{"id":206931,"date":"2025-06-12T08:39:29","date_gmt":"2025-06-12T00:39:29","guid":{"rendered":"https:\/\/server.hk\/cnblog\/206931\/"},"modified":"2025-06-12T08:39:29","modified_gmt":"2025-06-12T00:39:29","slug":"go%ef%bc%9a%e7%bc%ba%e4%b9%8f%e5%90%8c%e6%ad%a5","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/206931\/","title":{"rendered":"GO\uff1a\u7f3a\u4e4f\u540c\u6b65"},"content":{"rendered":"<p>\u672c\u7bc7\u6587\u7ae0\u4e3b\u8981\u662f\u7ed3\u5408\u6211\u4e4b\u524d\u9762\u8bd5\u7684\u5404\u79cd\u7ecf\u5386\u548c\u5b9e\u6218\u5f00\u53d1\u4e2d\u9047\u5230\u7684\u95ee\u9898\u89e3\u51b3\u7ecf\u9a8c\u6574\u7406\u7684\uff0c\u5e0c\u671b\u8fd9\u7bc7\u300aGO\uff1a\u7f3a\u4e4f\u540c\u6b65\u300b\u5bf9\u4f60\u6709\u5f88\u5927\u5e2e\u52a9\uff01\u6b22\u8fce\u6536\u85cf\uff0c\u5206\u4eab\u7ed9\u66f4\u591a\u7684\u9700\u8981\u7684\u670b\u53cb\u5b66\u4e60~,<br \/>\n<img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241129\/173287802567499ec9c493e.jpg\" class=\"aligncenter\">,<br \/>\n<strong>\u53d8\u91cf\uff1a<\/strong>,<br \/>\n<strong>\u529f\u80fd\uff1a<\/strong>,<br \/>\n<strong>main() \u4e2d\u7684\u5e76\u53d1\uff1a<\/strong>,<br \/>\n<strong>\u6f5c\u5728\u95ee\u9898\uff1a<\/strong>,<br \/>\n<strong>\u53ef\u80fd\u7684\u7ed3\u679c<\/strong><br \/>\n<br \/> \u7531\u4e8e\u7f3a\u4e4f\u540c\u6b65\uff0c\u7a0b\u5e8f\u7684\u8f93\u51fa\u662f\u4e0d\u786e\u5b9a\u7684\u3002\u4ee5\u4e0b\u662f\u53ef\u80fd\u7684\u60c5\u51b5\uff1a,<br \/>\n<em><strong>\u60c5\u51b5 1<\/strong>\uff1ag() \u5728 f() \u4fee\u6539 a \u548c b \u4e4b\u524d\u6267\u884c\uff1a<\/em>,\u6216,<br \/>\n<em><strong>\u60c5\u51b5 2<\/strong>\uff1a\u5982\u679c b = 2 \u5728 g() \u4e4b\u524d\u5b8c\u6210\uff0c\u4f46 a = 1 \u672a\u5b8c\u6210\uff0c\u5219\u8f93\u51fa\u53ef\u80fd\u4e3a\uff1a<\/em><br \/>\n<br \/>,<br \/>\n<strong>\u4e3b\u8981\u89c2\u5bdf\u7ed3\u679c<\/strong><br \/>\n<br \/> \u6570\u636e\u7ade\u4e89\uff1a\u5728\u4e0d\u540c\u6b65\u7684\u60c5\u51b5\u4e0b\u5bf9 a \u548c b \u8fdb\u884c\u5e76\u53d1\u8bbf\u95ee\u4f1a\u5f15\u5165\u6570\u636e\u7ade\u4e89\u3002\u8fd9\u4f7f\u5f97\u7a0b\u5e8f\u7684\u884c\u4e3a\u53d8\u5f97\u4e0d\u786e\u5b9a\u4e14\u4e0d\u53ef\u9884\u6d4b,<br \/>\n<strong>\u4fee\u590d\u4ee3\u7801<\/strong>,\u8fd9\u91cc\uff0cg() \u7b49\u5f85\uff0c\u76f4\u5230 f() \u901a\u8fc7\u5b8c\u6210\u7684\u901a\u9053\u53d1\u9001\u4fe1\u53f7\u3002,\u4eca\u5929\u5173\u4e8e\u300aGO\uff1a\u7f3a\u4e4f\u540c\u6b65\u300b\u7684\u5185\u5bb9\u5c31\u4ecb\u7ecd\u5230\u8fd9\u91cc\u4e86\uff0c\u662f\u4e0d\u662f\u5b66\u8d77\u6765\u4e00\u76ee\u4e86\u7136\uff01\u60f3\u8981\u4e86\u89e3\u66f4\u591a\u5173\u4e8e\u7684\u5185\u5bb9\u8bf7\u5173\u6ce8GOLANG\u516c\u4f17\u53f7\uff01,\u8bfb\u53d6\u5e76\u6253\u5370 b\uff0c\u7136\u540e\u6253\u5370 a\u3002,g():,f()\uff1a <\/p>\n<ul>\n<li>\u987a\u5e8f\u5199\u5165 a \u548c b\uff08a = 1 \u4e14 b = 2\uff09\u3002<\/li>\n<\/ul>\n<p>,a \u548c b \u662f int \u7c7b\u578b\u7684\u5168\u5c40\u53d8\u91cf\uff0c\u4e3a\u6240\u6709 goroutine \u5171\u4eab\u3002,\u53d8\u91cf\uff1a,\u672c\u7bc7\u6587\u7ae0\u4e3b\u8981\u662f\u7ed3\u5408\u6211\u4e4b\u524d\u9762\u8bd5\u7684\u5404\u79cd\u7ecf\u5386\u548c\u5b9e\u6218\u5f00\u53d1\u4e2d\u9047\u5230\u7684\u95ee\u9898\u89e3\u51b3\u7ecf\u9a8c\u6574\u7406\u7684\uff0c\u5e0c\u671b\u8fd9\u7bc7\u300aGO\uff1a\u7f3a\u4e4f\u540c\u6b65\u300b\u5bf9\u4f60\u6709\u5f88\u5927\u5e2e\u52a9\uff01\u6b22\u8fce\u6536\u85cf\uff0c\u5206\u4eab\u7ed9\u66f4\u591a\u7684\u9700\u8981\u7684\u670b\u53cb\u5b66\u4e60~,<br \/>\n<b><\/b> <\/p>\n<p>\u5f53\u524d\u4f4d\u7f6e\uff1a <span>&gt;<\/span>  <span>&gt;<\/span>  <span>&gt;<\/span>  <span>&gt;<\/span> <span>GO\uff1a\u7f3a\u4e4f\u540c\u6b65<\/span><\/p>\n<h1>GO\uff1a\u7f3a\u4e4f\u540c\u6b65<\/h1>\n<p><span>\u6765\u6e90\uff1adev.to<\/span><br \/>\n<span>2024-11-29 19:00:41<\/span><br \/>\n<span><i><\/i>0\u6d4f\u89c8<\/span><br \/>\n<span style=\"cursor: pointer\"><i><\/i>\u6536\u85cf<\/span> <\/p>\n<p>\u672c\u7bc7\u6587\u7ae0\u4e3b\u8981\u662f\u7ed3\u5408\u6211\u4e4b\u524d\u9762\u8bd5\u7684\u5404\u79cd\u7ecf\u5386\u548c\u5b9e\u6218\u5f00\u53d1\u4e2d\u9047\u5230\u7684\u95ee\u9898\u89e3\u51b3\u7ecf\u9a8c\u6574\u7406\u7684\uff0c\u5e0c\u671b\u8fd9\u7bc7\u300aGO\uff1a\u7f3a\u4e4f\u540c\u6b65\u300b\u5bf9\u4f60\u6709\u5f88\u5927\u5e2e\u52a9\uff01\u6b22\u8fce\u6536\u85cf\uff0c\u5206\u4eab\u7ed9\u66f4\u591a\u7684\u9700\u8981\u7684\u670b\u53cb\u5b66\u4e60~<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241129\/173287802567499ec9c493e.jpg\" class=\"aligncenter\"><\/p>\n<pre>var a string\nvar done bool\n\nfunc setup() {\n    a = \"hello, world\"\n    done = true\n}\n\nfunc doprint() {\n    if !done {\n        once.do(setup)\n    }\n    print(a)\n}\n\nfunc twoprint() {\n    go doprint()\n    go doprint()\n}\n<\/pre>\n<h2> \u4ee3\u7801\u5206\u6790 <\/h2>\n<p><strong>\u53d8\u91cf\uff1a<\/strong><\/p>\n<ul>\n<li>a \u548c b \u662f int \u7c7b\u578b\u7684\u5168\u5c40\u53d8\u91cf\uff0c\u4e3a\u6240\u6709 goroutine \u5171\u4eab\u3002<\/li>\n<\/ul>\n<p><strong>\u529f\u80fd\uff1a<\/strong><\/p>\n<ul>\n<li>f()\uff1a\n<ul>\n<li>\u987a\u5e8f\u5199\u5165 a \u548c b\uff08a = 1 \u4e14 b = 2\uff09\u3002<\/li>\n<\/ul>\n<\/li>\n<li>g():<\/li>\n<li>\u8bfb\u53d6\u5e76\u6253\u5370 b\uff0c\u7136\u540e\u6253\u5370 a\u3002<\/li>\n<\/ul>\n<p><strong>main() \u4e2d\u7684\u5e76\u53d1\uff1a<\/strong><\/p>\n<ul>\n<li>\u51fd\u6570 f() \u4f7f\u7528 go f() \u4f5c\u4e3a\u5355\u72ec\u7684 goroutine \u6267\u884c\u3002<\/li>\n<li>\u51fd\u6570 g() \u76f4\u63a5\u5728\u4e3b goroutine \u4e2d\u6267\u884c\u3002<\/li>\n<\/ul>\n<p><strong>\u6f5c\u5728\u95ee\u9898\uff1a<\/strong><\/p>\n<ul>\n<li>\u8fd0\u884c f() \u7684 goroutine \u548c\u6267\u884c g() \u7684\u4e3b goroutine \u5e76\u53d1\u8fd0\u884c\u3002<\/li>\n<li>\u5728 g() \u8bfb\u53d6\u5e76\u6253\u5370 a \u548c b \u7684\u503c\u4e4b\u524d\uff0cf() \u4e2d\u5bf9 a \u548c b \u7684\u5199\u5165\u53ef\u80fd\u65e0\u6cd5\u5b8c\u6210\u3002<\/li>\n<li>\u8fd9\u5f15\u5165\u4e86\u6570\u636e\u7ade\u4e89\uff0c\u5176\u4e2d\u5e76\u53d1\u8bbf\u95ee\uff08\u5728 f() \u4e2d\u5199\u5165\u5e76\u5728 g() \u4e2d\u8bfb\u53d6\uff09\u53d1\u751f\u5728\u5171\u4eab\u5185\u5b58\uff08a \u548c b\uff09\u4e0a\uff0c\u800c\u65e0\u9700\u540c\u6b65\u3002<\/li>\n<\/ul>\n<p><strong>\u53ef\u80fd\u7684\u7ed3\u679c<\/strong><br \/> \u7531\u4e8e\u7f3a\u4e4f\u540c\u6b65\uff0c\u7a0b\u5e8f\u7684\u8f93\u51fa\u662f\u4e0d\u786e\u5b9a\u7684\u3002\u4ee5\u4e0b\u662f\u53ef\u80fd\u7684\u60c5\u51b5\uff1a<\/p>\n<p><em><strong>\u60c5\u51b5 1<\/strong>\uff1ag() \u5728 f() \u4fee\u6539 a \u548c b \u4e4b\u524d\u6267\u884c\uff1a<\/em><\/p>\n<ul>\n<li>a \u548c b \u7684\u521d\u59cb\u503c\u4e3a 0\uff08go \u4e2d\u672a\u521d\u59cb\u5316 int \u7684\u9ed8\u8ba4\u503c\uff09\u3002 <\/li>\n<\/ul>\n<pre>0\n0\n\n<\/pre>\n<p>\u6216<\/p>\n<p><em><strong>\u60c5\u51b5 2<\/strong>\uff1a\u5982\u679c b = 2 \u5728 g() \u4e4b\u524d\u5b8c\u6210\uff0c\u4f46 a = 1 \u672a\u5b8c\u6210\uff0c\u5219\u8f93\u51fa\u53ef\u80fd\u4e3a\uff1a<\/em><\/p>\n<pre>2\n0\n<\/pre>\n<p><strong>\u4e3b\u8981\u89c2\u5bdf\u7ed3\u679c<\/strong><br \/> \u6570\u636e\u7ade\u4e89\uff1a\u5728\u4e0d\u540c\u6b65\u7684\u60c5\u51b5\u4e0b\u5bf9 a \u548c b \u8fdb\u884c\u5e76\u53d1\u8bbf\u95ee\u4f1a\u5f15\u5165\u6570\u636e\u7ade\u4e89\u3002\u8fd9\u4f7f\u5f97\u7a0b\u5e8f\u7684\u884c\u4e3a\u53d8\u5f97\u4e0d\u786e\u5b9a\u4e14\u4e0d\u53ef\u9884\u6d4b<\/p>\n<p><strong>\u4fee\u590d\u4ee3\u7801<\/strong><\/p>\n<ol>\n<li>\u4f7f\u7528sync.waitgroup\uff1a \u786e\u4fdd f() \u5728 g() \u6267\u884c\u4e4b\u524d\u5b8c\u6210 <\/li>\n<\/ol>\n<pre>var a, b int\nvar wg sync.waitgroup\n\nfunc f() {\n    a = 1\n    b = 2\n    wg.done()\n}\n\nfunc g() {\n    print(b)\n    print(a)\n}\n\nfunc main() {\n    wg.add(1)\n    go f()\n    wg.wait()\n    g()\n}\n\n<\/pre>\n<ol>\n<li>\u4f7f\u7528<strong>\u9891\u9053\uff1a<\/strong> \u5f53 f() \u5b8c\u6210\u65f6\u53d1\u51fa\u4fe1\u53f7\uff1a <\/li>\n<\/ol>\n<pre>var a, b int\n\nfunc f(done chan bool) {\n    a = 1\n    b = 2\n    done &lt;- true\n}\n\nfunc g() {\n    print(b)\n    print(a)\n}\n\nfunc main() {\n    done := make(chan bool)\n    go f(done)\n    &lt;-done\n    g()\n}\n\n<\/pre>\n<p>\u8fd9\u91cc\uff0cg() \u7b49\u5f85\uff0c\u76f4\u5230 f() \u901a\u8fc7\u5b8c\u6210\u7684\u901a\u9053\u53d1\u9001\u4fe1\u53f7\u3002<\/p>\n<p>\u4eca\u5929\u5173\u4e8e\u300aGO\uff1a\u7f3a\u4e4f\u540c\u6b65\u300b\u7684\u5185\u5bb9\u5c31\u4ecb\u7ecd\u5230\u8fd9\u91cc\u4e86\uff0c\u662f\u4e0d\u662f\u5b66\u8d77\u6765\u4e00\u76ee\u4e86\u7136\uff01\u60f3\u8981\u4e86\u89e3\u66f4\u591a\u5173\u4e8e\u7684\u5185\u5bb9\u8bf7\u5173\u6ce8GOLANG\u516c\u4f17\u53f7\uff01<\/p>\n<p> \u7248\u672c\u58f0\u660e \u672c\u6587\u8f6c\u8f7d\u4e8e\uff1adev.to \u5982\u6709\u4fb5\u72af\uff0c\u8bf7\u8054\u7cfb \u5220\u9664  <\/p>\n<dl>\n<dt>\n <\/dt>\n<dd>\n   \u89e3\u51b3\u7535\u8111\u5f00\u673a\u4e0d\u65ad\u91cd\u542f\u7684\u7ec8\u6781\u6307\u5357\n <\/dd>\n<\/dl>\n<dl>\n<dt>\n <\/dt>\n<dd>\n   \u5982\u4f55\u5c06getgfs\u5e93\u7684\u7c7b\u578b\u6570\u636e\u8f6c\u6362\u4e3a\u5b57\u5178\u683c\u5f0f\uff1f\n <\/dd>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"<p>\u672c\u7bc7\u6587\u7ae0\u4e3b\u8981\u662f\u7ed3\u5408\u6211\u4e4b\u524d\u9762\u8bd5\u7684\u5404&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-206931","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/206931","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=206931"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/206931\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=206931"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=206931"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=206931"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}