{"id":206939,"date":"2025-06-12T15:31:34","date_gmt":"2025-06-12T07:31:34","guid":{"rendered":"https:\/\/server.hk\/cnblog\/206939\/"},"modified":"2025-06-12T15:31:34","modified_gmt":"2025-06-12T07:31:34","slug":"go-%e5%8d%8f%e7%a8%8b%e5%a6%82%e4%bd%95%e5%ae%9e%e7%8e%b0%e7%ad%89%e5%be%85%e5%a4%9a%e4%b8%aa%e5%8d%8f%e7%a8%8b%e5%ae%8c%e6%88%90%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/206939\/","title":{"rendered":"Go \u534f\u7a0b\u5982\u4f55\u5b9e\u73b0\u7b49\u5f85\u591a\u4e2a\u534f\u7a0b\u5b8c\u6210\uff1f"},"content":{"rendered":"

\u4e00\u5206\u8015\u8018\uff0c\u4e00\u5206\u6536\u83b7\uff01\u65e2\u7136\u90fd\u6253\u5f00\u8fd9\u7bc7
\n\u300aGo \u534f\u7a0b\u5982\u4f55\u5b9e\u73b0\u7b49\u5f85\u591a\u4e2a\u534f\u7a0b\u5b8c\u6210\uff1f\u300b<\/span>\uff0c\u5c31\u575a\u6301\u770b\u4e0b\u53bb\uff0c\u5b66\u4e0b\u53bb\u5427\uff01\u672c\u6587\u4e3b\u8981\u4f1a\u7ed9\u5927\u5bb6\u8bb2\u5230
\n<\/span>\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u5982\u679c\u5927\u5bb6\u5bf9\u672c\u6587\u6709\u597d\u7684\u5efa\u8bae\u6216\u8005\u770b\u5230\u6709\u4e0d\u8db3\u4e4b\u5904\uff0c\u975e\u5e38\u6b22\u8fce\u5927\u5bb6\u79ef\u6781\u63d0\u51fa\uff01\u5728\u540e\u7eed\u6587\u7ae0\u6211\u4f1a\u7ee7\u7eed\u66f4\u65b0
\nGOLANG<\/span>\u76f8\u5173\u7684\u5185\u5bb9\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u90fd\u6709\u6240\u5e2e\u52a9\uff01,
\n,
\n\u5982\u4f55\u4f7f\u7528 go \u534f\u7a0b\u5b9e\u73b0\u7b49\u5f85\u591a\u4e2a\u534f\u7a0b<\/strong>,\u4e3a\u4e86\u5b9e\u73b0\u4e3b\u534f\u7a0b\u7b49\u5f85\u591a\u4e2a\u5b50\u534f\u7a0b\u6267\u884c\u5b8c\u6bd5\u7684\u6548\u679c\uff0c\u7c7b\u4f3c\u4e8e sync.waitgroup\uff0c\u53ef\u4ee5\u4f7f\u7528 go \u4e2d\u7684 channel \u6216 context\u3002,
\n\u4f7f\u7528 channel<\/strong>,\u901a\u8fc7\u521b\u5efa\u4e00\u4e2a\u56fa\u5b9a\u5bb9\u91cf\u7684 channel\uff0c\u53ef\u4ee5\u5b9e\u73b0\u6b64\u529f\u80fd\u3002\u5f53\u6bcf\u4e2a\u5b50\u534f\u7a0b\u5b8c\u6210\u65f6\uff0c\u5b83\u4f1a\u5411\u8fd9\u4e2a channel \u53d1\u9001\u4e00\u4e2a\u503c\u4ee5\u8868\u660e\u5b8c\u6210\u3002,
\n\u4f7f\u7528 context<\/strong>,\u4e5f\u53ef\u4ee5\u4f7f\u7528 context \u6765\u5b9e\u73b0\u7b49\u5f85\u591a\u4e2a\u534f\u7a0b\u3002context \u63d0\u4f9b\u4e86\u4e00\u79cd\u53d6\u6d88\u548c\u7ba1\u7406\u534f\u7a0b\u751f\u547d\u5468\u671f\u7684\u673a\u5236\u3002,
\n\u81ea\u5b9a\u4e49 waitgroup<\/strong>,\u53e6\u4e00\u79cd\u65b9\u5f0f\u662f\u4f7f\u7528\u81ea\u5b9a\u4e49\u7684 waitgroup \u7ed3\u6784\u4f53\uff0c\u5b83\u5c01\u88c5\u4e86 channel \u548c\u8ba1\u6570\u5668\u3002,\u597d\u4e86\uff0c\u672c\u6587\u5230\u6b64\u7ed3\u675f\uff0c\u5e26\u5927\u5bb6\u4e86\u89e3\u4e86\u300aGo \u534f\u7a0b\u5982\u4f55\u5b9e\u73b0\u7b49\u5f85\u591a\u4e2a\u534f\u7a0b\u5b8c\u6210\uff1f\u300b\uff0c\u5e0c\u671b\u672c\u6587\u5bf9\u4f60\u6709\u6240\u5e2e\u52a9\uff01\u5173\u6ce8GOLANG\u516c\u4f17\u53f7\uff0c\u7ed9\u5927\u5bb6\u5206\u4eab\u66f4\u591aGOLANG\u77e5\u8bc6\uff01,\u5982\u4f55\u4f7f\u7528 go \u534f\u7a0b\u5b9e\u73b0\u7b49\u5f85\u591a\u4e2a\u534f\u7a0b,\u4e00\u5206\u8015\u8018\uff0c\u4e00\u5206\u6536\u83b7\uff01\u65e2\u7136\u90fd\u6253\u5f00\u8fd9\u7bc7
\n\u300aGo \u534f\u7a0b\u5982\u4f55\u5b9e\u73b0\u7b49\u5f85\u591a\u4e2a\u534f\u7a0b\u5b8c\u6210\uff1f\u300b<\/span>\uff0c\u5c31\u575a\u6301\u770b\u4e0b\u53bb\uff0c\u5b66\u4e0b\u53bb\u5427\uff01\u672c\u6587\u4e3b\u8981\u4f1a\u7ed9\u5927\u5bb6\u8bb2\u5230
\n<\/span>\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u5982\u679c\u5927\u5bb6\u5bf9\u672c\u6587\u6709\u597d\u7684\u5efa\u8bae\u6216\u8005\u770b\u5230\u6709\u4e0d\u8db3\u4e4b\u5904\uff0c\u975e\u5e38\u6b22\u8fce\u5927\u5bb6\u79ef\u6781\u63d0\u51fa\uff01\u5728\u540e\u7eed\u6587\u7ae0\u6211\u4f1a\u7ee7\u7eed\u66f4\u65b0
\nGOLANG<\/span>\u76f8\u5173\u7684\u5185\u5bb9\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u90fd\u6709\u6240\u5e2e\u52a9\uff01,
\n<\/b> <\/p>\n

\u5f53\u524d\u4f4d\u7f6e\uff1a ><\/span> ><\/span> ><\/span> ><\/span> Go \u534f\u7a0b\u5982\u4f55\u5b9e\u73b0\u7b49\u5f85\u591a\u4e2a\u534f\u7a0b\u5b8c\u6210\uff1f<\/span><\/p>\n

Go \u534f\u7a0b\u5982\u4f55\u5b9e\u73b0\u7b49\u5f85\u591a\u4e2a\u534f\u7a0b\u5b8c\u6210\uff1f<\/h1>\n

2024-11-30 09:24:54<\/span>
\n<\/i>0\u6d4f\u89c8<\/span>
\n<\/i>\u6536\u85cf<\/span> <\/p>\n

\u4e00\u5206\u8015\u8018\uff0c\u4e00\u5206\u6536\u83b7\uff01\u65e2\u7136\u90fd\u6253\u5f00\u8fd9\u7bc7\u300aGo \u534f\u7a0b\u5982\u4f55\u5b9e\u73b0\u7b49\u5f85\u591a\u4e2a\u534f\u7a0b\u5b8c\u6210\uff1f\u300b<\/span>\uff0c\u5c31\u575a\u6301\u770b\u4e0b\u53bb\uff0c\u5b66\u4e0b\u53bb\u5427\uff01\u672c\u6587\u4e3b\u8981\u4f1a\u7ed9\u5927\u5bb6\u8bb2\u5230<\/span>\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u5982\u679c\u5927\u5bb6\u5bf9\u672c\u6587\u6709\u597d\u7684\u5efa\u8bae\u6216\u8005\u770b\u5230\u6709\u4e0d\u8db3\u4e4b\u5904\uff0c\u975e\u5e38\u6b22\u8fce\u5927\u5bb6\u79ef\u6781\u63d0\u51fa\uff01\u5728\u540e\u7eed\u6587\u7ae0\u6211\u4f1a\u7ee7\u7eed\u66f4\u65b0GOLANG<\/span>\u76f8\u5173\u7684\u5185\u5bb9\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u90fd\u6709\u6240\u5e2e\u52a9\uff01<\/p>\n

<\/p>\n

\u5982\u4f55\u4f7f\u7528 go \u534f\u7a0b\u5b9e\u73b0\u7b49\u5f85\u591a\u4e2a\u534f\u7a0b<\/strong><\/p>\n

\u4e3a\u4e86\u5b9e\u73b0\u4e3b\u534f\u7a0b\u7b49\u5f85\u591a\u4e2a\u5b50\u534f\u7a0b\u6267\u884c\u5b8c\u6bd5\u7684\u6548\u679c\uff0c\u7c7b\u4f3c\u4e8e sync.waitgroup\uff0c\u53ef\u4ee5\u4f7f\u7528 go \u4e2d\u7684 channel \u6216 context\u3002<\/p>\n

\u4f7f\u7528 channel<\/strong><\/p>\n

\u901a\u8fc7\u521b\u5efa\u4e00\u4e2a\u56fa\u5b9a\u5bb9\u91cf\u7684 channel\uff0c\u53ef\u4ee5\u5b9e\u73b0\u6b64\u529f\u80fd\u3002\u5f53\u6bcf\u4e2a\u5b50\u534f\u7a0b\u5b8c\u6210\u65f6\uff0c\u5b83\u4f1a\u5411\u8fd9\u4e2a channel \u53d1\u9001\u4e00\u4e2a\u503c\u4ee5\u8868\u660e\u5b8c\u6210\u3002<\/p>\n

num := 10\nch := make(chan int, num)\n\nfor i := 0; i < num; i++ {\n    go func(ch chan int, key int) {\n        \/\/ ...\n        ch <- key\n    }(ch, i)\n}\n\nfor i := 0; i < num; i++ {\n    key := <-ch\n    \/\/ ...\n}<\/pre>\n
\u4f7f\u7528 context<\/strong><\/p>\n
\u4e5f\u53ef\u4ee5\u4f7f\u7528 context \u6765\u5b9e\u73b0\u7b49\u5f85\u591a\u4e2a\u534f\u7a0b\u3002context \u63d0\u4f9b\u4e86\u4e00\u79cd\u53d6\u6d88\u548c\u7ba1\u7406\u534f\u7a0b\u751f\u547d\u5468\u671f\u7684\u673a\u5236\u3002<\/p>\n
ctx, cancel := context.withtimeout(context.background(), 10*time.second)\ndefer cancel()\n\nfor i := 0; i < num; i++ {\n    go func(ctx context.context, key int) {\n        \/\/ ...\n    }(ctx, i)\n}\n\nselect {\ncase <-ctx.done():\n    \/\/ ...\n}<\/pre>\n
\u81ea\u5b9a\u4e49 waitgroup<\/strong><\/p>\n
\u53e6\u4e00\u79cd\u65b9\u5f0f\u662f\u4f7f\u7528\u81ea\u5b9a\u4e49\u7684 waitgroup \u7ed3\u6784\u4f53\uff0c\u5b83\u5c01\u88c5\u4e86 channel \u548c\u8ba1\u6570\u5668\u3002<\/p>\n
type CustomWaitGroup struct {\n    ch  chan int\n    num int\n}\n\nfunc NewCustomWaitGroup(num int) *CustomWaitGroup {\n    return &CustomWaitGroup{\n        ch:  make(chan int, num),\n        num: num,\n    }\n}\n\nfunc (r *CustomWaitGroup) Done() {\n    r.ch <- 1\n}\n\nfunc (r *CustomWaitGroup) Wait() {\n    for i := 0; i < r.num; i++ {\n        <-r.ch\n    }\n}<\/pre>\n
\u597d\u4e86\uff0c\u672c\u6587\u5230\u6b64\u7ed3\u675f\uff0c\u5e26\u5927\u5bb6\u4e86\u89e3\u4e86\u300aGo \u534f\u7a0b\u5982\u4f55\u5b9e\u73b0\u7b49\u5f85\u591a\u4e2a\u534f\u7a0b\u5b8c\u6210\uff1f\u300b\uff0c\u5e0c\u671b\u672c\u6587\u5bf9\u4f60\u6709\u6240\u5e2e\u52a9\uff01\u5173\u6ce8GOLANG\u516c\u4f17\u53f7\uff0c\u7ed9\u5927\u5bb6\u5206\u4eab\u66f4\u591aGOLANG\u77e5\u8bc6\uff01<\/p>\n
\n
\n <\/dt>\n
\n   MySQL EXPLAIN \u4e2d filtered \u5b57\u6bb5\u7684\u771f\u5b9e\u542b\u4e49\uff1a\u503c\u8d8a\u5927\u8d8a\u597d\u8fd8\u662f\u8d8a\u5c0f\u8d8a\u597d\uff1f\n <\/dd>\n<\/dl>\n
\n
\n <\/dt>\n
\n   Win10\u9ed1\u5c4f\u540e\u65e0\u6cd5\u5524\u9192\u5c4f\u5e55\u600e\u4e48\u89e3\u51b3\n <\/dd>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"
\u4e00\u5206\u8015\u8018\uff0c\u4e00\u5206\u6536\u83b7\uff01\u65e2\u7136\u90fd\u6253\u5f00\u8fd9...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-206939","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/206939","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=206939"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/206939\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=206939"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=206939"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=206939"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}