{"id":208091,"date":"2025-07-08T12:50:34","date_gmt":"2025-07-08T04:50:34","guid":{"rendered":"https:\/\/server.hk\/cnblog\/208091\/"},"modified":"2025-07-08T12:50:34","modified_gmt":"2025-07-08T04:50:34","slug":"%e5%a4%9a%e4%b8%aa%e7%94%9f%e4%ba%a7%e8%80%85%ef%bc%8c%e5%8d%95%e4%b8%aa%e6%b6%88%e8%b4%b9%e8%80%85%ef%bc%9a%e6%89%80%e6%9c%89-goroutine-%e9%83%bd%e5%9c%a8%e7%9d%a1%e8%a7%89-%e6%ad%bb%e9%94%81","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/208091\/","title":{"rendered":"\u591a\u4e2a\u751f\u4ea7\u8005\uff0c\u5355\u4e2a\u6d88\u8d39\u8005\uff1a\u6240\u6709 goroutine \u90fd\u5728\u7761\u89c9 – \u6b7b\u9501"},"content":{"rendered":"

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

\u5f53\u524d\u4f4d\u7f6e\uff1a ><\/span> ><\/span> ><\/span> ><\/span> \u591a\u4e2a\u751f\u4ea7\u8005\uff0c\u5355\u4e2a\u6d88\u8d39\u8005\uff1a\u6240\u6709 goroutine \u90fd\u5728\u7761\u89c9 – \u6b7b\u9501<\/span><\/p>\n

\u6765\u6e90\uff1astackoverflow<\/span>
\n2024-04-28 21:51:35<\/span>
\n<\/i>0\u6d4f\u89c8<\/span>
\n<\/i>\u6536\u85cf<\/span> <\/p>\n

\u4eb2\u7231\u7684\u7f16\u7a0b\u5b66\u4e60\u7231\u597d\u8005\uff0c\u5982\u679c\u4f60\u70b9\u5f00\u4e86\u8fd9\u7bc7\u6587\u7ae0\uff0c\u8bf4\u660e\u4f60\u5bf9\u300a\u591a\u4e2a\u751f\u4ea7\u8005\uff0c\u5355\u4e2a\u6d88\u8d39\u8005\uff1a\u6240\u6709 goroutine \u90fd\u5728\u7761\u89c9 – \u6b7b\u9501\u300b\u5f88\u611f\u5174\u8da3\u3002\u672c\u7bc7\u6587\u7ae0\u5c31\u6765\u7ed9\u5927\u5bb6\u8be6\u7ec6\u89e3\u6790\u4e00\u4e0b\uff0c\u4e3b\u8981\u4ecb\u7ecd\u4e00\u4e0b\uff0c\u5e0c\u671b\u6240\u6709\u8ba4\u771f\u8bfb\u5b8c\u7684\u7ae5\u978b\u4eec\uff0c\u90fd\u6709\u5b9e\u8d28\u6027\u7684\u63d0\u9ad8\u3002<\/p>\n

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

\u5728\u7ee7\u7eed\u5de5\u4f5c\u4e4b\u524d\uff0c\u6211\u4e00\u76f4\u9075\u5faa\u68c0\u67e5\u9891\u9053\u4e2d\u662f\u5426\u6709\u4efb\u4f55\u5185\u5bb9\u7684\u6a21\u5f0f\uff1a<\/p>\n

func consume(msg <-chan message) {\n  for {\n    if m, ok := <-msg; ok {\n      fmt.println(\"more messages:\", m)\n    } else {\n      break\n    }\n  }\n}<\/pre>\n
\u8fd9\u662f\u57fa\u4e8e\u8fd9\u4e2a\u89c6\u9891\u7684\u3002\u8fd9\u662f\u6211\u7684\u5b8c\u6574\u4ee3\u7801\uff1a<\/p>\n
package main\n\nimport (\n    \"fmt\"\n    \"strconv\"\n    \"strings\"\n    \"sync\"\n)\n\ntype message struct {\n    body string\n    code int\n}\n\nvar markets []string = []string{\"BTC\", \"ETH\", \"LTC\"}\n\n\/\/ produces messages into the chan\nfunc produce(n int, market string, msg chan<- message, wg *sync.WaitGroup) {\n    \/\/ for i := 0; i < n; i++ {\n    var msgToSend = message{\n        body: strings.Join([]string{\"market: \", market, \", #\", strconv.Itoa(1)}, \"\"),\n        code: 1,\n    }\n    fmt.Println(\"Producing:\", msgToSend)\n    msg <- msgToSend\n    \/\/ }\n    wg.Done()\n}\n\nfunc receive(msg <-chan message, wg *sync.WaitGroup) {\n    for {\n        if m, ok := <-msg; ok {\n            fmt.Println(\"Received:\", m)\n        } else {\n            fmt.Println(\"Breaking from receiving\")\n            break\n        }\n    }\n    wg.Done()\n}\n\nfunc main() {\n    wg := sync.WaitGroup{}\n    msgC := make(chan message, 100)\n    defer func() {\n        close(msgC)\n    }()\n    for ix, market := range markets {\n        wg.Add(1)\n        go produce(ix+1, market, msgC, &wg)\n    }\n    wg.Add(1)\n    go receive(msgC, &wg)\n    wg.Wait()\n}<\/pre>\n
\u5982\u679c\u4f60\u5c1d\u8bd5\u8fd0\u884c\u5b83\uff0c\u6211\u4eec\u4f1a\u5728\u6253\u5370\u5373\u5c06\u6253\u7834\u7684\u6d88\u606f\u4e4b\u524d\u9677\u5165\u50f5\u5c40\u3002\u8bf4\u5b9e\u8bdd\uff0c\u8fd9\u662f\u6709\u9053\u7406\u7684\uff0c\u56e0\u4e3a\u4e0a\u6b21\uff0c\u5f53 chan \u4e2d\u6ca1\u6709\u5176\u4ed6\u5185\u5bb9\u65f6\uff0c\u6211\u4eec\u8bd5\u56fe\u63d0\u53d6\u8be5\u503c\uff0c\u6240\u4ee5\u6211\u4eec\u5f97\u5230\u4e86\u8fd9\u4e2a\u9519\u8bef\u3002\u4f46\u8fd9\u79cd\u6a21\u5f0f\u662f\u884c\u4e0d\u901a\u7684 if m, ok := <- msg; ok<\/code>\u3002\u5982\u4f55\u4f7f\u6b64\u4ee3\u7801\u5de5\u4f5c\u4ee5\u53ca\u4e3a\u4ec0\u4e48\u4f1a\u51fa\u73b0\u6b64\u6b7b\u9501\u9519\u8bef\uff08\u5927\u6982\u6b64\u6a21\u5f0f\u5e94\u8be5\u6709\u6548\uff1f\uff09\u3002<\/p>\n
 <\/p>\n
\u89e3\u51b3\u65b9\u6848<\/h2>\n
 <\/p>\n
\u9274\u4e8e\u60a8\u5728\u5355\u4e2a\u901a\u9053\u4e0a\u786e\u5b9e\u6709\u591a\u4e2a\u7f16\u5199\u5668\uff0c\u60a8\u4f1a\u9047\u5230\u4e00\u4e9b\u6311\u6218\uff0c\u56e0\u4e3a\u5728 go \u4e2d\u6267\u884c\u6b64\u64cd\u4f5c\u7684\u7b80\u5355\u65b9\u6cd5\u901a\u5e38\u662f\u5728\u5355\u4e2a\u901a\u9053\u4e0a\u6709\u4e00\u4e2a\u7f16\u5199\u5668\uff0c\u7136\u540e\u8ba9\u8be5\u5355\u4e2a\u7f16\u5199\u5668\u4f5c\u8005\u5728\u53d1\u9001\u6700\u540e\u4e00\u4e2a\u6570\u636e\u540e\u5173\u95ed\u901a\u9053\uff1a<\/p>\n
func produce(... args including channel) {\n    defer close(ch)\n    for stuff_to_produce {\n        ch <- item\n    }\n}<\/pre>\n
\u6b64\u6a21\u5f0f\u6709\u4e00\u4e2a\u5f88\u597d\u7684\u7279\u6027\uff0c\u65e0\u8bba\u60a8\u5982\u4f55\u9000\u51fa  produce<\/code>\uff0c\u901a\u9053\u90fd\u4f1a\u5173\u95ed\uff0c\u4ece\u800c\u53d1\u51fa\u751f\u4ea7\u7ed3\u675f\u7684\u4fe1\u53f7\u3002<\/p>\n
\u60a8\u6ca1\u6709\u4f7f\u7528\u8fd9\u79cd\u6a21\u5f0f – \u60a8\u5c06\u4e00\u4e2a\u901a\u9053\u4f20\u9012\u7ed9\u8bb8\u591a goroutine\uff0c\u6bcf\u4e2a goroutine \u90fd\u53ef\u4ee5\u53d1\u9001\u4e00\u6761<\/em>\u6d88\u606f – \u56e0\u6b64\u60a8\u9700\u8981\u79fb\u52a8 close<\/code> \uff08\u6216\u8005\uff0c\u5f53\u7136\uff0c\u4f7f\u7528\u4e00\u4e9b\u5176\u4ed6\u56fe\u6848\uff09\u3002\u8868\u8fbe\u60a8\u9700\u8981\u7684\u6a21\u5f0f\u7684\u6700\u7b80\u5355\u65b9\u6cd5\u662f\uff1a<\/p>\n
func overall_produce(... args including channel ...) {\n    var pg sync.waitgroup\n    defer close(ch)\n    for stuff_to_produce {\n        pg.add(1)\n        go produceinparallel(ch, &pg) \/\/ add more args if appropriate\n    }\n    pg.wait()\n}<\/pre>\n
pg<\/code> \u8ba1\u6570\u5668\u7d2f\u79ef\u6d3b\u8dc3\u751f\u4ea7\u8005\u3002\u6bcf\u4e2a\u90fd\u5fc5\u987b\u8c03\u7528 pg.done()<\/code> \u4ee5\u6307\u793a\u5b83\u662f\u4f7f\u7528 ch<\/code> \u5b8c\u6210\u7684\u3002\u6574\u4e2a\u751f\u4ea7\u8005\u73b0\u5728\u7b49\u5f85\u5b83\u4eec\u5168\u90e8\u5b8c\u6210\uff0c\u7136\u540e<\/em>\u5728\u9000\u51fa\u65f6\u5173\u95ed\u901a\u9053\u3002<\/p>\n
\uff08\u5982\u679c\u5c06\u5185\u90e8 productinparallel<\/code> \u51fd\u6570\u7f16\u5199\u4e3a\u95ed\u5305\uff0c\u5219\u65e0\u9700\u663e\u5f0f\u5411\u5176\u4f20\u9012 ch<\/code> \u548c pg<\/code>\u3002\u60a8\u4e5f\u53ef\u4ee5\u5c06 overallproducer<\/code> \u7f16\u5199\u4e3a\u95ed\u5305\u3002\uff09<\/p>\n
\u8bf7\u6ce8\u610f\uff0c\u60a8\u7684\u5355\u4e2a\u6d88\u8d39\u8005\u7684\u5faa\u73af\u53ef\u80fd\u6700\u597d\u4f7f\u7528 for ... range<\/code> \u6784\u9020\u6765\u8868\u8fbe\uff1a<\/p>\n
func receive(msg <-chan message, wg *sync.waitgroup) {\n    for m := range msg {\n        fmt.println(\"received:\", m)\n    }\n    wg.done()\n}<\/pre>\n
\uff08\u60a8\u63d0\u5230\u4e86\u5c06 select<\/code> \u6dfb\u52a0\u5230\u5faa\u73af\u4e2d\u7684\u610f\u56fe\uff0c\u4ee5\u4fbf\u5728\u6d88\u606f\u5c1a\u672a\u51c6\u5907\u597d\u65f6\u53ef\u4ee5\u6267\u884c\u5176\u4ed6\u8ba1\u7b97\u3002\u5982\u679c\u8be5\u4ee3\u7801\u65e0\u6cd5\u5206\u79bb\u5230\u72ec\u7acb\u7684 goroutine \u4e2d\uff0c\u90a3\u4e48\u5b9e\u9645\u4e0a\u60a8\u5c06\u9700\u8981\u66f4\u9ad8\u7ea7\u7684 m , ok := <-msg<\/code> \u6784\u9020\u3002\uff09<\/p>\n
\u53e6\u8bf7\u6ce8\u610f\uff0creceive<\/code> \u7684 wg<\/code>\uff08\u8fd9\u53ef\u80fd\u662f\u4e0d\u5fc5\u8981\u7684\uff0c\u5177\u4f53\u53d6\u51b3\u4e8e\u60a8\u5982\u4f55\u6784\u9020\u5176\u4ed6\u4e8b\u7269\uff09\u4e0e\u751f\u4ea7\u8005\u7684\u7b49\u5f85\u7ec4 pg<\/code> \u5b8c\u5168\u72ec\u7acb\u3002\u867d\u7136\u786e\u5b9e\u5982\u6240\u5199\u7684\uff0c\u5728\u6240\u6709\u751f\u4ea7\u8005\u5b8c\u6210\u4e4b\u524d\u6d88\u8d39\u8005\u65e0\u6cd5\u5b8c\u6210\uff0c\u4f46\u6211\u4eec\u5e0c\u671b\u72ec\u7acb\u7b49\u5f85\u751f\u4ea7\u8005\u5b8c\u6210\uff0c\u4ee5\u4fbf\u6211\u4eec\u53ef\u4ee5\u5173\u95ed\u6574\u4f53\u751f\u4ea7\u8005\u5305\u88c5\u5668\u4e2d\u7684\u901a\u9053\u3002 p><\/p>\n
\u5c1d\u8bd5\u8fd9\u4e2a\u4ee3\u7801\uff0c\u6211\u505a\u4e86\u4e00\u4e9b\u4fee\u590d\u4f7f\u5176\u5de5\u4f5c\uff1a<\/p>\n
package main\n\nimport (\n    \"fmt\"\n    \"strconv\"\n    \"strings\"\n    \"sync\"\n)\n\ntype message struct {\n    body string\n    code int\n}\n\nvar markets []string = []string{\"BTC\", \"ETH\", \"LTC\"}\n\n\/\/ produces messages into the chan\nfunc produce(n int, market string, msg chan<- message, wg *sync.WaitGroup) {\n    \/\/ for i := 0; i < n; i++ {\n    var msgToSend = message{\n        body: strings.Join([]string{\"market: \", market, \", #\", strconv.Itoa(1)}, \"\"),\n        code: 1,\n    }\n    fmt.Println(\"Producing:\", msgToSend)\n    msg <- msgToSend\n    \/\/ }\n\n}\n\nfunc receive(msg <-chan message, wg *sync.WaitGroup) {\n    for {\n        if m, ok := <-msg; ok {\n            fmt.Println(\"Received:\", m)\n            wg.Done()\n        }\n    }\n}\n\nfunc consume(msg <-chan message) {\n  for {\n    if m, ok := <-msg; ok {\n      fmt.Println(\"More messages:\", m)\n    } else {\n      break\n    }\n  }\n}\n\nfunc main() {\n    wg := sync.WaitGroup{}\n    msgC := make(chan message, 100)\n    defer func() {\n        close(msgC)\n    }()\n    for ix, market := range markets {\n        wg.Add(1)\n        go produce(ix+1, market, msgC, &wg)\n    }\n\n    go receive(msgC, &wg)\n    wg.Wait()\n    fmt.Println(\"Breaking from receiving\")\n}<\/pre>\n
\u4ee5\u4e0a\u5c31\u662f\u672c\u6587\u7684\u5168\u90e8\u5185\u5bb9\u4e86\uff0c\u662f\u5426\u6709\u987a\u5229\u5e2e\u52a9\u4f60\u89e3\u51b3\u95ee\u9898\uff1f\u82e5\u662f\u80fd\u7ed9\u4f60\u5e26\u6765\u5b66\u4e60\u4e0a\u7684\u5e2e\u52a9\uff0c\u8bf7\u5927\u5bb6\u591a\u591a\u652f\u6301\uff01\u66f4\u591a\u5173\u4e8eGolang\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u4e5f\u53ef\u5173\u6ce8\u516c\u4f17\u53f7\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-208091","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/208091","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=208091"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/208091\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=208091"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=208091"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=208091"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}