{"id":372,"date":"2024-07-11T00:07:29","date_gmt":"2024-07-10T16:07:29","guid":{"rendered":"https:\/\/cococat.top\/?p=372"},"modified":"2025-12-28T15:42:45","modified_gmt":"2025-12-28T07:42:45","slug":"rust-note-5-pin-minimal-summary","status":"publish","type":"post","link":"https:\/\/cococat.top\/index.php\/2024\/07\/11\/rust-note-5-pin-minimal-summary\/","title":{"rendered":"rust \u7b14\u8bb0 5\uff1aPin \u76f8\u5173\u77e5\u8bc6\uff08\u6781\u7b80\u603b\u7ed3\u7248\uff09"},"content":{"rendered":"
    \n
  1. \n

    Pin<\/code> \u662f\u4e00\u4e2a\u7ed3\u6784 struct\uff0cUnpin<\/code> \u662f\u4e00\u4e2a\u7279\u5f81 trait\u3002<\/p>\n<\/li>\n

  2. \n

    Pin<\/code> \u7ed3\u6784\u4f53\u7684\u552f\u4e00\u6210\u5458\u662f\u4e00\u4e2a\u6307\u9488\uff08\u4f8b\u5982\u5f15\u7528\u548c Box<\/code>\uff09\u3002\u5b83\u7981\u6b62\u5916\u754c\u83b7\u53d6\u6307\u5411\u6570\u636e\u7684\u53ef\u53d8\u5f15\u7528\uff0c\u4ece\u800c\u4fdd\u8bc1\u6307\u5411\u7684\u6570\u636e\u4e0d\u88ab\u79fb\u52a8<\/strong>\u3002<\/p>\n<\/li>\n

  3. \n

    Unpin<\/code> \u4ee3\u8868\u6570\u636e\u53ef\u4ee5\u88ab\u5b89\u5168\u5730\u79fb\u52a8<\/strong>\uff0c!Unpin<\/code> \u5219\u53cd\u4e4b\u3002\u901a\u5e38 !Unpin<\/code> \u7684\u90fd\u662f\u81ea\u5f15\u7528\u7c7b\u578b\u3002<\/p>\n<\/li>\n

  4. \n

    \u53ef\u4ee5\u901a\u8fc7\u5f15\u5165\u4e00\u4e2a std::marker::PhantomPinned<\/code> \u6210\u5458\u6765\u4e3a\u7ed3\u6784\u4f53\u5b9e\u73b0 !Unpin<\/code>\u3002\u8fd9\u4e2a\u6807\u8bb0\u7c7b\u578b\u672c\u8eab\u662f !Unpin<\/code> \u7684\uff0c\u4e00\u65e6\u7ed3\u6784\u4f53\u5305\u542b\u4e86 !Unpin<\/code> \u6210\u5458\uff0c\u90a3\u4e48\u6574\u4e2a\u7ed3\u6784\u4f53\u5c31\u4f1a\u662f !Unpin<\/code>\u3002<\/p>\n<\/li>\n

  5. \n

    \u53ea\u6709\u5f53\u5b58\u653e\u7684\u6570\u636e\u662f !Unpin<\/code> \u7c7b\u578b\u6307\u9488\u65f6\uff0cPin<\/code> \u7684\u7279\u6027\u624d\u4f1a\u751f\u6548\u3002\u5982\u679c\u4e00\u4e2a Unpin<\/code> \u7c7b\u578b\u7684\u6307\u9488\u88ab\u653e\u5165 Pin<\/code> \u4e2d\uff0c\u5219\u8fd9\u4e2a\u64cd\u4f5c\u662f\u6ca1\u6709\u5b9e\u9645\u610f\u4e49\u7684\uff0cPin<\/code> \u4e5f\u4e0d\u4f1a\u963b\u6b62\u6570\u636e\u79fb\u52a8\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b Pin<&mut u8><\/code> \u548c &mut u8<\/code> \u51e0\u4e4e\u6ca1\u6709\u533a\u522b\u3002<\/p>\n<\/li>\n

  6. \n

    async \u51fd\u6570\u8fd4\u56de\u7684 Future \u9ed8\u8ba4\u5c31\u662f !Unpin<\/code> \u7684\uff0c\u4f46\u662f\u5f88\u591a\u65f6\u5019\u6211\u4eec\u9700\u8981\u4e00\u4e2a Unpin<\/code> \u7684 Future\u3002\u89e3\u51b3\u65b9\u6cd5\u662f\u5c06 Future \u901a\u8fc7 <Box><\/code> \u56fa\u5b9a\u5230\u5806\u4e0a\uff0c\u5c31\u80fd\u662f Unpin<\/code> \u4e86\uff0c\u518d\u901a\u8fc7 Pin<\/code> \u4fdd\u8bc1\u5176\u4e0d\u88ab\u79fb\u52a8\uff0c\u5373\u6700\u7ec8\u83b7\u53d6\u4e00\u4e2a Pin<Box<Future>><\/code>\u3002<\/p>\n

    \n

    \u4f8b\u5982\u5e38\u89c1\u7684\u7ea6\u675f\u53ef\u80fd\u662f\uff1a<\/p>\n

    fn execute_unpin_future(x: impl Future + Unpin) {\/* ... *\/ }<\/code><\/pre>\n
    \u90a3\u4e48 Pin<Box<Fut>><\/code> \u5373\u6ee1\u8db3\u4e86 impl Future<\/code>\uff0c\u53c8\u80fd\u5b9e\u73b0 Unpin<\/code>.<\/p>\n<\/blockquote>\n<\/li>\n
  7. \n
    \u4e5f\u53ef\u4ee5 Pin<\/code> \u5230\u6808\u4e0a\uff0c\u4f46\u662f\u9664\u975e\u662f Unpin<\/code>\u7684\u7c7b\u578b\uff0c\u5426\u5219\u5c31\u5fc5\u987b\u4f7f\u7528 unsafe\uff08Pin::new_unchecked<\/code> or std::pin::pin!<\/code>\uff09\u3002\u6b64\u5916\uff0c\u51fd\u6570\u8fd4\u56de\u65f6\u6808\u5e27\u4f1a\u91ca\u653e\uff0c\u800c\u4e14 rust \u7f16\u8bd1\u4f18\u5316\u53ef\u80fd\u4f1a\u5728\u6808\u5e27\u5185\u79fb\u52a8\u6570\u636e\u3002\u56e0\u6b64\uff0c\u5c3d\u91cf\u4e0d\u8981\u8fd9\u4e48\u505a\u3002<\/p>\n<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"
    Pin \u662f\u4e00\u4e2a\u7ed3\u6784 struct\uff0cUnpin \u662f\u4e00\u4e2a\u7279\u5f81 trait\u3002 Pin \u7ed3\u6784\u4f53\u7684\u552f\u4e00\u6210\u5458\u662f\u4e00\u4e2a\u6307\u9488\uff08\u4f8b […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[24],"class_list":["post-372","post","type-post","status-publish","format-standard","hentry","category-rust","tag-rust"],"_links":{"self":[{"href":"https:\/\/cococat.top\/index.php\/wp-json\/wp\/v2\/posts\/372","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cococat.top\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cococat.top\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cococat.top\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/cococat.top\/index.php\/wp-json\/wp\/v2\/comments?post=372"}],"version-history":[{"count":1,"href":"https:\/\/cococat.top\/index.php\/wp-json\/wp\/v2\/posts\/372\/revisions"}],"predecessor-version":[{"id":584,"href":"https:\/\/cococat.top\/index.php\/wp-json\/wp\/v2\/posts\/372\/revisions\/584"}],"wp:attachment":[{"href":"https:\/\/cococat.top\/index.php\/wp-json\/wp\/v2\/media?parent=372"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cococat.top\/index.php\/wp-json\/wp\/v2\/categories?post=372"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cococat.top\/index.php\/wp-json\/wp\/v2\/tags?post=372"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}