{"id":207544,"date":"2025-07-08T10:50:58","date_gmt":"2025-07-08T02:50:58","guid":{"rendered":"https:\/\/server.hk\/cnblog\/207544\/"},"modified":"2025-07-08T10:50:58","modified_gmt":"2025-07-08T02:50:58","slug":"mutex-lock-%e5%a6%82%e4%bd%95%e7%9f%a5%e9%81%93%e8%a6%81%e9%94%81%e5%ae%9a%e5%93%aa%e4%ba%9b%e5%8f%98%e9%87%8f%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/207544\/","title":{"rendered":"mutex.Lock() \u5982\u4f55\u77e5\u9053\u8981\u9501\u5b9a\u54ea\u4e9b\u53d8\u91cf\uff1f"},"content":{"rendered":"

<\/b> <\/p>\n

\u5f53\u524d\u4f4d\u7f6e\uff1a ><\/span> ><\/span> ><\/span> ><\/span> mutex.Lock() \u5982\u4f55\u77e5\u9053\u8981\u9501\u5b9a\u54ea\u4e9b\u53d8\u91cf\uff1f<\/span><\/p>\n

\u6765\u6e90\uff1astackoverflow<\/span>
\n2024-04-23 15:00:37<\/span>
\n<\/i>0\u6d4f\u89c8<\/span>
\n<\/i>\u6536\u85cf<\/span> <\/p>\n

Golang\u5c0f\u767d\u4e00\u679a\uff0c\u6b63\u5728\u4e0d\u65ad\u5b66\u4e60\u79ef\u7d2f\u77e5\u8bc6\uff0c\u73b0\u5c06\u5b66\u4e60\u5230\u7684\u77e5\u8bc6\u8bb0\u5f55\u4e00\u4e0b\uff0c\u4e5f\u662f\u5c06\u6211\u7684\u6240\u5f97\u5206\u4eab\u7ed9\u5927\u5bb6\uff01\u800c\u4eca\u5929\u8fd9\u7bc7\u6587\u7ae0\u300amutex.Lock() \u5982\u4f55\u77e5\u9053\u8981\u9501\u5b9a\u54ea\u4e9b\u53d8\u91cf\uff1f\u300b\u5e26\u5927\u5bb6\u6765\u4e86\u89e3\u4e00\u4e0b##content_title##\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u7684\u77e5\u8bc6\u79ef\u7d2f\u6709\u6240\u5e2e\u52a9\uff0c\u4ece\u800c\u5f25\u8865\u81ea\u5df1\u7684\u4e0d\u8db3\uff0c\u52a9\u529b\u5b9e\u6218\u5f00\u53d1\uff01<\/p>\n

<\/p>\n

\u95ee\u9898\u5185\u5bb9
\n <\/p>\n

\u6211\u662f\u4e2a\u65b0\u624b\uff0c\u6240\u4ee5\u8bf7\u6e29\u67d4\u4e00\u70b9\u3002 <\/p>\n

\u6240\u4ee5\u6211\u5df2\u7ecf\u5728\u6211\u7684\u4e00\u4e9b\u4ee3\u7801\u4e2d\u4f7f\u7528\u4e92\u65a5\u4f53\u51e0\u5468\u4e86\u3002\u6211\u7406\u89e3\u5176\u80cc\u540e\u7684\u6982\u5ff5\uff1a\u9501\u5b9a\u5bf9\u7279\u5b9a\u8d44\u6e90\u7684\u8bbf\u95ee\uff0c\u4e0e\u5176\u4ea4\u4e92\uff08\u8bfb\u6216\u5199\uff09\uff0c\u7136\u540e\u518d\u6b21\u4e3a\u5176\u4ed6\u8d44\u6e90\u89e3\u9501\u3002 <\/p>\n

\u6211\u4f7f\u7528\u7684\u4e92\u65a5\u4f53\u4ee3\u7801\u4e3b\u8981\u662f\u590d\u5236\u7c98\u8d34\u8c03\u6574\u3002\u4ee3\u7801\u8fd0\u884c\u4e86\uff0c\u4f46\u6211\u4ecd\u5728\u5c1d\u8bd5\u4e86\u89e3\u5b83\u7684\u5185\u90e8\u5de5\u4f5c\u539f\u7406\u3002\u5230\u76ee\u524d\u4e3a\u6b62\uff0c\u6211\u4e00\u76f4\u5728\u7ed3\u6784\u4e2d\u4f7f\u7528\u4e92\u65a5\u4f53\u6765\u9501\u5b9a\u7ed3\u6784\u3002\u4eca\u5929\u6211\u53d1\u73b0\u4e86\u8fd9\u4e2a\u4f8b\u5b50\uff0c\u8fd9\u8ba9\u6211\u5b8c\u5168\u4e0d\u6e05\u695a\u4e92\u65a5\u9501\u5b9e\u9645\u4e0a\u9501\u5b9a\u4e86\u4ec0\u4e48\u3002\u4e0b\u9762\u662f\u4e00\u6bb5\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n

var state = make(map[int]int)\n\nvar mutex = &sync.Mutex{}\n\nvar readOps uint64\nvar writeOps uint64\n\n\/\/ Here we start 100 goroutines to execute repeated reads against the state, once per millisecond in each goroutine.\nfor r := 0; r < 100; r++ {\n    go func() {\n        total := 0\n        for {\n            key := rand.Intn(5)\n            mutex.Lock()\n            total += state[key]\n            mutex.Unlock()\n            atomic.AddUint64(&readOps, 1)\n\n            time.Sleep(time.Millisecond)\n        }\n    }()\n}<\/pre>\n
\u4ee4\u6211\u56f0\u60d1\u7684\u662f\uff0c\u4e92\u65a5\u4f53\u548c\u5b83\u5e94\u8be5\u9501\u5b9a\u7684\u503c\u4e4b\u95f4\u4f3c\u4e4e\u6ca1\u6709\u4efb\u4f55\u8054\u7cfb\u3002\u76f4\u5230\u4eca\u5929\uff0c\u6211\u8fd8\u8ba4\u4e3a\u4e92\u65a5\u9501\u53ef\u4ee5\u9501\u5b9a\u7279\u5b9a\u53d8\u91cf\uff0c\u4f46\u67e5\u770b\u8fd9\u6bb5\u4ee3\u7801\uff0c\u4f3c\u4e4e\u4ee5\u67d0\u79cd\u65b9\u5f0f\u9501\u5b9a\u6574\u4e2a\u7a0b\u5e8f\uff0c\u53ea\u6267\u884c\u9501\u5b9a\u4e0b\u65b9\u7684\u884c\uff0c\u76f4\u5230\u518d\u6b21\u8fd0\u884c\u89e3\u9501\u3002\u6211\u60f3\u8fd9\u610f\u5473\u7740\u6240\u6709\u5176\u4ed6 goroutine \u90fd\u4f1a\u6682\u505c\u4e00\u4f1a\u513f\uff0c\u76f4\u5230\u518d\u6b21\u8fd0\u884c\u89e3\u9501\u3002\u7531\u4e8e\u4ee3\u7801\u5df2\u7f16\u8bd1\uff0c\u6211\u60f3\u5b83\u53ef\u4ee5\u77e5\u9053 lock()<\/code> \u548c unlock()<\/code> \u4e4b\u95f4\u8bbf\u95ee\u54ea\u4e9b\u53d8\u91cf\uff0c\u4f46\u6211\u4e0d\u786e\u5b9a\u662f\u5426\u662f\u8fd9\u79cd\u60c5\u51b5\u3002<\/p>\n
\u5982\u679c\u6240\u6709\u5176\u4ed6\u7a0b\u5e8f\u6682\u505c\u4e00\u4f1a\u513f\uff0c\u8fd9\u542c\u8d77\u6765\u4e0d\u50cf\u771f\u6b63\u7684\u591a\u5904\u7406\uff0c\u6240\u4ee5\u6211\u731c\u6211\u5bf9\u53d1\u751f\u7684\u4e8b\u60c5\u6ca1\u6709\u5f88\u597d\u7684\u7406\u89e3\u3002<\/p>\n
\u6709\u4eba\u53ef\u4ee5\u5e2e\u6211\u7406\u89e3\u8ba1\u7b97\u673a\u5982\u4f55\u77e5\u9053\u5e94\u8be5\u9501\u5b9a\u54ea\u4e9b\u53d8\u91cf\u5417\uff1f<\/p>\n
 <\/p>\n
\u89e3\u51b3\u65b9\u6848<\/h2>\n
 <\/p>\n
\u9501\u5b9a\u5bf9\u7279\u5b9a\u8d44\u6e90\u7684\u8bbf\u95ee\uff0c\u4e0e\u5176\u4ea4\u4e92\uff08\u8bfb\u6216\u5199\uff09\uff0c\u7136\u540e\u518d\u6b21\u4e3a\u5176\u4ed6\u8d44\u6e90\u89e3\u9501\u3002<\/p>\n
\u57fa\u672c\u4e0a\u662f\u7684\u3002<\/p>\n
\u8ba9\u6211\u56f0\u60d1\u7684\u662f\uff0c\u4e92\u65a5\u4f53\u548c\u5b83\u5e94\u8be5\u9501\u5b9a\u7684\u503c\u4e4b\u95f4\u4f3c\u4e4e\u6ca1\u6709\u4efb\u4f55\u8054\u7cfb\u3002<\/p>\n
\u4e92\u65a5\u4f53\u53ea\u662f\u4e00\u4e2a\u4e92\u65a5\u5bf9\u8c61\uff0c\u7528\u4e8e\u540c\u6b65\u5bf9\u8d44\u6e90\u7684\u8bbf\u95ee\u3002\u8fd9\u610f\u5473\u7740\uff0c\u5982\u679c\u4e24\u4e2a\u4e0d\u540c\u7684 goroutine \u60f3\u8981\u9501\u5b9a\u4e92\u65a5\u9501\uff0c\u5219\u53ea\u6709\u7b2c\u4e00\u4e2a goroutine \u53ef\u4ee5\u8bbf\u95ee\u5b83\u3002\u7b2c\u4e8c\u4e2a goroutine \u73b0\u5728\u65e0\u9650\u671f\u5730\u7b49\u5f85\uff0c\u76f4\u5230\u5b83\u81ea\u5df1\u53ef\u4ee5\u9501\u5b9a\u4e92\u65a5\u9501\u3002\u4e0e\u53d8\u91cf\u6ca1\u6709\u4efb\u4f55\u8054\u7cfb\uff0c\u60a8\u53ef\u4ee5\u6839\u636e\u9700\u8981\u4f7f\u7528\u4e92\u65a5\u4f53\u3002\u4f8b\u5982\u53ea\u6709\u4e00\u4e2ahttp\u8bf7\u6c42\uff0c\u53ea\u6709\u4e00\u4e2a\u6570\u636e\u5e93\u8bfb\/\u5199\u64cd\u4f5c\u6216\u8005\u53ea\u6709\u4e00\u4e2a\u53d8\u91cf\u8d4b\u503c\u3002\u867d\u7136\u6211\u4e0d\u5efa\u8bae\u5728\u8fd9\u4e9b\u793a\u4f8b\u4e2d\u4f7f\u7528\u4e92\u65a5\u9501\uff0c\u4f46\u603b\u4f53\u601d\u8def\u5e94\u8be5\u4f1a\u53d8\u5f97\u6e05\u6670\u3002<\/p>\n
\u4f46\u662f\u770b\u770b\u8fd9\u6bb5\u4ee3\u7801\uff0c\u5b83\u4f3c\u4e4e\u4ee5\u67d0\u79cd\u65b9\u5f0f\u9501\u5b9a\u4e86\u6574\u4e2a\u7a0b\u5e8f\uff0c\u53ea\u6267\u884c\u9501\u5b9a\u4e0b\u65b9\u7684\u884c\uff0c\u76f4\u5230\u518d\u6b21\u8fd0\u884c\u89e3\u9501\u3002<\/p>\n
\u4e0d\u662f\u6574\u4e2a\u7a0b\u5e8f\uff0c\u53ea\u6709\u6bcf\u4e2a\u60f3\u8981\u8bbf\u95ee\u76f8\u540c<\/strong>\u4e92\u65a5\u4f53\u7684 goroutine \u624d\u4f1a\u7b49\u5f85\uff0c\u76f4\u5230\u5b83\u53ef\u4ee5\u8bbf\u95ee\u4e3a\u6b62\u3002<\/p>\n
\u6211\u60f3\u8fd9\u610f\u5473\u7740\u6240\u6709\u5176\u4ed6 goroutine \u90fd\u4f1a\u6682\u505c\u4e00\u4f1a\u513f\uff0c\u76f4\u5230\u518d\u6b21\u8fd0\u884c\u89e3\u9501\u3002<\/p>\n
\u4e0d\uff0c\u4ed6\u4eec\u4e0d\u4f1a\u6682\u505c\u3002\u5b83\u4eec\u6267\u884c\u76f4\u5230\u60f3\u8981\u8bbf\u95ee\u76f8\u540c\u7684\u4e92\u65a5\u9501\u4e3a\u6b62\u3002<\/p>\n
\u5982\u679c\u60a8\u60f3\u4f7f\u7528\u53d8\u91cf\u4e13\u95e8\u5bf9\u4e92\u65a5\u4f53\u8fdb\u884c\u5206\u7ec4\uff0c\u4e3a\u4ec0\u4e48\u4e0d\u521b\u5efa\u4e00\u4e2a\u7ed3\u6784\u4f53\uff1f<\/p>\n
\u7406\u8bba\u8981\u638c\u63e1\uff0c\u5b9e\u64cd\u4e0d\u80fd\u843d\uff01\u4ee5\u4e0a\u5173\u4e8e\u300amutex.Lock() \u5982\u4f55\u77e5\u9053\u8981\u9501\u5b9a\u54ea\u4e9b\u53d8\u91cf\uff1f\u300b\u7684\u8be6\u7ec6\u4ecb\u7ecd\uff0c\u5927\u5bb6\u90fd\u638c\u63e1\u4e86\u5427\uff01\u5982\u679c\u60f3\u8981\u7ee7\u7eed\u63d0\u5347\u81ea\u5df1\u7684\u80fd\u529b\uff0c\u90a3\u4e48\u5c31\u6765\u5173\u6ce8\u516c\u4f17\u53f7\u5427\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5f53\u524d\u4f4d\u7f6e\uff1a > > ...<\/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-207544","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207544","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=207544"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207544\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=207544"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=207544"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=207544"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}