{"id":57882,"date":"2024-10-10T21:55:35","date_gmt":"2024-10-10T13:55:35","guid":{"rendered":"https:\/\/server.hk\/cnblog\/57882\/"},"modified":"2024-10-10T21:55:35","modified_gmt":"2024-10-10T13:55:35","slug":"go%e6%95%99%e7%a8%8b-go-%e8%aa%9e%e8%a8%80%e5%9e%83%e5%9c%be%e5%9b%9e%e6%94%b6%e5%92%8c-setfinalizer","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/57882\/","title":{"rendered":"GO\u6559\u7a0b: Go \u8a9e\u8a00\u5783\u573e\u56de\u6536\u548c SetFinalizer"},"content":{"rendered":"<h1 id=\"go%e6%95%99%e7%a8%8b-go-%e8%aa%9e%e8%a8%80%e5%9e%83%e5%9c%be%e5%9b%9e%e6%94%b6%e5%92%8c-setfinalizer-gMTbgFpffC\">GO\u6559\u7a0b: Go \u8a9e\u8a00\u5783\u573e\u56de\u6536\u548c SetFinalizer<\/h1>\n<p>\u5728\u73fe\u4ee3\u7de8\u7a0b\u8a9e\u8a00\u4e2d\uff0c\u5167\u5b58\u7ba1\u7406\u662f\u4e00\u500b\u81f3\u95dc\u91cd\u8981\u7684\u8a71\u984c\u3002Go \u8a9e\u8a00\uff08\u53c8\u7a31 Golang\uff09\u4ee5\u5176\u7c21\u6f54\u7684\u8a9e\u6cd5\u548c\u9ad8\u6548\u7684\u6027\u80fd\u800c\u53d7\u5230\u5ee3\u6cdb\u6b61\u8fce\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e Go \u8a9e\u8a00\u7684\u5783\u573e\u56de\u6536\u6a5f\u5236\u53ca\u5176 SetFinalizer \u51fd\u6578\u7684\u4f7f\u7528\u3002<\/p>\n<h2 id=\"go-%e8%aa%9e%e8%a8%80%e7%9a%84%e5%9e%83%e5%9c%be%e5%9b%9e%e6%94%b6%e6%a9%9f%e5%88%b6-gMTbgFpffC\">Go \u8a9e\u8a00\u7684\u5783\u573e\u56de\u6536\u6a5f\u5236<\/h2>\n<p>Go \u8a9e\u8a00\u7684\u5783\u573e\u56de\u6536\uff08Garbage Collection, GC\uff09\u662f\u4e00\u7a2e\u81ea\u52d5\u5167\u5b58\u7ba1\u7406\u7684\u6a5f\u5236\uff0c\u65e8\u5728\u91cb\u653e\u4e0d\u518d\u4f7f\u7528\u7684\u5167\u5b58\u3002\u9019\u4e00\u6a5f\u5236\u4f7f\u5f97\u958b\u767c\u8005\u4e0d\u5fc5\u624b\u52d5\u7ba1\u7406\u5167\u5b58\uff0c\u5f9e\u800c\u6e1b\u5c11\u4e86\u5167\u5b58\u6cc4\u6f0f\u548c\u5176\u4ed6\u76f8\u95dc\u932f\u8aa4\u7684\u98a8\u96aa\u3002<\/p>\n<p>Go \u7684\u5783\u573e\u56de\u6536\u5668\u4f7f\u7528\u6a19\u8a18-\u6e05\u9664\uff08mark-and-sweep\uff09\u7b97\u6cd5\u3002\u9019\u4e00\u904e\u7a0b\u4e3b\u8981\u5206\u70ba\u5169\u500b\u968e\u6bb5\uff1a<\/p>\n<ul>\n<li><strong>\u6a19\u8a18\u968e\u6bb5\uff1a<\/strong>\u5783\u573e\u56de\u6536\u5668\u6703\u904d\u6b77\u6240\u6709\u7684\u6839\u5c0d\u8c61\uff08\u5982\u5168\u5c40\u8b8a\u91cf\u548c\u7576\u524d\u5806\u68e7\u4e2d\u7684\u8b8a\u91cf\uff09\uff0c\u4e26\u6a19\u8a18\u6240\u6709\u53ef\u9054\u7684\u5c0d\u8c61\u3002<\/li>\n<li><strong>\u6e05\u9664\u968e\u6bb5\uff1a<\/strong>\u5728\u6a19\u8a18\u5b8c\u6210\u5f8c\uff0c\u5783\u573e\u56de\u6536\u5668\u6703\u6e05\u9664\u6240\u6709\u672a\u88ab\u6a19\u8a18\u7684\u5c0d\u8c61\uff0c\u91cb\u653e\u5176\u4f54\u7528\u7684\u5167\u5b58\u3002<\/li>\n<\/ul>\n<p>Go \u7684\u5783\u573e\u56de\u6536\u5668\u662f\u4e26\u884c\u7684\uff0c\u9019\u610f\u5473\u8457\u5b83\u53ef\u4ee5\u5728\u591a\u500b CPU \u6838\u5fc3\u4e0a\u540c\u6642\u904b\u884c\uff0c\u5f9e\u800c\u63d0\u9ad8\u4e86\u6027\u80fd\u3002\u9019\u4e00\u7279\u6027\u4f7f\u5f97 Go \u5728\u8655\u7406\u9ad8\u4f75\u767c\u7684\u61c9\u7528\u6642\u8868\u73fe\u51fa\u8272\u3002<\/p>\n<h2 id=\"setfinalizer-%e5%87%bd%e6%95%b8%e7%9a%84%e4%bd%bf%e7%94%a8-gMTbgFpffC\">SetFinalizer \u51fd\u6578\u7684\u4f7f\u7528<\/h2>\n<p>\u5728 Go \u8a9e\u8a00\u4e2d\uff0cSetFinalizer \u51fd\u6578\u5141\u8a31\u958b\u767c\u8005\u5728\u5c0d\u8c61\u88ab\u5783\u573e\u56de\u6536\u4e4b\u524d\u57f7\u884c\u7279\u5b9a\u7684\u6e05\u7406\u64cd\u4f5c\u3002\u9019\u5c0d\u65bc\u9700\u8981\u91cb\u653e\u5916\u90e8\u8cc7\u6e90\uff08\u5982\u6587\u4ef6\u53e5\u67c4\u6216\u7db2\u7d61\u9023\u63a5\uff09\u7684\u5c0d\u8c61\u7279\u5225\u6709\u7528\u3002<\/p>\n<p>SetFinalizer \u7684\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>func SetFinalizer(obj interface{}, finalizer interface{})<\/code><\/pre>\n<p>\u9019\u88e1\uff0c<code>obj<\/code> \u662f\u9700\u8981\u8a2d\u7f6e\u7d42\u7d50\u5668\u7684\u5c0d\u8c61\uff0c\u800c <code>finalizer<\/code> \u662f\u4e00\u500b\u51fd\u6578\uff0c\u7576 <code>obj<\/code> \u88ab\u5783\u573e\u56de\u6536\u6642\u5c07\u88ab\u8abf\u7528\u3002<\/p>\n<h3 id=\"%e7%a4%ba%e4%be%8b%e4%bb%a3%e7%a2%bc-gMTbgFpffC\">\u793a\u4f8b\u4ee3\u78bc<\/h3>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u4f7f\u7528 SetFinalizer \u7684\u7c21\u55ae\u793a\u4f8b\uff1a<\/p>\n<pre><code>package main\n\nimport (\n    \"fmt\"\n    \"runtime\"\n)\n\ntype Resource struct {\n    name string\n}\n\nfunc (r *Resource) cleanup() {\n    fmt.Printf(\"Cleaning up resource: %sn\", r.name)\n}\n\nfunc main() {\n    r := &amp;Resource{name: \"MyResource\"}\n    runtime.SetFinalizer(r, (*Resource).cleanup)\n\n    \/\/ \u6a21\u64ec\u4f7f\u7528\u8cc7\u6e90\n    fmt.Println(\"Using resource:\", r.name)\n\n    \/\/ \u8b93 r \u8b8a\u70ba\u4e0d\u53ef\u9054\n    r = nil\n\n    \/\/ \u5f37\u5236\u5783\u573e\u56de\u6536\n    runtime.GC()\n\n    \/\/ \u7b49\u5f85\u4e00\u6bb5\u6642\u9593\u4ee5\u78ba\u4fdd\u7d42\u7d50\u5668\u88ab\u8abf\u7528\n    fmt.Println(\"Waiting for finalizer...\")\n    runtime.GC()\n}\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0c\u6211\u5011\u5275\u5efa\u4e86\u4e00\u500b\u540d\u70ba <code>Resource<\/code> \u7684\u7d50\u69cb\u9ad4\uff0c\u4e26\u70ba\u5176\u8a2d\u7f6e\u4e86\u4e00\u500b\u6e05\u7406\u51fd\u6578 <code>cleanup<\/code>\u3002\u7576 <code>Resource<\/code> \u5c0d\u8c61\u88ab\u5783\u573e\u56de\u6536\u6642\uff0c<code>cleanup<\/code> \u51fd\u6578\u5c07\u88ab\u81ea\u52d5\u8abf\u7528\uff0c\u5f9e\u800c\u91cb\u653e\u8cc7\u6e90\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-gMTbgFpffC\">\u7d50\u8ad6<\/h2>\n<p>Go \u8a9e\u8a00\u7684\u5783\u573e\u56de\u6536\u6a5f\u5236\u548c SetFinalizer \u51fd\u6578\u70ba\u958b\u767c\u8005\u63d0\u4f9b\u4e86\u5f37\u5927\u7684\u5167\u5b58\u7ba1\u7406\u5de5\u5177\u3002\u901a\u904e\u81ea\u52d5\u91cb\u653e\u4e0d\u518d\u4f7f\u7528\u7684\u5167\u5b58\u548c\u5728\u5c0d\u8c61\u88ab\u56de\u6536\u524d\u57f7\u884c\u6e05\u7406\u64cd\u4f5c\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u5c08\u6ce8\u65bc\u696d\u52d9\u908f\u8f2f\uff0c\u800c\u4e0d\u5fc5\u64d4\u5fc3\u5167\u5b58\u7ba1\u7406\u7684\u7d30\u7bc0\u3002<\/p>\n<p>\u5982\u679c\u60a8\u5c0d\u65bc\u5982\u4f55\u5728 Go \u8a9e\u8a00\u4e2d\u6709\u6548\u5730\u7ba1\u7406\u5167\u5b58\u6709\u66f4\u591a\u7684\u8208\u8da3\uff0c\u6216\u5e0c\u671b\u4e86\u89e3\u66f4\u591a\u95dc\u65bc <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u7684\u8cc7\u8a0a\uff0c\u8acb\u96a8\u6642\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3 Go \u8a9e\u8a00\u7684\u5783\u573e\u56de\u6536\u6a5f\u5236\u53ca SetFinalizer \u7684\u4f7f\u7528\uff0c\u63d0\u5347\u5167\u5b58\u7ba1\u7406\u6548\u7387\uff0c\u512a\u5316\u61c9\u7528\u6027\u80fd\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4924],"tags":[],"class_list":["post-57882","post","type-post","status-publish","format-standard","hentry","category-setup-tutorials"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/57882","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=57882"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/57882\/revisions"}],"predecessor-version":[{"id":57883,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/57882\/revisions\/57883"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=57882"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=57882"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=57882"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}