{"id":57700,"date":"2024-10-10T20:28:16","date_gmt":"2024-10-10T12:28:16","guid":{"rendered":"https:\/\/server.hk\/cnblog\/57700\/"},"modified":"2024-10-10T20:28:17","modified_gmt":"2024-10-10T12:28:17","slug":"go%e6%95%99%e7%a8%8b-go-%e8%aa%9e%e8%a8%80%e6%ad%bb%e9%8e%96%e3%80%81%e6%b4%bb%e9%8e%96%e5%92%8c%e9%a5%91%e9%a4%93%e6%a6%82%e8%bf%b0","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/57700\/","title":{"rendered":"GO\u6559\u7a0b: Go \u8a9e\u8a00\u6b7b\u9396\u3001\u6d3b\u9396\u548c\u9951\u9913\u6982\u8ff0"},"content":{"rendered":"

GO\u6559\u7a0b: Go \u8a9e\u8a00\u6b7b\u9396\u3001\u6d3b\u9396\u548c\u9951\u9913\u6982\u8ff0<\/h1>\n

\u5728\u591a\u7dda\u7a0b\u7de8\u7a0b\u4e2d\uff0c\u6b7b\u9396\u3001\u6d3b\u9396\u548c\u9951\u9913\u662f\u4e09\u500b\u5e38\u898b\u7684\u554f\u984c\uff0c\u9019\u4e9b\u554f\u984c\u53ef\u80fd\u6703\u5c0e\u81f4\u61c9\u7528\u7a0b\u5e8f\u7684\u6027\u80fd\u4e0b\u964d\u6216\u5b8c\u5168\u7121\u6cd5\u904b\u884c\u3002Go \u8a9e\u8a00\u4f5c\u70ba\u4e00\u7a2e\u652f\u6301\u4e26\u767c\u7de8\u7a0b\u7684\u8a9e\u8a00\uff0c\u63d0\u4f9b\u4e86\u5f37\u5927\u7684\u5de5\u5177\u4f86\u8655\u7406\u9019\u4e9b\u554f\u984c\u3002\u672c\u6587\u5c07\u5c0d\u9019\u4e09\u500b\u6982\u5ff5\u9032\u884c\u8a73\u7d30\u7684\u4ecb\u7d39\uff0c\u4e26\u63d0\u4f9b\u76f8\u61c9\u7684\u793a\u4f8b\u4ee3\u78bc\u4f86\u5e6b\u52a9\u7406\u89e3\u3002<\/p>\n

\u6b7b\u9396\uff08Deadlock\uff09<\/h2>\n

\u6b7b\u9396\u662f\u6307\u5169\u500b\u6216\u591a\u500b\u9032\u7a0b\u5728\u57f7\u884c\u904e\u7a0b\u4e2d\uff0c\u56e0\u70ba\u7af6\u722d\u8cc7\u6e90\u800c\u9020\u6210\u7684\u4e00\u7a2e\u4e92\u76f8\u7b49\u5f85\u7684\u60c5\u6cc1\uff0c\u5c0e\u81f4\u6240\u6709\u9032\u7a0b\u90fd\u7121\u6cd5\u7e7c\u7e8c\u57f7\u884c\u3002\u5728 Go \u8a9e\u8a00\u4e2d\uff0c\u9019\u901a\u5e38\u767c\u751f\u5728 goroutine \u4e4b\u9593\u7684\u901a\u8a0a\u4e2d\u3002<\/p>\n

\u6b7b\u9396\u793a\u4f8b<\/h3>\n
package main\n\nimport (\n    \"fmt\"\n    \"sync\"\n)\n\nfunc main() {\n    var mu1, mu2 sync.Mutex\n\n    go func() {\n        mu1.Lock()\n        fmt.Println(\"Goroutine 1: Locked mu1\")\n        mu2.Lock()\n        fmt.Println(\"Goroutine 1: Locked mu2\")\n        mu2.Unlock()\n        mu1.Unlock()\n    }()\n\n    go func() {\n        mu2.Lock()\n        fmt.Println(\"Goroutine 2: Locked mu2\")\n        mu1.Lock()\n        fmt.Println(\"Goroutine 2: Locked mu1\")\n        mu1.Unlock()\n        mu2.Unlock()\n    }()\n\n    \/\/ \u7b49\u5f85 goroutines \u5b8c\u6210\n    var wg sync.WaitGroup\n    wg.Add(2)\n    wg.Wait()\n}\n<\/code><\/pre>\n
\u5728\u4e0a\u8ff0\u4ee3\u78bc\u4e2d\uff0c\u5169\u500b goroutine \u4e92\u76f8\u7b49\u5f85\u5c0d\u65b9\u91cb\u653e\u9396\uff0c\u5c0e\u81f4\u6b7b\u9396\u7684\u767c\u751f\u3002<\/p>\n
\u6d3b\u9396\uff08Livelock\uff09<\/h2>\n
\u6d3b\u9396\u662f\u4e00\u7a2e\u60c5\u6cc1\uff0c\u96d6\u7136\u9032\u7a0b\u4ecd\u5728\u904b\u884c\uff0c\u4f46\u7531\u65bc\u4e0d\u65b7\u5730\u6539\u8b8a\u72c0\u614b\u800c\u7121\u6cd5\u5b8c\u6210\u4efb\u52d9\u3002\u9019\u901a\u5e38\u767c\u751f\u5728\u9032\u7a0b\u4e4b\u9593\u7684\u76f8\u4e92\u97ff\u61c9\u4e2d\u3002<\/p>\n
\u6d3b\u9396\u793a\u4f8b<\/h3>\n
package main\n\nimport (\n    \"fmt\"\n    \"time\"\n)\n\nfunc main() {\n    var a, b int\n    a, b = 0, 0\n\n    go func() {\n        for {\n            if a == 0 && b == 0 {\n                a = 1\n                fmt.Println(\"Goroutine 1: a = 1\")\n            }\n            time.Sleep(100 * time.Millisecond)\n        }\n    }()\n\n    go func() {\n        for {\n            if a == 1 && b == 0 {\n                b = 1\n                fmt.Println(\"Goroutine 2: b = 1\")\n            }\n            time.Sleep(100 * time.Millisecond)\n        }\n    }()\n\n    \/\/ \u7b49\u5f85 goroutines \u5b8c\u6210\n    select {}\n}\n<\/code><\/pre>\n
\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u5169\u500b goroutine \u4e0d\u65b7\u6539\u8b8a\u8b8a\u91cf\u7684\u503c\uff0c\u4f46\u7531\u65bc\u5f7c\u6b64\u7684\u5f71\u97ff\uff0c\u6700\u7d42\u7121\u6cd5\u9054\u6210\u9810\u671f\u7684\u7d50\u679c\uff0c\u9019\u5c31\u662f\u6d3b\u9396\u3002<\/p>\n
\u9951\u9913\uff08Starvation\uff09<\/h2>\n
\u9951\u9913\u662f\u6307\u67d0\u500b\u9032\u7a0b\u56e0\u70ba\u8cc7\u6e90\u5206\u914d\u4e0d\u5747\u800c\u7121\u6cd5\u7372\u5f97\u6240\u9700\u7684\u8cc7\u6e90\uff0c\u5f9e\u800c\u7121\u6cd5\u57f7\u884c\u3002\u9019\u901a\u5e38\u767c\u751f\u5728\u512a\u5148\u7d1a\u8abf\u5ea6\u4e2d\uff0c\u67d0\u4e9b\u9ad8\u512a\u5148\u7d1a\u7684\u9032\u7a0b\u4e0d\u65b7\u4f54\u7528\u8cc7\u6e90\uff0c\u5c0e\u81f4\u4f4e\u512a\u5148\u7d1a\u7684\u9032\u7a0b\u7121\u6cd5\u57f7\u884c\u3002<\/p>\n
\u9951\u9913\u793a\u4f8b<\/h3>\n
package main\n\nimport (\n    \"fmt\"\n    \"sync\"\n    \"time\"\n)\n\nfunc main() {\n    var mu sync.Mutex\n    var wg sync.WaitGroup\n\n    for i := 0; i < 5; i++ {\n        wg.Add(1)\n        go func(id int) {\n            defer wg.Done()\n            for {\n                mu.Lock()\n                fmt.Printf("Goroutine %d is runningn", id)\n                mu.Unlock()\n                time.Sleep(100 * time.Millisecond)\n            }\n        }(i)\n    }\n\n    go func() {\n        for {\n            mu.Lock()\n            fmt.Println("High priority goroutine is running")\n            mu.Unlock()\n            time.Sleep(50 * time.Millisecond)\n        }\n    }()\n\n    wg.Wait()\n}\n<\/code><\/pre>\n
\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u9ad8\u512a\u5148\u7d1a\u7684 goroutine \u4e0d\u65b7\u4f54\u7528\u9396\uff0c\u5c0e\u81f4\u5176\u4ed6\u4f4e\u512a\u5148\u7d1a\u7684 goroutine \u7121\u6cd5\u7372\u5f97\u57f7\u884c\u7684\u6a5f\u6703\uff0c\u9019\u5c31\u662f\u9951\u9913\u7684\u60c5\u6cc1\u3002<\/p>\n
\u7e3d\u7d50<\/h2>\n
\u5728 Go \u8a9e\u8a00\u4e2d\uff0c\u7406\u89e3\u6b7b\u9396\u3001\u6d3b\u9396\u548c\u9951\u9913\u7684\u6982\u5ff5\u5c0d\u65bc\u7de8\u5beb\u9ad8\u6548\u7684\u4e26\u767c\u7a0b\u5e8f\u81f3\u95dc\u91cd\u8981\u3002\u901a\u904e\u5408\u7406\u7684\u8a2d\u8a08\u548c\u8cc7\u6e90\u7ba1\u7406\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u907f\u514d\u9019\u4e9b\u554f\u984c\u7684\u767c\u751f\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u80fd\u548c\u7a69\u5b9a\u6027\u7684\u61c9\u7528\u7a0b\u5e8f\uff0c\u9078\u64c7\u5408\u9069\u7684 VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4e5f\u662f\u4e00\u500b\u91cd\u8981\u7684\u8003\u91cf\u3002\u4e86\u89e3\u9019\u4e9b\u6982\u5ff5\u5c07\u5e6b\u52a9\u958b\u767c\u8005\u5728\u8a2d\u8a08\u7cfb\u7d71\u6642\u505a\u51fa\u66f4\u660e\u667a\u7684\u6c7a\u7b56\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u4e86\u89e3Go\u8a9e\u8a00\u4e2d\u7684\u6b7b\u9396\u3001\u6d3b\u9396\u548c\u9951\u9913\u554f\u984c\uff0c\u638c\u63e1\u89e3\u6c7a\u65b9\u6848\uff0c\u63d0\u5347\u7a0b\u5f0f\u8a2d\u8a08\u6548\u7387\u8207\u7a69\u5b9a\u6027\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4924],"tags":[],"class_list":["post-57700","post","type-post","status-publish","format-standard","hentry","category-setup-tutorials"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/57700","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=57700"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/57700\/revisions"}],"predecessor-version":[{"id":57701,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/57700\/revisions\/57701"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=57700"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=57700"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=57700"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}