{"id":57614,"date":"2024-10-10T19:43:16","date_gmt":"2024-10-10T11:43:16","guid":{"rendered":"https:\/\/server.hk\/cnblog\/57614\/"},"modified":"2024-10-10T19:43:16","modified_gmt":"2024-10-10T11:43:16","slug":"go%e6%95%99%e7%a8%8b-go-%e8%aa%9e%e8%a8%80-sync-%e5%8c%85%e8%88%87%e9%8e%96%ef%bc%9a%e9%99%90%e5%88%b6%e7%b7%9a%e7%a8%8b%e5%b0%8d%e8%ae%8a%e9%87%8f%e7%9a%84%e8%a8%aa%e5%95%8f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/57614\/","title":{"rendered":"GO\u6559\u7a0b: Go \u8a9e\u8a00 sync \u5305\u8207\u9396\uff1a\u9650\u5236\u7dda\u7a0b\u5c0d\u8b8a\u91cf\u7684\u8a2a\u554f"},"content":{"rendered":"<h1 id=\"go%e6%95%99%e7%a8%8b-go-%e8%aa%9e%e8%a8%80-sync-%e5%8c%85%e8%88%87%e9%8e%96%ef%bc%9a%e9%99%90%e5%88%b6%e7%b7%9a%e7%a8%8b%e5%b0%8d%e8%ae%8a%e9%87%8f%e7%9a%84%e8%a8%aa%e5%95%8f-jShUvbKTNV\">GO\u6559\u7a0b: Go \u8a9e\u8a00 sync \u5305\u8207\u9396\uff1a\u9650\u5236\u7dda\u7a0b\u5c0d\u8b8a\u91cf\u7684\u8a2a\u554f<\/h1>\n<p>\u5728\u591a\u7dda\u7a0b\u7de8\u7a0b\u4e2d\uff0c\u78ba\u4fdd\u6578\u64da\u7684\u4e00\u81f4\u6027\u548c\u6b63\u78ba\u6027\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002Go \u8a9e\u8a00\u63d0\u4f9b\u4e86\u4e00\u500b\u540d\u70ba <code>sync<\/code> \u7684\u5305\uff0c\u5c08\u9580\u7528\u65bc\u8655\u7406\u4e26\u767c\u7de8\u7a0b\u4e2d\u7684\u540c\u6b65\u554f\u984c\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e <code>sync<\/code> \u5305\u4e2d\u7684\u9396\u6a5f\u5236\uff0c\u4e26\u4ecb\u7d39\u5982\u4f55\u4f7f\u7528\u9019\u4e9b\u9396\u4f86\u9650\u5236\u7dda\u7a0b\u5c0d\u8b8a\u91cf\u7684\u8a2a\u554f\u3002<\/p>\n<h2 id=\"%e7%82%ba%e4%bb%80%e9%ba%bc%e9%9c%80%e8%a6%81%e9%8e%96%ef%bc%9f-jShUvbKTNV\">\u70ba\u4ec0\u9ebc\u9700\u8981\u9396\uff1f<\/h2>\n<p>\u5728\u591a\u7dda\u7a0b\u74b0\u5883\u4e2d\uff0c\u7576\u591a\u500b\u7dda\u7a0b\u540c\u6642\u8a2a\u554f\u548c\u4fee\u6539\u5171\u4eab\u8b8a\u91cf\u6642\uff0c\u53ef\u80fd\u6703\u5c0e\u81f4\u6578\u64da\u7af6\u722d\uff08data race\uff09\u3002\u6578\u64da\u7af6\u722d\u6703\u5c0e\u81f4\u4e0d\u53ef\u9810\u6e2c\u7684\u884c\u70ba\uff0c\u751a\u81f3\u53ef\u80fd\u4f7f\u7a0b\u5e8f\u5d29\u6f70\u3002\u56e0\u6b64\uff0c\u4f7f\u7528\u9396\u4f86\u4fdd\u8b77\u5171\u4eab\u8cc7\u6e90\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002<\/p>\n<h2 id=\"go-%e8%aa%9e%e8%a8%80%e4%b8%ad%e7%9a%84%e9%8e%96-jShUvbKTNV\">Go \u8a9e\u8a00\u4e2d\u7684\u9396<\/h2>\n<p>Go \u8a9e\u8a00\u7684 <code>sync<\/code> \u5305\u63d0\u4f9b\u4e86\u5e7e\u7a2e\u4e0d\u540c\u7684\u9396\u6a5f\u5236\uff0c\u5176\u4e2d\u6700\u5e38\u7528\u7684\u662f <code id=\"mutex-jShUvbKTNV\">Mutex<\/code> \u548c <code id=\"rwmutex-jShUvbKTNV\">RWMutex<\/code>\u3002<\/p>\n<h3 id=\"mutex-jShUvbKTNV\">Mutex<\/h3>\n<p><code id=\"mutex-jShUvbKTNV\">Mutex<\/code> \u662f\u4e00\u7a2e\u4e92\u65a5\u9396\uff0c\u78ba\u4fdd\u5728\u540c\u4e00\u6642\u9593\u53ea\u6709\u4e00\u500b\u7dda\u7a0b\u53ef\u4ee5\u8a2a\u554f\u5171\u4eab\u8cc7\u6e90\u3002\u4f7f\u7528 <code id=\"mutex-jShUvbKTNV\">Mutex<\/code> \u7684\u57fa\u672c\u6b65\u9a5f\u5982\u4e0b\uff1a<\/p>\n<pre><code>package main\n\nimport (\n    \"fmt\"\n    \"sync\"\n)\n\nvar (\n    counter int\n    mu      sync.Mutex\n)\n\nfunc increment(wg *sync.WaitGroup) {\n    defer wg.Done()\n    mu.Lock()         \/\/ \u7372\u53d6\u9396\n    counter++         \/\/ \u4fee\u6539\u5171\u4eab\u8b8a\u91cf\n    mu.Unlock()       \/\/ \u91cb\u653e\u9396\n}\n\nfunc main() {\n    var wg sync.WaitGroup\n    for i := 0; i &lt; 1000; i++ {\n        wg.Add(1)\n        go increment(&amp;wg)\n    }\n    wg.Wait()\n    fmt.Println(&quot;\u6700\u7d42\u8a08\u6578\u5668\u503c:&quot;, counter)\n}\n<\/code><\/pre>\n<p>\u5728\u4e0a\u9762\u7684\u4f8b\u5b50\u4e2d\uff0c\u6211\u5011\u5b9a\u7fa9\u4e86\u4e00\u500b\u5168\u5c40\u8b8a\u91cf <code>counter<\/code>\uff0c\u4e26\u4f7f\u7528 <code id=\"mutex-jShUvbKTNV\">Mutex<\/code> \u4f86\u4fdd\u8b77\u5c0d\u8a72\u8b8a\u91cf\u7684\u8a2a\u554f\u3002\u6bcf\u7576\u4e00\u500b\u7dda\u7a0b\u60f3\u8981\u4fee\u6539 <code>counter<\/code> \u6642\uff0c\u5b83\u5fc5\u9808\u5148\u7372\u53d6\u9396\uff0c\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u5728\u4efb\u4f55\u6642\u5019\u53ea\u6709\u4e00\u500b\u7dda\u7a0b\u53ef\u4ee5\u8a2a\u554f\u8a72\u8b8a\u91cf\u3002<\/p>\n<h3 id=\"rwmutex-jShUvbKTNV\">RWMutex<\/h3>\n<p><code id=\"rwmutex-jShUvbKTNV\">RWMutex<\/code> \u662f\u4e00\u7a2e\u8b80\u5beb\u9396\uff0c\u5141\u8a31\u591a\u500b\u8b80\u8005\u540c\u6642\u8a2a\u554f\u5171\u4eab\u8cc7\u6e90\uff0c\u4f46\u5728\u5beb\u8005\u8a2a\u554f\u6642\u6703\u963b\u6b62\u6240\u6709\u8b80\u8005\u548c\u5176\u4ed6\u5beb\u8005\u3002\u9019\u5728\u8b80\u53d6\u64cd\u4f5c\u9060\u591a\u65bc\u5beb\u5165\u64cd\u4f5c\u7684\u60c5\u6cc1\u4e0b\u7279\u5225\u6709\u7528\u3002<\/p>\n<pre><code>package main\n\nimport (\n    \"fmt\"\n    \"sync\"\n)\n\nvar (\n    data  int\n    rwMu  sync.RWMutex\n)\n\nfunc read(wg *sync.WaitGroup) {\n    defer wg.Done()\n    rwMu.RLock()      \/\/ \u7372\u53d6\u8b80\u9396\n    fmt.Println(\"\u8b80\u53d6\u6578\u64da:\", data)\n    rwMu.RUnlock()    \/\/ \u91cb\u653e\u8b80\u9396\n}\n\nfunc write(wg *sync.WaitGroup) {\n    defer wg.Done()\n    rwMu.Lock()       \/\/ \u7372\u53d6\u5beb\u9396\n    data++            \/\/ \u4fee\u6539\u5171\u4eab\u8b8a\u91cf\n    rwMu.Unlock()     \/\/ \u91cb\u653e\u5beb\u9396\n}\n\nfunc main() {\n    var wg sync.WaitGroup\n    for i := 0; i &lt; 10; i++ {\n        wg.Add(1)\n        go read(&amp;wg)\n    }\n    for i := 0; i &lt; 5; i++ {\n        wg.Add(1)\n        go write(&amp;wg)\n    }\n    wg.Wait()\n}\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u6211\u5011\u4f7f\u7528 <code id=\"rwmutex-jShUvbKTNV\">RWMutex<\/code> \u4f86\u4fdd\u8b77\u5c0d <code>data<\/code> \u7684\u8a2a\u554f\u3002\u591a\u500b\u8b80\u8005\u53ef\u4ee5\u540c\u6642\u8b80\u53d6\u6578\u64da\uff0c\u4f46\u5728\u5beb\u5165\u6642\uff0c\u6240\u6709\u8b80\u8005\u90fd\u6703\u88ab\u963b\u6b62\uff0c\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u6578\u64da\u7684\u4e00\u81f4\u6027\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-jShUvbKTNV\">\u7e3d\u7d50<\/h2>\n<p>Go \u8a9e\u8a00\u7684 <code>sync<\/code> \u5305\u63d0\u4f9b\u4e86\u5f37\u5927\u7684\u5de5\u5177\u4f86\u8655\u7406\u4e26\u767c\u7de8\u7a0b\u4e2d\u7684\u540c\u6b65\u554f\u984c\u3002\u901a\u904e\u4f7f\u7528 <code id=\"mutex-jShUvbKTNV\">Mutex<\/code> \u548c <code id=\"rwmutex-jShUvbKTNV\">RWMutex<\/code>\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u6709\u6548\u5730\u9650\u5236\u7dda\u7a0b\u5c0d\u5171\u4eab\u8b8a\u91cf\u7684\u8a2a\u554f\uff0c\u5f9e\u800c\u907f\u514d\u6578\u64da\u7af6\u722d\u548c\u4e0d\u4e00\u81f4\u6027\u554f\u984c\u3002\u9019\u4e9b\u9396\u6a5f\u5236\u662f\u69cb\u5efa\u7a69\u5b9a\u548c\u53ef\u9760\u7684\u4e26\u767c\u61c9\u7528\u7a0b\u5e8f\u7684\u57fa\u77f3\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u5e6b\u52a9\u60a8\u8f15\u9b06\u90e8\u7f72\u548c\u7ba1\u7406\u60a8\u7684\u61c9\u7528\u7a0b\u5e8f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3 Go \u8a9e\u8a00\u4e2d\u7684 sync \u5305\u8207\u9396\uff0c\u5b78\u7fd2\u5982\u4f55\u6709\u6548\u9650\u5236\u7dda\u7a0b\u5c0d\u8b8a\u91cf\u7684\u8a2a\u554f\uff0c\u78ba\u4fdd\u6578\u64da\u5b89\u5168\u8207\u4e00\u81f4\u6027\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4924],"tags":[],"class_list":["post-57614","post","type-post","status-publish","format-standard","hentry","category-setup-tutorials"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/57614","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=57614"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/57614\/revisions"}],"predecessor-version":[{"id":57615,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/57614\/revisions\/57615"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=57614"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=57614"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=57614"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}