{"id":44275,"date":"2023-11-21T21:39:02","date_gmt":"2023-08-06T18:40:34","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/go%e4%b8%a6%e5%88%97%e7%ad%86%e8%a8%98\/"},"modified":"2024-05-04T10:11:01","modified_gmt":"2024-05-04T02:11:01","slug":"go%e4%b8%a6%e5%88%97%e7%ad%86%e8%a8%98","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/go%e4%b8%a6%e5%88%97%e7%ad%86%e8%a8%98\/","title":{"rendered":"Go\u4e26\u5217\u7b46\u8a18"},"content":{"rendered":"

\u7b49\u5f85\u7ec4\u6dfb\u52a0\u3001\u7b49\u5f85\u7ec4\u7b49\u5f85<\/h2>\n
func<\/span> Afunction<\/span>(<\/span>num<\/span> int<\/span>)<\/span> {<\/span>\r\n    fmt<\/span>.<\/span>Println<\/span>(<\/span>num<\/span>)<\/span>\r\n    waitgroup<\/span>.<\/span>Done<\/span>()<\/span> \/\/\u30bf\u30b9\u30af\u4e00\u500b\u7d42\u4e86\u3001\u30bf\u30b9\u30af\u6570-1\u3001\u5b9f\u969b.Done\u306f.Add(-1) <\/span>\r\n}<\/span>\r\n\r\nfunc<\/span> main<\/span>()<\/span> {<\/span>\r\n    for<\/span> i<\/span> :=<\/span> 0<\/span>;<\/span> i<\/span> <<\/span> 10<\/span>;<\/span> i<\/span>++<\/span> {<\/span>\r\n        waitgroup<\/span>.<\/span>Add<\/span>(<\/span>1<\/span>)<\/span> \/\/goroutine\u3054\u3068\u3067\u3001\u30bf\u30b9\u30af+1\u3001(\u5168\u4f5310\u306a\u306e\u3067\u300110\u56de\u7e70\u308a\u8fd4\u3059)<\/span>\r\n        go<\/span> Afunction<\/span>(<\/span>i<\/span>)<\/span>\r\n    }<\/span>\r\n    waitgroup<\/span>.<\/span>Wait<\/span>()<\/span> \/\/.Wait()\u3053\u3053\u3067\u5f85\u3064<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u4ed6\u5728\u56fe\u4e66\u9986\u5b66\u4e60\u4e86\u4e00\u6574\u5929\u3002<\/h2>\n
func<\/span> main<\/span>()<\/span> {<\/span>\r\n\r\n    var<\/span> wg<\/span> sync<\/span>.<\/span>WaitGroup<\/span>\r\n    wg<\/span>.<\/span>Add<\/span>(<\/span>3<\/span>)<\/span>\r\n    for<\/span> i<\/span> :=<\/span> 0<\/span>;<\/span> i<\/span> <<\/span> 3<\/span>;<\/span> i<\/span>++<\/span> {<\/span>\r\n        go<\/span> func<\/span>(<\/span>i<\/span> int<\/span>)<\/span> {<\/span>\r\n            defer<\/span> wg<\/span>.<\/span>Done<\/span>()<\/span>\r\n            fmt<\/span>.<\/span>Println<\/span>(<\/span>\"reading\"<\/span>,<\/span> i<\/span>)<\/span>\r\n        }(<\/span>i<\/span>)<\/span>\r\n    }<\/span>\r\n\r\n    fmt<\/span>.<\/span>Println<\/span>(<\/span>\"ready go\"<\/span>)<\/span>\r\n    wg<\/span>.<\/span>Wait<\/span>()<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u4e0d\u6b63\u786e\u7684\u5199\u6cd5\uff1a<\/p>\n
func<\/span> main<\/span>()<\/span> {<\/span>\r\n\r\n    var<\/span> wg<\/span> sync<\/span>.<\/span>WaitGroup<\/span>\r\n    for<\/span> i<\/span> :=<\/span> 0<\/span>;<\/span> i<\/span> <<\/span> 3<\/span>;<\/span> i<\/span>++<\/span> {<\/span>\r\n            wg<\/span>.<\/span>Add<\/span>(<\/span>1<\/span>)<\/span> \/\/\u3053\u3053\u304c\u9055\u3046\u3060\u3088\uff01<\/span>\r\n        go<\/span> func<\/span>(<\/span>i<\/span> int<\/span>)<\/span> {<\/span>\r\n            defer<\/span> wg<\/span>.<\/span>Done<\/span>()<\/span>\r\n            fmt<\/span>.<\/span>Println<\/span>(<\/span>\"reading\"<\/span>,<\/span> i<\/span>)<\/span>\r\n        }(<\/span>i<\/span>)<\/span>\r\n    }<\/span>\r\n\r\n    fmt<\/span>.<\/span>Println<\/span>(<\/span>\"ready go\"<\/span>)<\/span>\r\n    wg<\/span>.<\/span>Wait<\/span>()<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\/\/\u7d50\u679c\uff1a\r\nready go\r\nreading 0\r\nreading 1\r\nreading 2\r\n<\/code><\/pre>\n
\u7b2c\u4e8c\u4e2a\u4f8b\u5b50\uff1a<\/h2>\n
func<\/span> main<\/span>()<\/span> {<\/span>\r\n\r\n    var<\/span> wg<\/span> sync<\/span>.<\/span>WaitGroup<\/span>\r\n    wg<\/span>.<\/span>Add<\/span>(<\/span>1<\/span>)<\/span> \r\n\r\n    go<\/span> func<\/span>()<\/span> {<\/span>\r\n        fmt<\/span>.<\/span>Println<\/span>(<\/span>\"wait1 enter\"<\/span>)<\/span>\r\n        wg<\/span>.<\/span>Wait<\/span>()<\/span>\r\n        fmt<\/span>.<\/span>Println<\/span>(<\/span>\"wait1 exit\"<\/span>)<\/span>\r\n    }()<\/span>\r\n\r\n    go<\/span> func<\/span>()<\/span> {<\/span>\r\n        fmt<\/span>.<\/span>Println<\/span>(<\/span>\"wait2 enter\"<\/span>)<\/span>\r\n        wg<\/span>.<\/span>Wait<\/span>()<\/span>\r\n        fmt<\/span>.<\/span>Println<\/span>(<\/span>\"wait2 exit\"<\/span>)<\/span>\r\n    }()<\/span>\r\n\r\n    go<\/span> func<\/span>()<\/span> {<\/span>\r\n        fmt<\/span>.<\/span>Println<\/span>(<\/span>\"wait3 enter\"<\/span>)<\/span>\r\n        wg<\/span>.<\/span>Wait<\/span>()<\/span>\r\n        fmt<\/span>.<\/span>Println<\/span>(<\/span>\"wait3 exit\"<\/span>)<\/span>\r\n    }()<\/span>\r\n\r\n    go<\/span> func<\/span>()<\/span> {<\/span>\r\n        fmt<\/span>.<\/span>Println<\/span>(<\/span>\"done\"<\/span>)<\/span>\r\n        wg<\/span>.<\/span>Add<\/span>(<\/span>-<\/span>1<\/span>)<\/span>\r\n    }()<\/span>\r\n\r\n    wg<\/span>.<\/span>Wait<\/span>()<\/span> \r\n    time<\/span>.<\/span>Sleep<\/span>(<\/span>time<\/span>.<\/span>Second<\/span>)<\/span>\r\n    fmt<\/span>.<\/span>Println<\/span>(<\/span>\"main exit\"<\/span>)<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\/\/\u51fa\u529b1<\/span>\r\nwait3<\/span> enter<\/span>\r\nwait2<\/span> enter<\/span>\r\nwait1<\/span> enter<\/span>\r\ndone<\/span>\r\nwait1<\/span> exit<\/span>\r\nwait3<\/span> exit<\/span>\r\nwait2<\/span> exit<\/span>\r\n\r\n\/\/\u51fa\u529b2<\/span>\r\ndone<\/span>\r\nwait1<\/span> enter<\/span>\r\nwait1<\/span> exit<\/span>\r\nwait2<\/span> enter<\/span>\r\nwait2<\/span> exit<\/span>\r\nwait3<\/span> enter<\/span>\r\nwait3<\/span> exit<\/span>\r\nmain<\/span> exit<\/span>\r\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
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