{"id":122934,"date":"2024-03-24T09:06:49","date_gmt":"2024-03-24T00:06:49","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/%e3%82%bf%e3%82%b9%e3%82%af%e3%81%ae%e5%88%86%e9%85%8d%e3%81%a8%e8%b2%a0%e8%8d%b7%e3%81%ae%e5%88%86%e6%95%a3%e3%81%ab%e3%81%8a%e3%81%91%e3%82%8bgo-waitgroup%e3%81%ae%e6%b4%bb%e7%94%a8\/"},"modified":"2024-03-28T09:41:32","modified_gmt":"2024-03-28T00:41:32","slug":"%e3%82%bf%e3%82%b9%e3%82%af%e3%81%ae%e5%88%86%e9%85%8d%e3%81%a8%e8%b2%a0%e8%8d%b7%e3%81%ae%e5%88%86%e6%95%a3%e3%81%ab%e3%81%8a%e3%81%91%e3%82%8bgo-waitgroup%e3%81%ae%e6%b4%bb%e7%94%a8","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/%e3%82%bf%e3%82%b9%e3%82%af%e3%81%ae%e5%88%86%e9%85%8d%e3%81%a8%e8%b2%a0%e8%8d%b7%e3%81%ae%e5%88%86%e6%95%a3%e3%81%ab%e3%81%8a%e3%81%91%e3%82%8bgo-waitgroup%e3%81%ae%e6%b4%bb%e7%94%a8\/","title":{"rendered":"\u30bf\u30b9\u30af\u306e\u5206\u914d\u3068\u8ca0\u8377\u306e\u5206\u6563\u306b\u304a\u3051\u308bGo WaitGroup\u306e\u6d3b\u7528"},"content":{"rendered":"<p>Go\u8a00\u8a9e\u3067\u306f\u3001WaitGroup\u306f\u4e00\u9023\u306egoroutine\u306e\u5b9f\u884c\u3092\u5f85\u6a5f\u3059\u308b\u305f\u3081\u306e\u6a5f\u80fd\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002\u8907\u6570\u306e\u4e26\u5217\u30bf\u30b9\u30af\u306e\u5b9f\u884c\u3068\u5f85\u6a5f\u3092\u8abf\u6574\u3057\u3001\u3059\u3079\u3066\u306e\u30bf\u30b9\u30af\u304c\u5b8c\u4e86\u3057\u305f\u3053\u3068\u3092\u78ba\u8a8d\u3057\u3066\u304b\u3089\u30e1\u30a4\u30f3\u30b9\u30ec\u30c3\u30c9\u306e\u5b9f\u884c\u3092\u7d9a\u884c\u3057\u307e\u3059\u3002<\/p>\n<p>WaitGroup\u306e\u4f7f\u3044\u65b9\u306b\u95a2\u3059\u308b\u7c21\u5358\u306a\u4f8b\u3092\u6b21\u306b\u793a\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">package<\/span> main\r\n<span class=\"hljs-keyword\">import<\/span> (\r\n<span class=\"hljs-string\">\"fmt\"<\/span>\r\n<span class=\"hljs-string\">\"sync\"<\/span>\r\n<span class=\"hljs-string\">\"time\"<\/span>\r\n)\r\n<span class=\"hljs-function\"><span class=\"hljs-keyword\">func<\/span> <span class=\"hljs-title\">worker<\/span><span class=\"hljs-params\">(id <span class=\"hljs-type\">int<\/span>, wg *sync.WaitGroup)<\/span><\/span> {\r\n<span class=\"hljs-keyword\">defer<\/span> wg.Done()\r\nfmt.Printf(<span class=\"hljs-string\">\"Worker %d starting\\n\"<\/span>, id)\r\ntime.Sleep(time.Second)\r\nfmt.Printf(<span class=\"hljs-string\">\"Worker %d done\\n\"<\/span>, id)\r\n}\r\n<span class=\"hljs-function\"><span class=\"hljs-keyword\">func<\/span> <span class=\"hljs-title\">main<\/span><span class=\"hljs-params\">()<\/span><\/span> {\r\n<span class=\"hljs-keyword\">var<\/span> wg sync.WaitGroup\r\n<span class=\"hljs-keyword\">for<\/span> i := <span class=\"hljs-number\">1<\/span>; i &lt;= <span class=\"hljs-number\">5<\/span>; i++ {\r\nwg.Add(<span class=\"hljs-number\">1<\/span>)\r\n<span class=\"hljs-keyword\">go<\/span> worker(i, &amp;wg)\r\n}\r\nwg.Wait()\r\nfmt.Println(<span class=\"hljs-string\">\"All workers done\"<\/span>)\r\n}\r\n<\/code><\/pre>\n<p>\u3053\u306e\u4f8b\u3067\u306f `worker` \u95a2\u6570\u3092\u5b9a\u7fa9\u3057\u3066\u3044\u3066\u3001`id` \u3068 `WaitGroup` \u5f15\u6570\u3092\u53d7\u3051\u53d6\u308a\u307e\u3059\u3002\u95a2\u6570\u304c\u958b\u59cb\u3059\u308b\u3068\u3001`wg.Done()` \u3092\u547c\u3073\u51fa\u3057\u3066\u3001\u30bf\u30b9\u30af\u306e\u5b8c\u4e86\u3092 `WaitGroup` \u306b\u901a\u77e5\u3057\u307e\u3059\u3002\u30e1\u30a4\u30f3\u95a2\u6570\u3067\u306f\u30015 \u3064\u306e `worker` \u30b4\u30eb\u30fc\u30c1\u30f3\u3092\u4f5c\u6210\u3059\u308b\u30eb\u30fc\u30d7\u3092\u5b9f\u884c\u3057\u3001\u5404\u30b4\u30eb\u30fc\u30c1\u30f3\u3092\u958b\u59cb\u3059\u308b\u524d\u306b `wg.Add(1)` \u3092\u547c\u3073\u51fa\u3057\u3066 `WaitGroup` \u306e\u30ab\u30a6\u30f3\u30c8\u3092\u5897\u3084\u3057\u307e\u3059\u3002\u6700\u5f8c\u306b\u3001`wg.Wait()` \u3092\u547c\u3073\u51fa\u3057\u3066\u3001\u3059\u3079\u3066\u306e\u30b4\u30eb\u30fc\u30c1\u30f3\u306e\u5b9f\u884c\u304c\u5b8c\u4e86\u3059\u308b\u306e\u3092\u5f85\u3061\u307e\u3059\u3002<\/p>\n<p>\u51fa\u529b\u7d50\u679c\u306f\u6b21\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code>Worker 1 starting\r\nWorker 5 starting\r\nWorker 2 starting\r\nWorker 3 starting\r\nWorker 4 starting\r\nWorker 4 done\r\nWorker 1 done\r\nWorker 2 done\r\nWorker 3 done\r\nWorker 5 done\r\nAll workers done\r\n<\/code><\/pre>\n<p>WaitGroup\u306e\u30ab\u30a6\u30f3\u30bf\u304c\u8ca0\u306e\u6570\u5024\u306b\u306a\u3089\u306a\u3044\u3088\u3046\u306b\u6ce8\u610f\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u3001\u5404\u30b4\u30ea\u30eb\u30fc\u30c1\u30f3\u3067wg.Add(1)\u304c\u5b9f\u884c\u3055\u308c\u308b\u307e\u3067wg.Done()\u3092\u547c\u3073\u51fa\u3059\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>WaitGroup \u306b\u306f wg.Add(delta int) \u3068\u3044\u3046\u3088\u304f\u4f7f\u308f\u308c\u308b\u30e1\u30bd\u30c3\u30c9\u304c\u3042\u308a\u3001\u30ab\u30a6\u30f3\u30bf\u306e\u5024\u3092\u4e00\u62ec\u3057\u3066\u5897\u6e1b\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3053\u308c\u306f\u3001\u30bf\u30b9\u30af\u306e\u5206\u6563\u3068\u8ca0\u8377\u306e\u5206\u6563\u306b\u3082\u975e\u5e38\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002<\/p>\n<p>\u4f8b\u3048\u3070\u3001\u30bf\u30b9\u30af\u306e\u30ea\u30b9\u30c8\u304c\u3042\u308a\u3001\u30bf\u30b9\u30af\u3092 goroutine \u306e\u30b0\u30eb\u30fc\u30d7\u306b\u5272\u308a\u5f53\u3066\u3066\u4e26\u5217\u51e6\u7406\u3057\u305f\u3044\u5834\u5408\u306f\u3001WaitGroup\u3092\u4f7f\u7528\u3057\u3066\u3059\u3079\u3066\u306e\u30bf\u30b9\u30af\u304c\u5b8c\u4e86\u3059\u308b\u306e\u3092\u5f85\u6a5f\u3067\u304d\u307e\u3059\u3002\u30bf\u30b9\u30af\u3092\u5272\u308a\u5f53\u3066\u308b\u3068\u304d\u306f\u3001wg.Add(len(tasks))\u3092\u4f7f\u7528\u3057\u3066WaitGroup\u306e\u30ab\u30a6\u30f3\u30bf\u3092\u4e00\u62ec\u3067\u5897\u3084\u3057\u3001\u5404goroutine\u304c\u30bf\u30b9\u30af\u3092\u5b8c\u4e86\u3059\u308b\u3068wg.Done()\u3092\u547c\u3073\u51fa\u3057\u3066\u30ab\u30a6\u30f3\u30bf\u3092\u6e1b\u3089\u3057\u307e\u3059\u3002<\/p>\n<p>Go\u8a00\u8a9e\u306eWaitGroup\u306f\u3001\u4e26\u5217\u306b\u5b9f\u884c\u3057\u305f\u8907\u6570\u306e\u30bf\u30b9\u30af\u306e\u5b9f\u884c\u5f85\u3061\u3092\u8abf\u6574\u3059\u308b\u975e\u5e38\u306b\u4fbf\u5229\u306a\u6a5f\u80fd\u3067\u3059\u3002WaitGroup\u3092\u9069\u5207\u306b\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30bf\u30b9\u30af\u306e\u632f\u308a\u5206\u3051\u3068\u8ca0\u8377\u5206\u6563\u3092\u5b9f\u73fe\u3057\u3001\u4e26\u5217\u51e6\u7406\u306e\u6027\u80fd\u3068\u52b9\u7387\u3092\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Go\u8a00\u8a9e\u3067\u306f\u3001WaitGroup\u306f\u4e00\u9023\u306egoroutine\u306e\u5b9f\u884c\u3092\u5f85\u6a5f\u3059\u308b\u305f\u3081\u306e\u6a5f\u80fd\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002\u8907\u6570\u306e\u4e26\u5217\u30bf\u30b9\u30af\u306e\u5b9f\u884c\u3068\u5f85\u6a5f\u3092\u8abf\u6574\u3057\u3001\u3059\u3079\u3066\u306e\u30bf\u30b9\u30af\u304c\u5b8c\u4e86\u3057\u305f\u3053\u3068\u3092\u78ba\u8a8d\u3057\u3066\u304b\u3089\u30e1\u30a4\u30f3\u30b9\u30ec\u30c3\u30c9\u306e\u5b9f\u884c\u3092\u7d9a\u884c\u3057\u307e\u3059\u3002 Wai [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-122934","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>\u30bf\u30b9\u30af\u306e\u5206\u914d\u3068\u8ca0\u8377\u306e\u5206\u6563\u306b\u304a\u3051\u308bGo WaitGroup\u306e\u6d3b\u7528 - 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\/ja\/blog\/\u30bf\u30b9\u30af\u306e\u5206\u914d\u3068\u8ca0\u8377\u306e\u5206\u6563\u306b\u304a\u3051\u308bgo-waitgroup\u306e\u6d3b\u7528\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u30bf\u30b9\u30af\u306e\u5206\u914d\u3068\u8ca0\u8377\u306e\u5206\u6563\u306b\u304a\u3051\u308bGo WaitGroup\u306e\u6d3b\u7528\" \/>\n<meta property=\"og:description\" content=\"Go\u8a00\u8a9e\u3067\u306f\u3001WaitGroup\u306f\u4e00\u9023\u306egoroutine\u306e\u5b9f\u884c\u3092\u5f85\u6a5f\u3059\u308b\u305f\u3081\u306e\u6a5f\u80fd\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002\u8907\u6570\u306e\u4e26\u5217\u30bf\u30b9\u30af\u306e\u5b9f\u884c\u3068\u5f85\u6a5f\u3092\u8abf\u6574\u3057\u3001\u3059\u3079\u3066\u306e\u30bf\u30b9\u30af\u304c\u5b8c\u4e86\u3057\u305f\u3053\u3068\u3092\u78ba\u8a8d\u3057\u3066\u304b\u3089\u30e1\u30a4\u30f3\u30b9\u30ec\u30c3\u30c9\u306e\u5b9f\u884c\u3092\u7d9a\u884c\u3057\u307e\u3059\u3002 Wai [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/ja\/blog\/\u30bf\u30b9\u30af\u306e\u5206\u914d\u3068\u8ca0\u8377\u306e\u5206\u6563\u306b\u304a\u3051\u308bgo-waitgroup\u306e\u6d3b\u7528\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:published_time\" content=\"2024-03-24T00:06:49+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-03-28T00:41:32+00:00\" \/>\n<meta name=\"author\" content=\"\u7dbe\u4e43, \u4e00\u5e0c\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u57f7\u7b46\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"\u7dbe\u4e43, \u4e00\u5e0c\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u63a8\u5b9a\u8aad\u307f\u53d6\u308a\u6642\u9593\" \/>\n\t<meta name=\"twitter:data2\" content=\"1\u5206\" \/>\n<script type=\"application\/ld+json\" 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