{"id":15521,"date":"2024-11-18T20:03:42","date_gmt":"2024-11-18T12:03:42","guid":{"rendered":"https:\/\/fwq.ai\/blog\/?p=15521"},"modified":"2024-11-18T20:03:42","modified_gmt":"2024-11-18T12:03:42","slug":"go%e4%b8%ad%e7%9a%84%e4%ba%92%e6%96%a5%e9%94%81%e4%b8%8e%e8%af%bb%e5%86%99%e9%94%81","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/15521\/","title":{"rendered":"GO\u4e2d\u7684\u4e92\u65a5\u9501\u4e0e\u8bfb\u5199\u9501"},"content":{"rendered":"<p>\u5728\u672c\u8282\uff0c\u6211\u4eec\u5bf9Go\u8bed\u8a00\u6240\u63d0\u4f9b\u7684\u4e0e\u9501\u6709\u5173\u7684API\u8fdb\u884c\u8bf4\u660e\u3002\u8fd9\u5305\u62ec\u4e86\u4e92\u65a5\u9501\u548c\u8bfb\u5199\u9501\u3002\u6211\u4eec\u5728\u7b2c6\u7ae0\u63cf\u8ff0\u8fc7\u4e92\u65a5\u9501\uff0c\u4f46\u5374\u6ca1\u6709\u63d0\u5230\u8fc7\u8bfb\u5199\u9501\u3002\u8fd9\u4e24\u79cd\u9501\u5bf9\u4e8e\u4f20\u7edf\u7684\u5e76\u53d1\u7a0b\u5e8f\u6765\u8bf4\u90fd\u662f\u975e\u5e38\u5e38\u7528\u548c\u91cd\u8981\u7684\u3002<\/p>\n<p>&nbsp;<\/p>\n<h1>\u4e00\u3001\u4e92\u65a5\u9501<\/h1>\n<p>\u4e92\u65a5\u9501\u662f\u4f20\u7edf\u7684\u5e76\u53d1\u7a0b\u5e8f\u5bf9\u5171\u4eab\u8d44\u6e90\u8fdb\u884c\u8bbf\u95ee\u63a7\u5236\u7684\u4e3b\u8981\u624b\u6bb5\u3002\u5b83\u7531\u6807\u51c6\u5e93\u4ee3\u7801\u5305sync\u4e2d\u7684Mutex\u7ed3\u6784\u4f53\u7c7b\u578b\u4ee3\u8868\u3002sync.Mutex\u7c7b\u578b\uff08\u786e\u5207\u5730\u8bf4\uff0c\u662f*sync.Mutex\u7c7b\u578b\uff09\u53ea\u6709\u4e24\u4e2a\u516c\u5f00\u65b9\u6cd5\u2014\u2014Lock\u548cUnlock\u3002\u987e\u540d\u601d\u4e49\uff0c\u524d\u8005\u88ab\u7528\u4e8e\u9501\u5b9a\u5f53\u524d\u7684\u4e92\u65a5\u91cf\uff0c\u800c\u540e\u8005\u5219\u88ab\u7528\u6765\u5bf9\u5f53\u524d\u7684\u4e92\u65a5\u91cf\u8fdb\u884c\u89e3\u9501\u3002<\/p>\n<p>\u7c7b\u578bsync.Mutex\u7684\u96f6\u503c\u8868\u793a\u4e86\u672a\u88ab\u9501\u5b9a\u7684\u4e92\u65a5\u91cf\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u5b83\u662f\u4e00\u4e2a\u5f00\u7bb1\u5373\u7528\u7684\u5de5\u5177\u3002\u6211\u4eec\u53ea\u9700\u5bf9\u5b83\u8fdb\u884c\u7b80\u5355\u58f0\u660e\u5c31\u53ef\u4ee5\u6b63\u5e38\u4f7f\u7528\u4e86\uff0c\u5c31\u50cf\u8fd9\u6837\uff1a<\/p>\n<pre>var mutex sync.Mutex\r\nmutex.Lock()<\/pre>\n<p>\u5728\u6211\u4eec\u4f7f\u7528\u5176\u4ed6\u7f16\u7a0b\u8bed\u8a00\uff08\u6bd4\u5982C\u6216Java\uff09\u7684\u9501\u7c7b\u5de5\u5177\u7684\u65f6\u5019\uff0c\u53ef\u80fd\u4f1a\u72af\u7684\u4e00\u4e2a\u4f4e\u7ea7\u9519\u8bef\u5c31\u662f\u5fd8\u8bb0\u53ca\u65f6\u89e3\u5f00\u5df2\u88ab\u9501\u4f4f\u7684\u9501\uff0c\u4ece\u800c\u5bfc\u81f4\u8bf8\u5982\u6d41\u7a0b\u6267\u884c\u5f02\u5e38\u3001\u7ebf\u7a0b\u6267\u884c\u505c\u6ede\u751a\u81f3\u7a0b\u5e8f\u6b7b\u9501\u7b49\u7b49\u4e00\u7cfb\u5217\u95ee\u9898\u7684\u53d1\u751f\u3002\u7136\u800c\uff0c\u5728Go\u8bed\u8a00\u4e2d\uff0c\u8fd9\u4e2a\u4f4e\u7ea7\u9519\u8bef\u7684\u53d1\u751f\u51e0\u7387\u6781\u4f4e\u3002\u5176\u4e3b\u8981\u539f\u56e0\u662f\u6709defer\u8bed\u53e5\u7684\u5b58\u5728\u3002<br \/>\n\u6211\u4eec\u4e00\u822c\u4f1a\u5728\u9501\u5b9a\u4e92\u65a5\u9501\u4e4b\u540e\u7d27\u63a5\u7740\u5c31\u7528defer\u8bed\u53e5\u6765\u4fdd\u8bc1\u8be5\u4e92\u65a5\u9501\u7684\u53ca\u65f6\u89e3\u9501\u3002\u8bf7\u770b\u4e0b\u9762\u8fd9\u4e2a\u51fd\u6570\uff1a<\/p>\n<pre>var mutex sync.Mutex\r\nfunc write() {\r\nmutex.Lock()\r\ndefer mutex.Unlock()\r\n\/\/ \u7701\u7565\u82e5\u5e72\u6761\u8bed\u53e5\r\n}<\/pre>\n<p>\u51fd\u6570write\u4e2d\u7684\u8fd9\u6761defer\u8bed\u53e5\u4fdd\u8bc1\u4e86\u5728\u8be5\u51fd\u6570\u88ab\u6267\u884c\u7ed3\u675f\u4e4b\u524d\u4e92\u65a5\u9501mutex\u4e00\u5b9a\u4f1a\u88ab\u89e3\u9501\u3002\u8fd9\u7701\u53bb\u4e86\u6211\u4eec\u5728\u6240\u6709return\u8bed\u53e5\u4e4b\u524d\u4ee5\u53ca\u5f02\u5e38\u53d1\u751f\u4e4b\u65f6\u91cd\u590d\u7684\u9644\u52a0\u89e3\u9501\u64cd\u4f5c\u7684\u5de5\u4f5c\u3002\u5728\u51fd\u6570\u7684\u5185\u90e8\u6267\u884c\u6d41\u7a0b\u76f8\u5bf9\u590d\u6742\u7684\u60c5\u51b5\u4e0b\uff0c\u8fd9\u4e2a\u5de5\u4f5c\u91cf\u662f\u4e0d\u5bb9\u5ffd\u89c6\u7684\uff0c\u5e76\u4e14\u6781\u6613\u51fa\u73b0\u9057\u6f0f\u548c\u5bfc\u81f4\u9519\u8bef\u3002\u6240\u4ee5\uff0c\u8fd9\u91cc\u7684defer\u8bed\u53e5\u603b\u662f\u5fc5\u8981\u7684\u3002\u5728Go\u8bed\u8a00\u4e2d\uff0c\u8fd9\u662f\u5f88\u91cd\u8981\u7684\u4e00\u4e2a\u60ef\u7528\u6cd5\u3002\u6211\u4eec\u5e94\u8be5\u517b\u6210\u8fd9\u79cd\u826f\u597d\u7684\u4e60\u60ef\u3002<\/p>\n<p>\u5bf9\u4e8e\u540c\u4e00\u4e2a\u4e92\u65a5\u9501\u7684\u9501\u5b9a\u64cd\u4f5c\u548c\u89e3\u9501\u64cd\u4f5c\u603b\u662f\u5e94\u8be5\u6210\u5bf9\u7684\u51fa\u73b0\u3002\u5982\u679c\u6211\u4eec\u9501\u5b9a\u4e86\u4e00\u4e2a\u5df2\u88ab\u9501\u5b9a\u7684\u4e92\u65a5\u9501\uff0c\u90a3\u4e48\u8fdb\u884c\u91cd\u590d\u9501\u5b9a\u64cd\u4f5c\u7684Goroutine\u5c06\u4f1a\u88ab\u963b\u585e\uff0c\u76f4\u5230\u8be5\u4e92\u65a5\u9501\u56de\u5230\u89e3\u9501\u72b6\u6001\u3002\u8bf7\u770b\u4e0b\u9762\u7684\u793a\u4f8b\uff1a<\/p>\n<pre> func repeatedlyLock() {\r\n     var mutex sync.Mutex\r\n     fmt.Println(\"Lock the lock. (G0)\")\r\n     mutex.Lock()\r\n     fmt.Println(\"The lock is locked. (G0)\")\r\n     for i := 1; i &lt;= 3; i++ {\r\n         go func(i int) {\r\n             fmt.Printf(\"Lock the lock. (G%d)\\n\", i)\r\n             mutex.Lock()\r\n             fmt.Printf(\"The lock is locked. (G%d)\\n\", i)\r\n         }(i)\r\n     }\r\n\r\n     time.Sleep(time.Second)\r\n     fmt.Println(\"Unlock the lock. (G0)\")\r\n     mutex.Unlock()\r\n     fmt.Println(\"The lock is unlocked. (G0)\")\r\n     time.Sleep(time.Second)\r\n }<\/pre>\n<pre>\u6211\u4eec\u628a\u6267\u884crepeatedlyLock\u51fd\u6570\u7684Goroutine\u79f0\u4e3aG0\u3002\u800c\u5728repeatedlyLock\u51fd\u6570\u4e2d\uff0c\u6211\u4eec\u53c8\u542f\u7528\u4e863\u4e2aGoroutine\uff0c\u5e76\u5206\u522b\u628a\u5b83\u4eec\u547d\u540d\u4e3aG1\u3001G2\u548cG3\u3002\u53ef\u4ee5\u770b\u5230\uff0c\u6211\u4eec\u5728\u542f\u7528\u8fd93\u4e2aGoroutine\u4e4b\u524d\u5c31\u5df2\u7ecf\u5bf9\u4e92\u65a5\u9501mutex\u8fdb\u884c\u4e86\u9501\u5b9a\uff0c\u5e76\u4e14\u5728\u8fd93\u4e2aGoroutine\u5c06\u8981\u6267\u884c\u7684go\u51fd\u6570\u7684\u5f00\u59cb\u5904\u4e5f\u52a0\u5165\u4e86\u5bf9mutex\u7684\u9501\u5b9a\u64cd\u4f5c\u3002\u8fd9\u6837\u505a\u7684\u610f\u4e49\u662f\u6a21\u62df\u5e76\u53d1\u5730\u5bf9\u540c\u4e00\u4e2a\u4e92\u65a5\u9501\u8fdb\u884c\u9501\u5b9a\u7684\u60c5\u5f62\u3002\u5f53for\u8bed\u53e5\u88ab\u6267\u884c\u5b8c\u6bd5\u4e4b\u540e\uff0c\u6211\u4eec\u5148\u8ba9G0\u5c0f\u77611\u79d2\u949f\uff0c\u4ee5\u4f7f\u8fd0\u884c\u65f6\u7cfb\u7edf\u6709\u5145\u8db3\u7684\u65f6\u95f4\u5f00\u59cb\u8fd0\u884cG1\u3001G2\u548cG3\u3002\u5728\u8fd9\u4e4b\u540e\uff0c\u89e3\u9501mutex\u3002\u4e3a\u4e86\u80fd\u591f\u8ba9\u8bfb\u8005\u66f4\u52a0\u6e05\u6670\u5730\u4e86\u89e3\u5230repeatedlyLock\u51fd\u6570\u88ab\u6267\u884c\u7684\u60c5\u51b5\uff0c\u6211\u4eec\u5728\u8fd9\u4e9b\u9501\u5b9a\u548c\u89e3\u9501\u64cd\u4f5c\u7684\u524d\u540e\u52a0\u5165\u4e86\u82e5\u5e72\u6761\u6253\u5370\u8bed\u53e5\uff0c\u5e76\u5728\u6253\u5370\u5185\u5bb9\u4e2d\u6dfb\u52a0\u4e86\u6211\u4eec\u4e3a\u8fd9\u51e0\u4e2aGoroutine\u8d77\u7684\u540d\u5b57\u3002\u4e5f\u7531\u4e8e\u8fd9\u4e2a\u539f\u56e0\uff0c\u6211\u4eec\u5728repeatedlyLock\u51fd\u6570\u7684\u6700\u540e\u518d\u6b21\u7f16\u5199\u4e86\u4e00\u6761\u201c\u7761\u7720\u201d\u8bed\u53e5\uff0c\u4ee5\u6b64\u4e3a\u53ef\u80fd\u51fa\u73b0\u7684\u5176\u4ed6\u6253\u5370\u5185\u5bb9\u518d\u7b49\u5f85\u4e00\u5c0f\u4f1a\u513f\u3002\r\n \u7ecf\u8fc7\u77ed\u6682\u7684\u6267\u884c\uff0c\u6807\u51c6\u8f93\u51fa\u4e0a\u4f1a\u51fa\u73b0\u5982\u4e0b\u5185\u5bb9\uff1a<\/pre>\n<pre> Lock the lock. (G0)\r\n The lock is locked. (G0)\r\n Lock the lock. (G1)\r\n Lock the lock. (G2)\r\n Lock the lock. (G3)\r\n Unlock the lock. (G0)\r\n The lock is unlocked. (G0)\r\n The lock is locked. (G1)<\/pre>\n<p>\u4ece\u8fd9\u516b\u884c\u6253\u5370\u5185\u5bb9\u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u6e05\u695a\u7684\u770b\u51fa\u4e0a\u8ff0\u56db\u4e2aGoroutine\u7684\u6267\u884c\u60c5\u51b5\u3002\u9996\u5148\uff0c\u5728repeatedlyLock\u51fd\u6570\u88ab\u6267\u884c\u4f0a\u59cb\uff0c\u5bf9\u4e92\u65a5\u9501\u7684\u7b2c\u4e00\u6b21\u9501\u5b9a\u64cd\u4f5c\u4fbf\u88ab\u8fdb\u884c\u5e76\u987a\u5229\u5730\u5b8c\u6210\u3002\u8fd9\u7531\u7b2c\u4e00\u884c\u548c\u7b2c\u4e8c\u884c\u6253\u5370\u5185\u5bb9\u53ef\u4ee5\u770b\u51fa\u3002\u800c\u540e\uff0c\u5728repeatedlyLock\u51fd\u6570\u4e2d\u88ab\u542f\u7528\u7684\u90a3\u4e09\u4e2aGoroutine\u5728G0\u7684\u7b2c\u4e00\u6b21\u201c\u7761\u7720\u201d\u671f\u95f4\u5f00\u59cb\u88ab\u8fd0\u884c\u3002\u5f53\u76f8\u5e94\u7684go\u51fd\u6570\u4e2d\u7684\u5bf9\u4e92\u65a5\u9501\u7684\u9501\u5b9a\u64cd\u4f5c\u88ab\u8fdb\u884c\u7684\u65f6\u5019\uff0c\u5b83\u4eec\u90fd\u88ab\u963b\u585e\u4f4f\u4e86\u3002\u539f\u56e0\u662f\u8be5\u4e92\u65a5\u9501\u5df2\u5904\u4e8e\u9501\u5b9a\u72b6\u6001\u4e86\u3002\u8fd9\u5c31\u662f\u6211\u4eec\u5728\u8fd9\u91cc\u53ea\u770b\u5230\u4e86\u4e09\u4e2a\u8fde\u7eed\u7684Lock the lock. (G&lt;i&gt;)\u800c\u6ca1\u6709\u7acb\u5373\u770b\u5230The lock is locked. (G&lt;i&gt;)\u7684\u539f\u56e0\u3002\u968f\u540e\uff0cG0\u201c\u7761\u9192\u201d\u5e76\u89e3\u9501\u4e92\u65a5\u9501\u3002\u8fd9\u4f7f\u5f97\u6b63\u5728\u88ab\u963b\u585e\u7684G1\u3001G2\u548cG3\u90fd\u4f1a\u6709\u673a\u4f1a\u91cd\u65b0\u9501\u5b9a\u8be5\u4e92\u65a5\u9501\u3002\u4f46\u662f\uff0c\u53ea\u6709\u4e00\u4e2aGoroutine\u4f1a\u6210\u529f\u3002\u6210\u529f\u5b8c\u6210\u9501\u5b9a\u64cd\u4f5c\u7684\u67d0\u4e00\u4e2aGoroutine\u4f1a\u7ee7\u7eed\u6267\u884c\u5728\u8be5\u64cd\u4f5c\u4e4b\u540e\u7684\u8bed\u53e5\u3002\u800c\u5176\u4ed6Goroutine\u5c06\u7ee7\u7eed\u88ab\u963b\u585e\uff0c\u76f4\u5230\u6709\u65b0\u7684\u673a\u4f1a\u5230\u6765\u3002\u8fd9\u4e5f\u5c31\u662f\u4e0a\u8ff0\u6253\u5370\u5185\u5bb9\u4e2d\u7684\u6700\u540e\u4e09\u884c\u6240\u8868\u8fbe\u7684\u542b\u4e49\u3002\u663e\u7136\uff0cG1\u62a2\u5230\u4e86\u8fd9\u6b21\u673a\u4f1a\u5e76\u6210\u529f\u9501\u5b9a\u4e86\u90a3\u4e2a\u4e92\u65a5\u9501\u3002<\/p>\n<p>\u5b9e\u9645\u4e0a\uff0c\u6211\u4eec\u4e4b\u6240\u4ee5\u80fd\u591f\u901a\u8fc7\u4f7f\u7528\u4e92\u65a5\u9501\u5bf9\u5171\u4eab\u8d44\u6e90\u7684\u552f\u4e00\u6027\u8bbf\u95ee\u8fdb\u884c\u63a7\u5236\u6b63\u662f\u56e0\u4e3a\u5b83\u7684\u8fd9\u4e00\u7279\u6027\u3002\u8fd9\u6709\u6548\u7684\u5bf9\u7ade\u6001\u6761\u4ef6\u8fdb\u884c\u4e86\u6d88\u9664\u3002<\/p>\n<p>\u4e92\u65a5\u9501\u7684\u9501\u5b9a\u64cd\u4f5c\u7684\u9006\u64cd\u4f5c\u5e76\u4e0d\u4f1a\u5f15\u8d77\u4efb\u4f55Goroutine\u7684\u963b\u585e\u3002\u4f46\u662f\uff0c\u5b83\u7684\u8fdb\u884c\u6709\u53ef\u80fd\u5f15\u53d1\u8fd0\u884c\u65f6\u6050\u614c\u3002\u66f4\u786e\u5207\u7684\u8bb2\uff0c\u5f53\u6211\u4eec\u5bf9\u4e00\u4e2a\u5df2\u5904\u4e8e\u89e3\u9501\u72b6\u6001\u7684\u4e92\u65a5\u9501\u8fdb\u884c\u89e3\u9501\u64cd\u4f5c\u7684\u65f6\u5019\uff0c\u5c31\u4f1a\u5df2\u53d1\u4e00\u4e2a\u8fd0\u884c\u65f6\u6050\u614c\u3002\u8fd9\u79cd\u60c5\u51b5\u5f88\u53ef\u80fd\u4f1a\u51fa\u73b0\u5728\u76f8\u5bf9\u590d\u6742\u7684\u6d41\u7a0b\u4e4b\u4e2d\u2014\u2014\u6211\u4eec\u53ef\u80fd\u4f1a\u5728\u67d0\u4e2a\u6216\u591a\u4e2a\u5206\u652f\u4e2d\u91cd\u590d\u7684\u52a0\u5165\u9488\u5bf9\u540c\u4e00\u4e2a\u4e92\u65a5\u9501\u7684\u89e3\u9501\u64cd\u4f5c\u3002\u907f\u514d\u8fd9\u79cd\u60c5\u51b5\u53d1\u751f\u7684\u6700\u7b80\u5355\u3001\u6709\u6548\u7684\u65b9\u5f0f\u4f9d\u7136\u662f\u4f7f\u7528defer\u8bed\u53e5\u3002\u8fd9\u6837\u66f4\u5bb9\u6613\u4fdd\u8bc1\u89e3\u9501\u64cd\u4f5c\u7684\u552f\u4e00\u6027\u3002<\/p>\n<p>\u867d\u7136\u4e92\u65a5\u9501\u53ef\u4ee5\u88ab\u76f4\u63a5\u7684\u5728\u591a\u4e2aGoroutine\u4e4b\u95f4\u5171\u4eab\uff0c\u4f46\u662f\u6211\u4eec\u8fd8\u662f\u5f3a\u70c8\u5efa\u8bae\u628a\u5bf9\u540c\u4e00\u4e2a\u4e92\u65a5\u9501\u7684\u6210\u5bf9\u7684\u9501\u5b9a\u548c\u89e3\u9501\u64cd\u4f5c\u653e\u5728\u540c\u4e00\u4e2a\u5c42\u6b21\u7684\u4ee3\u7801\u5757\u4e2d\u3002\u4f8b\u5982\uff0c\u5728\u540c\u4e00\u4e2a\u51fd\u6570\u6216\u65b9\u6cd5\u4e2d\u5bf9\u67d0\u4e2a\u4e92\u65a5\u9501\u7684\u8fdb\u884c\u9501\u5b9a\u548c\u89e3\u9501\u3002\u53c8\u4f8b\u5982\uff0c\u628a\u4e92\u65a5\u9501\u4f5c\u4e3a\u67d0\u4e00\u4e2a\u7ed3\u6784\u4f53\u7c7b\u578b\u4e2d\u7684\u5b57\u6bb5\uff0c\u4ee5\u4fbf\u5728\u8be5\u7c7b\u578b\u7684\u591a\u4e2a\u65b9\u6cd5\u4e2d\u4f7f\u7528\u5b83\u3002\u6b64\u5916\uff0c\u6211\u4eec\u8fd8\u5e94\u8be5\u4f7f\u4ee3\u8868\u4e92\u65a5\u9501\u7684\u53d8\u91cf\u7684\u8bbf\u95ee\u6743\u9650\u5c3d\u91cf\u7684\u4f4e\u3002\u8fd9\u6837\u624d\u80fd\u5c3d\u91cf\u907f\u514d\u5b83\u5728\u4e0d\u76f8\u5173\u7684\u6d41\u7a0b\u4e2d\u88ab\u8bef\u7528\uff0c\u4ece\u800c\u5bfc\u81f4\u7a0b\u5e8f\u4e0d\u6b63\u786e\u7684\u884c\u4e3a\u3002<\/p>\n<p>\u4e92\u65a5\u9501\u662f\u6211\u4eec\u89c1\u5230\u8fc7\u7684\u4f17\u591a\u540c\u6b65\u5de5\u5177\u4e2d\u6700\u7b80\u5355\u7684\u4e00\u4e2a\u3002\u53ea\u8981\u9075\u5faa\u524d\u9762\u63d0\u53ca\u7684\u51e0\u4e2a\u5c0f\u6280\u5de7\uff0c\u6211\u4eec\u5c31\u53ef\u4ee5\u4ee5\u6b63\u786e\u3001\u9ad8\u6548\u7684\u65b9\u5f0f\u4f7f\u7528\u4e92\u65a5\u9501\uff0c\u5e76\u7528\u5b83\u6765\u786e\u4fdd\u5bf9\u5171\u4eab\u8d44\u6e90\u7684\u8bbf\u95ee\u7684\u552f\u4e00\u6027\u3002\u4e0b\u9762\u6211\u4eec\u6765\u770b\u770b\u7a0d\u5fae\u590d\u6742\u4e00\u4e9b\u7684\u9501\u5b9e\u73b0\u2014\u2014\u8bfb\u5199\u9501\u3002<\/p>\n<h1>\u4e8c\u3001\u8bfb\u5199\u9501<\/h1>\n<p>\u8bfb\u5199\u9501\u5373\u662f\u9488\u5bf9\u4e8e\u8bfb\u5199\u64cd\u4f5c\u7684\u4e92\u65a5\u9501\u3002\u5b83\u4e0e\u666e\u901a\u7684\u4e92\u65a5\u9501\u6700\u5927\u7684\u4e0d\u540c\u5c31\u662f\uff0c\u5b83\u53ef\u4ee5\u5206\u522b\u9488\u5bf9\u8bfb\u64cd\u4f5c\u548c\u5199\u64cd\u4f5c\u8fdb\u884c\u9501\u5b9a\u548c\u89e3\u9501\u64cd\u4f5c\u3002\u8bfb\u5199\u9501\u9075\u5faa\u7684\u8bbf\u95ee\u63a7\u5236\u89c4\u5219\u4e0e\u4e92\u65a5\u9501\u6709\u6240\u4e0d\u540c\u3002\u5728\u8bfb\u5199\u9501\u7ba1\u8f96\u7684\u8303\u56f4\u5185\uff0c\u5b83\u5141\u8bb8\u4efb\u610f\u4e2a\u8bfb\u64cd\u4f5c\u7684\u540c\u65f6\u8fdb\u884c\u3002\u4f46\u662f\uff0c\u5728\u540c\u4e00\u65f6\u523b\uff0c\u5b83\u53ea\u5141\u8bb8\u6709\u4e00\u4e2a\u5199\u64cd\u4f5c\u5728\u8fdb\u884c\u3002\u5e76\u4e14\uff0c\u5728\u67d0\u4e00\u4e2a\u5199\u64cd\u4f5c\u88ab\u8fdb\u884c\u7684\u8fc7\u7a0b\u4e2d\uff0c\u8bfb\u64cd\u4f5c\u7684\u8fdb\u884c\u4e5f\u662f\u4e0d\u88ab\u5141\u8bb8\u7684\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c<strong>\u8bfb\u5199\u9501\u63a7\u5236\u4e0b\u7684\u591a\u4e2a\u5199\u64cd\u4f5c\u4e4b\u95f4\u90fd\u662f\u4e92\u65a5\u7684\uff0c\u5e76\u4e14\u5199\u64cd\u4f5c\u4e0e\u8bfb\u64cd\u4f5c\u4e4b\u95f4\u4e5f\u90fd\u662f\u4e92\u65a5\u7684<\/strong>\u3002\u4f46\u662f\uff0c\u591a\u4e2a\u8bfb\u64cd\u4f5c\u4e4b\u95f4\u5374\u4e0d\u5b58\u5728\u4e92\u65a5\u5173\u7cfb\u3002<\/p>\n<p>\u8fd9\u6837\u7684\u89c4\u5219\u5bf9\u4e8e\u9488\u5bf9\u540c\u4e00\u5757\u6570\u636e\u7684\u5e76\u53d1\u8bfb\u5199\u6765\u8bb2\u662f\u975e\u5e38\u8d34\u5207\u7684\u3002\u56e0\u4e3a\uff0c\u65e0\u8bba\u8bfb\u64cd\u4f5c\u7684\u5e76\u53d1\u91cf\u6709\u591a\u5c11\uff0c\u8fd9\u4e9b\u64cd\u4f5c\u90fd\u4e0d\u4f1a\u5bf9\u6570\u636e\u672c\u8eab\u9020\u6210\u53d8\u66f4\u3002\u800c\u5199\u64cd\u4f5c\u4e0d\u4f46\u4f1a\u5bf9\u540c\u65f6\u8fdb\u884c\u7684\u5176\u4ed6\u5199\u64cd\u4f5c\u8fdb\u884c\u5e72\u6270\uff0c\u8fd8\u6709\u53ef\u80fd\u9020\u6210\u540c\u65f6\u8fdb\u884c\u7684\u8bfb\u64cd\u4f5c\u7684\u7ed3\u679c\u7684\u4e0d\u6b63\u786e\u3002\u4f8b\u5982\uff0c\u572832\u4f4d\u7684\u64cd\u4f5c\u7cfb\u7edf\u4e2d\uff0c\u9488\u5bf9int64\u7c7b\u578b\u503c\u7684\u8bfb\u64cd\u4f5c\u548c\u5199\u64cd\u4f5c\u90fd\u4e0d\u53ef\u80fd\u53ea\u7531\u4e00\u4e2aCPU\u6307\u4ee4\u5b8c\u6210\u3002\u5728\u4e00\u4e2a\u5199\u64cd\u4f5c\u88ab\u8fdb\u884c\u7684\u8fc7\u7a0b\u5f53\u4e2d\uff0c\u9488\u5bf9\u540c\u4e00\u4e2a\u53ea\u7684\u8bfb\u64cd\u4f5c\u53ef\u80fd\u4f1a\u8bfb\u53d6\u5230\u672a\u88ab\u4fee\u6539\u5b8c\u6210\u7684\u503c\u3002\u8be5\u503c\u65e2\u4e0d\u4e0e\u65e7\u7684\u503c\u76f8\u7b49\uff0c\u4e5f\u4e0d\u7b49\u4e8e\u65b0\u7684\u503c\u3002\u8fd9\u79cd\u9519\u8bef\u5f80\u5f80\u4e0d\u6613\u88ab\u53d1\u73b0\uff0c\u4e14\u5f88\u96be\u88ab\u4fee\u6b63\u3002\u56e0\u6b64\uff0c\u5728\u8fd9\u6837\u7684\u573a\u666f\u4e0b\uff0c\u8bfb\u5199\u9501\u53ef\u4ee5\u5728\u5927\u5927\u964d\u4f4e\u56e0\u4f7f\u7528\u9501\u800c\u5bf9\u7a0b\u5e8f\u6027\u80fd\u9020\u6210\u7684\u635f\u8017\u7684\u60c5\u51b5\u4e0b\u5b8c\u6210\u5bf9\u5171\u4eab\u8d44\u6e90\u7684\u8bbf\u95ee\u63a7\u5236\u3002<br \/>\n\u5728Go\u8bed\u8a00\u4e2d\uff0c\u8bfb\u5199\u9501\u7531\u7ed3\u6784\u4f53\u7c7b\u578bsync.RWMutex\u4ee3\u8868\u3002\u4e0e\u4e92\u65a5\u9501\u7c7b\u4f3c\uff0csync.RWMutex\u7c7b\u578b\u7684\u96f6\u503c\u5c31\u5df2\u7ecf\u662f\u7acb\u5373\u53ef\u7528\u7684\u8bfb\u5199\u9501\u4e86\u3002\u5728\u6b64\u7c7b\u578b\u7684\u65b9\u6cd5\u96c6\u5408\u4e2d\u5305\u542b\u4e86\u4e24\u5bf9\u65b9\u6cd5\uff0c\u5373\uff1a<\/p>\n<pre>func (*RWMutex) Lock\r\nfunc (*RWMutex) Unlock<\/pre>\n<p>\u548c<\/p>\n<pre>func (*RWMutex) RLock\r\nfunc (*RWMutex) RUnlock<\/pre>\n<p>\u524d\u4e00\u5bf9\u65b9\u6cd5\u7684\u540d\u79f0\u548c\u7b7e\u540d\u4e0e\u4e92\u65a5\u9501\u7684\u90a3\u4e24\u4e2a\u65b9\u6cd5\u5b8c\u5168\u4e00\u81f4\u3002\u5b83\u4eec\u5206\u522b\u4ee3\u8868\u4e86\u5bf9\u5199\u64cd\u4f5c\u7684\u9501\u5b9a\u548c\u89e3\u9501\u3002\u4ee5\u4e0b\u7b80\u79f0\u5b83\u4eec\u4e3a\u5199\u9501\u5b9a\u548c\u5199\u89e3\u9501\u3002\u800c\u540e\u4e00\u5bf9\u65b9\u6cd5\u5219\u5206\u522b\u8868\u793a\u4e86\u5bf9\u8bfb\u64cd\u4f5c\u7684\u9501\u5b9a\u548c\u89e3\u9501\u3002\u4ee5\u4e0b\u7b80\u79f0\u5b83\u4eec\u4e3a\u8bfb\u9501\u5b9a\u548c\u8bfb\u89e3\u9501\u3002<\/p>\n<p>\u5bf9\u5df2\u88ab\u5199\u9501\u5b9a\u7684\u8bfb\u5199\u9501\u8fdb\u884c\u5199\u9501\u5b9a\uff0c\u4f1a\u9020\u6210\u5f53\u524dGoroutine\u7684\u963b\u585e\uff0c\u76f4\u5230\u8be5\u8bfb\u5199\u9501\u88ab\u5199\u89e3\u9501\u3002\u5f53\u7136\uff0c\u5982\u679c\u6709\u591a\u4e2aGoroutine\u56e0\u6b64\u800c\u88ab\u963b\u585e\uff0c\u90a3\u4e48\u5f53\u5bf9\u5e94\u7684\u5199\u89e3\u9501\u88ab\u8fdb\u884c\u4e4b\u65f6\u53ea\u4f1a\u4f7f\u5176\u4e2d\u4e00\u4e2aGoroutine\u7684\u8fd0\u884c\u88ab\u6062\u590d\u3002\u7c7b\u4f3c\u7684\uff0c\u5bf9\u4e00\u4e2a\u5df2\u88ab\u5199\u9501\u5b9a\u7684\u8bfb\u5199\u9501\u8fdb\u884c\u8bfb\u9501\u5b9a\uff0c\u4e5f\u4f1a\u963b\u585e\u76f8\u5e94\u7684Goroutine\u3002\u4f46\u4e0d\u540c\u7684\u662f\uff0c\u4e00\u65e6\u8be5\u8bfb\u5199\u9501\u88ab\u5199\u89e3\u9501\uff0c\u90a3\u4e48\u6240\u6709\u56e0\u6b32\u8fdb\u884c\u8bfb\u9501\u5b9a\u800c\u88ab\u963b\u585e\u7684Goroutine\u7684\u8fd0\u884c\u90fd\u4f1a\u88ab\u6062\u590d\u3002\u53e6\u4e00\u65b9\u9762\uff0c\u5982\u679c\u5728\u8fdb\u884c\u8fc7\u7a0b\u4e2d\u53d1\u73b0\u5f53\u524d\u7684\u8bfb\u5199\u9501\u5df2\u88ab\u8bfb\u9501\u5b9a\uff0c\u90a3\u4e48\u8fd9\u4e2a\u5199\u9501\u5b9a\u64cd\u4f5c\u5c06\u4f1a\u7b49\u5f85\u76f4\u81f3\u6240\u6709\u65bd\u52a0\u4e8e\u8be5\u8bfb\u5199\u9501\u4e4b\u4e0a\u7684\u8bfb\u9501\u5b9a\u90fd\u88ab\u6e05\u9664\u3002\u540c\u6837\u7684\uff0c\u5728\u6709\u591a\u4e2a\u5199\u9501\u5b9a\u64cd\u4f5c\u4e3a\u6b64\u800c\u7b49\u5f85\u7684\u60c5\u51b5\u4e0b\uff0c\u76f8\u5e94\u7684\u8bfb\u9501\u5b9a\u7684\u5168\u90e8\u6e05\u9664\u53ea\u80fd\u8ba9\u5176\u4e2d\u7684\u67d0\u4e00\u4e2a\u5199\u9501\u5b9a\u64cd\u4f5c\u83b7\u5f97\u8fdb\u884c\u7684\u673a\u4f1a\u3002<\/p>\n<p>\u73b0\u5728\u6765\u5173\u6ce8\u5199\u89e3\u9501\u548c\u8bfb\u89e3\u9501\u3002\u5982\u679c\u5bf9\u4e00\u4e2a\u672a\u88ab\u5199\u9501\u5b9a\u7684\u8bfb\u5199\u9501\u8fdb\u884c\u5199\u89e3\u9501\uff0c\u90a3\u4e48\u4f1a\u5f15\u53d1\u4e00\u4e2a\u8fd0\u884c\u65f6\u6050\u614c\u3002\u7c7b\u4f3c\u7684\uff0c\u5f53\u5bf9\u4e00\u4e2a\u672a\u88ab\u8bfb\u9501\u5b9a\u7684\u8bfb\u5199\u9501\u8fdb\u884c\u8bfb\u89e3\u9501\u7684\u65f6\u5019\u4e5f\u4f1a\u5f15\u53d1\u4e00\u4e2a\u8fd0\u884c\u65f6\u6050\u614c\u3002\u5199\u89e3\u9501\u5728\u8fdb\u884c\u7684\u540c\u65f6\u4f1a\u8bd5\u56fe\u5524\u9192\u6240\u6709\u56e0\u8fdb\u884c\u8bfb\u9501\u5b9a\u800c\u88ab\u963b\u585e\u7684Goroutine\u3002\u800c\u8bfb\u89e3\u9501\u5728\u8fdb\u884c\u7684\u65f6\u5019\u5219\u4f1a\u8bd5\u56fe\u5524\u9192\u4e00\u4e2a\u56e0\u8fdb\u884c\u5199\u9501\u5b9a\u800c\u88ab\u963b\u585e\u7684Goroutine\u3002<\/p>\n<p>\u65e0\u8bba\u9501\u5b9a\u9488\u5bf9\u7684\u662f\u5199\u64cd\u4f5c\u8fd8\u662f\u8bfb\u64cd\u4f5c\uff0c\u6211\u4eec\u90fd\u5e94\u8be5\u5c3d\u91cf\u53ca\u65f6\u7684\u5bf9\u76f8\u5e94\u7684\u9501\u8fdb\u884c\u89e3\u9501\u3002\u5bf9\u4e8e\u5199\u89e3\u9501\uff0c\u6211\u4eec\u81ea\u4e0d\u5fc5\u591a\u8bf4\u3002\u800c\u8bfb\u89e3\u9501\u7684\u53ca\u65f6\u8fdb\u884c\u5f80\u5f80\u66f4\u5bb9\u6613\u88ab\u6211\u4eec\u5ffd\u89c6\u3002\u867d\u8bf4\u8bfb\u89e3\u9501\u7684\u8fdb\u884c\u5e76\u4e0d\u4f1a\u5bf9\u5176\u4ed6\u6b63\u5728\u8fdb\u884c\u4e2d\u7684\u8bfb\u64cd\u4f5c\u4ea7\u751f\u4efb\u4f55\u5f71\u54cd\uff0c\u4f46\u5b83\u5374\u4e0e\u76f8\u5e94\u7684\u5199\u9501\u5b9a\u7684\u8fdb\u884c\u5173\u7cfb\u7d27\u5bc6\u3002\u6ce8\u610f\uff0c\u5bf9\u4e8e\u540c\u4e00\u4e2a\u8bfb\u5199\u9501\u6765\u8bf4\uff0c\u65bd\u52a0\u5728\u5b83\u4e4b\u4e0a\u7684\u8bfb\u9501\u5b9a\u53ef\u4ee5\u6709\u591a\u4e2a\u3002\u56e0\u6b64\uff0c\u53ea\u6709\u6211\u4eec\u5bf9\u4e92\u65a5\u9501\u8fdb\u884c\u76f8\u540c\u6570\u91cf\u7684\u8bfb\u89e3\u9501\uff0c\u624d\u80fd\u591f\u8ba9\u67d0\u4e00\u4e2a\u76f8\u5e94\u7684\u5199\u9501\u5b9a\u83b7\u5f97\u8fdb\u884c\u7684\u673a\u4f1a\u3002\u5426\u5219\uff0c\u540e\u8005\u4f1a\u7ee7\u7eed\u4f7f\u8fdb\u884c\u5b83\u7684Goroutine\u5904\u4e8e\u963b\u585e\u72b6\u6001\u3002\u7531\u4e8esync.RWMutex\u548c*sync.RWMutex\u7c7b\u578b\u90fd\u6ca1\u6709\u76f8\u5e94\u7684\u65b9\u6cd5\u8ba9\u6211\u4eec\u83b7\u5f97\u5df2\u8fdb\u884c\u7684\u8bfb\u9501\u5b9a\u7684\u6570\u91cf\uff0c\u6240\u4ee5\u8fd9\u91cc\u662f\u5f88\u5bb9\u6613\u51fa\u73b0\u95ee\u9898\u7684\u3002\u8fd8\u597d\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528defer\u8bed\u53e5\u6765\u5c3d\u91cf\u907f\u514d\u6b64\u7c7b\u95ee\u9898\u7684\u53d1\u751f\u3002\u8bf7\u8bb0\u4f4f\uff0c\u9488\u5bf9\u540c\u4e00\u4e2a\u8bfb\u5199\u9501\u7684\u5199\u9501\u5b9a\u548c\u8bfb\u9501\u5b9a\u662f\u4e92\u65a5\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\/>\n\u5047\u8bbe\uff0c\u6211\u4eec\u9700\u8981\u521b\u5efa\u4e00\u4e2a\u6587\u4ef6\u6765\u5b58\u653e\u6570\u636e\u3002\u5728\u540c\u4e00\u4e2a\u65f6\u523b\uff0c\u53ef\u80fd\u4f1a\u6709\u591a\u4e2aGoroutine\u5206\u522b\u8fdb\u884c\u5bf9\u6b64\u6587\u4ef6\u7684\u8fdb\u884c\u5199\u64cd\u4f5c\u548c\u8bfb\u64cd\u4f5c\u3002\u6bcf\u4e00\u6b21\u5199\u64cd\u4f5c\u90fd\u5e94\u8be5\u5411\u8fd9\u4e2a\u6587\u4ef6\u5199\u5165\u82e5\u5e72\u4e2a\u5b57\u8282\u7684\u6570\u636e\u3002\u8fd9\u82e5\u5e72\u5b57\u8282\u7684\u6570\u636e\u5e94\u8be5\u4f5c\u4e3a\u4e00\u4e2a\u72ec\u7acb\u7684\u6570\u636e\u5757\u5b58\u5728\u3002\u8fd9\u5c31\u610f\u5473\u7740\uff0c\u5199\u64cd\u4f5c\u4e4b\u95f4\u4e0d\u80fd\u5f7c\u6b64\u5e72\u6270\uff0c\u5199\u5165\u7684\u5185\u5bb9\u4e4b\u95f4\u4e5f\u4e0d\u80fd\u51fa\u73b0\u7a7f\u63d2\u548c\u6df7\u6dc6\u7684\u60c5\u51b5\u3002\u53e6\u4e00\u65b9\u9762\uff0c\u6bcf\u4e00\u6b21\u8bfb\u64cd\u4f5c\u90fd\u5e94\u8be5\u4ece\u8fd9\u4e2a\u6587\u4ef6\u4e2d\u8bfb\u53d6\u4e00\u4e2a\u72ec\u7acb\u3001\u5b8c\u6574\u7684\u6570\u636e\u5757\u3002\u5b83\u4eec\u8bfb\u53d6\u7684\u6570\u636e\u5757\u4e0d\u80fd\u91cd\u590d\uff0c\u4e14\u9700\u8981\u6309\u987a\u5e8f\u8bfb\u53d6\u3002\u4f8b\u5982\uff0c\u7b2c\u4e00\u4e2a\u8bfb\u64cd\u4f5c\u8bfb\u53d6\u4e86\u6570\u636e\u57571\uff0c\u90a3\u4e48\u7b2c\u4e8c\u4e2a\u8bfb\u64cd\u4f5c\u5c31\u5e94\u8be5\u53bb\u8bfb\u53d6\u6570\u636e\u57572\uff0c\u800c\u7b2c\u4e09\u4e2a\u8bfb\u64cd\u4f5c\u5219\u5e94\u8be5\u8bfb\u53d6\u6570\u636e\u57573\uff0c\u4ee5\u6b64\u7c7b\u63a8\u3002\u5bf9\u4e8e\u8fd9\u4e9b\u8bfb\u64cd\u4f5c\u662f\u5426\u53ef\u4ee5\u88ab\u540c\u65f6\u8fdb\u884c\uff0c\u8fd9\u91cc\u5e76\u4e0d\u505a\u8981\u6c42\u3002\u5373\u4f7f\u5b83\u4eec\u88ab\u540c\u65f6\u8fdb\u884c\uff0c\u7a0b\u5e8f\u4e5f\u5e94\u8be5\u5206\u8fa8\u51fa\u5b83\u4eec\u7684\u5148\u540e\u987a\u5e8f\u3002<br \/>\n\u4e3a\u4e86\u7a81\u51fa\u91cd\u70b9\uff0c\u6211\u4eec\u89c4\u5b9a\u6bcf\u4e2a\u6570\u636e\u5757\u7684\u957f\u5ea6\u90fd\u662f\u76f8\u540c\u7684\u3002\u8be5\u957f\u5ea6\u5e94\u8be5\u5728\u521d\u59cb\u5316\u7684\u65f6\u5019\u88ab\u7ed9\u5b9a\u3002\u82e5\u5199\u64cd\u4f5c\u5b9e\u9645\u6b32\u5199\u5165\u6570\u636e\u7684\u957f\u5ea6\u8d85\u8fc7\u4e86\u8be5\u503c\uff0c\u5219\u8d85\u51fa\u90e8\u5206\u5c06\u4f1a\u88ab\u622a\u6389\u3002<br \/>\n\u5f53\u6211\u4eec\u62ff\u5230\u8fd9\u6837\u4e00\u4e2a\u9700\u6c42\u7684\u65f6\u5019\uff0c\u9996\u5148\u5e94\u8be5\u60f3\u5230\u4f7f\u7528os.File\u7c7b\u578b\u3002\u5b83\u4e3a\u6211\u4eec\u64cd\u4f5c\u6587\u4ef6\u7cfb\u7edf\u4e2d\u7684\u6587\u4ef6\u63d0\u4f9b\u4e86\u5e95\u5c42\u7684\u652f\u6301\u3002\u4f46\u662f\uff0c\u8be5\u7c7b\u578b\u7684\u76f8\u5173\u65b9\u6cd5\u5e76\u6ca1\u6709\u5bf9\u5e76\u53d1\u64cd\u4f5c\u7684\u5b89\u5168\u6027\u8fdb\u884c\u4fdd\u8bc1\u3002\u6362\u53e5\u8bdd\u8bf4\uff0c\u8fd9\u4e9b\u65b9\u6cd5\u4e0d\u662f\u5e76\u53d1\u5b89\u5168\u7684\u3002\u6211\u53ea\u80fd\u901a\u8fc7\u989d\u5916\u7684\u540c\u6b65\u624b\u6bb5\u6765\u4fdd\u8bc1\u8fd9\u4e00\u70b9\u3002\u9274\u4e8e\u8fd9\u91cc\u9700\u8981\u5206\u522b\u5bf9\u4e24\u7c7b\u64cd\u4f5c\uff08\u5373\u5199\u64cd\u4f5c\u548c\u8bfb\u64cd\u4f5c\uff09\u8fdb\u884c\u8bbf\u95ee\u63a7\u5236\uff0c\u6240\u4ee5\u8bfb\u5199\u9501\u5728\u8fd9\u91cc\u4f1a\u6bd4\u666e\u901a\u7684\u4e92\u65a5\u9501\u66f4\u52a0\u9002\u7528\u3002\u4e0d\u8fc7\uff0c\u5173\u4e8e\u591a\u4e2a\u8bfb\u64cd\u4f5c\u8981\u6309\u987a\u5e8f\u4e14\u4e0d\u80fd\u91cd\u590d\u8bfb\u53d6\u7684\u8fd9\u4e2a\u95ee\u9898\uff0c\u6211\u4eec\u9700\u8fd8\u8981\u4f7f\u7528\u5176\u4ed6\u8f85\u52a9\u624b\u6bb5\u6765\u89e3\u51b3\u3002<br \/>\n\u4e3a\u4e86\u5b9e\u73b0\u4e0a\u8ff0\u9700\u6c42\uff0c\u6211\u4eec\u9700\u8981\u521b\u5efa\u4e00\u4e2a\u7c7b\u578b\u3002\u4f5c\u4e3a\u8be5\u7c7b\u578b\u7684\u884c\u4e3a\u5b9a\u4e49\uff0c\u6211\u4eec\u5148\u7f16\u5199\u4e86\u4e00\u4e2a\u8fd9\u6837\u7684\u63a5\u53e3\uff1a<\/p>\n<pre> \/\/ \u6570\u636e\u6587\u4ef6\u7684\u63a5\u53e3\u7c7b\u578b\u3002\r\n type DataFile interface {\r\n     \/\/ \u8bfb\u53d6\u4e00\u4e2a\u6570\u636e\u5757\u3002\r\n     Read() (rsn int64, d Data, err error)\r\n     \/\/ \u5199\u5165\u4e00\u4e2a\u6570\u636e\u5757\u3002\r\n     Write(d Data) (wsn int64, err error)\r\n     \/\/ \u83b7\u53d6\u6700\u540e\u8bfb\u53d6\u7684\u6570\u636e\u5757\u7684\u5e8f\u5217\u53f7\u3002\r\n     Rsn() int64\r\n     \/\/ \u83b7\u53d6\u6700\u540e\u5199\u5165\u7684\u6570\u636e\u5757\u7684\u5e8f\u5217\u53f7\u3002\r\n     Wsn() int64\r\n     \/\/ \u83b7\u53d6\u6570\u636e\u5757\u7684\u957f\u5ea6\r\n     DataLen() uint32\r\n }<\/pre>\n<p>\u5176\u4e2d\uff0c\u7c7b\u578bData\u88ab\u58f0\u660e\u4e3a\u4e00\u4e2a[]byte\u7684\u522b\u540d\u7c7b\u578b\uff1a<\/p>\n<pre> \/\/ \u6570\u636e\u7684\u7c7b\u578b\r\n type Data []byte<\/pre>\n<p>\u800c\u540d\u79f0wsn\u548crsn\u5206\u522b\u662fWriting Serial Number\u548cReading Serial Number\u7684\u7f29\u5199\u5f62\u5f0f\u3002\u5b83\u4eec\u5206\u522b\u4ee3\u8868\u4e86\u6700\u540e\u88ab\u5199\u5165\u7684\u6570\u636e\u5757\u7684\u5e8f\u5217\u53f7\u548c\u6700\u540e\u88ab\u8bfb\u53d6\u7684\u6570\u636e\u5757\u7684\u5e8f\u5217\u53f7\u3002\u8fd9\u91cc\u6240\u8bf4\u7684\u5e8f\u5217\u53f7\u76f8\u5f53\u4e8e\u4e00\u4e2a\u8ba1\u6570\u503c\uff0c\u5b83\u4f1a\u4ece1\u5f00\u59cb\u3002\u56e0\u6b64\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u8c03\u7528Rsn\u65b9\u6cd5\u548cWsn\u65b9\u6cd5\u5f97\u5230\u5f53\u524d\u5df2\u88ab\u8bfb\u53d6\u548c\u5199\u5165\u7684\u6570\u636e\u5757\u7684\u6570\u91cf\u3002<br \/>\n\u6839\u636e\u4e0a\u9762\u5bf9\u9700\u6c42\u7684\u7b80\u5355\u5206\u6790\u548c\u8fd9\u4e2aDataFile\u63a5\u53e3\u7c7b\u578b\u58f0\u660e\uff0c\u6211\u4eec\u5c31\u53ef\u4ee5\u6765\u7f16\u5199\u771f\u6b63\u7684\u5b9e\u73b0\u4e86\u3002\u6211\u4eec\u5c06\u8fd9\u4e2a\u5b9e\u73b0\u7c7b\u578b\u547d\u540d\u4e3amyDataFile\u3002\u5b83\u7684\u57fa\u672c\u7ed3\u6784\u5982\u4e0b\uff1a<\/p>\n<pre> \/\/ \u6570\u636e\u6587\u4ef6\u7684\u5b9e\u73b0\u7c7b\u578b\u3002\r\n type myDataFile struct {\r\n     f\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 *os.File\u00a0\u00a0\u00a0\u00a0 \/\/ \u6587\u4ef6\u3002\r\n     fmutex sync.RWMutex \/\/ \u88ab\u7528\u4e8e\u6587\u4ef6\u7684\u8bfb\u5199\u9501\u3002\r\n     woffset int64\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/\/ \u5199\u64cd\u4f5c\u9700\u8981\u7528\u5230\u7684\u504f\u79fb\u91cf\u3002\r\n     roffset int64\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/\/ \u8bfb\u64cd\u4f5c\u9700\u8981\u7528\u5230\u7684\u504f\u79fb\u91cf\u3002\r\n     wmutex sync.Mutex\u00a0\u00a0 \/\/ \u5199\u64cd\u4f5c\u9700\u8981\u7528\u5230\u7684\u4e92\u65a5\u9501\u3002\r\n     rmutex sync.Mutex\u00a0\u00a0 \/\/ \u8bfb\u64cd\u4f5c\u9700\u8981\u7528\u5230\u7684\u4e92\u65a5\u9501\u3002\r\n     dataLen uint32\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/\/ \u6570\u636e\u5757\u957f\u5ea6\u3002\r\n }<\/pre>\n<p>\u7c7b\u578bmyDataFile\u5171\u6709\u4e03\u4e2a\u5b57\u6bb5\u3002\u6211\u4eec\u5df2\u7ecf\u5728\u524d\u9762\u8bf4\u660e\u8fc7\u524d\u4e24\u4e2a\u5b57\u6bb5\u5b58\u5728\u7684\u610f\u4e49\u3002\u7531\u4e8e\u5bf9\u6570\u636e\u6587\u4ef6\u7684\u5199\u64cd\u4f5c\u548c\u8bfb\u64cd\u4f5c\u662f\u5404\u81ea\u72ec\u7acb\u7684\uff0c\u6240\u4ee5\u6211\u4eec\u9700\u8981\u4e24\u4e2a\u5b57\u6bb5\u6765\u5b58\u50a8\u4e24\u7c7b\u64cd\u4f5c\u7684\u8fdb\u884c\u8fdb\u5ea6\u3002\u5728\u8fd9\u91cc\uff0c\u8fd9\u4e2a\u8fdb\u5ea6\u7531\u504f\u79fb\u91cf\u4ee3\u8868\u3002\u6b64\u540e\uff0c\u6211\u4eec\u628awoffset\u5b57\u6bb5\u79f0\u4e3a\u5199\u504f\u79fb\u91cf\uff0c\u800c\u628aroffset\u5b57\u6bb5\u79f0\u4e3a\u8bfb\u504f\u79fb\u91cf\u3002\u6ce8\u610f\uff0c\u6211\u4eec\u5728\u8fdb\u884c\u5199\u64cd\u4f5c\u548c\u8bfb\u64cd\u4f5c\u7684\u65f6\u5019\u4f1a\u5206\u522b\u589e\u52a0\u8fd9\u4e24\u4e2a\u5b57\u6bb5\u7684\u503c\u3002\u5f53\u6709\u591a\u4e2a\u5199\u64cd\u4f5c\u540c\u65f6\u8981\u589e\u52a0woffset\u5b57\u6bb5\u7684\u503c\u7684\u65f6\u5019\u5c31\u4f1a\u4ea7\u751f\u7ade\u6001\u6761\u4ef6\u3002\u56e0\u6b64\uff0c\u6211\u4eec\u9700\u8981\u4e92\u65a5\u9501wmutex\u6765\u5bf9\u5176\u52a0\u4ee5\u4fdd\u62a4\u3002\u7c7b\u4f3c\u7684\uff0crmutex\u4e92\u65a5\u9501\u88ab\u7528\u6765\u6d88\u9664\u591a\u4e2a\u8bfb\u64cd\u4f5c\u540c\u65f6\u589e\u52a0roffset\u5b57\u6bb5\u7684\u503c\u65f6\u4ea7\u751f\u7684\u7ade\u6001\u6761\u4ef6\u3002\u6700\u540e\uff0c\u7531\u4e0a\u8ff0\u7684\u9700\u6c42\u53ef\u77e5\uff0c\u6570\u636e\u5757\u7684\u957f\u5ea6\u5e94\u8be5\u662f\u5728\u521d\u59cb\u5316myDataFile\u7c7b\u578b\u503c\u7684\u65f6\u5019\u88ab\u7ed9\u5b9a\u7684\u3002\u8fd9\u4e2a\u957f\u5ea6\u4f1a\u88ab\u5b58\u50a8\u5728\u8be5\u503c\u7684dataLen\u5b57\u6bb5\u4e2d\u3002\u5b83\u4e0eDataFile\u63a5\u53e3\u4e2d\u58f0\u660e\u7684DataLen\u65b9\u6cd5\u662f\u5bf9\u5e94\u7684\u3002\u4e0b\u9762\u6211\u4eec\u5c31\u6765\u770b\u770b\u88ab\u7528\u6765\u521b\u5efa\u548c\u521d\u59cb\u5316DataFile\u7c7b\u578b\u503c\u7684\u51fd\u6570NewDataFile\u3002<br \/>\n\u5173\u4e8e\u8fd9\u7c7b\u51fd\u6570\u7684\u7f16\u5199\uff0c\u8bfb\u8005\u5e94\u8be5\u5df2\u7ecf\u9a7e\u8f7b\u5c31\u719f\u4e86\u3002NewDataFile\u51fd\u6570\u4f1a\u8fd4\u56de\u4e00\u4e2aDataFile\u7c7b\u578b\u503c\uff0c\u4f46\u662f\u5b9e\u9645\u4e0a\u5b83\u4f1a\u521b\u5efa\u5e76\u521d\u59cb\u5316\u4e00\u4e2a*myDataFile\u7c7b\u578b\u7684\u503c\u5e76\u628a\u5b83\u4f5c\u4e3a\u5b83\u7684\u7ed3\u679c\u503c\u3002\u8fd9\u6837\u53ef\u4ee5\u901a\u8fc7\u7f16\u8bd1\u7684\u539f\u56e0\u662f\uff0c\u540e\u8005\u4f1a\u662f\u524d\u8005\u7684\u4e00\u4e2a\u5b9e\u73b0\u7c7b\u578b\u3002NewDataFile\u51fd\u6570\u7684\u5b8c\u6574\u58f0\u660e\u5982\u4e0b\uff1a<\/p>\n<pre> func NewDataFile(path string, dataLen uint32) (DataFile, error) {\r\n     f, err := os.Create(path)\r\n     if err != nil {\r\n         return nil, err\r\n     }\r\n     if dataLen == 0 {\r\n         return nil, errors.New(\"Invalid data length!\")\r\n     }\r\n     df := &amp;myDataFile{f: f, dataLen: dataLen}\r\n     return df, nil\r\n }<\/pre>\n<p>\u53ef\u4ee5\u770b\u5230\uff0c\u6211\u4eec\u5728\u521b\u5efa*myDataFile\u7c7b\u578b\u503c\u7684\u65f6\u5019\u53ea\u9700\u8981\u5bf9\u5176\u4e2d\u7684\u5b57\u6bb5f\u548cdataLen\u8fdb\u884c\u521d\u59cb\u5316\u3002\u8fd9\u662f\u56e0\u4e3awoffset\u5b57\u6bb5\u548croffset\u5b57\u6bb5\u7684\u96f6\u503c\u90fd\u662f0\uff0c\u800c\u5728\u672a\u8fdb\u884c\u8fc7\u5199\u64cd\u4f5c\u548c\u8bfb\u64cd\u4f5c\u7684\u65f6\u5019\u5b83\u4eec\u7684\u503c\u7406\u5e94\u5982\u6b64\u3002\u5bf9\u4e8e\u5b57\u6bb5fmutex\u3001wmutex\u548crmutex\u6765\u8bf4\uff0c\u5b83\u4eec\u7684\u96f6\u503c\u5373\u4e3a\u53ef\u7528\u7684\u9501\u3002\u6240\u4ee5\u6211\u4eec\u4e5f\u4e0d\u5fc5\u5bf9\u5b83\u4eec\u8fdb\u884c\u663e\u5f0f\u7684\u521d\u59cb\u5316\u3002<br \/>\n\u628a\u53d8\u91cfdf\u7684\u503c\u4f5c\u4e3aNewDataFile\u51fd\u6570\u7684\u7b2c\u4e00\u4e2a\u7ed3\u679c\u503c\u4f53\u73b0\u4e86\u6211\u4eec\u7684\u8bbe\u8ba1\u610f\u56fe\u3002\u4f46\u8981\u60f3\u4f7f*myDataFile\u7c7b\u578b\u771f\u6b63\u6210\u4e3aDataFile\u7c7b\u578b\u7684\u4e00\u4e2a\u5b9e\u73b0\u7c7b\u578b\uff0c\u6211\u4eec\u8fd8\u9700\u8981\u4e3a*myDataFile\u7c7b\u578b\u7f16\u5199\u51fa\u5df2\u5728DataFile\u63a5\u53e3\u7c7b\u578b\u4e2d\u58f0\u660e\u7684\u6240\u6709\u65b9\u6cd5\u3002\u5176\u4e2d\u6700\u91cd\u8981\u7684\u5f53\u5c5eRead\u65b9\u6cd5\u548cWrite\u65b9\u6cd5\u3002<br \/>\n\u6211\u4eec\u5148\u6765\u7f16\u5199*myDataFile\u7c7b\u578b\u7684Read\u65b9\u6cd5\u3002\u8be5\u65b9\u6cd5\u5e94\u8be5\u6309\u7167\u5982\u4e0b\u6b65\u9aa4\u5b9e\u73b0\u3002<br \/>\n(1) \u83b7\u53d6\u5e76\u66f4\u65b0\u8bfb\u504f\u79fb\u91cf\u3002<br \/>\n(2) \u6839\u636e\u8bfb\u504f\u79fb\u91cf\u4ece\u6587\u4ef6\u4e2d\u8bfb\u53d6\u4e00\u5757\u6570\u636e\u3002<br \/>\n(3) \u628a\u8be5\u6570\u636e\u5757\u5c01\u88c5\u6210\u4e00\u4e2aData\u7c7b\u578b\u503c\u5e76\u5c06\u5176\u4f5c\u4e3a\u7ed3\u679c\u503c\u8fd4\u56de\u3002<br \/>\n\u5176\u4e2d\uff0c\u524d\u4e00\u4e2a\u6b65\u9aa4\u5728\u88ab\u6267\u884c\u7684\u65f6\u5019\u5e94\u8be5\u7531\u4e92\u65a5\u9501rmutex\u4fdd\u62a4\u8d77\u6765\u3002\u56e0\u4e3a\uff0c\u6211\u4eec\u8981\u6c42\u591a\u4e2a\u8bfb\u64cd\u4f5c\u4e0d\u80fd\u8bfb\u53d6\u540c\u4e00\u4e2a\u6570\u636e\u5757\uff0c\u5e76\u4e14\u5b83\u4eec\u5e94\u8be5\u6309\u987a\u5e8f\u7684\u8bfb\u53d6\u6587\u4ef6\u4e2d\u7684\u6570\u636e\u5757\u3002\u800c\u7b2c\u4e8c\u4e2a\u6b65\u9aa4\uff0c\u6211\u4eec\u4e5f\u4f1a\u7528\u8bfb\u5199\u9501fmutex\u52a0\u4ee5\u4fdd\u62a4\u3002\u4e0b\u9762\u662f\u8fd9\u4e2aRead\u65b9\u6cd5\u7684\u7b2c\u4e00\u4e2a\u7248\u672c\uff1a<\/p>\n<pre> func (df *myDataFile) Read() (rsn int64, d Data, err error) {\r\n     \/\/ \u8bfb\u53d6\u5e76\u66f4\u65b0\u8bfb\u504f\u79fb\u91cf\r\n     var offset int64\r\n     df.rmutex.Lock()\r\n     offset = df.roffset\r\n     df.roffset += int64(df.dataLen)\r\n     df.rmutex.Unlock()\r\n    \/\/\u8bfb\u53d6\u4e00\u4e2a\u6570\u636e\u5757\r\n     rsn = offset \/ int64(df.dataLen)\r\n     df.fmutex.RLock()\r\n     defer df.fmutex.RUnlock()\r\n     bytes := make([]byte, df.dataLen)\r\n     _, err = df.f.ReadAt(bytes, offset)\r\n     if err != nil {\r\n         return\r\n     }\r\n     d = bytes\r\n     return\r\n }<\/pre>\n<p>\u53ef\u4ee5\u770b\u5230\uff0c\u5728\u8bfb\u53d6\u5e76\u66f4\u65b0\u8bfb\u504f\u79fb\u91cf\u7684\u65f6\u5019\uff0c\u6211\u4eec\u7528\u5230\u4e86rmutex\u5b57\u6bb5\u3002\u8fd9\u4fdd\u8bc1\u4e86\u53ef\u80fd\u540c\u65f6\u8fd0\u884c\u5728\u591a\u4e2aGoroutine\u4e2d\u7684\u8fd9\u4e24\u884c\u4ee3\u7801\uff1a<\/p>\n<pre>offset = df.roffset\r\ndf.roffset += int64(df.dataLen)<\/pre>\n<p>\u7684\u6267\u884c\u662f\u4e92\u65a5\u7684\u3002\u8fd9\u662f\u6211\u4eec\u4e3a\u4e86\u83b7\u53d6\u5230\u4e0d\u91cd\u590d\u4e14\u6b63\u786e\u7684\u8bfb\u504f\u79fb\u91cf\u6240\u5fc5\u9700\u91c7\u53d6\u7684\u63aa\u65bd\u3002<br \/>\n\u53e6\u4e00\u65b9\u9762\uff0c\u5728\u8bfb\u53d6\u4e00\u4e2a\u6570\u636e\u5757\u7684\u65f6\u5019\uff0c\u6211\u4eec\u9002\u65f6\u7684\u8fdb\u884c\u4e86fmutex\u5b57\u6bb5\u7684\u8bfb\u9501\u5b9a\u548c\u8bfb\u89e3\u9501\u64cd\u4f5c\u3002fmutex\u5b57\u6bb5\u7684\u8fd9\u4e24\u4e2a\u64cd\u4f5c\u53ef\u4ee5\u4fdd\u8bc1\u6211\u4eec\u5728\u8fd9\u91cc\u8bfb\u53d6\u5230\u7684\u662f\u5b8c\u6574\u7684\u6570\u636e\u5757\u3002\u4e0d\u8fc7\uff0c\u8fd9\u4e2a\u5b8c\u6574\u7684\u6570\u636e\u5757\u5374\u5e76\u4e0d\u4e00\u5b9a\u662f\u6b63\u786e\u7684\u3002\u4e3a\u4ec0\u4e48\u4f1a\u8fd9\u6837\u8bf4\u5462\uff1f<br \/>\n\u8bf7\u60f3\u8c61\u8fd9\u6837\u4e00\u4e2a\u573a\u666f\u3002\u5728\u6211\u4eec\u7684\u7a0b\u5e8f\u4e2d\uff0c\u67093\u4e2aGoroutine\u6765\u5e76\u53d1\u7684\u6267\u884c\u67d0\u4e2a*myDataFile\u7c7b\u578b\u503c\u7684Read\u65b9\u6cd5\uff0c\u5e76\u67092\u4e2aGoroutine\u6765\u5e76\u53d1\u7684\u6267\u884c\u8be5\u503c\u7684Write\u65b9\u6cd5\u3002\u901a\u8fc7\u524d3\u4e2aGoroutine\u7684\u8fd0\u884c\uff0c\u6570\u636e\u6587\u4ef6\u4e2d\u7684\u6570\u636e\u5757\u88ab\u4f9d\u6b21\u7684\u8bfb\u53d6\u4e86\u51fa\u6765\u3002\u4f46\u662f\uff0c\u7531\u4e8e\u8fdb\u884c\u5199\u64cd\u4f5c\u7684Goroutine\u6bd4\u8fdb\u884c\u8bfb\u64cd\u4f5c\u7684Goroutine\u5c11\uff0c\u6240\u4ee5\u8fc7\u4e0d\u4e86\u591a\u4e45\u8bfb\u504f\u79fb\u91cfroffset\u7684\u503c\u5c31\u4f1a\u7b49\u4e8e\u751a\u81f3\u5927\u4e8e\u5199\u504f\u79fb\u91cfwoffset\u7684\u503c\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u8bfb\u64cd\u4f5c\u5f88\u5feb\u5c31\u4f1a\u6ca1\u6709\u6570\u636e\u53ef\u8bfb\u4e86\u3002\u8fd9\u79cd\u60c5\u51b5\u4f1a\u4f7f\u4e0a\u9762\u7684df.f.ReadAt\u65b9\u6cd5\u8fd4\u56de\u7684\u7b2c\u4e8c\u4e2a\u7ed3\u679c\u503c\u4e3a\u4ee3\u8868\u9519\u8bef\u7684\u975enil\u4e14\u4f1a\u4e0eio.EOF\u76f8\u7b49\u7684\u503c\u3002\u5b9e\u9645\u4e0a\uff0c\u6211\u4eec\u4e0d\u5e94\u8be5\u628a\u8fd9\u6837\u7684\u503c\u770b\u6210\u9519\u8bef\u7684\u4ee3\u8868\uff0c\u800c\u5e94\u8be5\u628a\u5b83\u770b\u6210\u4e00\u79cd\u8fb9\u754c\u60c5\u51b5\u3002\u4f46\u4e0d\u5e78\u7684\u662f\uff0c\u6211\u4eec\u5728\u8fd9\u4e2a\u7248\u672c\u7684Read\u65b9\u6cd5\u4e2d\u5e76\u6ca1\u6709\u5bf9\u8fd9\u79cd\u8fb9\u754c\u60c5\u51b5\u505a\u51fa\u6b63\u786e\u7684\u5904\u7406\u3002\u8be5\u65b9\u6cd5\u5728\u9047\u5230\u8fd9\u79cd\u60c5\u51b5\u65f6\u4f1a\u76f4\u63a5\u628a\u9519\u8bef\u503c\u8fd4\u56de\u7ed9\u5b83\u7684\u8c03\u7528\u65b9\u3002\u8be5\u8c03\u7528\u65b9\u4f1a\u5f97\u5230\u8bfb\u53d6\u51fa\u9519\u7684\u6570\u636e\u5757\u7684\u5e8f\u5217\u53f7\uff0c\u4f46\u5374\u65e0\u6cd5\u518d\u6b21\u5c1d\u8bd5\u8bfb\u53d6\u8fd9\u4e2a\u6570\u636e\u5757\u3002\u7531\u4e8e\u5176\u4ed6\u6b63\u5728\u6216\u540e\u7eed\u6267\u884c\u7684Read\u65b9\u6cd5\u4f1a\u7ee7\u7eed\u589e\u52a0\u8bfb\u504f\u79fb\u91cfroffset\u7684\u503c\uff0c\u6240\u4ee5\u5f53\u8be5\u8c03\u7528\u65b9\u518d\u6b21\u8c03\u7528\u8fd9\u4e2aRead\u65b9\u6cd5\u7684\u65f6\u5019\u53ea\u53ef\u80fd\u8bfb\u53d6\u5230\u5728\u6b64\u6570\u636e\u5757\u540e\u9762\u7684\u5176\u4ed6\u6570\u636e\u5757\u3002\u6ce8\u610f\uff0c\u6267\u884cRead\u65b9\u6cd5\u65f6\u9047\u5230\u4e0a\u8ff0\u60c5\u51b5\u7684\u6b21\u6570\u8d8a\u591a\uff0c\u88ab\u6f0f\u8bfb\u7684\u6570\u636e\u5757\u4e5f\u5c31\u4f1a\u8d8a\u591a\u3002\u4e3a\u4e86\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\uff0c\u6211\u4eec\u7f16\u5199\u4e86Read\u65b9\u6cd5\u7684\u7b2c\u4e8c\u4e2a\u7248\u672c\uff1a<\/p>\n<pre>func (df *myDataFile) Read() (rsn int64, d Data, err error) {\r\n \/\/ \u8bfb\u53d6\u5e76\u66f4\u65b0\u8bfb\u504f\u79fb\u91cf\r\n \/\/ \u7701\u7565\u82e5\u5e72\u6761\u8bed\u53e5\r\n \/\/\u8bfb\u53d6\u4e00\u4e2a\u6570\u636e\u5757\r\n rsn = offset \/ int64(df.dataLen)\r\n bytes := make([]byte, df.dataLen)\r\n for {\r\n df.fmutex.RLock()\r\n _, err = df.f.ReadAt(bytes, offset)\r\n if err != nil {\r\n if err == io.EOF {\r\n df.fmutex.RUnlock()\r\n continue\r\n }\r\n df.fmutex.RUnlock()\r\n return\r\n }\r\n d = bytes\r\n df.fmutex.RUnlock()\r\n return\r\n }\r\n }<\/pre>\n<p>\u5728\u4e0a\u9762\u7684Read\u65b9\u6cd5\u5c55\u793a\u4e2d\uff0c\u6211\u4eec\u7701\u7565\u4e86\u82e5\u5e72\u6761\u8bed\u53e5\u3002\u539f\u56e0\u5728\u8fd9\u4e2a\u4f4d\u7f6e\u4e0a\u7684\u90a3\u4e9b\u8bed\u53e5\u5e76\u6ca1\u6709\u4efb\u4f55\u53d8\u5316\u3002\u4e3a\u4e86\u8fdb\u4e00\u6b65\u8282\u7701\u7bc7\u5e45\uff0c\u6211\u4eec\u5728\u540e\u9762\u4e5f\u4f1a\u9075\u5faa\u8fd9\u6837\u7684\u7701\u7565\u539f\u5219\u3002<br \/>\n\u7b2c\u4e8c\u4e2a\u7248\u672c\u7684Read\u65b9\u6cd5\u4f7f\u7528for\u8bed\u53e5\u662f\u4e3a\u4e86\u8fbe\u5230\u8fd9\u6837\u4e00\u4e2a\u76ee\u7684\uff1a\u5728\u5176\u4e2d\u7684df.f.ReadAt\u65b9\u6cd5\u8fd4\u56deio.EOF\u9519\u8bef\u7684\u65f6\u5019\u7ee7\u7eed\u5c1d\u8bd5\u83b7\u53d6\u540c\u4e00\u4e2a\u6570\u636e\u5757\uff0c\u76f4\u5230\u83b7\u53d6\u6210\u529f\u4e3a\u6b62\u3002\u6ce8\u610f\uff0c\u5982\u679c\u5728\u8be5for\u4ee3\u7801\u5757\u88ab\u6267\u884c\u671f\u95f4\u4e00\u76f4\u8ba9\u8bfb\u5199\u9501fmutex\u5904\u4e8e\u8bfb\u9501\u5b9a\u72b6\u6001\uff0c\u90a3\u4e48\u9488\u5bf9\u5b83\u7684\u5199\u9501\u5b9a\u64cd\u4f5c\u5c06\u6c38\u8fdc\u4e0d\u4f1a\u6210\u529f\uff0c\u4e14\u76f8\u5e94\u7684Goroutine\u4e5f\u4f1a\u88ab\u4e00\u76f4\u963b\u585e\u3002\u56e0\u4e3a\u5b83\u4eec\u662f\u4e92\u65a5\u7684\u3002\u6240\u4ee5\uff0c\u6211\u4eec\u4e0d\u5f97\u4e0d\u5728\u8be5for\u8bed\u53e5\u5757\u4e2d\u7684\u6bcf\u6761return\u8bed\u53e5\u548ccontinue\u8bed\u53e5\u7684\u524d\u9762\u90fd\u52a0\u5165\u4e00\u4e2a\u9488\u5bf9\u8be5\u8bfb\u5199\u9501\u7684\u8bfb\u89e3\u9501\u64cd\u4f5c\uff0c\u5e76\u5728\u6bcf\u6b21\u8fed\u4ee3\u5f00\u59cb\u65f6\u90fd\u5bf9fmutex\u8fdb\u884c\u4e00\u6b21\u8bfb\u9501\u5b9a\u3002\u663e\u7136\uff0c\u8fd9\u6837\u7684\u4ee3\u7801\u770b\u8d77\u6765\u5f88\u4e11\u964b\u3002\u5197\u4f59\u7684\u4ee3\u7801\u4f1a\u4f7f\u4ee3\u7801\u7684\u7ef4\u62a4\u6210\u672c\u548c\u51fa\u9519\u51e0\u7387\u5927\u5927\u589e\u52a0\u3002\u5e76\u4e14\uff0c\u5f53for\u4ee3\u7801\u5757\u4e2d\u7684\u4ee3\u7801\u5f15\u53d1\u4e86\u8fd0\u884c\u65f6\u6050\u614c\u7684\u65f6\u5019\uff0c\u6211\u4eec\u662f\u5f88\u96be\u53ca\u65f6\u7684\u5bf9\u8bfb\u5199\u9501fmutex\u8fdb\u884c\u8bfb\u89e3\u9501\u7684\u3002\u5373\u4fbf\u53ef\u4ee5\u8fd9\u6837\u505a\uff0c\u90a3\u4e5f\u4f1a\u4f7fRead\u65b9\u6cd5\u7684\u5b9e\u73b0\u66f4\u52a0\u4e11\u964b\u3002\u6211\u4eec\u56e0\u4e3a\u8981\u5904\u7406\u4e00\u79cd\u8fb9\u754c\u60c5\u51b5\u800c\u53bb\u6389\u4e86defer df.fmutex.RUnlock()\u8bed\u53e5\u3002\u8fd9\u79cd\u505a\u6cd5\u5229\u5f0a\u53c2\u534a\u3002<br \/>\n\u5176\u5b9e\uff0c\u6211\u4eec\u53ef\u4ee5\u505a\u5f97\u66f4\u597d\u3002\u4f46\u662f\u8fd9\u6d89\u53ca\u5230\u4e86\u5176\u4ed6\u540c\u6b65\u5de5\u5177\u3002\u56e0\u6b64\uff0c\u6211\u4eec\u4ee5\u540e\u518d\u6765\u5bf9Read\u65b9\u6cd5\u8fdb\u884c\u8fdb\u4e00\u6b65\u7684\u6539\u9020\u3002\u987a\u4fbf\u63d0\u4e00\u53e5\uff0c\u5f53df.f.ReadAt\u65b9\u6cd5\u8fd4\u56de\u4e00\u4e2a\u975enil\u4e14\u4e0d\u7b49\u4e8eio.EOF\u7684\u9519\u8bef\u503c\u7684\u65f6\u5019\uff0c\u6211\u4eec\u603b\u662f\u5e94\u8be5\u653e\u5f03\u518d\u6b21\u83b7\u53d6\u76ee\u6807\u6570\u636e\u5757\u7684\u5c1d\u8bd5\u800c\u7acb\u5373\u5c06\u8be5\u9519\u8bef\u503c\u8fd4\u56de\u7ed9Read\u65b9\u6cd5\u7684\u8c03\u7528\u65b9\u3002\u56e0\u4e3a\u8fd9\u6837\u7684\u9519\u8bef\u5f88\u53ef\u80fd\u662f\u4e25\u91cd\u7684\uff08\u6bd4\u5982\uff0cf\u5b57\u6bb5\u4ee3\u8868\u7684\u6587\u4ef6\u88ab\u5220\u9664\u4e86\uff09\uff0c\u9700\u8981\u4ea4\u7531\u4e0a\u5c42\u7a0b\u5e8f\u53bb\u5904\u7406\u3002<br \/>\n\u73b0\u5728\uff0c\u6211\u4eec\u6765\u8003\u8651*myDataFile\u7c7b\u578b\u7684Write\u65b9\u6cd5\u3002\u4e0eRead\u65b9\u6cd5\u76f8\u6bd4\uff0cWrite\u65b9\u6cd5\u7684\u5b9e\u73b0\u4f1a\u7b80\u5355\u4e00\u4e9b\u3002\u56e0\u4e3a\u540e\u8005\u4e0d\u4f1a\u6d89\u53ca\u5230\u8fb9\u754c\u60c5\u51b5\u3002\u5728\u8be5\u65b9\u6cd5\u4e2d\uff0c\u6211\u4eec\u9700\u8981\u8fdb\u884c\u4e24\u4e2a\u6b65\u9aa4\uff0c\u5373\uff1a\u83b7\u53d6\u5e76\u66f4\u65b0\u5199\u504f\u79fb\u91cf\u548c\u5411\u6587\u4ef6\u5199\u5165\u4e00\u4e2a\u6570\u636e\u5757\u3002\u6211\u4eec\u76f4\u63a5\u7ed9\u51faWrite\u65b9\u6cd5\u7684\u5b9e\u73b0\uff1a<\/p>\n<pre>func (df *myDataFile) Write(d Data) (wsn int64, err error) {\r\n \/\/ \u8bfb\u53d6\u5e76\u66f4\u65b0\u5199\u504f\u79fb\u91cf\r\n var offset int64\r\n df.wmutex.Lock()\r\n offset = df.woffset\r\n df.woffset += int64(df.dataLen)\r\n df.wmutex.Unlock()\r\n\/\/\u5199\u5165\u4e00\u4e2a\u6570\u636e\u5757\r\n wsn = offset \/ int64(df.dataLen)\r\n var bytes []byte\r\n if len(d) &gt; int(df.dataLen) {\r\n bytes = d[0:df.dataLen]\r\n } else {\r\n bytes = d\r\n }\r\n df.fmutex.Lock()\r\n df.fmutex.Unlock()\r\n _, err = df.f.Write(bytes)\r\n return\r\n }<\/pre>\n<p>\u8fd9\u91cc\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u5f53\u53c2\u6570d\u7684\u503c\u7684\u957f\u5ea6\u5927\u4e8e\u6570\u636e\u5757\u7684\u6700\u5927\u957f\u5ea6\u7684\u65f6\u5019\uff0c\u6211\u4eec\u4f1a\u5148\u8fdb\u884c\u622a\u77ed\u5904\u7406\u518d\u5c06\u6570\u636e\u5199\u5165\u6587\u4ef6\u3002\u5982\u679c\u6ca1\u6709\u8fd9\u4e2a\u622a\u77ed\u5904\u7406\uff0c\u6211\u4eec\u5728\u540e\u9762\u8ba1\u7b97\u7684\u5df2\u8bfb\u6570\u636e\u5757\u7684\u5e8f\u5217\u53f7\u548c\u5df2\u5199\u6570\u636e\u5757\u7684\u5e8f\u5217\u53f7\u5c31\u4f1a\u4e0d\u6b63\u786e\u3002<br \/>\n\u6709\u4e86\u7f16\u5199\u524d\u9762\u4e24\u4e2a\u65b9\u6cd5\u7684\u7ecf\u9a8c\uff0c\u6211\u4eec\u53ef\u4ee5\u5f88\u5bb9\u6613\u7684\u7f16\u5199\u51fa*myDataFile\u7c7b\u578b\u7684Rsn\u65b9\u6cd5\u548cWsn\u65b9\u6cd5\uff1a<\/p>\n<pre>func (df *myDataFile) Rsn() int64 {\r\n df.rmutex.Lock()\r\n defer df.rmutex.Unlock()\r\n return df.roffset \/ int64(df.dataLen)\r\n }\r\n func (df *myDataFile) Wsn() int64 {\r\n df.wmutex.Lock()\r\n defer df.wmutex.Unlock()\r\n return df.woffset \/ int64(df.dataLen)\r\n }<\/pre>\n<p>\u8fd9\u4e24\u4e2a\u65b9\u6cd5\u7684\u5b9e\u73b0\u5206\u522b\u6d89\u53ca\u5230\u4e86\u5bf9\u4e92\u65a5\u9501rmutex\u548cwmutex\u7684\u9501\u5b9a\u64cd\u4f5c\u3002\u540c\u65f6\uff0c\u6211\u4eec\u4e5f\u901a\u8fc7\u4f7f\u7528defer\u8bed\u53e5\u4fdd\u8bc1\u4e86\u5bf9\u5b83\u4eec\u7684\u53ca\u65f6\u89e3\u9501\u3002\u5728\u8fd9\u91cc\uff0c\u6211\u4eec\u5bf9\u5df2\u8bfb\u6570\u636e\u5757\u7684\u5e8f\u5217\u53f7rsn\u548c\u5df2\u5199\u6570\u636e\u5757\u7684\u5e8f\u5217\u53f7wsn\u7684\u8ba1\u7b97\u65b9\u6cd5\u4e0e\u524d\u9762\u793a\u4f8b\u4e2d\u7684\u65b9\u6cd5\u662f\u76f8\u540c\u7684\u3002\u5b83\u4eec\u90fd\u662f\u7528\u76f8\u5173\u7684\u504f\u79fb\u91cf\u9664\u4ee5\u6570\u636e\u5757\u957f\u5ea6\u540e\u5f97\u5230\u7684\u5546\u6765\u4f5c\u4e3a\u76f8\u5e94\u7684\u5e8f\u5217\u53f7\uff08\u6216\u8005\u8bf4\u8ba1\u6570\uff09\u7684\u503c\u3002<br \/>\n\u81f3\u4e8e*myDataFile\u7c7b\u578b\u7684DataLen\u65b9\u6cd5\u7684\u5b9e\u73b0\uff0c\u6211\u4eec\u65e0\u9700\u5448\u73b0\u3002\u5b83\u53ea\u662f\u7b80\u5355\u5730\u5c06dataLen\u5b57\u6bb5\u7684\u503c\u4f5c\u4e3a\u5176\u7ed3\u679c\u503c\u8fd4\u56de\u800c\u5df2\u3002<br \/>\n\u7f16\u5199\u4e0a\u9762\u8fd9\u4e2a\u5b8c\u6574\u793a\u4f8b\u7684\u4e3b\u8981\u76ee\u7684\u662f\u5c55\u793a\u4e92\u65a5\u9501\u548c\u8bfb\u5199\u9501\u5728\u5b9e\u9645\u573a\u666f\u4e2d\u7684\u5e94\u7528\u3002\u7531\u4e8e\u8fd8\u6ca1\u6709\u8bb2\u5230Go\u8bed\u8a00\u63d0\u4f9b\u7684\u5176\u4ed6\u540c\u6b65\u5de5\u5177\uff0c\u6240\u4ee5\u6211\u4eec\u5728\u76f8\u5173\u65b9\u6cd5\u4e2d\u6240\u6709\u9700\u8981\u540c\u6b65\u7684\u5730\u65b9\u90fd\u662f\u7528\u9501\u6765\u5b9e\u73b0\u7684\u3002\u7136\u800c\uff0c\u5176\u4e2d\u7684\u4e00\u4e9b\u95ee\u9898\u7528\u9501\u6765\u89e3\u51b3\u662f\u4e0d\u8db3\u591f\u6216\u4e0d\u5408\u9002\u7684\u3002\u6211\u4eec\u4f1a\u5728\u672c\u8282\u7684\u540e\u7eed\u90e8\u5206\u4e2d\u9010\u6b65\u7684\u5bf9\u5b83\u4eec\u8fdb\u884c\u6539\u8fdb\u3002<br \/>\n\u4ece\u8fd9\u4e24\u79cd\u9501\u7684\u6e90\u7801\u4e2d\u53ef\u4ee5\u770b\u51fa\uff0c\u5b83\u4eec\u662f\u540c\u6e90\u7684\u3002\u8bfb\u5199\u9501\u7684\u5185\u90e8\u662f\u7528\u4e92\u65a5\u9501\u6765\u5b9e\u73b0\u5199\u9501\u5b9a\u64cd\u4f5c\u4e4b\u95f4\u7684\u4e92\u65a5\u7684\u3002\u6211\u4eec\u53ef\u4ee5\u628a\u8bfb\u5199\u9501\u770b\u505a\u662f\u4e92\u65a5\u9501\u7684\u4e00\u79cd\u6269\u5c55\u3002\u9664\u6b64\u4e4b\u5916\uff0c\u8fd9\u4e24\u79cd\u9501\u5b9e\u73b0\u5728\u5185\u90e8\u90fd\u7528\u5230\u4e86\u64cd\u4f5c\u7cfb\u7edf\u63d0\u4f9b\u7684\u540c\u6b65\u5de5\u5177\u2014\u2014\u4fe1\u53f7\u706f\u3002\u4e92\u65a5\u9501\u5185\u90e8\u4f7f\u7528\u4e00\u4e2a\u4e8c\u503c\u4fe1\u53f7\u706f\uff08\u53ea\u6709\u4e24\u4e2a\u53ef\u80fd\u7684\u503c\u7684\u4fe1\u53f7\u706f\uff09\u6765\u5b9e\u73b0\u9501\u5b9a\u64cd\u4f5c\u4e4b\u95f4\u7684\u4e92\u65a5\uff0c\u800c\u8bfb\u5199\u9501\u5185\u90e8\u5219\u4f7f\u7528\u4e00\u4e2a\u4e8c\u503c\u4fe1\u53f7\u706f\u548c\u4e00\u4e2a\u591a\u503c\u4fe1\u53f7\u706f\uff08\u53ef\u4ee5\u6709\u591a\u4e2a\u53ef\u80fd\u7684\u503c\u7684\u4fe1\u53f7\u706f\uff09\u6765\u5b9e\u73b0\u5199\u9501\u5b9a\u64cd\u4f5c\u4e0e\u8bfb\u9501\u5b9a\u64cd\u4f5c\u4e4b\u95f4\u7684\u4e92\u65a5\u3002\u5f53\u7136\uff0c\u4e3a\u4e86\u8fdb\u884c\u7cbe\u786e\u7684\u534f\u8c03\uff0c\u5b83\u4eec\u8fd8\u4f7f\u7528\u5230\u4e86\u5176\u4ed6\u4e00\u4e9b\u5b57\u6bb5\u548c\u53d8\u91cf\u3002\u7531\u4e8e\u7bc7\u5e45\u539f\u56e0\uff0c\u6211\u4eec\u5c31\u4e0d\u5728\u8fd9\u91cc\u8d58\u8ff0\u4e86\u3002\u5982\u679c\u8bfb\u8005\u5bf9\u6b64\u611f\u5174\u8da3\u7684\u8bdd\uff0c\u53ef\u4ee5\u53bb\u9605\u8bfbsync\u4ee3\u7801\u5305\u4e2d\u7684\u76f8\u5173\u6e90\u7801\u6587\u4ef6\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728\u672c\u8282\uff0c\u6211\u4eec\u5bf9Go\u8bed\u8a00\u6240\u63d0\u4f9b\u7684\u4e0e\u9501\u6709\u5173\u7684API\u8fdb\u884c\u8bf4\u660e\u3002\u8fd9\u5305\u62ec\u4e86\u4e92\u65a5\u9501\u548c\u8bfb\u5199\u9501\u3002\u6211\u4eec\u5728\u7b2c6\u7ae0\u63cf\u8ff0\u8fc7\u4e92\u65a5\u9501\uff0c\u4f46\u5374\u6ca1\u6709\u63d0\u5230\u8fc7\u8bfb\u5199\u9501\u3002\u8fd9\u4e24\u79cd\u9501\u5bf9\u4e8e\u4f20\u7edf\u7684\u5e76\u53d1\u7a0b\u5e8f\u6765\u8bf4\u90fd\u662f\u975e\u5e38\u5e38\u7528\u548c\u91cd\u8981\u7684\u3002 &nbsp; \u4e00\u3001\u4e92\u65a5\u9501 \u4e92\u65a5\u9501\u662f\u4f20\u7edf\u7684\u5e76\u53d1\u7a0b\u5e8f\u5bf9\u5171\u4eab\u8d44\u6e90\u8fdb\u884c\u8bbf\u95ee\u63a7\u5236\u7684\u4e3b\u8981\u624b\u6bb5\u3002\u5b83\u7531\u6807\u51c6\u5e93\u4ee3\u7801\u5305sync\u4e2d\u7684Mutex\u7ed3\u6784\u4f53\u7c7b\u578b\u4ee3\u8868\u3002sync.Mutex\u7c7b\u578b\uff08\u786e\u5207\u5730\u8bf4\uff0c\u662f*sync.Mutex\u7c7b\u578b\uff09\u53ea\u6709\u4e24\u4e2a\u516c\u5f00\u65b9\u6cd5\u2014\u2014Lock\u548cUnlock\u3002\u987e\u540d\u601d\u4e49\uff0c\u524d\u8005\u88ab\u7528\u4e8e\u9501\u5b9a\u5f53\u524d\u7684\u4e92\u65a5\u91cf\uff0c\u800c\u540e\u8005\u5219\u88ab\u7528\u6765\u5bf9\u5f53\u524d\u7684\u4e92\u65a5\u91cf\u8fdb\u884c\u89e3\u9501\u3002 \u7c7b\u578bsync.Mutex\u7684\u96f6\u503c\u8868\u793a\u4e86\u672a\u88ab\u9501\u5b9a\u7684\u4e92\u65a5\u91cf\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u5b83\u662f\u4e00\u4e2a\u5f00\u7bb1\u5373\u7528\u7684\u5de5\u5177\u3002\u6211\u4eec\u53ea\u9700\u5bf9\u5b83\u8fdb\u884c\u7b80\u5355\u58f0\u660e\u5c31\u53ef\u4ee5\u6b63\u5e38\u4f7f\u7528\u4e86\uff0c\u5c31\u50cf\u8fd9\u6837\uff1a var mutex sync.Mutex mutex.Lock() \u5728\u6211\u4eec\u4f7f\u7528\u5176\u4ed6\u7f16\u7a0b\u8bed\u8a00\uff08\u6bd4\u5982C\u6216Java\uff09\u7684\u9501\u7c7b\u5de5\u5177\u7684\u65f6\u5019\uff0c\u53ef\u80fd\u4f1a\u72af\u7684\u4e00\u4e2a\u4f4e\u7ea7\u9519\u8bef\u5c31\u662f\u5fd8\u8bb0\u53ca\u65f6\u89e3\u5f00\u5df2\u88ab\u9501\u4f4f\u7684\u9501\uff0c\u4ece\u800c\u5bfc\u81f4\u8bf8\u5982\u6d41\u7a0b\u6267\u884c\u5f02\u5e38\u3001\u7ebf\u7a0b\u6267\u884c\u505c\u6ede\u751a\u81f3\u7a0b\u5e8f\u6b7b\u9501\u7b49\u7b49\u4e00\u7cfb\u5217\u95ee\u9898\u7684\u53d1\u751f\u3002\u7136\u800c\uff0c\u5728Go\u8bed\u8a00\u4e2d\uff0c\u8fd9\u4e2a\u4f4e\u7ea7\u9519\u8bef\u7684\u53d1\u751f\u51e0\u7387\u6781\u4f4e\u3002\u5176\u4e3b\u8981\u539f\u56e0\u662f\u6709defer\u8bed\u53e5\u7684\u5b58\u5728\u3002 \u6211\u4eec\u4e00\u822c\u4f1a\u5728\u9501\u5b9a\u4e92\u65a5\u9501\u4e4b\u540e\u7d27\u63a5\u7740\u5c31\u7528defer\u8bed\u53e5\u6765\u4fdd\u8bc1\u8be5\u4e92\u65a5\u9501\u7684\u53ca\u65f6\u89e3\u9501\u3002\u8bf7\u770b\u4e0b\u9762\u8fd9\u4e2a\u51fd\u6570\uff1a var mutex sync.Mutex func write() { mutex.Lock() defer mutex.Unlock() \/\/ \u7701\u7565\u82e5\u5e72\u6761\u8bed\u53e5 } \u51fd\u6570write\u4e2d\u7684\u8fd9\u6761defer\u8bed\u53e5\u4fdd\u8bc1\u4e86\u5728\u8be5\u51fd\u6570\u88ab\u6267\u884c\u7ed3\u675f\u4e4b\u524d\u4e92\u65a5\u9501mutex\u4e00\u5b9a\u4f1a\u88ab\u89e3\u9501\u3002\u8fd9\u7701\u53bb\u4e86\u6211\u4eec\u5728\u6240\u6709return\u8bed\u53e5\u4e4b\u524d\u4ee5\u53ca\u5f02\u5e38\u53d1\u751f\u4e4b\u65f6\u91cd\u590d\u7684\u9644\u52a0\u89e3\u9501\u64cd\u4f5c\u7684\u5de5\u4f5c\u3002\u5728\u51fd\u6570\u7684\u5185\u90e8\u6267\u884c\u6d41\u7a0b\u76f8\u5bf9\u590d\u6742\u7684\u60c5\u51b5\u4e0b\uff0c\u8fd9\u4e2a\u5de5\u4f5c\u91cf\u662f\u4e0d\u5bb9\u5ffd\u89c6\u7684\uff0c\u5e76\u4e14\u6781\u6613\u51fa\u73b0\u9057\u6f0f\u548c\u5bfc\u81f4\u9519\u8bef\u3002\u6240\u4ee5\uff0c\u8fd9\u91cc\u7684defer\u8bed\u53e5\u603b\u662f\u5fc5\u8981\u7684\u3002\u5728Go\u8bed\u8a00\u4e2d\uff0c\u8fd9\u662f\u5f88\u91cd\u8981\u7684\u4e00\u4e2a\u60ef\u7528\u6cd5\u3002\u6211\u4eec\u5e94\u8be5\u517b\u6210\u8fd9\u79cd\u826f\u597d\u7684\u4e60\u60ef\u3002 \u5bf9\u4e8e\u540c\u4e00\u4e2a\u4e92\u65a5\u9501\u7684\u9501\u5b9a\u64cd\u4f5c\u548c\u89e3\u9501\u64cd\u4f5c\u603b\u662f\u5e94\u8be5\u6210\u5bf9\u7684\u51fa\u73b0\u3002\u5982\u679c\u6211\u4eec\u9501\u5b9a\u4e86\u4e00\u4e2a\u5df2\u88ab\u9501\u5b9a\u7684\u4e92\u65a5\u9501\uff0c\u90a3\u4e48\u8fdb\u884c\u91cd\u590d\u9501\u5b9a\u64cd\u4f5c\u7684Goroutine\u5c06\u4f1a\u88ab\u963b\u585e\uff0c\u76f4\u5230\u8be5\u4e92\u65a5\u9501\u56de\u5230\u89e3\u9501\u72b6\u6001\u3002\u8bf7\u770b\u4e0b\u9762\u7684\u793a\u4f8b\uff1a func repeatedlyLock() { var mutex sync.Mutex fmt.Println(&#8220;Lock the lock. (G0)&#8221;) mutex.Lock() fmt.Println(&#8220;The lock is locked. (G0)&#8221;) for i := 1; i &lt;= 3; i++ { go func(i int) { fmt.Printf(&#8220;Lock [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[17],"tags":[],"class_list":["post-15521","post","type-post","status-publish","format-standard","hentry","category-docker"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/15521","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=15521"}],"version-history":[{"count":1,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/15521\/revisions"}],"predecessor-version":[{"id":15522,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/15521\/revisions\/15522"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=15521"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=15521"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=15521"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}