{"id":207259,"date":"2025-07-08T09:20:14","date_gmt":"2025-07-08T01:20:14","guid":{"rendered":"https:\/\/server.hk\/cnblog\/207259\/"},"modified":"2025-07-08T09:20:14","modified_gmt":"2025-07-08T01:20:14","slug":"%e8%bf%99%e9%87%8c%e5%8f%af%e8%83%bd%e4%bc%9a%e5%87%ba%e7%8e%b0%e6%81%90%e6%85%8c%e5%90%97%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/207259\/","title":{"rendered":"\u8fd9\u91cc\u53ef\u80fd\u4f1a\u51fa\u73b0\u6050\u614c\u5417\uff1f"},"content":{"rendered":"

<\/b> <\/p>\n

\u5f53\u524d\u4f4d\u7f6e\uff1a ><\/span> ><\/span> ><\/span> ><\/span> \u8fd9\u91cc\u53ef\u80fd\u4f1a\u51fa\u73b0\u6050\u614c\u5417\uff1f<\/span><\/p>\n

\u6765\u6e90\uff1astackoverflow<\/span>
\n2024-04-21 10:21:26<\/span>
\n<\/i>0\u6d4f\u89c8<\/span>
\n<\/i>\u6536\u85cf<\/span> <\/p>\n

\u54c8\u55bd\uff01\u5927\u5bb6\u597d\uff0c\u5f88\u9ad8\u5174\u53c8\u89c1\u9762\u4e86\uff0c\u6211\u662f\u7684\u4e00\u540d\u4f5c\u8005\uff0c\u4eca\u5929\u7531\u6211\u7ed9\u5927\u5bb6\u5e26\u6765\u4e00\u7bc7\u300a\u8fd9\u91cc\u53ef\u80fd\u4f1a\u51fa\u73b0\u6050\u614c\u5417\uff1f\u300b<\/span>\uff0c\u672c\u6587\u4e3b\u8981\u4f1a\u8bb2\u5230<\/span>\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u5e0c\u671b\u5927\u5bb6\u4e00\u8d77\u5b66\u4e60\u8fdb\u6b65\uff0c\u4e5f\u6b22\u8fce\u5927\u5bb6\u5173\u6ce8\u3001\u70b9\u8d5e\u3001\u6536\u85cf\u3001\u8f6c\u53d1! \u4e0b\u9762\u5c31\u4e00\u8d77\u6765\u770b\u770b\u5427\uff01<\/p>\n

\u95ee\u9898\u5185\u5bb9
\n <\/p>\n

func main() {\n    rand.Seed(time.Now().Unix())\n    ctx, cancelFunc := context.WithCancel(context.Background())\n    anies := make(chan any)\n    go doSomething(ctx, anies)\n    intn := rand.Intn(2)\n    if intn == 0 { \/\/BRANCH1\n        cancelFunc()\n        close(anies) \n    }\n    time.Sleep(time.Second)\n}\n\nfunc doSomething(ctx context.Context, anies chan any) {\n    for {\n         if ctx.Err() == nil { \/\/LINE2\n            anies <- 1 \/\/LINE3\n        }\n    }\n}<\/pre>\n
\u6709\u6ca1\u6709\u53ef\u80fd\uff0c\u5f53 branch1 \u53d1\u751f\u5728 line2 \u548c line3 \u4e4b\u95f4\u65f6\uff0c\u6211\u4f1a\u611f\u5230\u6050\u614c\u3002<\/p>\n
 <\/p>\n
\u6b63\u786e\u7b54\u6848<\/h2>\n
 <\/p>\n
\u662f\u7684\uff0c\u6050\u614c\u662f\u53ef\u80fd\u7684\u3002\u4ee5\u4e0b\u662f\u53d1\u751f\u6050\u614c\u7684\u65f6\u95f4\u7ebf\u793a\u4f8b\u3002\u8fd9\u4e9b\u884c\u6309\u65f6\u95f4\u9012\u589e\u987a\u5e8f\u6392\u5217\u3002 N: \u524d\u7f00\u4ee3\u8868 goroutine\u3002<\/p>\n
1\uff1a\u542f\u52a8\u534f\u7a0b2
 2\uff1a\u8c03\u7528ctx.Err()\uff0c\u5b83\u8fd4\u56denil
 1\uff1a\u8c03\u7528cancelFunc()
 1\uff1a\u5173\u95ed\u901a\u9053anis
 2\uff1a\u53d1\u9001\u5230aniy\u9891\u9053\u3002\u6050\u614c\uff0c\u56e0\u4e3a\u901a\u9053\u5df2\u5173\u95ed\u3002<\/p>\n
\u672c\u7bc7\u5173\u4e8e\u300a\u8fd9\u91cc\u53ef\u80fd\u4f1a\u51fa\u73b0\u6050\u614c\u5417\uff1f\u300b\u7684\u4ecb\u7ecd\u5c31\u5230\u6b64\u7ed3\u675f\u5566\uff0c\u4f46\u662f\u5b66\u65e0\u6b62\u5883\uff0c\u60f3\u8981\u4e86\u89e3\u5b66\u4e60\u66f4\u591a\u5173\u4e8eGolang\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u8bf7\u5173\u6ce8\u516c\u4f17\u53f7\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5f53\u524d\u4f4d\u7f6e\uff1a > > ...<\/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-207259","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207259","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=207259"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207259\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=207259"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=207259"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=207259"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}