{"id":205488,"date":"2025-06-04T10:58:41","date_gmt":"2025-06-04T02:58:41","guid":{"rendered":"https:\/\/server.hk\/cnblog\/?p=205488"},"modified":"2025-06-04T10:58:41","modified_gmt":"2025-06-04T02:58:41","slug":"go%e8%af%ad%e8%a8%80%e4%b8%ad%e7%9a%84%e5%8d%8f%e7%a8%8b%e6%9c%ba%e5%88%b6%e4%b8%8e%e5%b9%b6%e5%8f%91%e6%a8%a1%e5%9e%8b%e8%af%a6%e8%a7%a3%ef%bc%9a%e9%ab%98%e6%95%88%e5%b9%b6%e5%8f%91%e7%9a%84%e7%a7%98","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/205488\/","title":{"rendered":"Go\u8bed\u8a00\u4e2d\u7684\u534f\u7a0b\u673a\u5236\u4e0e\u5e76\u53d1\u6a21\u578b\u8be6\u89e3\uff1a\u9ad8\u6548\u5e76\u53d1\u7684\u79d8\u5bc6\u6b66\u5668"},"content":{"rendered":"

 <\/p>\n

\u524d\u8a00<\/h2>\n

\u5728\u73b0\u4ee3\u4e91\u8ba1\u7b97\u4e0e\u9ad8\u6027\u80fd\u5e94\u7528\u7684\u5f00\u53d1\u573a\u666f\u4e2d\uff0c\u5982\u4f55\u9ad8\u6548\u8c03\u5ea6\u8d44\u6e90\u3001\u63d0\u5347\u7a0b\u5e8f\u5e76\u53d1\u80fd\u529b\uff0c\u6210\u4e3a\u6280\u672f\u4eba\u5458\u6700\u4e3a\u5173\u6ce8\u7684\u6838\u5fc3\u8bdd\u9898\u3002Go\u8bed\u8a00\u4f5c\u4e3a\u4e00\u95e8\u5929\u751f\u652f\u6301\u5e76\u53d1\u7684\u7f16\u7a0b\u8bed\u8a00\uff0c\u5176\u5f15\u5165\u7684\u201c\u534f\u7a0b\u201d\uff08Goroutine\uff09\u673a\u5236\u4e3a\u5f00\u53d1\u8005\u63d0\u4f9b\u4e86\u524d\u6240\u672a\u6709\u7684\u8f7b\u91cf\u7ea7\u5e76\u53d1\u6a21\u578b\u3002<\/p>\n

\u672c\u7bc7\u6587\u7ae0\u5c06\u5e26\u60a8\u6df1\u5165\u4e86\u89e3Go\u8bed\u8a00\u4e2d\u7684\u534f\u7a0b\u53ca\u5176\u5e76\u53d1\u6a21\u578b\u7684\u5e95\u5c42\u539f\u7406\u4e0e\u6700\u4f73\u5b9e\u8df5\uff0c\u5e76\u7ed3\u5408\u670d\u52a1\u5668\u8d44\u6e90\u4f18\u5316\u573a\u666f\uff0c\u5206\u6790\u5176\u5728\u9999\u6e2f\u4e91\u670d\u52a1\u5668\u90e8\u7f72\u4e2d\u7684\u5b9e\u6218\u5e94\u7528\u3002<\/p>\n

\n

\u4e00\u3001\u534f\u7a0b\u7684\u672c\u8d28\uff1a\u8f7b\u91cf\u7ea7\u7ebf\u7a0b\u7684\u9b54\u529b<\/h2>\n

Go\u8bed\u8a00\u4e2d\u7684\u534f\u7a0b\uff08Goroutine\uff09\u53ef\u89c6\u4e3a\u4e00\u79cd\u66f4\u8f7b\u4fbf\u7684\u7ebf\u7a0b\u673a\u5236\u3002\u76f8\u6bd4\u4f20\u7edf\u7ebf\u7a0b\uff0c\u534f\u7a0b\u7684\u5185\u5b58\u5360\u7528\u66f4\u5c0f\u3001\u8c03\u5ea6\u6210\u672c\u66f4\u4f4e\u3002<\/p>\n

\u534f\u7a0b\u4e0e\u7ebf\u7a0b\u5bf9\u6bd4<\/h3>\n\n\n\n\n\n\n
\u9879\u76ee<\/th>\n\u7ebf\u7a0b Thread<\/th>\n\u534f\u7a0b Goroutine<\/th>\n<\/tr>\n<\/thead>\n
\u9ed8\u8ba4\u6808\u5927\u5c0f<\/td>\n1MB<\/td>\n2KB<\/td>\n<\/tr>\n
\u5185\u6838\u8c03\u5ea6\u65b9\u5f0f<\/td>\n1:1<\/td>\nM:N<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u901a\u8fc7\u8fd9\u79cd\u8c03\u5ea6\u6a21\u578b\uff0c\u6570\u4e07\u4e2a\u534f\u7a0b\u53ef\u4ee5\u5728\u8f83\u5c11\u7684\u5185\u6838\u7ebf\u7a0b\u4e2d\u9ad8\u6548\u5207\u6362\u6267\u884c\uff0c\u6781\u5927\u63d0\u5347\u4e86\u5e76\u53d1\u5904\u7406\u80fd\u529b\uff0c\u8fd9\u5bf9\u4e8e\u8fd0\u884c\u5728\u9ad8\u5e76\u53d1\u73af\u5883\u4e0b\u7684\u9999\u6e2fvps<\/strong>\u90e8\u7f72\u5c24\u4e3a\u91cd\u8981\u3002<\/p>\n

\n

\u4e8c\u3001\u534f\u7a0b\u7684\u4f7f\u7528\u65b9\u5f0f\u4e0e\u5e76\u53d1\u793a\u4f8b<\/h2>\n

\u5728Go\u4e2d\u542f\u52a8\u4e00\u4e2a\u534f\u7a0b\u7684\u8bed\u6cd5\u975e\u5e38\u7b80\u5355\uff0c\u53ea\u9700\u52a0\u4e0a go<\/code> \u5173\u952e\u5b57\uff1a<\/p>\n

func TestGoroutine(t *testing.T) {\r\n\tfor i := 0; i < 10; i++ {\r\n\t\tgo func(i int) {\r\n\t\t\tfmt.Println(i) \/\/ \u6b63\u786e\u793a\u4f8b\r\n\t\t}(i)\r\n\t}\r\n\ttime.Sleep(50 * time.Millisecond)\r\n}\r\n<\/code><\/pre>\n
\u6ce8\u610f\u4e0d\u8981\u5728\u534f\u7a0b\u4e2d\u76f4\u63a5\u8bbf\u95ee\u5faa\u73af\u53d8\u91cf\uff0c\u907f\u514d\u4ea7\u751f\u7ade\u6001\u6761\u4ef6\u3002<\/p>\n
\n
\u4e09\u3001\u534f\u7a0b\u5b89\u5168\uff1a\u5171\u4eab\u5185\u5b58\u7684\u52a0\u9501\u7b56\u7565<\/h2>\n
\u5f53\u591a\u4e2a\u534f\u7a0b\u540c\u65f6\u8bbf\u95ee\u5171\u4eab\u53d8\u91cf\u65f6\uff0c\u5fc5\u987b\u91c7\u7528\u52a0\u9501\u673a\u5236\u6765\u4fdd\u8bc1\u6570\u636e\u7684\u4e00\u81f4\u6027\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u672a\u52a0\u9501\u7684\u5e76\u53d1\u793a\u4f8b\uff1a<\/p>\n
func TestUnsafeCounter(t *testing.T) {\r\n\tcounter := 0\r\n\tfor i := 0; i < 5000; i++ {\r\n\t\tgo func() { counter++ }()\r\n\t}\r\n\ttime.Sleep(1 * time.Second)\r\n\tt.Logf(\"counter = %d\", counter)\r\n}\r\n<\/code><\/pre>\n
\u8be5\u4f8b\u4e2d\u7531\u4e8e\u5e76\u53d1\u64cd\u4f5c\u672a\u540c\u6b65\uff0c\u5bfc\u81f4\u7ed3\u679c\u504f\u5dee\u3002\u53ef\u91c7\u7528\u4e92\u65a5\u9501\uff08Mutex\uff09\u52a0\u4ee5\u4fee\u6b63\uff1a<\/p>\n
func TestSafeCounter(t *testing.T) {\r\n\tvar mu sync.Mutex\r\n\tcounter := 0\r\n\tfor i := 0; i < 5000; i++ {\r\n\t\tgo func() {\r\n\t\t\tmu.Lock()\r\n\t\t\tcounter++\r\n\t\t\tmu.Unlock()\r\n\t\t}()\r\n\t}\r\n\ttime.Sleep(1 * time.Second)\r\n\tt.Logf(\"counter = %d\", counter)\r\n}\r\n<\/code><\/pre>\n
\u63a8\u8350\u4f7f\u7528 WaitGroup<\/code> \u8fdb\u884c\u534f\u7a0b\u4efb\u52a1\u7684\u540c\u6b65\uff0c\u786e\u4fdd\u7a0b\u5e8f\u5728\u6240\u6709\u4efb\u52a1\u5b8c\u6210\u540e\u7edf\u4e00\u5904\u7406\u7ed3\u679c\u3002<\/p>\n
\n
\u56db\u3001CSP\u5e76\u53d1\u6a21\u578b\u4e0eChannel\u673a\u5236<\/h2>\n
Go\u8bed\u8a00\u63d0\u5021\u201c\u4e0d\u8981\u901a\u8fc7\u5171\u4eab\u5185\u5b58\u6765\u901a\u4fe1\uff0c\u800c\u5e94\u901a\u8fc7\u901a\u4fe1\u6765\u5171\u4eab\u5185\u5b58\u201d\u3002Channel\u662fGolang CSP\u5e76\u53d1\u6a21\u578b\u7684\u5173\u952e\u7ec4\u4ef6\u3002<\/p>\n
\u65e0\u7f13\u51b2\u4e0e\u7f13\u51b2\u901a\u9053<\/h3>\n
\/\/ \u65e0\u7f13\u51b2channel\r\nretChan := make(chan string)\r\n\r\n\/\/ \u6709\u7f13\u51b2channel\r\nretChan := make(chan string, 2)\r\n<\/code><\/pre>\n
\u7ed3\u5408 select<\/code> \u8bed\u6cd5\u53ef\u4ee5\u5b9e\u73b0\u591a\u8def\u9009\u62e9\uff1a<\/p>\n
select {\r\ncase msg := <-chan1:\r\n\tfmt.Println(msg)\r\ncase <-time.After(100 * time.Millisecond):\r\n\tfmt.Println(\"Timeout\")\r\n}\r\n<\/code><\/pre>\n
\n
\u4e94\u3001\u5e7f\u64ad\u4e0e\u5173\u95edChannel\u7684\u5b9e\u6218\u6280\u5de7<\/h2>\n
\u5f53Channel\u88ab\u5173\u95ed\u540e\uff0c\u6240\u6709\u76d1\u542c\u8005\u90fd\u4f1a\u7acb\u523b\u54cd\u5e94\uff0c\u53ef\u7528\u4e8e\u5e7f\u64ad\u4efb\u52a1\u7ec8\u6b62\u4fe1\u53f7\uff1a<\/p>\n
func producer(ch chan int) {\r\n\tfor i := 0; i < 10; i++ {\r\n\t\tch <- i\r\n\t}\r\n\tclose(ch)\r\n}\r\n<\/code><\/pre>\n
func consumer(ch chan int) {\r\n\tfor {\r\n\t\tif data, ok := <-ch; ok {\r\n\t\t\tfmt.Println(data)\r\n\t\t} else {\r\n\t\t\tbreak\r\n\t\t}\r\n\t}\r\n}\r\n<\/code><\/pre>\n
\u8fd9\u4e00\u7279\u6027\u5728\u9999\u6e2f\u4e91\u670d\u52a1\u5668<\/strong>\u4e2d\u7ba1\u7406\u5206\u5e03\u5f0f\u5fae\u670d\u52a1\u72b6\u6001\u5e7f\u64ad\u65f6\u6709\u6781\u9ad8\u7684\u5b9e\u7528\u4ef7\u503c\u3002<\/p>\n
\n
\u516d\u3001\u534f\u7a0b\u4efb\u52a1\u53d6\u6d88\u673a\u5236<\/h2>\n
\u901a\u8fc7\u5411Channel\u53d1\u9001\u5173\u95ed\u4fe1\u53f7\uff0c\u53ef\u4ee5\u4f18\u96c5\u5730\u4e2d\u6b62\u591a\u4e2a\u5e76\u53d1\u4efb\u52a1\uff0c\u786e\u4fdd\u8d44\u6e90\u53ca\u65f6\u91ca\u653e\u548c\u670d\u52a1\u7a33\u5b9a\u6027\u3002<\/p>\n
func isCancelled(cancelChan chan struct{}) bool {\r\n\tselect {\r\n\tcase <-cancelChan:\r\n\t\treturn true\r\n\tdefault:\r\n\t\treturn false\r\n\t}\r\n}\r\n<\/code><\/pre>\n
\u5f53\u4e0b\uff0c\u9ad8\u5e76\u53d1\u7cfb\u7edf\u4e0e\u5fae\u670d\u52a1\u67b6\u6784\u65e5\u76ca\u666e\u53ca\uff0c\u501f\u52a9Go\u8bed\u8a00\u534f\u7a0b\u6a21\u578b\u642d\u914d\u9ad8\u6027\u80fd\u7684\u9999\u6e2f\u72ec\u7acb\u670d\u52a1\u5668<\/strong><\/a>\u90e8\u7f72\u65b9\u6848\uff0c\u80fd\u591f\u5b9e\u73b0\u9ad8\u541e\u5410\u91cf\u4e0e\u6781\u4f4e\u5ef6\u8fdf\u7684\u4e1a\u52a1\u54cd\u5e94\u3002\u82e5\u60a8\u6b63\u5728\u5bfb\u627e\u652f\u6301Golang\u5e76\u53d1\u6a21\u578b\u7684\u9ad8\u6027\u80fd\u4e91\u73af\u5883\uff0c\u53ef\u4f18\u5148\u8003\u8651\u9999\u6e2f\u672c\u5730\u5316\u670d\u52a1\u5668\u8d44\u6e90\uff0c\u5177\u5907\u7a33\u5b9a\u7684\u7f51\u7edc\u8fde\u63a5\u4e0e\u7075\u6d3b\u7684\u8ba1\u7b97\u80fd\u529b\uff0c\u52a9\u529b\u7cfb\u7edf\u5e76\u53d1\u5904\u7406\u6027\u80fd\u6700\u5927\u5316\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
  \u524d\u8a00 \u5728\u73b0\u4ee3\u4e91\u8ba1\u7b97...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4924],"tags":[],"class_list":["post-205488","post","type-post","status-publish","format-standard","hentry","category-setup-tutorials"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/205488","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=205488"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/205488\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=205488"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=205488"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=205488"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}