{"id":208063,"date":"2025-07-08T14:28:27","date_gmt":"2025-07-08T06:28:27","guid":{"rendered":"https:\/\/server.hk\/cnblog\/208063\/"},"modified":"2025-07-08T14:28:27","modified_gmt":"2025-07-08T06:28:27","slug":"%e5%a6%82%e4%bd%95%e8%ae%a9%e5%a4%9a%e4%b8%aa-go-%e4%be%8b%e7%a8%8b%e7%ad%89%e5%be%85%e5%8f%a6%e4%b8%80%e4%b8%aa-goroutine-%e7%9a%84%e8%be%93%e5%87%ba","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/208063\/","title":{"rendered":"\u5982\u4f55\u8ba9\u591a\u4e2a go \u4f8b\u7a0b\u7b49\u5f85\u53e6\u4e00\u4e2a goroutine \u7684\u8f93\u51fa"},"content":{"rendered":"

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

\u5f53\u524d\u4f4d\u7f6e\uff1a ><\/span> ><\/span> ><\/span> ><\/span> \u5982\u4f55\u8ba9\u591a\u4e2a go \u4f8b\u7a0b\u7b49\u5f85\u53e6\u4e00\u4e2a goroutine \u7684\u8f93\u51fa<\/span><\/p>\n

\u6765\u6e90\uff1astackoverflow<\/span>
\n2024-04-28 14:06:36<\/span>
\n<\/i>0\u6d4f\u89c8<\/span>
\n<\/i>\u6536\u85cf<\/span> <\/p>\n

Golang<\/span>\u4e0d\u77e5\u9053\u5927\u5bb6\u662f\u5426\u719f\u6089\uff1f\u4eca\u5929\u6211\u5c06\u7ed9\u5927\u5bb6\u4ecb\u7ecd\u300a\u5982\u4f55\u8ba9\u591a\u4e2a go \u4f8b\u7a0b\u7b49\u5f85\u53e6\u4e00\u4e2a goroutine \u7684\u8f93\u51fa\u300b<\/span>\uff0c\u8fd9\u7bc7\u6587\u7ae0\u4e3b\u8981\u4f1a\u8bb2\u5230<\/span>\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u5982\u679c\u4f60\u5728\u770b\u5b8c\u672c\u7bc7\u6587\u7ae0\u540e\uff0c\u6709\u66f4\u597d\u7684\u5efa\u8bae\u6216\u8005\u53d1\u73b0\u54ea\u91cc\u6709\u95ee\u9898\uff0c\u5e0c\u671b\u5927\u5bb6\u90fd\u80fd\u79ef\u6781\u8bc4\u8bba\u6307\u51fa\uff0c\u8c22\u8c22\uff01\u5e0c\u671b\u6211\u4eec\u80fd\u4e00\u8d77\u52a0\u6cb9\u8fdb\u6b65\uff01<\/p>\n

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

main {\ngo routine_1(carryout a time consuming task and return output)\ngo routine_2(wait for output from routine_1, collect output and do task_2)\ngo routine_3(wait for output from routine_1, collect output and do task_3)\nwait for all routines to complete\n}<\/pre>\n
\u6211\u4f7f\u7528\u4e86\u901a\u9053\uff0c\u4f46\u662f\u4e00\u65e6routine_2\u8bfb\u53d6\u6570\u636e\uff0croutine_3\u5c31\u65e0\u6cd5\u83b7\u53d6\u6570\u636e\u3002<\/p>\n
\u6211\u4e0d\u60f3\u8ba9\u4e3b\u7ebf\u7a0b\u8fdb\u884c\u540c\u6b65\uff0c\u5373\u77e5\u9053routine_2\u3001routine_3\u5230routine_1\u4e4b\u95f4\u7684\u4f9d\u8d56\u5173\u7cfb<\/p>\n
\u4e8b\u5b9e\u8bc1\u660e\uff0c\u5173\u95ed\u901a\u9053\u5c06\u4e3a\u5176\u4ed6\u4f8b\u7a0b\u63d0\u4f9b\u6240\u9700\u7684\u5e7f\u64ad\uff0c\u4ee5\u4e86\u89e3\u7ed3\u679c\u5df2\u51c6\u5907\u597d\u3002<\/p>\n
\u611f\u8c22\u60a8\u62bd\u51fa\u65f6\u95f4\u3002\uff08\u8fd9\u662f\u6211\u5728 stackoverflow \u4e2d\u7684\u7b2c\u4e00\u4e2a\u95ee\u9898\uff0c\u5f88\u9ad8\u5174\u770b\u5230\u5982\u6b64\u597d\u7684\u8d28\u91cf\u548c\u5feb\u901f\u7684\u56de\u200b\u200b\u590d\uff09\u8c22\u8c22\u5927\u5bb6\u3002<\/p>\n
\u66f4\u65b0\u6211\u9009\u62e9\u7684\u7b54\u6848\u3002\u518d\u6b21\u611f\u8c22\u3002<\/p>\n
package main\n\nimport (\n    \"fmt\"\n    \"sync\"\n)\n\nfunc computeResult() int {\n    return 100\n}\n\nfunc main() {\n\n    var wg sync.WaitGroup\n    wg.Add(2)\n    var output int\n\n    ch := make(chan struct{})\n\n    \/\/ Compute result\n    go func() {\n        defer wg.Done()\n        output = computeResult()\n        fmt.Println(\"closing channel to signal task done\")\n        close(ch)\n        fmt.Println(\"channel closed\")\n\n    }()\n\n    go func() {\n        defer wg.Done()\n        \/\/ Wait for ch close\n        <-ch\n        fmt.Println(output)\n    }()\n\n    wg.Wait()\n\n    var wg2 sync.WaitGroup\n    wg2.Add(1)\n\n    go func() {\n        defer wg2.Done()\n        fmt.Println(\"wait on closed channel\")\n        \/\/ Wait for ch close\n        <-ch\n        fmt.Println(output)\n    }()\n\n    wg2.Wait()\n\n}<\/pre>\n
 <\/p>\n
\u89e3\u51b3\u65b9\u6848<\/h2>\n
 <\/p>\n
\u60a8\u53ef\u4ee5\u4f7f\u7528\u901a\u9053\u7684\u5173\u95ed\u6765\u5e7f\u64ad\u7ed3\u679c\u51c6\u5907\u60c5\u51b5\uff0c\u5e76\u4f7f\u7528\u5171\u4eab\u53d8\u91cf\u6765\u5b58\u50a8\u7ed3\u679c\uff1a<\/p>\n
func() {\n   var output sometype\n   ch:=make(chan struct{})\n\n   \/\/ compute result\n   go func() {\n      output=computeresult()\n      close(ch)\n   }()\n\n   go func() {\n     \/\/ wait for ch close\n     <-ch\n      useoutput()\n    }()\n}<\/pre>\n
\u60a8\u53ef\u4ee5\u6709\u8bb8\u591a goroutine \u7b49\u5f85\u901a\u9053\u5173\u95ed\u3002\u5f53\u901a\u9053\u5173\u95ed\u65f6\uff0c\u6240\u6709 goroutine \u5c06\u88ab\u542f\u7528\u3002<\/p>\n
\u60a8\u53ef\u4ee5\u5728\u7b2c\u4e00\u4e2a\u4f8b\u7a0b\u5b8c\u6210\u540e\u8c03\u7528\u5176\u4ed6\u4e24\u4e2a\u4f8b\u7a0b\uff1a<\/p>\n
var wg sync.WaitGroup\nwg.Add(2)\ngo func() {\n    output := task1()\n    go func() {\n        defer wg.done()\n        task2(output)\n    }\n    go func() {\n        defer wg.done()\n        task3(output)\n    }\n}()\nwg.Wait()<\/pre>\n
\u6587\u4e2d\u5173\u4e8e\u7684\u77e5\u8bc6\u4ecb\u7ecd\uff0c\u5e0c\u671b\u5bf9\u4f60\u7684\u5b66\u4e60\u6709\u6240\u5e2e\u52a9\uff01\u82e5\u662f\u53d7\u76ca\u532a\u6d45\uff0c\u90a3\u5c31\u52a8\u52a8\u9f20\u6807\u6536\u85cf\u8fd9\u7bc7\u300a\u5982\u4f55\u8ba9\u591a\u4e2a go \u4f8b\u7a0b\u7b49\u5f85\u53e6\u4e00\u4e2a goroutine \u7684\u8f93\u51fa\u300b\u6587\u7ae0\u5427\uff0c\u4e5f\u53ef\u5173\u6ce8\u516c\u4f17\u53f7\u4e86\u89e3\u76f8\u5173\u6280\u672f\u6587\u7ae0\u3002<\/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-208063","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/208063","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=208063"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/208063\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=208063"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=208063"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=208063"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}