text-hover" href="https://pocketpy.dev/static/web/" target="_blank">
                                        <svg xmlns="http://www.w3.org/2000/svg" class="mb-px mr-1" width="18" height="18" viewBox="0 0 24 24" role="presentation">
                                            <g fill="currentColor">
                                                <path d="M9.5 15.584V8.416a.5.5 0 0 1 .77-.42l5.576 3.583a.5.5 0 0 1 0 .842l-5.576 3.584a.5.5 0 0 1-.77-.42Z"/><path d="M1 12C1 5.925 5.925 1 12 1s11 4.925 11 11-4.925 11-11 11S1 18.075 1 12Zm11-9.5A9.5 9.5 0 0 0 2.5 12a9.5 9.5 0 0 0 9.5 9.5 9.5 9.5 0 0 0 9.5-9.5A9.5 9.5 0 0 0 12 2.5Z"/>
                                            </g>
                                        </svg>
                                        <span>Live Demo</span>
                                    </a>
                                </li>
                                <li class="mr-6">
                                    <a class="block py-1 inline-flex items-center text-sm whitespace-nowrap transition-colors duration-200 ease-linear md:text-header-text font-header-text hover:text-header-text-hover" href="https://pocketpy.github.io/examples/" target="_blank">
                                        <svg xmlns="http://www.w3.org/2000/svg" class="mb-px mr-1" width="18" height="18" viewBox="0 0 24 24" role="presentation">
                                            <g fill="currentColor">
                                                <path d="M15.22 4.97a.75.75 0 0 1 1.06 0l6.5 6.5a.75.75 0 0 1 0 1.06l-6.5 6.5a.749.749 0 0 1-1.275-.326.749.749 0 0 1 .215-.734L21.19 12l-5.97-5.97a.75.75 0 0 1 0-1.06Zm-6.44 0a.75.75 0 0 1 0 1.06L2.81 12l5.97 5.97a.749.749 0 0 1-.326 1.275.749.749 0 0 1-.734-.215l-6.5-6.5a.75.75 0 0 1 0-1.06l6.5-6.5a.75.75 0 0 1 1.06 0Z"/>
                                            </g>
                                        </svg>
                                        <span>Live Examples</span>
                                    </a>
                                </li>
                                <li class="mr-6">
                                    <a class="block py-1 inline-flex items-center text-sm whitespace-nowrap transition-colors duration-200 ease-linear md:text-header-text font-header-text hover:text-header-text-hover" href="https://github.com/blueloveth/pocketpy" target="_blank">
                                        <svg xmlns="http://www.w3.org/2000/svg" class="mb-px mr-1" width="18" height="18" viewBox="0 0 24 24" role="presentation">
                                            <g fill="currentColor">
                                                <path d="M10.303 16.652c-2.837-.344-4.835-2.385-4.835-5.028 0-1.074.387-2.235 1.031-3.008-.279-.709-.236-2.214.086-2.837.86-.107 2.02.344 2.708.967.816-.258 1.676-.386 2.728-.386 1.053 0 1.913.128 2.686.365.666-.602 1.848-1.053 2.708-.946.3.581.344 2.085.064 2.815.688.817 1.053 1.913 1.053 3.03 0 2.643-1.998 4.641-4.877 5.006.73.473 1.224 1.504 1.224 2.686v2.235c0 .644.537 1.01 1.182.752 3.889-1.483 6.94-5.372 6.94-10.185 0-6.081-4.942-11.044-11.022-11.044-6.081 0-10.98 4.963-10.98 11.044a10.84 10.84 0 0 0 7.112 10.206c.58.215 1.139-.172 1.139-.752v-1.719a2.768 2.768 0 0 1-1.032.215c-1.418 0-2.256-.773-2.857-2.213-.237-.58-.495-.924-.989-.988-.258-.022-.344-.129-.344-.258 0-.258.43-.451.86-.451.623 0 1.16.386 1.719 1.181.43.623.881.903 1.418.903.537 0 .881-.194 1.375-.688.365-.365.645-.687.903-.902Z"/>
                                            </g>
                                        </svg>
                                        <span>Github</span>
                                    </a>
                                </li>
                                <li class="mr-6">
                                    <a class="block py-1 inline-flex items-center text-sm whitespace-nowrap transition-colors duration-200 ease-linear md:text-header-text font-header-text hover:text-header-text-hover" href="https://discord.gg/WWaq72GzXv" target="_blank">
                                        <svg xmlns="http://www.w3.org/2000/svg" class="mb-px mr-1" width="18" height="18" viewBox="0 0 24 24" role="presentation">
                                            <g fill="currentColor">
                                                <path d="M1.75 1h12.5c.966 0 1.75.784 1.75 1.75v9.5A1.75 1.75 0 0 1 14.25 14H8.061l-2.574 2.573A1.458 1.458 0 0 1 3 15.543V14H1.75A1.75 1.75 0 0 1 0 12.25v-9.5C0 1.784.784 1 1.75 1ZM1.5 2.75v9.5c0 .138.112.25.25.25h2a.75.75 0 0 1 .75.75v2.19l2.72-2.72a.749.749 0 0 1 .53-.22h6.5a.25.25 0 0 0 .25-.25v-9.5a.25.25 0 0 0-.25-.25H1.75a.25.25 0 0 0-.25.25Z"/><path d="M22.5 8.75a.25.25 0 0 0-.25-.25h-3.5a.75.75 0 0 1 0-1.5h3.5c.966 0 1.75.784 1.75 1.75v9.5A1.75 1.75 0 0 1 22.25 20H21v1.543a1.457 1.457 0 0 1-2.487 1.03L15.939 20H10.75A1.75 1.75 0 0 1 9 18.25v-1.465a.75.75 0 0 1 1.5 0v1.465c0 .138.112.25.25.25h5.5a.75.75 0 0 1 .53.22l2.72 2.72v-2.19a.75.75 0 0 1 .75-.75h2a.25.25 0 0 0 .25-.25v-9.5Z"/>
                                            </g>
                                        </svg>
                                        <span>Discord</span>
                                    </a>
                                </li>
        
                            </ul>
                        </nav>
                    </div>
        
                    <a class="flex items-center justify-center flex-nowrap h-16 text-gray-350 dark:text-dark-400 hover:text-gray-600 dark:hover:text-dark-300 transition-colors duration-150 ease-in docs-powered-by" target="_blank" href="https://retype.com/" rel="noopener">
                        <span class="text-xs whitespace-nowrap">Powered by</span>
                        <svg xmlns="http://www.w3.org/2000/svg" class="ml-2" fill="currentColor" width="96" height="20" overflow="visible"><path d="M0 0v20h13.59V0H0zm11.15 17.54H2.44V2.46h8.71v15.08zM15.8 20h2.44V4.67L15.8 2.22zM20.45 6.89V20h2.44V9.34z"/><g><path d="M40.16 8.44c0 1.49-.59 2.45-1.75 2.88l2.34 3.32h-2.53l-2.04-2.96h-1.43v2.96h-2.06V5.36h3.5c1.43 0 2.46.24 3.07.73s.9 1.27.9 2.35zm-2.48 1.1c.26-.23.38-.59.38-1.09 0-.5-.13-.84-.4-1.03s-.73-.28-1.39-.28h-1.54v2.75h1.5c.72 0 1.2-.12 1.45-.35zM51.56 5.36V7.2h-4.59v1.91h4.13v1.76h-4.13v1.92h4.74v1.83h-6.79V5.36h6.64zM60.09 7.15v7.48h-2.06V7.15h-2.61V5.36h7.28v1.79h-2.61zM70.81 14.64h-2.06v-3.66l-3.19-5.61h2.23l1.99 3.45 1.99-3.45H74l-3.19 5.61v3.66zM83.99 6.19c.65.55.97 1.4.97 2.55s-.33 1.98-1 2.51-1.68.8-3.04.8h-1.23v2.59h-2.06V5.36h3.26c1.42 0 2.45.28 3.1.83zm-1.51 3.65c.25-.28.37-.69.37-1.22s-.16-.92-.48-1.14c-.32-.23-.82-.34-1.5-.34H79.7v3.12h1.38c.68 0 1.15-.14 1.4-.42zM95.85 5.36V7.2h-4.59v1.91h4.13v1.76h-4.13v1.92H96v1.83h-6.79V5.36h6.64z"/></g></svg>
                    </a>
                </div>
            </template>
        </doc-sidebar>

        <div class="grow min-w-0 bg-body-bg">
            <!-- Render "toolbar" template here on api pages --><!-- Render page content -->
<div class="flex">
    <div id="retype-main" class="min-w-0 p-4 grow md:px-16">
        <main class="relative pb-12 lg:pt-2">
            <div class="retype-markdown" id="retype-content">
                <!-- Rendered if sidebar right is enabled -->
                <div id="retype-sidebar-right-toggle"></div>
                <!-- Page content  -->
<doc-anchor-target id="compute-threads" class="break-words">
    <h1>
        <doc-anchor-trigger class="header-anchor-trigger" to="#compute-threads">#</doc-anchor-trigger>
        <span>Compute Threads</span>
    </h1>
</doc-anchor-target>
<p>pocketpy organizes its state by <code translate="no" v-pre>VM</code> structure.
Users can have at maximum 16 <code translate="no" v-pre>VM</code> instances (index from 0 to 15).
Each <code translate="no" v-pre>VM</code> instance can only be accessed by exactly one thread at a time.
If you are trying to run two python scripts in parallel refering the same <code translate="no" v-pre>VM</code> instance,
you will crash it definitely.</p>
<p>However, there are two ways to achieve multi-threading in pocketpy.</p>
<p>One way is to use a native threading library such as <code translate="no" v-pre>pthread</code>.
You can wrap the multi-threading logic into a C function and bind it to pocketpy.
Be careful and not to access the same <code translate="no" v-pre>VM</code> instance from multiple threads at the same time.
You need to lock critical resources or perform a deep copy of all needed data.</p>
<doc-anchor-target id="computethread">
    <h2>
        <doc-anchor-trigger class="header-anchor-trigger" to="#computethread">#</doc-anchor-trigger>
        <span>ComputeThread</span>
    </h2>
</doc-anchor-target>
<p>The other way is to use <code translate="no" v-pre>pkpy.ComputeThread</code>.
It is like an isolate in Dart language.
<code translate="no" v-pre>ComputeThread</code> is a true multi-threading model to allow you run python scripts in parallel without lock,
backed by a separate <code translate="no" v-pre>VM</code> instance.</p>
<p><code translate="no" v-pre>ComputeThread</code> is highly designed for computational intensive tasks in games.
For example, you can run game logic in main thread (VM 0) and run world generation in another thread (e.g. VM 1).</p>
<div class="overflow-hidden mb-6 py-4 dark:px-5 dark:bg-white rounded-md"><pre translate="no" class="mermaid w-full">graph TD
    subgraph Main Thread
        A[Game Start]
        B[Submit WorldGen Job]
        C[Frame 1]
        D[Frame 2]
        E[Frame 3]
        F[...]
        G[Get WorldGen Result]
        H[Render World]
    end
    subgraph WorldGen Thread
        O[Generate Biomes]
        P[Generate Terrain]
        Q[Generate Creatures]
        R[Dump Result]
    end
    A --&gt; B
    B --&gt; C
    C --&gt; D
    D --&gt; E
    E --&gt; F
    F --&gt; G
    G --&gt; H

    O --&gt; P
    P --&gt; Q
    Q --&gt; R

    B --&gt; O
    R --&gt; G</pre></div>
<doc-anchor-target id="mainpy">
    <h4>
        <doc-anchor-trigger class="header-anchor-trigger" to="#mainpy">#</doc-anchor-trigger>
        <span><code translate="no" v-pre>main.py</code></span>
    </h4>
</doc-anchor-target>
<div id="mainpy-code-1" class="codeblock-wrapper"><doc-codeblock>
<pre translate="no" class="language-python"><code v-pre class="language-python">import time
from pkpy import ComputeThread

thread = ComputeThread(1)
print(&quot;Game Start&quot;)

# import worldgen.py
thread.exec('from worldgen import gen_world')

print(&quot;Submit WorldGen Job&quot;)
thread.submit_call('gen_world', 3, (100, 100), 10)

# wait for worldgen to finish
for i in range(1, 100000):
    print('Frame:', i)
    time.sleep(1)
    if thread.is_done:
        break

error = thread.last_error()
if error is not None:
    print(&quot;Error:&quot;, error)
else:
    retval = thread.last_retval()
    biomes = retval['biomes']
    terrain = retval['terrain']
    creatures = retval['creatures']
    print(&quot;World Generation Complete&quot;, len(biomes), len(terrain), len(creatures))</code></pre>
</doc-codeblock></div>
<doc-anchor-target id="worldgenpy">
    <h4>
        <doc-anchor-trigger class="header-anchor-trigger" to="#worldgenpy">#</doc-anchor-trigger>
        <span><code translate="no" v-pre>worldgen.py</code></span>
    </h4>
</doc-anchor-target>
<div id="worldgenpy-code-1" class="codeblock-wrapper"><doc-codeblock>
<pre translate="no" class="language-python"><code v-pre class="language-python">import time
import random

def gen_world(biome_count: int, terrain_size: tuple[int, int], creature_count: int) -&gt; dict:
    # simulate a long computation
    time.sleep(3)

    # generate world data
    all_biomes = [&quot;forest&quot;, &quot;desert&quot;, &quot;ocean&quot;, &quot;mountain&quot;, &quot;swamp&quot;]
    all_creatures = [&quot;wolf&quot;, &quot;bear&quot;, &quot;fish&quot;, &quot;bird&quot;, &quot;lizard&quot;]

    width, height = terrain_size

    terrain_data = [
        random.randint(1, 10)
        for _ in range(width * height)
    ]

    creatures = [
        {
            &quot;name&quot;: random.choice(all_creatures),
            &quot;x&quot;: random.randint(0, width - 1),
            &quot;y&quot;: random.randint(0, height - 1),
        }
        for i in range(creature_count)
    ]

    return {
        &quot;biomes&quot;: all_biomes[:biome_count],
        &quot;terrain&quot;: terrain_data,
        &quot;creatures&quot;: creatures,
    }</code></pre>
</doc-codeblock></div>
<p>Run <code translate="no" v-pre>main.py</code> and you will see the result like this:</p>
<div id="worldgenpy-code-2" class="codeblock-wrapper"><doc-codeblock>
<pre translate="no" class="language-none"><code v-pre class="language-none">Game Start
Submit WorldGen Job
Frame: 1
Frame: 2
Frame: 3
Frame: 4
World Generation Complete 3 10000 10</code></pre>
</doc-codeblock></div>
<p><code translate="no" v-pre>ComputeThread</code> uses <code translate="no" v-pre>pickle</code> module to serialize the data between threads.
Parameters and return values must be supported by <code translate="no" v-pre>pickle</code>.
See <a href="https://pocketpy.dev/modules/pickle/">pickle</a> for more details.</p>
<p>Since <code translate="no" v-pre>ComputeThread</code> is backed by a separate <code translate="no" v-pre>VM</code> instance,
it does not share any state with the main thread
except for the parameters you pass to it.
Therefore, common python modules will be imported twice in each thread.</p>
<p>If you want to identify which VM instance the module is running in,
you can call <code translate="no" v-pre>pkpy.currentvm</code> or let your <code translate="no" v-pre>ComputeThread</code> set some special flags
before importing these modules.</p>

                
                <!-- Required only on API pages -->
                <doc-toolbar-member-filter-no-results></doc-toolbar-member-filter-no-results>
            </div>
            <footer id="retype-content-footer" class="clear-both">
            
                <nav id="retype-nextprev" class="print:hidden flex mt-14">
                    <div class="w-1/2">
                        <a class="px-5 py-4 h-full flex items-center break-normal font-medium text-body-link border border-base-border hover:border-base-border-hover rounded-l-lg transition-colors duration-150 relative hover:z-5" href="../../features/profiling/">
                            <svg xmlns="http://www.w3.org/2000/svg" class="mr-3" width="24" height="24" viewBox="0 0 24 24" fill="currentColor" overflow="visible"><path d="M19 11H7.41l5.29-5.29a.996.996 0 10-1.41-1.41l-7 7a1 1 0 000 1.42l7 7a1.024 1.024 0 001.42-.01.996.996 0 000-1.41L7.41 13H19c.55 0 1-.45 1-1s-.45-1-1-1z" /><path fill="none" d="M0 0h24v24H0z" /></svg>
                            <span>
                                <span class="block text-xs font-normal text-base-text-muted">Previous</span>
                                <span class="block mt-1">Profiling</span>
                            </span>
                        </a>
                    </div>
            
                    <div class="w-1/2">
                        <a class="px-5 py-4 -mx-px h-full flex items-center justify-end break-normal font-medium text-body-link border border-base-border hover:border-base-border-hover rounded-r-lg transition-colors duration-150 relative hover:z-5" href="../../features/ub/">
                            <span>
                                <span class="block text-xs font-normal text-right text-base-text-muted">Next</span>
                                <span class="block mt-1">Undefined Behaviour</span>
                            </span>
                            <svg xmlns="http://www.w3.org/2000/svg" class="ml-3" width="24" height="24" viewBox="0 0 24 24" fill="currentColor" overflow="visible"><path d="M19.92 12.38a1 1 0 00-.22-1.09l-7-7a.996.996 0 10-1.41 1.41l5.3 5.3H5c-.55 0-1 .45-1 1s.45 1 1 1h11.59l-5.29 5.29a.996.996 0 000 1.41c.19.2.44.3.7.3s.51-.1.71-.29l7-7c.09-.09.16-.21.21-.33z" /><path fill="none" d="M0 0h24v24H0z" /></svg>
                        </a>
                    </div>
                </nav>
            </footer>
        </main>

        <div id="retype-page-footer" class="print:border-none border-t border-base-border pt-6 mb-8">
            <footer class="flex flex-wrap items-center justify-between print:justify-center">
                <div id="retype-footer-links" class="print:hidden">
                    <ul class="flex flex-wrap items-center text-sm">
                    </ul>
                </div>
                <div id="retype-copyright" class="print:justify-center py-2 text-footer-text font-footer-link text-sm leading-relaxed"><p>© Copyright 2026 - <a href="https://github.com/blueloveTH">blueloveTH</a> - All rights reserved.</p></div>
            </footer>
        </div>
    </div>

    <!-- Rendered if sidebar right is enabled -->
    <!-- Sidebar right skeleton-->
    <div v-cloak class="fixed top-0 bottom-0 right-0 translate-x-full bg-sidebar-right-bg border-sidebar-right-border lg:sticky lg:border-l lg:shrink-0 lg:pt-6 lg:translate-x-0 sm:w-1/2 lg:w-64 lg:z-0 md:w-104 sidebar-right skeleton">
        <div class="pl-5">
            <div class="w-32 h-3 mb-4 bg-skeleton-bg rounded-full loading"></div>
            <div class="w-48 h-3 mb-4 bg-skeleton-bg rounded-full loading"></div>
            <div class="w-40 h-3 mb-4 bg-skeleton-bg rounded-full loading"></div>
        </div>
    </div>

    <!-- User should be able to hide sidebar right -->
    <doc-sidebar-right v-cloak></doc-sidebar-right>
</div>

        </div>
    </div>

    <doc-search-mobile></doc-search-mobile>
    <doc-back-to-top></doc-back-to-top>
</div>


    <div id="retype-overlay-target"></div>

    <script data-cfasync="false">window.__DOCS__ = { "title": "Compute Threads", level: 2, icon: "file", hasPrism: true, hasMermaid: true, hasMath: false, tocDepth: 23 }</script>
</body>
</html>