{"id":208224,"date":"2025-07-08T12:25:04","date_gmt":"2025-07-08T04:25:04","guid":{"rendered":"https:\/\/server.hk\/cnblog\/208224\/"},"modified":"2025-07-08T12:25:04","modified_gmt":"2025-07-08T04:25:04","slug":"go-%e4%b8%ad%e7%9a%84%e7%88%b6%e5%ad%90%e4%b8%8a%e4%b8%8b%e6%96%87%e5%8f%96%e6%b6%88%e9%a1%ba%e5%ba%8f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/208224\/","title":{"rendered":"Go \u4e2d\u7684\u7236\u5b50\u4e0a\u4e0b\u6587\u53d6\u6d88\u987a\u5e8f"},"content":{"rendered":"

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

\u5f53\u524d\u4f4d\u7f6e\uff1a ><\/span> ><\/span> ><\/span> ><\/span> Go \u4e2d\u7684\u7236\u5b50\u4e0a\u4e0b\u6587\u53d6\u6d88\u987a\u5e8f<\/span><\/p>\n

\u6765\u6e90\uff1astackoverflow<\/span>
\n2024-04-30 14:42:36<\/span>
\n<\/i>0\u6d4f\u89c8<\/span>
\n<\/i>\u6536\u85cf<\/span> <\/p>\n

\u77e5\u8bc6\u70b9\u638c\u63e1\u4e86\uff0c\u8fd8\u9700\u8981\u4e0d\u65ad\u7ec3\u4e60\u624d\u80fd\u719f\u7ec3\u8fd0\u7528\u3002\u4e0b\u9762\u7ed9\u5927\u5bb6\u5e26\u6765\u4e00\u4e2aGolang\u5f00\u53d1\u5b9e\u6218\uff0c\u624b\u628a\u624b\u6559\u5927\u5bb6\u5b66\u4e60\u300aGo \u4e2d\u7684\u7236\u5b50\u4e0a\u4e0b\u6587\u53d6\u6d88\u987a\u5e8f\u300b\uff0c\u5728\u5b9e\u73b0\u529f\u80fd\u7684\u8fc7\u7a0b\u4e2d\u4e5f\u5e26\u5927\u5bb6\u91cd\u65b0\u6e29\u4e60\u76f8\u5173\u77e5\u8bc6\u70b9\uff0c\u6e29\u6545\u800c\u77e5\u65b0\uff0c\u56de\u5934\u770b\u770b\u8bf4\u4e0d\u5b9a\u53c8\u6709\u4e0d\u4e00\u6837\u7684\u611f\u609f\uff01<\/p>\n

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

\u6211\u60f3\u77e5\u9053golang\u4e2d\u4e0a\u4e0b\u6587\u53d6\u6d88\u65f6\u7684\u8fd4\u56de\u987a\u5e8f\u662f\u5426\u6709\u4efb\u4f55\u4fdd\u8bc1\u3002<\/p>\n

\u6211\u60f3\u521b\u5efa\u4e00\u4e2a\u5177\u6709\u53d6\u6d88\u529f\u80fd\u7684\u4e0a\u4e0b\u6587\uff0c\u4e00\u65e6\u6240\u6709\u4fa6\u542c\u5668\u90fd\u5b8c\u6210\u4e86\u5904\u7406\u6355\u83b7\u5e76\u5bf9\u6b64\u4e0a\u4e0b\u6587\u4e2d\u7684\u201c<-ctx.done()\u201d\u505a\u51fa\u53cd\u5e94\uff0c\u6211\u60f3\u5b89\u5168\u5730\u8c03\u7528 os.exit\u3002<\/p>\n

\u4e0b\u9762\u662f\u4e00\u4e2a\u5177\u4f53\u7684\u4f8b\u5b50\u6765\u89e3\u91ca\u6211\u60f3\u8981\u7684\u60f3\u6cd5\u3002\u6211\u60f3\u6355\u83b7\u4e00\u4e2a\u4fe1\u53f7\uff0c\u89e6\u53d1\u6240\u6709\u53d6\u6d88\uff0c\u7136\u540e\u8c03\u7528 os.exit()\u3002<\/p>\n

\u6211\u521b\u5efa\u4e00\u4e2a\u4e0a\u4e0b\u6587\u5e76\u76d1\u542c\u4fe1\u53f7\uff1a<\/p>\n

ctx, cancel := context.withcancel(context.background())\ngo func() {\n    c := make(chan os.signal)\n    signal.notify(c, os.interrupt)\n    defer signal.stop(c)\n\n    select {\n    case <-c:\n        cancel()\n    }\n}()<\/pre>\n
\u5728\u5176\u4ed6\u5730\u65b9\uff0c\u6211\u591a\u6b21\u201c\u6ce8\u518c\u201d\u6b64\u8bf7\u6c42\uff1a<\/p>\n
res := newres()\ngo func() {\n    <-ctx.done():\n    res.close()\n}()<\/pre>\n
\u4f46\u662f\u6211\u60f3\u5728\u6240\u6709\u4fa6\u542c\u5668\u5b8c\u6210\u65f6\u8c03\u7528 os.exit\u3002<\/p>\n
\u4e3a\u6b64\uff0c\u6211\u8ba1\u5212\u521b\u5efa\u7236\u4e0a\u4e0b\u6587\u6216\u5b50\u4e0a\u4e0b\u6587\uff0c\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n
parent, pCancel := context.WithCancel(context.Background())\nchild, _ := context.WithCancel(parent)\ngo func() {\n    c := make(chan os.Signal)\n    signal.Notify(c, os.Interrupt)\n    defer signal.Stop(c)\n\n    select {\n    case <-c:\n        pCancel()\n    case <-child.Done():\n        os.Exit(0)\n    }\n}()<\/pre>\n
\u4e0d\u5e78\u7684\u662f\uff0c\u6211\u6ca1\u6709\u627e\u5230\u63cf\u8ff0\u4e0a\u4e0b\u6587\u53d6\u6d88\u987a\u5e8f\u7684\u6587\u6863\uff0c\u6240\u4ee5\u6211\u6682\u65f6\u65e0\u6cd5\u63d0\u51fa\u6b63\u786e\u7684\u89e3\u51b3\u65b9\u6848\u3002<\/p>\n
 <\/p>\n
\u89e3\u51b3\u65b9\u6848<\/h2>\n
 <\/p>\n
\u9000\u51fa\u4e4b\u524d\u60a8\u5fc5\u987b\u7b49\u5f85\u6240\u6709\u4f8b\u7a0b\u3002\u8c03\u7528 pcancel()<\/code> \u5e76\u4e0d\u610f\u5473\u7740\u4e00\u5207\u90fd\u4f1a\u505c\u6b62\u3002\u6211\u5efa\u8bae\u5728\u4f8b\u7a0b\u4e2d\u5b8c\u6210\u6240\u6709\u4f5c\u4e1a\uff0c\u4f46\u5728\u4e3b\u7ebf\u7a0b\u4e0a\u7b49\u5f85 os.interrupt \u4fe1\u53f7\u3002 <\/p>\n
\u68c0\u67e5\u4e0b\u9762\u7684\u793a\u4f8b<\/p>\n
package main\n\nimport (\n    \"context\"\n    \"fmt\"\n    \"os\"\n    \"os\/signal\"\n    \"sync\"\n    \"time\"\n)\n\nfunc main() {\n    parent, pcancel := context.withcancel(context.background())\n    child, _ := context.withcancel(parent)\n    wg := &sync.waitgroup{}\n\n    for i := 0; i < 10; i++ {\n        go work(wg, child)\n    }\n\n    c := make(chan os.signal)\n    signal.notify(c, os.interrupt)\n    defer signal.stop(c)\n\n    select {\n    case <-c:\n        pcancel()\n        fmt.println(\"waiting everyone to finish...\")\n        wg.wait()\n        fmt.println(\"exiting\")\n        os.exit(0)\n    }\n}\n\nfunc work(wg *sync.waitgroup, ctx context.context) {\n    done := false\n    wg.add(1)\n    for !done {\n        fmt.println(\"doing something...\")\n        time.sleep(time.second)\n        select {\n        case <-ctx.done():\n            fmt.println(\"done\")\n            done = true\n        default:\n\n        }\n    }\n    wg.done()\n}<\/pre>\n
\u5c3d\u7ba1\u5982\u6b64\uff0c\u8fd8\u662f\u5efa\u8bae\u4f7f\u7528\u201c\u901a\u8fc7\u901a\u4fe1\u5171\u4eab\u5185\u5b58\u201d<\/strong>\u539f\u5219\u3002 \u8fd9\u662f\u4e0d\u4f7f\u7528 waitgroup \u7684\u53e6\u4e00\u4e2a\u793a\u4f8b\u3002<\/p>\n
package main\n\nimport (\n    \"context\"\n    \"fmt\"\n    \"os\"\n    \"os\/signal\"\n    \"time\"\n)\n\nfunc main() {\n    parent, pCancel := context.WithCancel(context.Background())\n    child, _ := context.WithCancel(parent)\n    done := make(chan struct{})\n    jobsCount := 10\n\n    for i := 0; i < jobsCount; i++ {\n        go work(child, done)\n    }\n\n    c := make(chan os.Signal)\n    signal.Notify(c, os.Interrupt)\n    defer signal.Stop(c)\n\n    select {\n    case <-c:\n        pCancel()\n        fmt.Println(\"Waiting everyone to finish...\")\n        for i := 0; i < jobsCount; i++ {\n            <-done\n        }\n        fmt.Println(\"Exiting\")\n        os.Exit(0)\n    }\n}\n\nfunc work(ctx context.Context, doneChan chan struct{}) {\n    done := false\n    for !done {\n        fmt.Println(\"Doing something...\")\n        time.Sleep(time.Second)\n        select {\n        case <-ctx.Done():\n            fmt.Println(\"Done\")\n            done = true\n        default:\n\n        }\n    }\n    doneChan <- struct{}{}\n}<\/pre>\n
\u4eca\u5929\u5173\u4e8e\u300aGo \u4e2d\u7684\u7236\u5b50\u4e0a\u4e0b\u6587\u53d6\u6d88\u987a\u5e8f\u300b\u7684\u5185\u5bb9\u5c31\u4ecb\u7ecd\u5230\u8fd9\u91cc\u4e86\uff0c\u662f\u4e0d\u662f\u5b66\u8d77\u6765\u4e00\u76ee\u4e86\u7136\uff01\u60f3\u8981\u4e86\u89e3\u66f4\u591a\u5173\u4e8e\u7684\u5185\u5bb9\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-208224","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/208224","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=208224"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/208224\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=208224"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=208224"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=208224"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}