{"id":206810,"date":"2025-06-12T15:06:06","date_gmt":"2025-06-12T07:06:06","guid":{"rendered":"https:\/\/server.hk\/cnblog\/206810\/"},"modified":"2025-06-12T15:06:06","modified_gmt":"2025-06-12T07:06:06","slug":"go-%e4%b8%ad%e5%a6%82%e4%bd%95%e5%bb%b6%e8%bf%9f%e6%89%a7%e8%a1%8c-cancel-%e4%ba%8b%e4%bb%b6%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/206810\/","title":{"rendered":"Go \u4e2d\u5982\u4f55\u5ef6\u8fdf\u6267\u884c Cancel \u4e8b\u4ef6\uff1f"},"content":{"rendered":"

\u54c8\u55bd\uff01\u4eca\u5929\u5fc3\u8840\u6765\u6f6e\u7ed9\u5927\u5bb6\u5e26\u6765\u4e86
\n\u300aGo \u4e2d\u5982\u4f55\u5ef6\u8fdf\u6267\u884c Cancel \u4e8b\u4ef6\uff1f\u300b<\/span>\uff0c\u60f3\u5fc5\u5927\u5bb6\u5e94\u8be5\u5bf9
\nGOLANG<\/span>\u90fd\u4e0d\u964c\u751f\u5427\uff0c\u90a3\u4e48\u9605\u8bfb\u672c\u6587\u5c31\u90fd\u4e0d\u4f1a\u5f88\u56f0\u96be\uff0c\u4ee5\u4e0b\u5185\u5bb9\u4e3b\u8981\u6d89\u53ca\u5230
\n<\/span>\uff0c\u82e5\u662f\u4f60\u6b63\u5728\u5b66\u4e60
\nGOLANG<\/span>\uff0c\u5343\u4e07\u522b\u9519\u8fc7\u8fd9\u7bc7\u6587\u7ae0~\u5e0c\u671b\u80fd\u5e2e\u52a9\u5230\u4f60\uff01,
\n,
\ngo \u4e2d\u5728 select \u8bed\u53e5\u4e2d\u5ef6\u8fdf\u6267\u884c cancel \u4e8b\u4ef6<\/strong>,\u5728 go \u7f16\u7a0b\u4e2d\uff0c\u6709\u65f6\u9700\u8981\u5728\u63a5\u6536 ctx.done() \u53d6\u6d88\u4fe1\u53f7\u540e\uff0c\u518d\u6267\u884c\u4e00\u4e9b\u540e\u7eed\u64cd\u4f5c\u3002\u672c\u6587\u4ecb\u7ecd\u4e86\u5982\u4f55\u5728\u4e00\u4e2a select \u8bed\u53e5\u4e2d\u5ef6\u8fdf\u6267\u884c\u53d6\u6d88\u4e8b\u4ef6\uff0c\u800c\u65e0\u9700\u76f4\u63a5\u5728 ctx.done() \u5904\u6267\u884c\u540e\u7eed\u64cd\u4f5c\u3002,
\n\u95ee\u9898\u63cf\u8ff0<\/strong>,\u539f\u95ee\u9898\u4e2d\u63cf\u8ff0\u4e86\u8fd9\u6837\u4e00\u4e2a\u573a\u666f\uff1a\u5728\u63a5\u6536\u5230 ctx.done() \u6d88\u606f\u65f6\uff0c\u5f00\u53d1\u8005\u5e0c\u671b\u6267\u884c ticker.c \u4ee3\u7801\u4e00\u6b21\uff0c\u7136\u540e\u518d\u8fd4\u56de\u3002,
\n\u89e3\u51b3\u65b9\u6848<\/strong>,\u4e3a\u4e86\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\uff0c\u53ef\u4ee5\u4f7f\u7528 select \u8bed\u53e5\u7684 fallthrough \u8bed\u53e5\u3002\u4ee5\u4e0b\u662f\u5b9e\u73b0\u6b64\u529f\u80fd\u7684\u4ee3\u7801\u793a\u4f8b\uff1a,\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0cshouldreturn \u53d8\u91cf\u7528\u4e8e\u8ddf\u8e2a\u662f\u5426\u5e94\u8be5\u8fd4\u56de\u3002\u5f53\u63a5\u6536\u5230 ctx.done() \u65f6\uff0cshouldreturn \u88ab\u8bbe\u7f6e\u4e3a true\uff0c\u5e76\u4e14 fallthrough \u8bed\u53e5\u5141\u8bb8\u6267\u884c ticker.c \u4ee3\u7801\u3002\u5982\u679c\u5728\u6267\u884c ticker.c \u4ee3\u7801\u540e shouldreturn \u4e3a true\uff0c\u5219\u51fd\u6570\u5c06\u8fd4\u56de\u3002,\u901a\u8fc7\u8fd9\u79cd\u65b9\u5f0f\uff0c\u53ef\u4ee5\u5728\u63a5\u6536\u5230\u53d6\u6d88\u4fe1\u53f7\u540e\u5ef6\u8fdf\u6267\u884c ticker.c \u4ee3\u7801\uff0c\u540c\u65f6\u4ecd\u7136\u53ef\u4ee5\u6839\u636e\u9700\u8981\u5728\u8be5\u4ee3\u7801\u6267\u884c\u540e\u8fd4\u56de\u3002,\u4ee5\u4e0a\u5c31\u662f\u300aGo \u4e2d\u5982\u4f55\u5ef6\u8fdf\u6267\u884c Cancel \u4e8b\u4ef6\uff1f\u300b\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u5173\u4e8e\u7684\u8d44\u6599\u8bf7\u5173\u6ce8GOLANG\u516c\u4f17\u53f7\uff01,go \u4e2d\u5728 select \u8bed\u53e5\u4e2d\u5ef6\u8fdf\u6267\u884c cancel \u4e8b\u4ef6,\u54c8\u55bd\uff01\u4eca\u5929\u5fc3\u8840\u6765\u6f6e\u7ed9\u5927\u5bb6\u5e26\u6765\u4e86
\n\u300aGo \u4e2d\u5982\u4f55\u5ef6\u8fdf\u6267\u884c Cancel \u4e8b\u4ef6\uff1f\u300b<\/span>\uff0c\u60f3\u5fc5\u5927\u5bb6\u5e94\u8be5\u5bf9
\nGOLANG<\/span>\u90fd\u4e0d\u964c\u751f\u5427\uff0c\u90a3\u4e48\u9605\u8bfb\u672c\u6587\u5c31\u90fd\u4e0d\u4f1a\u5f88\u56f0\u96be\uff0c\u4ee5\u4e0b\u5185\u5bb9\u4e3b\u8981\u6d89\u53ca\u5230
\n<\/span>\uff0c\u82e5\u662f\u4f60\u6b63\u5728\u5b66\u4e60
\nGOLANG<\/span>\uff0c\u5343\u4e07\u522b\u9519\u8fc7\u8fd9\u7bc7\u6587\u7ae0~\u5e0c\u671b\u80fd\u5e2e\u52a9\u5230\u4f60\uff01,
\n<\/b> <\/p>\n

\u5f53\u524d\u4f4d\u7f6e\uff1a ><\/span> ><\/span> ><\/span> ><\/span> Go \u4e2d\u5982\u4f55\u5ef6\u8fdf\u6267\u884c Cancel \u4e8b\u4ef6\uff1f<\/span><\/p>\n

Go \u4e2d\u5982\u4f55\u5ef6\u8fdf\u6267\u884c Cancel \u4e8b\u4ef6\uff1f<\/h1>\n

2024-11-24 15:19:07<\/span>
\n<\/i>0\u6d4f\u89c8<\/span>
\n<\/i>\u6536\u85cf<\/span> <\/p>\n

\u54c8\u55bd\uff01\u4eca\u5929\u5fc3\u8840\u6765\u6f6e\u7ed9\u5927\u5bb6\u5e26\u6765\u4e86\u300aGo \u4e2d\u5982\u4f55\u5ef6\u8fdf\u6267\u884c Cancel \u4e8b\u4ef6\uff1f\u300b<\/span>\uff0c\u60f3\u5fc5\u5927\u5bb6\u5e94\u8be5\u5bf9GOLANG<\/span>\u90fd\u4e0d\u964c\u751f\u5427\uff0c\u90a3\u4e48\u9605\u8bfb\u672c\u6587\u5c31\u90fd\u4e0d\u4f1a\u5f88\u56f0\u96be\uff0c\u4ee5\u4e0b\u5185\u5bb9\u4e3b\u8981\u6d89\u53ca\u5230<\/span>\uff0c\u82e5\u662f\u4f60\u6b63\u5728\u5b66\u4e60GOLANG<\/span>\uff0c\u5343\u4e07\u522b\u9519\u8fc7\u8fd9\u7bc7\u6587\u7ae0~\u5e0c\u671b\u80fd\u5e2e\u52a9\u5230\u4f60\uff01<\/p>\n

<\/p>\n

go \u4e2d\u5728 select \u8bed\u53e5\u4e2d\u5ef6\u8fdf\u6267\u884c cancel \u4e8b\u4ef6<\/strong><\/p>\n

\u5728 go \u7f16\u7a0b\u4e2d\uff0c\u6709\u65f6\u9700\u8981\u5728\u63a5\u6536 ctx.done() \u53d6\u6d88\u4fe1\u53f7\u540e\uff0c\u518d\u6267\u884c\u4e00\u4e9b\u540e\u7eed\u64cd\u4f5c\u3002\u672c\u6587\u4ecb\u7ecd\u4e86\u5982\u4f55\u5728\u4e00\u4e2a select \u8bed\u53e5\u4e2d\u5ef6\u8fdf\u6267\u884c\u53d6\u6d88\u4e8b\u4ef6\uff0c\u800c\u65e0\u9700\u76f4\u63a5\u5728 ctx.done() \u5904\u6267\u884c\u540e\u7eed\u64cd\u4f5c\u3002<\/p>\n

\u95ee\u9898\u63cf\u8ff0<\/strong><\/p>\n

\u539f\u95ee\u9898\u4e2d\u63cf\u8ff0\u4e86\u8fd9\u6837\u4e00\u4e2a\u573a\u666f\uff1a\u5728\u63a5\u6536\u5230 ctx.done() \u6d88\u606f\u65f6\uff0c\u5f00\u53d1\u8005\u5e0c\u671b\u6267\u884c ticker.c \u4ee3\u7801\u4e00\u6b21\uff0c\u7136\u540e\u518d\u8fd4\u56de\u3002<\/p>\n

\u89e3\u51b3\u65b9\u6848<\/strong><\/p>\n

\u4e3a\u4e86\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\uff0c\u53ef\u4ee5\u4f7f\u7528 select \u8bed\u53e5\u7684 fallthrough \u8bed\u53e5\u3002\u4ee5\u4e0b\u662f\u5b9e\u73b0\u6b64\u529f\u80fd\u7684\u4ee3\u7801\u793a\u4f8b\uff1a<\/p>\n

select {\ncase <-ctx.Done():\n  shouldReturn = true\n  fallthrough\ncase <-ticker.C:\n  \/\/ execution your code ...\n  if shouldReturn {\n    return\n  }\n}<\/pre>\n
\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0cshouldreturn \u53d8\u91cf\u7528\u4e8e\u8ddf\u8e2a\u662f\u5426\u5e94\u8be5\u8fd4\u56de\u3002\u5f53\u63a5\u6536\u5230 ctx.done() \u65f6\uff0cshouldreturn \u88ab\u8bbe\u7f6e\u4e3a true\uff0c\u5e76\u4e14 fallthrough \u8bed\u53e5\u5141\u8bb8\u6267\u884c ticker.c \u4ee3\u7801\u3002\u5982\u679c\u5728\u6267\u884c ticker.c \u4ee3\u7801\u540e shouldreturn \u4e3a true\uff0c\u5219\u51fd\u6570\u5c06\u8fd4\u56de\u3002<\/p>\n
\u901a\u8fc7\u8fd9\u79cd\u65b9\u5f0f\uff0c\u53ef\u4ee5\u5728\u63a5\u6536\u5230\u53d6\u6d88\u4fe1\u53f7\u540e\u5ef6\u8fdf\u6267\u884c ticker.c \u4ee3\u7801\uff0c\u540c\u65f6\u4ecd\u7136\u53ef\u4ee5\u6839\u636e\u9700\u8981\u5728\u8be5\u4ee3\u7801\u6267\u884c\u540e\u8fd4\u56de\u3002<\/p>\n
\u4ee5\u4e0a\u5c31\u662f\u300aGo \u4e2d\u5982\u4f55\u5ef6\u8fdf\u6267\u884c Cancel \u4e8b\u4ef6\uff1f\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   \u4e3a\u4f55 SVG \u4f5c\u4e3a CSS \u80cc\u666f\u65f6\uff0cfill \u5c5e\u6027\u4e0d\u652f\u6301\u5341\u516d\u8fdb\u5236\u989c\u8272\uff1f\n <\/dd>\n<\/dl>\n
\n
\n <\/dt>\n
\n   \u5c0f\u7c73mix\u600e\u4e48\u8fde\u63a5\u8c4c\u8c46\u835a\u7535\u8111\u7248\uff1f\n <\/dd>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"
\u54c8\u55bd\uff01\u4eca\u5929\u5fc3\u8840\u6765\u6f6e\u7ed9\u5927\u5bb6\u5e26\u6765\u4e86 ...<\/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-206810","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/206810","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=206810"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/206810\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=206810"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=206810"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=206810"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}