{"id":44344,"date":"2023-03-06T10:57:40","date_gmt":"2023-06-09T06:38:16","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%af%bb%e6%89%begolang%e7%9a%84%e7%94%a8%e6%b3%95\/"},"modified":"2024-04-29T17:36:49","modified_gmt":"2024-04-29T09:36:49","slug":"%e5%af%bb%e6%89%begolang%e7%9a%84%e7%94%a8%e6%b3%95","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%af%bb%e6%89%begolang%e7%9a%84%e7%94%a8%e6%b3%95\/","title":{"rendered":"\u5bfb\u627egolang\u7684\u7528\u6cd5"},"content":{"rendered":"<p>\u5b9e\u65f6\u66f4\u65b0<\/p>\n<h1>Go\u534f\u7a0b\u548c\u901a\u9053\u3002<\/h1>\n<h2>\u7b49\u5f85goroutine\u7ed3\u675f<\/h2>\n<p>\u8fd9\u662f\u4e00\u7bc7\u5f88\u597d\u7684\u6587\u7ae0\u3002<\/p>\n<p>\u5982\u679c\u53ea\u662f\u7b49\u5f85\u4e00\u4e2agoroutine\uff0c\u53ef\u4ee5\u4f7f\u7528channel\u6765\u5904\u7406\uff1a<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">package<\/span> <span class=\"n\">main<\/span>\r\n\r\n<span class=\"k\">import<\/span> <span class=\"s\">\"log\"<\/span>\r\n\r\n<span class=\"k\">func<\/span> <span class=\"n\">main<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"n\">ch<\/span> <span class=\"o\">:=<\/span> <span class=\"nb\">make<\/span><span class=\"p\">(<\/span><span class=\"k\">chan<\/span> <span class=\"kt\">int<\/span><span class=\"p\">)<\/span>\r\n  <span class=\"k\">go<\/span> <span class=\"k\">func<\/span><span class=\"p\">(<\/span><span class=\"n\">ch<\/span> <span class=\"k\">chan<\/span> <span class=\"kt\">int<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"c\">\/\/ do something<\/span>\r\n\r\n    <span class=\"n\">log<\/span><span class=\"o\">.<\/span><span class=\"n\">Printf<\/span><span class=\"p\">(<\/span><span class=\"s\">\"end of goroutine\"<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"n\">ch<\/span> <span class=\"o\">&lt;-<\/span> <span class=\"m\">1<\/span>\r\n  <span class=\"p\">}(<\/span><span class=\"n\">ch<\/span><span class=\"p\">)<\/span>\r\n  <span class=\"n\">log<\/span><span class=\"o\">.<\/span><span class=\"n\">Printf<\/span><span class=\"p\">(<\/span><span class=\"s\">\"waiting for goroutine\"<\/span><span class=\"p\">)<\/span>\r\n  <span class=\"o\">&lt;-<\/span> <span class=\"n\">ch<\/span>\r\n  <span class=\"n\">log<\/span><span class=\"o\">.<\/span><span class=\"n\">Printf<\/span><span class=\"p\">(<\/span><span class=\"s\">\"end of main\"<\/span><span class=\"p\">)<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u542c\u8bf4\u5982\u679c\u8981\u7b49\u5f85\u591a\u4e2agoroutine\uff0c\u53ef\u4ee5\u4f7f\u7528sync.WaitGroup\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">package<\/span> <span class=\"n\">main<\/span>\r\n\r\n<span class=\"k\">import<\/span> <span class=\"p\">(<\/span>\r\n  <span class=\"s\">\"log\"<\/span>\r\n  <span class=\"s\">\"sync\"<\/span>\r\n<span class=\"p\">)<\/span>\r\n\r\n<span class=\"k\">func<\/span> <span class=\"n\">main<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"k\">var<\/span> <span class=\"n\">wg<\/span> <span class=\"n\">sync<\/span><span class=\"o\">.<\/span><span class=\"n\">WaitGroup<\/span>\r\n  <span class=\"k\">for<\/span> <span class=\"n\">i<\/span> <span class=\"o\">:=<\/span> <span class=\"m\">0<\/span><span class=\"p\">;<\/span> <span class=\"n\">i<\/span> <span class=\"o\">&lt;<\/span> <span class=\"m\">3<\/span><span class=\"p\">;<\/span> <span class=\"n\">i<\/span><span class=\"o\">++<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"n\">wg<\/span><span class=\"o\">.<\/span><span class=\"n\">Add<\/span><span class=\"p\">(<\/span><span class=\"m\">1<\/span><span class=\"p\">)<\/span> <span class=\"c\">\/\/ goroutine\u306e\u6570\u3060\u3051Add()<\/span>\r\n    <span class=\"k\">go<\/span> <span class=\"k\">func<\/span><span class=\"p\">(<\/span><span class=\"n\">i<\/span> <span class=\"kt\">int<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n      <span class=\"k\">defer<\/span> <span class=\"n\">wg<\/span><span class=\"o\">.<\/span><span class=\"n\">Done<\/span><span class=\"p\">()<\/span> <span class=\"c\">\/\/ goroutine\u3092\u629c\u3051\u305f\u3089Done()<\/span>\r\n      <span class=\"n\">log<\/span><span class=\"o\">.<\/span><span class=\"n\">Printf<\/span><span class=\"p\">(<\/span><span class=\"s\">\"goroutine: %d\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">i<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"p\">}(<\/span><span class=\"n\">i<\/span><span class=\"p\">)<\/span>\r\n  <span class=\"p\">}<\/span>\r\n  <span class=\"n\">log<\/span><span class=\"o\">.<\/span><span class=\"n\">Printf<\/span><span class=\"p\">(<\/span><span class=\"s\">\"waiting for goroutines\"<\/span><span class=\"p\">)<\/span>\r\n  <span class=\"n\">wg<\/span><span class=\"o\">.<\/span><span class=\"n\">Wait<\/span><span class=\"p\">()<\/span> <span class=\"c\">\/\/ \u3053\u3053\u3067block\u3057\u3066\u5f85\u3064<\/span>\r\n  <span class=\"n\">log<\/span><span class=\"o\">.<\/span><span class=\"n\">Printf<\/span><span class=\"p\">(<\/span><span class=\"s\">\"end of main\"<\/span><span class=\"p\">)<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u987a\u4fbf\u63d0\u4e00\u4e0b\uff0c\u867d\u7136\u662f\u7ec6\u8282\u95ee\u9898\uff0c\u4f46\u662f\u8981\u6ce8\u610f\u7684\u662f\uff0c\u7531\u4e8eDone() \u88ab\u8c03\u7528\u540e\u7acb\u5373\u7ed3\u675f\uff0c\u6240\u4ee5\u5982\u679c\u9700\u8981\u8c03\u7528\u591a\u4e2adefer\u7684\u60c5\u51b5\u4e0b\uff0c\u5982\u679c\u6ca1\u6709\u5c06 Done() \u653e\u5728\u7b2c\u4e00\u4e2a\u4f4d\u7f6e\uff0c\u5176\u4ed6\u7684defer\u6709\u53ef\u80fd\u4f1a\u5728 Done() \u88ab\u8c03\u7528\u4e4b\u524d\u5c31\u7ed3\u675f\u4e86\u6574\u4e2a\u8fdb\u7a0b\uff08defer\u662f\u6309\u7167LIFO\u7684\u987a\u5e8f\u6267\u884c\u7684\uff1ahttp:\/\/blog.golang.org\/defer-panic-and-recover\uff09\u3002<\/p>\n<h1>\u5efa\u8bbe<\/h1>\n<h2>\u5c06debug\u548crelease\u6784\u5efa\u5206\u5f00<\/h2>\n<p>\u6211\u4eec\u4f7f\u7528build tag\uff08\u6784\u5efa\u6807\u7b7e\uff09\u3002\u4f8b\u5982\uff0c\u6211\u4eec\u5728env package\u4e2d\u521b\u5efaenv_debug.go\u548cenv_release.go\u8fd9\u4e24\u4e2a\u6587\u4ef6\uff0c\u5e76\u5206\u522b\u5728\u5b83\u4eec\u4e2d\u5199\u5165\u6784\u5efa\u6761\u4ef6\u3002\u53ea\u6709\u4e0ebuild tag\u76f8\u5339\u914d\u7684\u6587\u4ef6\u624d\u4f1a\u88ab\u6784\u5efa\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"c\">\/\/ +build !release<\/span>\r\n\r\n<span class=\"k\">package<\/span> <span class=\"n\">env<\/span>\r\n\r\n<span class=\"k\">const<\/span> <span class=\"n\">DEBUG<\/span> <span class=\"o\">=<\/span> <span class=\"no\">true<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"c\">\/\/ +build release<\/span>\r\n\r\n<span class=\"k\">package<\/span> <span class=\"n\">env<\/span>\r\n\r\n<span class=\"k\">const<\/span> <span class=\"n\">DEBUG<\/span> <span class=\"o\">=<\/span> <span class=\"no\">false<\/span>\r\n<\/code><\/pre>\n<p>\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c&#8221;\/\/ +build &#8230;&#8221;\u9700\u8981\u5199\u5728\u7b2c\u4e00\u884c\uff0c\u5e76\u4e14\u9700\u8981\u5728\u7b2c\u4e00\u884c\u4e0a\u7559\u51fa\u4e00\u884c\u7a7a\u884c\u3002\u7136\u540e\uff0c\u6211\u4eec\u901a\u8fc7import\u8fd9\u4e2apackage\u6765\u533a\u5206\u884c\u4e3a\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">package<\/span> <span class=\"n\">main<\/span>\r\n\r\n<span class=\"k\">import<\/span> <span class=\"p\">(<\/span>\r\n  <span class=\"s\">\"github.com\/user\/app\/env\"<\/span>\r\n<span class=\"p\">)<\/span>\r\n\r\n<span class=\"k\">func<\/span> <span class=\"n\">main<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"k\">if<\/span> <span class=\"n\">env<\/span><span class=\"o\">.<\/span><span class=\"n\">DEBUG<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"c\">\/\/ ...<\/span>\r\n  <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u8c03\u8bd5\u7248\u672c<\/p>\n<pre class=\"post-pre\"><code>$ go build github.com\/user\/app\r\n<\/code><\/pre>\n<p>So, the release build is&#8230;<\/p>\n<p>\u6240\u4ee5\uff0c\u53d1\u5e03\u7248\u672c\u662f&#8230;<\/p>\n<pre class=\"post-pre\"><code>$ go build -a -tags=release github.com\/user\/app\r\n<\/code><\/pre>\n<p>\u5982\u679c\u53ea\u66f4\u6539\u4e86build tag\uff0c\u5219\u53ef\u80fd\u65e0\u6cd5\u6b63\u786e\u5730\u91cd\u65b0\u6784\u5efa\u6240\u6709\u5e93\uff0c\u6240\u4ee5\u6700\u597d\u4f7f\u7528-a\u9009\u9879\u3002<\/p>\n<h1>\u5176\u4ed6<\/h1>\n<h2>\u83b7\u53d6\u8c03\u7528\u65b9\u7684func\u3002<\/h2>\n<pre class=\"post-pre\"><code>pc, _, _, _ := runtime.Caller(1)\r\ncaller_name := runtime.FuncForPC(pc).Name();\r\n<\/code><\/pre>\n<p>\u5982\u679c\u6709DEBUG\u6807\u5fd7\u7b49\u7684\u8bdd\uff0c\u53ef\u4ee5\u505a\u5230\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">import<\/span> <span class=\"p\">(<\/span>\r\n  <span class=\"s\">\"log\"<\/span>\r\n  <span class=\"s\">\"runtime\"<\/span>\r\n  <span class=\"s\">\"github.com\/user\/app\/env\"<\/span>\r\n<span class=\"p\">)<\/span>\r\n\r\n<span class=\"k\">func<\/span> <span class=\"n\">Debug<\/span><span class=\"p\">(<\/span><span class=\"n\">format<\/span> <span class=\"kt\">string<\/span><span class=\"p\">,<\/span> <span class=\"n\">args<\/span> <span class=\"o\">...<\/span><span class=\"k\">interface<\/span><span class=\"p\">{})<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"k\">if<\/span> <span class=\"n\">env<\/span><span class=\"o\">.<\/span><span class=\"n\">DEBUG<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"n\">pc<\/span><span class=\"p\">,<\/span> <span class=\"n\">_<\/span><span class=\"p\">,<\/span> <span class=\"n\">_<\/span><span class=\"p\">,<\/span> <span class=\"n\">_<\/span> <span class=\"o\">:=<\/span> <span class=\"n\">runtime<\/span><span class=\"o\">.<\/span><span class=\"n\">Caller<\/span><span class=\"p\">(<\/span><span class=\"m\">1<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"n\">caller_name<\/span> <span class=\"o\">:=<\/span> <span class=\"n\">runtime<\/span><span class=\"o\">.<\/span><span class=\"n\">FuncForPC<\/span><span class=\"p\">(<\/span><span class=\"n\">pc<\/span><span class=\"p\">)<\/span><span class=\"o\">.<\/span><span class=\"n\">Name<\/span><span class=\"p\">();<\/span>\r\n\r\n    <span class=\"n\">log<\/span><span class=\"o\">.<\/span><span class=\"n\">Printf<\/span><span class=\"p\">(<\/span><span class=\"n\">caller_name<\/span> <span class=\"o\">+<\/span> <span class=\"s\">\": \"<\/span> <span class=\"o\">+<\/span> <span class=\"n\">format<\/span><span class=\"p\">,<\/span> <span class=\"n\">args<\/span><span class=\"o\">...<\/span><span class=\"p\">)<\/span>\r\n  <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u6240\u4ee5\uff0c\u6211\u89c9\u5f97\u8c03\u8bd5\u65e5\u5fd7\u4f1a\u66f4\u5bb9\u6613\u8f93\u51fa\u3002<\/p>\n<h2>\u7701\u7565package\u7684\u524d\u7f00<\/h2>\n<pre class=\"post-pre\"><code><span class=\"k\">package<\/span> <span class=\"n\">main<\/span>\r\n\r\n<span class=\"k\">import<\/span> <span class=\"p\">(<\/span>\r\n  <span class=\"s\">\"log\"<\/span>\r\n<span class=\"p\">)<\/span>\r\n\r\n<span class=\"k\">func<\/span> <span class=\"n\">main<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"n\">log<\/span><span class=\"o\">.<\/span><span class=\"n\">Printf<\/span><span class=\"p\">(<\/span><span class=\"s\">\"hello\"<\/span><span class=\"p\">)<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u8981\u7701\u7565\u7c7b\u4f3c&#8221;log.&#8221;\u8fd9\u6837\u7684\u6587\u5b57\uff0c\u53ef\u4ee5\u8fd9\u6837\u8868\u8fbe\uff1a<\/p>\n<pre class=\"post-pre\"><code>import (\r\n  . \"log\"\r\n)\r\n<\/code><\/pre>\n<p>\u5047\u8bbe\u5982\u6b64<\/p>\n<pre class=\"post-pre\"><code>Printf(\"hello\")\r\n<\/code><\/pre>\n<p>\u6211\u53ef\u4ee5\u5199\u4e0b\u91cd\u8981\u7684\u77e5\u8bc6\u3002\u540c\u6837\u7684\uff0c<\/p>\n<pre class=\"post-pre\"><code>import (\r\n  foo \"log\"\r\n)\r\n<\/code><\/pre>\n<p>\u5982\u679c\u662f\u8fd9\u6837\u7684\u8bdd (\u5982\u679c\u8fd9\u6837\u7684\u8bdd)<\/p>\n<pre class=\"post-pre\"><code>foo.Printf(\"hello\")\r\n<\/code><\/pre>\n<p>\u53ef\u4ee5\u901a\u8fc7\u4e92\u8054\u7f51\u8bbf\u95ee\u3002<\/p>\n<h1>\u53e6\u8bf7\u53c2\u9605\u548c\u53c2\u8003\u7f51\u7ad9<\/h1>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">http:\/\/d.hatena.ne.jp\/taknb2nch\/20140414\/1397459204<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">http:\/\/jxck.hatenablog.com\/entry\/20130414\/1365960707<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u5b9e\u65f6\u66f4\u65b0 Go\u534f\u7a0b\u548c\u901a\u9053\u3002 \u7b49\u5f85goroutine\u7ed3\u675f \u8fd9\u662f\u4e00\u7bc7\u5f88\u597d\u7684\u6587\u7ae0\u3002 \u5982\u679c\u53ea\u662f\u7b49\u5f85\u4e00\u4e2agoroutin [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-44344","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u5bfb\u627egolang\u7684\u7528\u6cd5 - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/\u5bfb\u627egolang\u7684\u7528\u6cd5\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u5bfb\u627egolang\u7684\u7528\u6cd5\" \/>\n<meta property=\"og:description\" content=\"\u5b9e\u65f6\u66f4\u65b0 Go\u534f\u7a0b\u548c\u901a\u9053\u3002 \u7b49\u5f85goroutine\u7ed3\u675f \u8fd9\u662f\u4e00\u7bc7\u5f88\u597d\u7684\u6587\u7ae0\u3002 \u5982\u679c\u53ea\u662f\u7b49\u5f85\u4e00\u4e2agoroutin [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/\u5bfb\u627egolang\u7684\u7528\u6cd5\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:published_time\" content=\"2023-06-09T06:38:16+00:00\" 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