{"id":208254,"date":"2025-07-08T16:53:25","date_gmt":"2025-07-08T08:53:25","guid":{"rendered":"https:\/\/server.hk\/cnblog\/208254\/"},"modified":"2025-07-08T16:53:25","modified_gmt":"2025-07-08T08:53:25","slug":"effective-go-%e4%b8%ad%e7%9a%84%e5%ae%a2%e6%88%b7%e7%ab%af%e8%af%b7%e6%b1%82%e5%a4%84%e7%90%86%e7%a8%8b%e5%ba%8f%e7%a4%ba%e4%be%8b%e4%bc%9a%e5%af%bc%e8%87%b4%e6%ad%bb%e9%94%81%e5%90%97%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/208254\/","title":{"rendered":"effective Go \u4e2d\u7684\u5ba2\u6237\u7aef\u8bf7\u6c42\u5904\u7406\u7a0b\u5e8f\u793a\u4f8b\u4f1a\u5bfc\u81f4\u6b7b\u9501\u5417\uff1f"},"content":{"rendered":"

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

\u5f53\u524d\u4f4d\u7f6e\uff1a ><\/span> ><\/span> ><\/span> ><\/span> effective Go \u4e2d\u7684\u5ba2\u6237\u7aef\u8bf7\u6c42\u5904\u7406\u7a0b\u5e8f\u793a\u4f8b\u4f1a\u5bfc\u81f4\u6b7b\u9501\u5417\uff1f<\/span><\/p>\n

\u6765\u6e90\uff1astackoverflow<\/span>
\n2024-04-30 20:09:36<\/span>
\n<\/i>0\u6d4f\u89c8<\/span>
\n<\/i>\u6536\u85cf<\/span> <\/p>\n

\u672c\u7bc7\u6587\u7ae0\u7ed9\u5927\u5bb6\u5206\u4eab\u300aeffective Go \u4e2d\u7684\u5ba2\u6237\u7aef\u8bf7\u6c42\u5904\u7406\u7a0b\u5e8f\u793a\u4f8b\u4f1a\u5bfc\u81f4\u6b7b\u9501\u5417\uff1f\u300b\uff0c\u8986\u76d6\u4e86Golang\u7684\u5e38\u89c1\u57fa\u7840\u77e5\u8bc6\uff0c\u5176\u5b9e\u4e00\u4e2a\u8bed\u8a00\u7684\u5168\u90e8\u77e5\u8bc6\u70b9\u4e00\u7bc7\u6587\u7ae0\u662f\u4e0d\u53ef\u80fd\u8bf4\u5b8c\u7684\uff0c\u4f46\u5e0c\u671b\u901a\u8fc7\u8fd9\u4e9b\u95ee\u9898\uff0c\u8ba9\u8bfb\u8005\u5bf9\u81ea\u5df1\u7684\u638c\u63e1\u7a0b\u5ea6\u6709\u4e00\u5b9a\u7684\u8ba4\u8bc6(B \u6570)\uff0c\u4ece\u800c\u5f25\u8865\u81ea\u5df1\u7684\u4e0d\u8db3\uff0c\u66f4\u597d\u7684\u638c\u63e1\u5b83\u3002<\/p>\n

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

effective go \u6307\u5357\u6709\u4ee5\u4e0b\u5173\u4e8e\u5904\u7406\u5ba2\u6237\u7aef\u8bf7\u6c42\u7684\u793a\u4f8b\uff1a<\/p>\n

func handle(queue chan *request) {\n    for r := range queue {\n        process(r)\n    }\n}\n\nfunc serve(clientrequests chan *request, quit chan bool) {\n    \/\/ start handlers\n    for i := 0; i < maxoutstanding; i++ {\n        go handle(clientrequests)\n    }\n    <-quit  \/\/ wait to be told to exit.\n}\n<\/pre>\n
\u6211\u5728\u672c\u5730\u8fd0\u884c\u4e86\u7c7b\u4f3c\u7684\u4ee3\u7801\uff0c\u5176\u4e2d\u5ba2\u6237\u7aef\u8bf7\u6c42\u53ea\u662f\u6574\u6570\uff1a<\/p>\n
func handle(queue chan int) {\n    for r := range queue {\n        fmt.Println(\"r = \", r)\n    }\n}\n\nfunc serve(clientRequests chan int, quit chan bool) {\n    \/\/ Start handlers\n    for i := 0; i < 10; i++ {\n        go handle(clientRequests)\n    }\n    <-quit \/\/ Wait to be told to exit.\n}\n\nvar serveChannel = make(chan int)\nvar quit = make(chan bool)\nserve(serveChannel, quit)\nfor i := 0; i < 10; i++ {\n    serveChannel <- i\n}\n<\/pre>\n
\u4f46\u662f\u6211\u7684\u4ee3\u7801\u5bfc\u81f4\u6b7b\u9501\u9519\u8bef fatal \u9519\u8bef\uff1a\u6240\u6709 goroutine \u90fd\u5728\u7761\u89c9 - \u6b7b\u9501\uff01<\/code>\u3002<\/p>\n
\u5373\u4f7f\u6211\u4ece\u6982\u5ff5\u4e0a\u4e0d\u7406\u89e3\u7a0b\u5e8f\u4e2d\u7684\u95ee\u9898\uff0c\u6211\u4e5f\u4e0d\u7406\u89e3\u539f\u59cb\u4ee3\u7801\u662f\u5982\u4f55\u5de5\u4f5c\u7684\u3002\u6211\u786e\u5b9e\u4e86\u89e3 maxoutstanding<\/code> goroutine \u662f\u751f\u6210\u7684\uff0c\u5e76\u4e14\u5b83\u4eec\u90fd\u76d1\u542c\u5355\u4e2a clientrequests<\/code> \u901a\u9053\u3002\u4f46\u662f clientrequests<\/code> \u901a\u9053\u4ec5\u9002\u7528\u4e8e\u4e00\u4e2a\u8bf7\u6c42\uff0c\u56e0\u6b64\u4e00\u65e6\u8bf7\u6c42\u8fdb\u5165\uff0c\u6240\u6709 goroutine \u90fd\u53ef\u4ee5\u8bbf\u95ee\u540c\u4e00\u8bf7\u6c42\u3002\u4e3a\u4ec0\u4e48\u8fd9\u6709\u7528\uff1f<\/p>\n
 <\/p>\n
\u89e3\u51b3\u65b9\u6848<\/h2>\n
 <\/p>\n
\u8c03\u7528 serve<\/code> \u7684\u4ee3\u7801\u4e0d\u5e94\u8be5\u4e0e\u586b\u5145\u901a\u9053\u7684 goroutine \u8fd0\u884c\u5728\u540c\u4e00\u4e2a goroutine \u4e2d\u3002<\/p>\n
\u5728\u60a8\u7684\u4ee3\u7801\u4e2d\uff0cserve<\/code> \u542f\u52a8\u5904\u7406\u7a0b\u5e8f goroutine\uff0c\u4f46\u968f\u540e\u7b49\u5f85 <-quit<\/code>\u3002\u7531\u4e8e\u5b83\u88ab\u963b\u6b62\uff0c\u60a8\u6c38\u8fdc\u4e0d\u4f1a\u5230\u8fbe\u586b\u5145 servechannel<\/code> \u7684\u4ee3\u7801\u3002\u6240\u4ee5\u5de5\u4eba\u4eec\u4ece\u6765\u6ca1\u6709\u4efb\u4f55\u4e1c\u897f\u53ef\u4ee5\u6d88\u8d39\u3002\u60a8\u4e5f\u6c38\u8fdc\u4e0d\u4f1a\u901a\u77e5 quit<\/code>\uff0c\u8ba9 serve<\/code> \u6c38\u8fdc\u7b49\u5f85\u3002<\/p>\n
\u7b2c\u4e00\u6b65\u662f\u5728\u5355\u72ec\u7684 goroutine \u4e2d\u5c06\u6570\u636e\u53d1\u9001\u5230 servechannel<\/code>\u3002\u4f8b\u5982\uff1a<\/p>\n
func handle(queue chan int) {\n    for r := range queue {\n        fmt.println(\"r = \", r)\n    }\n}\n\nfunc serve(clientrequests chan int, quit chan bool) {\n    \/\/ start handlers\n    for i := 0; i < 10; i++ {\n        go handle(clientrequests)\n    }\n    <-quit \/\/ wait to be told to exit.\n}\n\nfunc populaterequests(servechannel chan int) {\n    for i := 0; i < 10; i++ {\n        servechannel <- i\n    }\n}\n\nfunc main() {\n    var servechannel = make(chan int)\n    var quit = make(chan bool)\n    go populaterequests(servechannel)\n    serve(servechannel, quit)\n}\n<\/pre>\n
\u6211\u4eec\u73b0\u5728\u5df2\u6839\u636e\u9700\u8981\u5904\u7406\u6240\u6709\u8bf7\u6c42\u3002<\/p>\n
\u4f46\u662f\uff0c\u4e00\u65e6\u5904\u7406\u5b8c\u6210\uff0c\u4f60\u4ecd\u7136\u4f1a\u9047\u5230 all goroutine are sleeped<\/code> \u3002\u8fd9\u662f\u56e0\u4e3a serve<\/code> \u6700\u7ec8\u7b49\u5f85 quit<\/code> \u4fe1\u53f7\uff0c\u4f46\u6ca1\u6709\u4efb\u4f55\u5185\u5bb9\u53ef\u53d1\u9001\u3002<\/p>\n
\u5728\u6b63\u5e38\u7a0b\u5e8f\u4e2d\uff0c\u5728\u6355\u83b7\u4fe1\u53f7\u6216\u67d0\u4e9b shutdown<\/code> \u8bf7\u6c42\u540e\uff0c\u5c06\u586b\u5145 quit<\/code>\u3002\u7531\u4e8e\u6211\u4eec\u6ca1\u6709\u4efb\u4f55\u4e1c\u897f\uff0c\u6211\u4eec\u5c06\u5728\u4e09\u79d2\u540e\u5c06\u5176\u5173\u95ed\uff0c\u4e5f\u662f\u5728\u4e00\u4e2a\u5355\u72ec\u7684 goroutine \u4e2d\u3002<\/p>\n
func handle(queue chan int) {\n    for r := range queue {\n        fmt.Println(\"r = \", r)\n    }\n}\n\nfunc serve(clientRequests chan int, quit chan bool) {\n    \/\/ Start handlers\n    for i := 0; i < 10; i++ {\n        go handle(clientRequests)\n    }\n    <-quit \/\/ Wait to be told to exit.\n}\n\nfunc populateRequests(serveChannel chan int) {\n    for i := 0; i < 10; i++ {\n        serveChannel <- i\n    }\n}\n\nfunc quitAfter(quit chan bool, duration time.Duration) {\n    time.Sleep(duration)\n    quit <- true\n}\n\nfunc main() {\n    var serveChannel = make(chan int)\n    var quit = make(chan bool)\n    go populateRequests(serveChannel)\n    go quitAfter(quit, 3*time.Second)\n    serve(serveChannel, quit)\n}\n<\/pre>\n
\u81f3\u4e8e\u4f60\u7684\u6700\u540e\u4e00\u4e2a\u95ee\u9898\uff1a\u591a\u4e2a\u5904\u7406\u7a0b\u5e8f\u4e0d\u4f1a\u770b\u5230\u76f8\u540c\u7684\u8bf7\u6c42\u3002\u5f53\u4e00\u4e2a\u5904\u7406\u7a0b\u5e8f\u4ece\u901a\u9053\u63a5\u6536\u5230\u4e00\u4e2a\u503c\u65f6\uff0c\u8be5\u503c\u5c31\u4f1a\u4ece\u901a\u9053\u4e2d\u5220\u9664\u3002\u4e0b\u4e00\u4e2a\u5904\u7406\u7a0b\u5e8f\u5c06\u63a5\u6536\u4e0b\u4e00\u4e2a\u503c\u3002\u5c06\u901a\u9053\u89c6\u4e3a\u53ef\u5b89\u5168\u5e76\u53d1\u4f7f\u7528\u7684\u5148\u8fdb\u5148\u51fa\u961f\u5217\u3002<\/p>\n
\u60a8\u53ef\u4ee5\u5728 \u4e0a\u627e\u5230\u4ee3\u7801\u7684\u6700\u540e\u4e00\u6b21\u8fed\u4ee3\u3002<\/p>\n
\u672c\u7bc7\u5173\u4e8e\u300aeffective Go \u4e2d\u7684\u5ba2\u6237\u7aef\u8bf7\u6c42\u5904\u7406\u7a0b\u5e8f\u793a\u4f8b\u4f1a\u5bfc\u81f4\u6b7b\u9501\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-208254","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/208254","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=208254"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/208254\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=208254"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=208254"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=208254"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}