{"id":206654,"date":"2025-06-12T15:01:53","date_gmt":"2025-06-12T07:01:53","guid":{"rendered":"https:\/\/server.hk\/cnblog\/206654\/"},"modified":"2025-06-12T15:01:53","modified_gmt":"2025-06-12T07:01:53","slug":"go-%e4%b8%ad%e4%bd%bf%e7%94%a8-context-%e5%8c%85%e6%97%b6%ef%bc%8c%e6%89%a7%e8%a1%8c-cancel-%e5%90%8e","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/206654\/","title":{"rendered":"Go \u4e2d\u4f7f\u7528 context \u5305\u65f6\uff0c\u6267\u884c Cancel \u540e"},"content":{"rendered":"

\u4f60\u5728\u5b66\u4e60
\nGOLANG<\/span>\u76f8\u5173\u7684\u77e5\u8bc6\u5417\uff1f\u672c\u6587
\n\u300aGo \u4e2d\u4f7f\u7528 context \u5305\u65f6\uff0c\u6267\u884c Cancel \u540e\u300b<\/span>\uff0c\u4e3b\u8981\u4ecb\u7ecd\u7684\u5185\u5bb9\u5c31\u6d89\u53ca\u5230
\n<\/span>\uff0c\u5982\u679c\u4f60\u60f3\u63d0\u5347\u81ea\u5df1\u7684\u5f00\u53d1\u80fd\u529b\uff0c\u5c31\u4e0d\u8981\u9519\u8fc7\u8fd9\u7bc7\u6587\u7ae0\uff0c\u5927\u5bb6\u8981\u77e5\u9053\u7f16\u7a0b\u7406\u8bba\u57fa\u7840\u548c\u5b9e\u6218\u64cd\u4f5c\u90fd\u662f\u4e0d\u53ef\u6216\u7f3a\u7684\u54e6\uff01,
\n,
\ncontext \u6267\u884c cancel\uff0c\u4f46 <- ctx.done() \u6ca1\u6267\u884c\uff1f<\/strong>,\u5728 go \u4e2d\u4f7f\u7528 context \u5305\u65f6\uff0c\u9047\u5230\u4e00\u4e2a\u95ee\u9898\uff1a\u6267\u884c\u4e86 ctx.done() \u53d6\u6d88\u4e86 context\uff0c\u4f46 goroutine \u4e2d\u7684 <- ctx.done() \u5374\u6ca1\u6709\u6267\u884c\uff0c\u8fd9\u5bfc\u81f4\u7a0b\u5e8f\u65e0\u6cd5\u6b63\u5e38\u9000\u51fa\u3002,\u8fd9\u4e2a\u95ee\u9898\u7684\u672c\u8d28\u662f\u963b\u585e\u5728 channel \u5199\u5165\u64cd\u4f5c\u4e0a\u3002\u5728\u7ed9\u51fa\u7684\u4ee3\u7801\u793a\u4f8b\u4e2d\uff0cgoroutine \u7684 select \u8bed\u53e5\u963b\u585e\u5728 ch <- n \u4e2d\uff1a,\u5f53\u6267\u884c cancel() \u53d6\u6d88 context \u65f6\uff0c\u867d\u7136 ctx.done() \u8fd4\u56de\u4e86\uff0c\u4f46\u6b64\u65f6 goroutine \u4ecd\u7136\u963b\u585e\u5728 ch <- n \u4e2d\uff0c\u56e0\u6b64\u4e0d\u4f1a\u6267\u884c <- ctx.done()\u3002,\u8981\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\uff0c\u4e00\u79cd\u65b9\u6cd5\u662f\u5173\u95ed channel\uff0c\u4ee5\u6307\u793a goroutine \u7ec8\u6b62\uff1a,\u5173\u95ed channel \u540e\uff0crange \u904d\u5386\u4f1a\u7ed3\u675f\uff0cgoroutine \u4e5f\u80fd\u6b63\u5e38\u9000\u51fa\u3002,\u4ee5\u4e0a\u5c31\u662f\u300aGo \u4e2d\u4f7f\u7528 context \u5305\u65f6\uff0c\u6267\u884c Cancel \u540e\u300b\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u5173\u4e8e\u7684\u8d44\u6599\u8bf7\u5173\u6ce8GOLANG\u516c\u4f17\u53f7\uff01,context \u6267\u884c cancel\uff0c\u4f46 <- ctx.done() \u6ca1\u6267\u884c\uff1f,\u4f60\u5728\u5b66\u4e60
\nGOLANG<\/span>\u76f8\u5173\u7684\u77e5\u8bc6\u5417\uff1f\u672c\u6587
\n\u300aGo \u4e2d\u4f7f\u7528 context \u5305\u65f6\uff0c\u6267\u884c Cancel \u540e\u300b<\/span>\uff0c\u4e3b\u8981\u4ecb\u7ecd\u7684\u5185\u5bb9\u5c31\u6d89\u53ca\u5230
\n<\/span>\uff0c\u5982\u679c\u4f60\u60f3\u63d0\u5347\u81ea\u5df1\u7684\u5f00\u53d1\u80fd\u529b\uff0c\u5c31\u4e0d\u8981\u9519\u8fc7\u8fd9\u7bc7\u6587\u7ae0\uff0c\u5927\u5bb6\u8981\u77e5\u9053\u7f16\u7a0b\u7406\u8bba\u57fa\u7840\u548c\u5b9e\u6218\u64cd\u4f5c\u90fd\u662f\u4e0d\u53ef\u6216\u7f3a\u7684\u54e6\uff01,
\n<\/b> <\/p>\n

\u5f53\u524d\u4f4d\u7f6e\uff1a ><\/span> ><\/span> ><\/span> ><\/span> Go \u4e2d\u4f7f\u7528 context \u5305\u65f6\uff0c\u6267\u884c Cancel \u540e<\/span><\/p>\n

Go \u4e2d\u4f7f\u7528 context \u5305\u65f6\uff0c\u6267\u884c Cancel \u540e<\/h1>\n

2024-11-18 14:34:05<\/span>
\n<\/i>0\u6d4f\u89c8<\/span>
\n<\/i>\u6536\u85cf<\/span> <\/p>\n

\u4f60\u5728\u5b66\u4e60GOLANG<\/span>\u76f8\u5173\u7684\u77e5\u8bc6\u5417\uff1f\u672c\u6587\u300aGo \u4e2d\u4f7f\u7528 context \u5305\u65f6\uff0c\u6267\u884c Cancel \u540e\u300b<\/span>\uff0c\u4e3b\u8981\u4ecb\u7ecd\u7684\u5185\u5bb9\u5c31\u6d89\u53ca\u5230<\/span>\uff0c\u5982\u679c\u4f60\u60f3\u63d0\u5347\u81ea\u5df1\u7684\u5f00\u53d1\u80fd\u529b\uff0c\u5c31\u4e0d\u8981\u9519\u8fc7\u8fd9\u7bc7\u6587\u7ae0\uff0c\u5927\u5bb6\u8981\u77e5\u9053\u7f16\u7a0b\u7406\u8bba\u57fa\u7840\u548c\u5b9e\u6218\u64cd\u4f5c\u90fd\u662f\u4e0d\u53ef\u6216\u7f3a\u7684\u54e6\uff01<\/p>\n

<\/p>\n

context \u6267\u884c cancel\uff0c\u4f46 <- ctx.done() \u6ca1\u6267\u884c\uff1f<\/strong><\/p>\n

\u5728 go \u4e2d\u4f7f\u7528 context \u5305\u65f6\uff0c\u9047\u5230\u4e00\u4e2a\u95ee\u9898\uff1a\u6267\u884c\u4e86 ctx.done() \u53d6\u6d88\u4e86 context\uff0c\u4f46 goroutine \u4e2d\u7684 <- ctx.done() \u5374\u6ca1\u6709\u6267\u884c\uff0c\u8fd9\u5bfc\u81f4\u7a0b\u5e8f\u65e0\u6cd5\u6b63\u5e38\u9000\u51fa\u3002<\/p>\n

\u8fd9\u4e2a\u95ee\u9898\u7684\u672c\u8d28\u662f\u963b\u585e\u5728 channel \u5199\u5165\u64cd\u4f5c\u4e0a\u3002\u5728\u7ed9\u51fa\u7684\u4ee3\u7801\u793a\u4f8b\u4e2d\uff0cgoroutine \u7684 select \u8bed\u53e5\u963b\u585e\u5728 ch <- n \u4e2d\uff1a<\/p>\n

    for {\n        select {\n        case <-ctx.done():\n            fmt.println(\"done\")\n        default:\n            n += 1\n            ch <- n\n        }\n    }<\/pre>\n
\u5f53\u6267\u884c cancel() \u53d6\u6d88 context \u65f6\uff0c\u867d\u7136 ctx.done() \u8fd4\u56de\u4e86\uff0c\u4f46\u6b64\u65f6 goroutine \u4ecd\u7136\u963b\u585e\u5728 ch <- n \u4e2d\uff0c\u56e0\u6b64\u4e0d\u4f1a\u6267\u884c <- ctx.done()\u3002<\/p>\n
\u8981\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\uff0c\u4e00\u79cd\u65b9\u6cd5\u662f\u5173\u95ed channel\uff0c\u4ee5\u6307\u793a goroutine \u7ec8\u6b62\uff1a<\/p>\n
    for {\n        select {\n        case <-ctx.Done():\n            fmt.Println(\"done\")\n            close(ch) \/\/ \u5173\u95ed channel\n            return\n        default:\n            n += 1\n            ch <- n\n        }\n    }<\/pre>\n
\u5173\u95ed channel \u540e\uff0crange \u904d\u5386\u4f1a\u7ed3\u675f\uff0cgoroutine \u4e5f\u80fd\u6b63\u5e38\u9000\u51fa\u3002<\/p>\n
\u4ee5\u4e0a\u5c31\u662f\u300aGo \u4e2d\u4f7f\u7528 context \u5305\u65f6\uff0c\u6267\u884c Cancel \u540e\u300b\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u5173\u4e8e\u7684\u8d44\u6599\u8bf7\u5173\u6ce8GOLANG\u516c\u4f17\u53f7\uff01<\/p>\n
\n
\n <\/dt>\n
\n   Win11\u7a0b\u5e8f\u517c\u5bb9\u6027\u52a9\u624b\u600e\u4e48\u5173\u95ed Win11\u7a0b\u5e8f\u517c\u5bb9\u6027\u52a9\u624b\u5173\u95ed\u65b9\u6cd5\n <\/dd>\n<\/dl>\n
\n
\n <\/dt>\n
\n   \u7d22\u5c3c\u76f8\u673acmos\u578b\u53f7\n <\/dd>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"
\u4f60\u5728\u5b66\u4e60 GOLANG\u76f8\u5173\u7684\u77e5\u8bc6...<\/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-206654","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/206654","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=206654"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/206654\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=206654"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=206654"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=206654"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}