{"id":358,"date":"2024-10-15T18:13:11","date_gmt":"2024-10-15T10:13:11","guid":{"rendered":"https:\/\/www.zackzzp.top\/?p=358"},"modified":"2024-10-15T21:13:21","modified_gmt":"2024-10-15T13:13:21","slug":"%e4%b8%80%e6%96%87%e4%ba%86%e8%a7%a3java%e9%94%81%e6%9c%ba%e5%88%b6","status":"publish","type":"post","link":"http:\/\/www.zackzzp.top\/index.php\/2024\/10\/15\/%e4%b8%80%e6%96%87%e4%ba%86%e8%a7%a3java%e9%94%81%e6%9c%ba%e5%88%b6\/","title":{"rendered":"\u4e00\u6587\u4e86\u89e3JAVA\u9501\u673a\u5236"},"content":{"rendered":"<h2>\u4e50\u89c2\u9501\u548c\u60b2\u89c2\u9501<\/h2>\n<p>\u4e50\u89c2\u548c\u60b2\u89c2\u7684\u5b9a\u4e49\u662f\u5bf9\u4e8e\u6570\u636e\u51b2\u7a81\u7684\u6001\u5ea6\uff0c\u4e50\u89c2\u9501\u4e50\u89c2\u5730\u8ba4\u4e3a\u5e76\u53d1\u4e0d\u4f1a\u9020\u6210\u6570\u636e\u51b2\u7a81\uff0c\u60b2\u89c2\u9501\u60b2\u89c2\u7684\u8ba4\u4e3a\u5e76\u53d1\u4e00\u5b9a\u4f1a\u9020\u6210\u6570\u636e\u51b2\u7a81\u3002<\/p>\n<hr 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\/>\n<h3>\u60b2\u89c2\u9501<\/h3>\n<p>\u60b2\u89c2\u5730\u8ba4\u4e3a\u5e76\u53d1\u8bbf\u95ee\u4f1a\u9020\u6210\u6570\u636e\u51b2\u7a81\uff0c\u56e0\u6b64\u5728\u8bbf\u95ee\u5171\u4eab\u8d44\u6e90\u4e4b\u524d\u5c31\u4f1a\u8fdb\u884c\u52a0\u9501\uff0c\u786e\u4fdd\u540c\u4e00\u65f6\u523b\u53ea\u6709\u4e00\u4e2a\u7ebf\u7a0b\u80fd\u591f\u8bbf\u95ee\u3002<\/p>\n<p>\u9002\u7528\u573a\u666f\uff1a\u9002\u7528\u4e8e\u9ad8\u5e76\u53d1\u3001\u5199\u591a\u7684\u573a\u666f\uff0c\u901a\u8fc7\u52a0\u9501\u4fdd\u62a4\u5171\u4eab\u8d44\u6e90\uff0c\u786e\u4fdd\u5e76\u53d1\u8bbf\u95ee\u65f6\u4e0d\u4f1a\u9020\u6210\u6570\u636e\u4e0d\u4e00\u81f4\u6027\u3002<\/p>\n<p>java\u4e2d\u5e38\u89c1\u60b2\u89c2\u9501\u5b9e\u73b0\uff1asynchronized \u5173\u952e\u5b57\u3001ReentrantLock\uff08\u53ef\u91cd\u5165\u9501\uff09<\/p>\n<p>mysql\u4e2d\u5b9e\u73b0\u60b2\u89c2\u9501\uff1aSELECT &#8230; FOR UPDATE\u3001 SELECT &#8230; LOCK IN SHARE MODE<\/p>\n<hr \/>\n<h3>\u4e50\u89c2\u9501ABA\u95ee\u9898<\/h3>\n<p>\u5047\u8bbe\u6211\u4eec\u6709\u4e00\u4e2a\u94f6\u884c\u8d26\u6237\u7684\u5e76\u53d1\u64cd\u4f5c\u573a\u666f\uff0c\u5176\u4e2d\u8d26\u6237\u4f59\u989d\u521d\u59cb\u4e3a100\u5143\u3002\u73b0\u5728\u6709\u4e24\u4e2a\u5e76\u53d1\u7ebf\u7a0bA\u548cB\u540c\u65f6\u5c1d\u8bd5\u4ece\u8be5\u8d26\u6237\u4e2d\u53d6\u51fa50\u5143\u3002<\/p>\n<p>1.\u7ebf\u7a0bA\u7684\u64cd\u4f5c\uff1a<\/p>\n<p>\u7ebf\u7a0bA\u9996\u5148\u8bfb\u53d6\u8d26\u6237\u4f59\u989d\uff0c\u5f97\u5230100\u5143\uff08\u6b64\u65f6V=100\uff0cA=100\uff09\u3002<br \/>\u7ebf\u7a0bA\u8ba1\u5212\u6267\u884cCAS\u64cd\u4f5c\uff0c\u5c06\u4f59\u989d\u4ece100\u5143\u51cf\u81f350\u5143\uff08B=50\uff09\u3002<br \/>\u4f46\u5728\u7ebf\u7a0bA\u7b49\u5f85\u6267\u884cCAS\u64cd\u4f5c\u7684\u8fc7\u7a0b\u4e2d\uff0c\u7ebf\u7a0bB\u4ecb\u5165\u4e86\u3002<\/p>\n<p>2.\u7ebf\u7a0bB\u7684\u64cd\u4f5c\uff1a<\/p>\n<p>\u7ebf\u7a0bB\u4e5f\u8bfb\u53d6\u8d26\u6237\u4f59\u989d\uff0c\u5f97\u5230100\u5143\uff08\u6b64\u65f6V\u3001A\u4ecd\u4e3a100\uff0c\u4f46A\u5bf9\u4e8e\u7ebf\u7a0bB\u6765\u8bf4\u662f\u65b0\u7684\u8bfb\u53d6\u503c\uff09\u3002<br \/>\u7ebf\u7a0bB\u6210\u529f\u6267\u884cCAS\u64cd\u4f5c\uff0c\u5c06\u4f59\u989d\u4ece100\u5143\u51cf\u81f350\u5143\uff08B=50\uff0c\u64cd\u4f5c\u6210\u529f\uff0c\u6b64\u65f6V=50\uff09\u3002<br \/>\u5047\u8bbe\u6b64\u65f6\u6709\u53e6\u4e00\u4e2a\u64cd\u4f5c\uff08\u5982\u5b58\u6b3e\uff09\u5c06\u8d26\u6237\u4f59\u989d\u91cd\u65b0\u52a0\u81f3100\u5143\u3002<\/p>\n<p>3.\u7ebf\u7a0bA\u7ee7\u7eed\u6267\u884c\uff1a<\/p>\n<p>\u5f53\u7ebf\u7a0bA\u7ee7\u7eed\u6267\u884c\u5176CAS\u64cd\u4f5c\u65f6\uff0c\u5b83\u53d1\u73b0\u8d26\u6237\u4f59\u989d\u4ecd\u7136\u662f100\u5143\uff08V=100\uff0c\u4e0e A\u76f8\u7b49\uff09\uff0c\u56e0\u6b64CAS\u64cd\u4f5c\u6210\u529f\u6267\u884c\u3002<br \/>\u7ed3\u679c\u662f\u8d26\u6237\u4f59\u989d\u4ece100\u5143\u518d\u6b21\u51cf\u81f350\u5143\uff0c\u4f46\u5b9e\u9645\u4e0a\u5e94\u8be5\u53ea\u51cf\u5c11\u4e00\u6b21\u3002<\/p>\n<p>ABA\u95ee\u9898\u7684\u672c\u8d28<\/p>\n<p>\u5728\u4e0a\u8ff0\u793a\u4f8b\u4e2d\uff0c\u867d\u7136\u8d26\u6237\u4f59\u989d\u7684\u503c\uff08100\u5143\uff09\u5728\u7ebf\u7a0bA\u7684CAS\u64cd\u4f5c\u524d\u540e\u4fdd\u6301\u4e0d\u53d8\uff0c\u4f46\u5b9e\u9645\u4e0a\u5b83\u5df2\u7ecf\u88ab\u7ebf\u7a0bB\u4fee\u6539\u8fc7\uff08\u4ece100\u5143\u51cf\u81f350\u5143\uff0c\u7136\u540e\u53c8\u52a0\u56de100\u5143\uff09\u3002\u8fd9\u5c31\u662f\u6240\u8c13\u7684ABA\u95ee\u9898\uff1a\u503cA\u88ab\u4fee\u6539\u4e3aB\uff0c\u7136\u540e\u53c8\u6539\u56deA\uff0c\u4f46CAS\u64cd\u4f5c\u65e0\u6cd5\u68c0\u6d4b\u5230\u8fd9\u79cd\u4e2d\u95f4\u72b6\u6001\u7684\u53d8\u5316\u3002<\/p>\n<p>\u89e3\u51b3ABA\u95ee\u9898<\/p>\n<p>\u89e3\u51b3ABA\u95ee\u9898\u7684\u4e00\u79cd\u5e38\u89c1\u65b9\u6cd5\u662f\u4f7f\u7528\u5e26\u6709\u7248\u672c\u53f7\u7684\u539f\u5b50\u5f15\u7528\u7c7b\uff08\u5982Java\u4e2d\u7684AtomicStampedReference\uff09\u3002\u8fd9\u7c7b\u539f\u5b50\u5f15\u7528\u7c7b\u5728\u5b58\u50a8\u503c\u65f6\uff0c\u8fd8\u4f1a\u9644\u5e26\u4e00\u4e2a\u7248\u672c\u53f7\u3002\u6bcf\u6b21\u503c\u88ab\u4fee\u6539\u65f6\uff0c\u7248\u672c\u53f7\u4e5f\u4f1a\u9012\u589e\u3002\u8fd9\u6837\uff0c\u5728CAS\u64cd\u4f5c\u65f6\uff0c\u4e0d\u4ec5\u9700\u8981\u6bd4\u8f83\u503c\u662f\u5426\u76f8\u7b49\uff0c\u8fd8\u9700\u8981\u6bd4\u8f83\u7248\u672c\u53f7\u662f\u5426\u4e00\u81f4\u3002\u5982\u679c\u7248\u672c\u53f7\u4e0d\u4e00\u81f4\uff0c\u5219\u8bf4\u660e\u8be5\u503c\u5728\u4e2d\u95f4\u5df2\u7ecf\u88ab\u5176\u4ed6\u7ebf\u7a0b\u4fee\u6539\u8fc7\uff0c\u6b64\u65f6CAS\u64cd\u4f5c\u5e94\u5931\u8d25\u3002<\/p>\n<p>\u4e3a\u4e86\u89e3\u51b3ABA\u95ee\u9898\uff0c\u4e00\u79cd\u5e38\u89c1\u7684\u65b9\u6cd5\u662f\u4f7f\u7528\u7248\u672c\u53f7\uff08Version Numbering\uff09\u6216\u8005\u65f6\u95f4\u6233\uff08Timestamp\uff09\u6765\u6807\u8bb0\u5171\u4eab\u53d8\u91cf\u7684\u53d8\u5316\u6b21\u6570\uff0c\u6bcf\u6b21\u4fee\u6539\u5171\u4eab\u53d8\u91cf\u65f6\u90fd\u66f4\u65b0\u7248\u672c\u53f7\u6216\u65f6\u95f4\u6233\uff0c\u8fd9\u6837\u5c31\u80fd\u591f\u907f\u514d\u56e0\u4e3a\u5171\u4eab\u53d8\u91cf\u7684\u6570\u503c\u76f8\u540c\u800c\u5bfc\u81f4\u7684\u8bef\u5224\u3002\u53e6\u5916\uff0cJava\u4e2d\u7684AtomicStampedReference\u7c7b\u53ef\u4ee5\u7528\u4e8e\u89e3\u51b3ABA\u95ee\u9898\uff0c\u5b83\u901a\u8fc7\u5f15\u5165\u4e00\u4e2a\u6807\u8bb0\u6765\u533a\u5206\u4e0d\u540c\u7684\u4fee\u6539\u6b21\u6570\uff0c\u4ece\u800c\u907f\u514d\u4e86\u4f20\u7edfCAS\u64cd\u4f5c\u53ef\u80fd\u51fa\u73b0\u7684ABA\u95ee\u9898\u3002<\/p>\n<hr \/>\n<h3>\u60b2\u89c2\u9501\u548c\u4e50\u89c2\u9501\u6bd4\u8f83<\/h3>\n<p>\u76f8\u5bf9\u800c\u8a00\uff0c\u60b2\u89c2\u9501\u9002\u7528\u4e8e\u9ad8\u5e76\u53d1\uff0c\u4e50\u89c2\u9501\u9002\u7528\u4e8e\u4f4e\u5e76\u53d1<br 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\/>\u9501\u5347\u7ea7\u662fJVM\u81ea\u52a8\u8fdb\u884c\u7ba1\u7406\u7684\u3002\u5f53JVM\u68c0\u6d4b\u5230\u591a\u4e2a\u7ebf\u7a0b\u5bf9\u540c\u6b65\u4ee3\u7801\u5757\u7684\u7ade\u4e89\u65f6\uff0c\u4f1a\u6839\u636e\u5b9e\u9645\u60c5\u51b5\u81ea\u52a8\u8fdb\u884c\u9501\u7684\u5347\u7ea7\u3002\u8fd9\u79cd\u9501\u5347\u7ea7\u7684\u673a\u5236\u662f\u4e3a\u4e86\u5728\u591a\u7ebf\u7a0b\u7ade\u4e89\u60c5\u51b5\u4e0b\u4fdd\u8bc1\u7a0b\u5e8f\u7684\u5b89\u5168\u548c\u6548\u7387\uff0c\u4ee5\u53ca\u5728\u4e0d\u540c\u7ebf\u7a0b\u7ade\u4e89\u7a0b\u5ea6\u4e0b\u9009\u62e9\u5408\u9002\u7684\u9501\u72b6\u6001\uff0c\u4ece\u800c\u6700\u5927\u9650\u5ea6\u5730\u63d0\u9ad8\u5e76\u53d1\u6027\u80fd\u3002<\/p>\n<h3>\u504f\u5411\u9501\uff1a<\/h3>\n<p><br \/>\u7528\u4e8e\u5904\u7406\u53ea\u6709\u4e00\u4e2a\u7ebf\u7a0b\u8bbf\u95ee\u540c\u6b65\u5757\u7684\u60c5\u51b5\uff0c\u51cf\u5c11\u4e0d\u5fc5\u8981\u7684\u7ade\u4e89\u3002<br \/>\u504f\u5411\u9501\u9700\u8981\u5728\u5bf9\u8c61\u5934\u4e2d\u8bb0\u5f55\u6301\u6709\u504f\u5411\u9501\u7684\u7ebf\u7a0bID\uff0c\u907f\u514d\u91cd\u590d\u7684CAS\u64cd\u4f5c\u3002<br \/>\u9002\u7528\u4e8e\u53ea\u6709\u4e00\u4e2a\u7ebf\u7a0b\u6267\u884c\u540c\u6b65\u5757\u7684\u60c5\u51b5\uff0c\u4ece\u800c\u51cf\u5c11\u4e0d\u5fc5\u8981\u7684\u540c\u6b65\u64cd\u4f5c\u3002\u4e0d\u7528\u53bb\u52a0\u9501\u91ca\u653e\u9501\u3002<\/p>\n<h3>\u8f7b\u91cf\u7ea7\u9501\uff1a<\/h3>\n<p><br \/>\u9002\u7528\u4e8e\u77ed\u65f6\u95f4\u5185\u53ea\u6709\u5c11\u91cf\u7ebf\u7a0b\u7ade\u4e89\u540c\u6b65\u5757\u7684\u60c5\u51b5\u3002<br \/>\u4f7f\u7528CAS\u64cd\u4f5c\u5c1d\u8bd5\u83b7\u53d6\u9501\uff0c\u907f\u514d\u4e86\u4f20\u7edf\u9501\uff08\u4e92\u65a5\u9501\uff09\u7684\u6027\u80fd\u5f00\u9500\u3002<br \/>\u5728\u5c11\u91cf\u7ebf\u7a0b\u7ade\u4e89\u60c5\u51b5\u4e0b\uff0c\u907f\u514d\u4e86\u4f20\u7edf\u9501\u7684\u91cd\u91cf\u7ea7\u5316\uff0c\u63d0\u9ad8\u4e86\u6027\u80fd\u3002<\/p>\n<h3>\u91cd\u91cf\u7ea7\u9501\uff1a<\/h3>\n<p><br \/>\u5f53\u9501\u5b58\u5728\u5927\u91cf\u7684\u7ebf\u7a0b\u7ade\u4e89\u65f6\u4f1a\u5347\u7ea7\u4e3a\u91cd\u91cf\u7ea7\u9501\uff0c\u91c7\u7528\u4f20\u7edf\u7684\u4e92\u65a5\u9501\u5b9e\u73b0\u3002<br \/>\u4fdd\u8bc1\u4e86\u7ebf\u7a0b\u95f4\u6570\u636e\u540c\u6b65\u548c\u4e92\u65a5\u8bbf\u95ee\uff0c\u4f46\u6027\u80fd\u5f00\u9500\u76f8\u5bf9\u8f83\u5927\u3002<\/p>\n<p>\u504f\u5411\u9501\u5347\u7ea7\u4e3a\u8f7b\u91cf\u7ea7\u9501\uff1a<br \/>\u5f53\u591a\u4e2a\u7ebf\u7a0b\u8bbf\u95ee\u540c\u6b65\u5757\u65f6\uff0c\u504f\u5411\u9501\u4f1a\u5347\u7ea7\u4e3a\u8f7b\u91cf\u7ea7\u9501\u3002\u8fd9\u65f6\uff0c\u4f1a\u4f7f\u7528CAS\uff08Compare And Swap\uff09\u64cd\u4f5c\u6765\u5c1d\u8bd5\u83b7\u53d6\u9501\uff0c\u5982\u679c\u6210\u529f\u83b7\u53d6\u9501\uff0c\u5219\u8868\u793a\u5904\u4e8e\u8f7b\u91cf\u7ea7\u9501\u72b6\u6001\u3002<\/p>\n<p>\u8f7b\u91cf\u7ea7\u9501\u5347\u7ea7\u4e3a\u91cd\u91cf\u7ea7\u9501\uff1a<br \/>\u5982\u679c\u8f7b\u91cf\u7ea7\u9501\u83b7\u53d6\u5931\u8d25\uff0c\u5c31\u4f1a\u5347\u7ea7\u4e3a\u91cd\u91cf\u7ea7\u9501\u3002\u8fd9\u65f6\uff0c\u4f1a\u4f7f\u7528\u4f20\u7edf\u7684\u4e92\u65a5\u9501\u673a\u5236\u6765\u786e\u4fdd\u7ebf\u7a0b\u95f4\u7684\u4e92\u65a5\u8bbf\u95ee\u3002<\/p>\n<h3>\u516c\u5e73\u9501<\/h3>\n<p><br \/>\u516c\u5e73\u9501\u5219\u6309\u7167\u8bf7\u6c42\u9501\u7684\u987a\u5e8f\u6765\u83b7\u53d6\u9501\uff0c\u4e0d\u5141\u8bb8\u63d2\u961f\uff0c\u5373\u7b49\u5f85\u65f6\u95f4\u6700\u957f\u7684\u7ebf\u7a0b\u4f1a\u4f18\u5148\u83b7\u5f97\u9501\u3002<\/p>\n<h3>\u975e\u516c\u5e73\u9501<\/h3>\n<p><br \/>\u975e\u516c\u5e73\u9501\u5141\u8bb8\u62a2\u5360\uff0c\u5373\u5141\u8bb8\u5728\u7b49\u5f85\u961f\u5217\u4e2d\u7684\u7ebf\u7a0b\u968f\u673a\u83b7\u53d6\u9501\uff0csynchronized \u5173\u952e\u5b57\u662f\u975e\u516c\u5e73\u9501<\/p>\n<p>\u5728 Java \u4e2d\uff0cReentrantLock \u662f\u53ef\u91cd\u5165\u9501\u7684\u4e00\u79cd\u5b9e\u73b0\uff0c\u901a\u8fc7\u4f7f\u7528 ReentrantLock \u7c7b\uff0c\u53ef\u4ee5\u6839\u636e\u6784\u9020\u51fd\u6570\u7684\u4e0d\u540c\u53c2\u6570\u9009\u62e9\u662f\u516c\u5e73\u9501\u8fd8\u662f\u975e\u516c\u5e73\u9501\u3002<br \/><br \/><\/p>\n<pre class=\"code\">ReentrantLock fairLock = new ReentrantLock(true); \/\/ \u521b\u5efa\u4e00\u4e2a\u516c\u5e73\u9501\nReentrantLock unfairLock = new ReentrantLock(false); \/\/ \u521b\u5efa\u4e00\u4e2a\u975e\u516c\u5e73\u9501\n\u00a0<\/pre>\n<h3><br \/>\u53ef\u91cd\u5165\u9501<\/h3>\n<p>\u53ef\u91cd\u5165\u9501\u662f\u4e00\u79cd\u5141\u8bb8\u540c\u4e00\u4e2a\u7ebf\u7a0b\u591a\u6b21\u83b7\u53d6\u540c\u4e00\u628a\u9501\u7684\u9501\u3002\u5f53\u7ebf\u7a0b\u7b2c\u4e00\u6b21\u83b7\u53d6\u9501\u540e\uff0c\u518d\u6b21\u5c1d\u8bd5\u83b7\u53d6\u8be5\u9501\u65f6\uff0c\u4e5f\u4f1a\u6210\u529f\u83b7\u53d6\u800c\u4e0d\u4f1a\u88ab\u963b\u585e\uff0c\u8fd9\u6837\u53ef\u4ee5\u907f\u514d\u6b7b\u9501\u60c5\u51b5\u7684\u53d1\u751f\u3002Java \u4e2d\u7684 ReentrantLock \u3001synchronized \u5c31\u662f\u4e00\u79cd\u53ef\u91cd\u5165\u9501\u7684\u5b9e\u73b0\u3002<\/p>\n<p><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/img.picgo.net\/2024\/10\/15\/imageba8e5c8678f1fdf7.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/img.picgo.net\/2024\/10\/15\/imageba8e5c8678f1fdf7.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"image\" border=\"0\" \/><\/div><\/p>\n<h3>\u4e0d\u53ef\u91cd\u5165\u9501<\/h3>\n<p>\u4e0d\u53ef\u91cd\u5165\u9501\u662f\u4e00\u79cd\u4e0d\u5141\u8bb8\u540c\u4e00\u4e2a\u7ebf\u7a0b\u591a\u6b21\u83b7\u53d6\u540c\u4e00\u628a\u9501\u7684\u9501\u3002\u5982\u679c\u4e00\u4e2a\u7ebf\u7a0b\u5df2\u7ecf\u83b7\u53d6\u4e86\u8be5\u9501\uff0c\u518d\u6b21\u5c1d\u8bd5\u83b7\u53d6\u65f6\u4f1a\u88ab\u963b\u585e\uff0c\u5373\u4f7f\u662f\u540c\u4e00\u4e2a\u7ebf\u7a0b\u4e5f\u4e0d\u80fd\u518d\u6b21\u83b7\u53d6\u8fd9\u628a\u9501\uff0c\u8fd9\u53ef\u80fd\u4f1a\u5bfc\u81f4\u6b7b\u9501\u60c5\u51b5\u3002<\/p>\n<p><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/img.picgo.net\/2024\/10\/15\/imaged9ba701f8d61fbca.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/img.picgo.net\/2024\/10\/15\/imaged9ba701f8d61fbca.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"image\" border=\"0\" \/><\/div><\/p>\n<h3>\u5355\u673a\u9501<\/h3>\n<p>\u5355\u673a\u9501\u662f\u6307\u5728\u5355\u4e2a\u8ba1\u7b97\u673a\u6216\u5355\u4e2a\u8fdb\u7a0b\u4e2d\u63a7\u5236\u5bf9\u5171\u4eab\u8d44\u6e90\u7684\u8bbf\u95ee\u7684\u9501\u3002\u5e38\u89c1\u7684\u5355\u673a\u9501\u5305\u62ec synchronized \u5173\u952e\u5b57\u3001ReentrantLock \u7b49\u3002\u5355\u673a\u9501\u901a\u5e38\u53ea\u5728\u5355\u4e2a JVM \u5185\u6709\u6548\uff0c\u4e0d\u80fd\u8de8\u8d8a\u591a\u4e2a\u8ba1\u7b97\u673a\u6216\u8fdb\u7a0b\u3002 synchronized \u5173\u952e\u5b57\u6216 ReentrantLock \u90fd\u662f\u5355\u673a\u9501<\/p>\n<h3>\u5206\u5e03\u5f0f\u9501<\/h3>\n<p>\u5206\u5e03\u5f0f\u9501\u662f\u7528\u4e8e\u5728\u5206\u5e03\u5f0f\u7cfb\u7edf\u4e2d\u63a7\u5236\u5bf9\u5171\u4eab\u8d44\u6e90\u7684\u8bbf\u95ee\u7684\u9501\uff0c\u53ef\u4ee5\u8de8\u8d8a\u591a\u4e2a\u8ba1\u7b97\u673a\u6216\u8fdb\u7a0b\u3002\u5206\u5e03\u5f0f\u9501\u53ef\u4ee5\u901a\u8fc7\u57fa\u4e8e\u6570\u636e\u5e93\u3001\u57fa\u4e8e\u7f13\u5b58\uff08\u5982\u00a0<span class=\"words-blog hl-git-1\" data-tit=\"Redis\" data-pretit=\"redis\">Redis<\/span>\uff09\u3001\u57fa\u4e8e ZooKeeper \u7b49\u65b9\u5f0f\u6765\u5b9e\u73b0\u3002<\/p>\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n<h2>\u5173\u4e8e\u9501\u7684\u672c\u8d28<\/h2>\n<p>\u9996\u5148\uff0c\u9501\u7684\u672c\u8d28\uff0c\u5176\u5b9e\u5c31\u662f\u4e00\u4e2a\u6807\u8bb0\uff0c\u7136\u540e\u7ea6\u5b9a\u597d\uff1a\u6240\u6709\u7ebf\u7a0b\u5728\u8fdb\u5165\u4e34\u754c\u533a\u7684\u65f6\u5019\uff0c\u5148\u53bb\u68c0\u67e5\u9501\u7684\u72b6\u6001\uff0c\u7136\u540e\u518d\u6839\u636e\u9501\u7684\u72b6\u6001\u6765\u51b3\u5b9a\u5f53\u524d\u7ebf\u7a0b\u8be5\u600e\u4e48\u529e\uff1f<\/p>\n<p>\u6240\u4ee5\u4e0a\u9762\u6240\u6709\u7684\u9501\u7684\u6982\u5ff5\uff0c\u90fd\u65e0\u5916\u4e4e\u662f\u6839\u636e\u8fd9\u4e24\u4e2a\u6982\u5ff5\u6765\u5bf9\u9501\u8fdb\u884c\u4e86\u5206\u7c7b\uff1a<\/p>\n<p>\u9501\u6807\u5fd7\uff1a\u9501\u6807\u5fd7\u5230\u5e95\u653e\u5728\u4ec0\u4e48\u5730\u65b9\u3002mysql\u4e2d\u7684\u884c\u9501\u3001\u8868\u9501\u65e0\u975e\u5c31\u662f\u9501\u6807\u5fd7\u662f\u653e\u5728\u884c\u7ef4\u5ea6\u8fd8\u662f\u8868\u7ef4\u5ea6\u3001\u800cjava\u4e2d\uff0c\u4e0d\u7ba1\u662fsynchronize\u8fd8\u662fLock\u63a5\u53e3\uff0c\u9501\u6807\u5fd7\u90fd\u662f\u653e\u5728\u5bf9\u8c61\u4e0a\u7684\uff0c\u6240\u4ee5\u4ece\u8fd9\u4e2a\u89d2\u5ea6\u6765\u8bb2\uff0cjava\u7684\u9501\u5c31\u662f\u5bf9\u8c61\u9501\u3002<\/p>\n<p>\u5f53\u9047\u5230\u9501\u51b2\u7a81\u7684\u65f6\u5019\u8be5\u600e\u4e48\u529e\uff1f<\/p>\n<ul>\n<li>\u5982\u679c\u5f53\u524d\u7ebf\u7a0b\u53ea\u8981\u9047\u5230\u9501\u88ab\u5360\u7528\uff0c\u5c31\u76f4\u63a5\u8fdb\u5165\u5230\u963b\u585e\u72b6\u6001\u3002\u90a3\u8fd9\u4e2a\u9501\u5c31\u662f\u6392\u5b83\u9501<\/li>\n<li>\u5982\u679c\u5f53\u524d\u7ebf\u7a0b\u53ea\u8981\u9047\u5230\u9501\u88ab\u5360\u7528\uff0c\u8981\u770b\u5f53\u524d\u64cd\u4f5c\u662f\u4ec0\u4e48\uff0c\u6765\u51b3\u5b9a\u5230\u5e95\u662f\u6302\u8d77\u3001\u8fd8\u662f\u8fdb\u5165\u4e34\u754c\u533a\uff0c\u90a3\u8fd9\u5c31\u662f\u5171\u4eab\u9501\u3002\u8fdb\u4e00\u6b65\uff0c\u5982\u679c\u6309\u7167\u8bfb\u5199\u6765\u660e\u786e\u8fd9\u4e2a\u64cd\u4f5c\uff0c\u90a3\u5c31\u662f\u8bfb\u9501\u3001\u5199\u9501\u3001\u8bfb\u5199\u9501\u3002<\/li>\n<li>\u5982\u679c\u5f53\u524d\u7ebf\u7a0b\u53ea\u8981\u9047\u5230\u9501\u88ab\u5360\u7528\uff0c\u4e0d\u662f\u7acb\u9a6c\u8fdb\u5165\u5230\u963b\u585e\u72b6\u6001\uff0c\u800c\u662f\u4e0d\u65ad\u53bb\u8f6e\u8be2\u4e00\u4e0b\u9501\u7684\u72b6\u6001\u3002\u8fd9\u5c31\u662f\u81ea\u65cb\u9501\u3002<\/li>\n<li>\u5982\u679c\u5f53\u524d\u7ebf\u7a0b\u53ea\u8981\u9047\u5230\u9501\u88ab\u5360\u7528\uff0c\u7136\u540e\u518d\u770b\u4e0b\u5c06\u8fd9\u4e2a\u9501\u6539\u6210\u5360\u7528\u72b6\u6001\u7684\u662f\u4e0d\u662f\u81ea\u5df1\u3002\u5982\u679c\u662f\u81ea\u5df1\uff0c\u90a3\u4e48\u5c31\u7ee7\u7eed\u8fdb\u5165\u4e34\u754c\u533a\u6267\u884c\uff1b\u5982\u679c\u4e0d\u662f\uff0c\u518d\u6839\u636e\u64cd\u4f5c\u7b49\u6765\u51b3\u5b9a\u4e0b\u4e00\u6b65\u52a8\u4f5c\u3002\u8fd9\u5c31\u662f\u53ef\u91cd\u5165\/\u4e0d\u53ef\u91cd\u5165\u9501\u3002<\/li>\n<li>\u5982\u679c\u5f53\u524d\u7ebf\u7a0b\u53ea\u8981\u9047\u5230\u9501\u88ab\u5360\u7528\uff0c\u4e14\u81ea\u5df1\u4e5f\u5df2\u7ecf\u5360\u7528\u4e86\u4e00\u4e2a\u9501\u6807\u5fd7\uff0c\u90a3\u4e48\u6b63\u597d\u5360\u7528\u4e86\u5f53\u524d\u7ebf\u7a0b\u7ad9\u5728\u68c0\u67e5\u7684\u90a3\u4e2a\u9501\u7684\u6807\u5fd7\u7684\u90a3\u4e2a\u7ebf\u7a0b\u5728\u68c0\u67e5\u5f53\u524d\u7ebf\u7a0b\u5360\u7528\u7684\u9501\uff0c\u5c31\u4f1a\u51fa\u73b0\u7ebf\u7a0b\u7684\u5faa\u73af\u7b49\u5f85\uff0c\u90a3\u5c31\u662f\u6b7b\u9501<\/li>\n<\/ul>\n<p>\u603b\u7ed3\u4e00\u4e0b\uff0c\u9501\u7684\u672c\u8d28\uff1a<\/p>\n<ul>\n<li>\u5728\u67d0\u4e2a\u5730\u65b9\u653e\u4e00\u4e2a\u6807\u5fd7\u3002<\/li>\n<li>\u6240\u6709\u7ebf\u7a0b\/\u8fdb\u7a0b\u5728\u8fdb\u5165\u4e34\u754c\u533a\u7684\u65f6\u5019\u90fd\u53bb\u68c0\u67e5\u4e0b\u8fd9\u4e2a\u6807\u5fd7\u3002<\/li>\n<li>\u800c\u8fdb\u5165\u4e34\u754c\u533a\u52a0\u9501\u5c31\u662f\u4fee\u6539\u8fd9\u4e2a\u6807\u5fd7<\/li>\n<li>\u9000\u51fa\u4e34\u754c\u533a\u89e3\u9501\u4e5f\u662f\u6e05\u9664\u8fd9\u4e2a\u6807\u5fd7\u3002<\/li>\n<\/ul>\n<hr \/>\n<h3>java\u4e2d\u7684Synchornize\u9501<\/h3>\n<h4>\u9501\u6807\u5fd7\u5b58\u653e\u4f4d\u7f6e<\/h4>\n<p>synchronize\u4f7f\u7528\u7684\u9501\u6807\u5fd7\u662f\u5b58\u653e\u5728\u5bf9\u8c61\u5934\u91cc\u7684\u3002\u5728java\u4e2d\uff0c\u5b9e\u4f8b\u5316\u4e00\u4e2a\u72ec\u4eab\u540e\uff0c\u9664\u4e86\u5bf9\u8c61\u91cc\u5b58\u653e\u7684\u6570\u636e\u5916\uff0c\u7f16\u8bd1\u5668\u8fd8\u4f1a\u989d\u5916\u7684\u7ed9\u6bcf\u4e2a\u5bf9\u8c61\u5206\u914d\u4e00\u5757\u5185\u5b58\uff0c\u5b58\u50a8\u4e00\u4e9b\u5bf9\u8c61\u6570\u636e\uff0c\u8fd9\u5757\u5185\u5b58\u5c31\u662f\u6240\u8c13\u7684\u5bf9\u8c61\u5934\u3002<\/p>\n<p>java\u4e2d\uff0c\u5bf9\u8c61\u7684\u5bf9\u8c61\u5934\u7531\u4e09\u90e8\u5206\u6784\u6210(\u5982\u679c\u662f\u6570\u7ec4\u8fd8\u6709\u4e00\u90e8\u5206\u5c31\u662f\u8bb0\u5f55\u6570\u7ec4\u957f\u5ea6\u7684):<\/p>\n<p>\u7c7b\u578b\u6307\u9488\uff1a\u7c7b\u578b\u6307\u9488\u6307\u5411\u7684\u5c31\u662f\u5f53\u524d\u5bf9\u8c61\u7684\u7c7b\u7684\u5143\u6570\u636e\uff0c\u865a\u62df\u673a\u901a\u8fc7\u8fd9\u4e2a\u6307\u9488\u6765\u786e\u5b9a\u8be5\u5bf9\u8c61\u662f\u54ea\u4e2a\u7c7b\u7684\u5b9e\u4f8b\u3002<\/p>\n<p><strong>mark word<\/strong>\uff1a\u8fd9\u90e8\u90e8\u5206\u4e3b\u8981\u7528\u6765\u8bb0\u5f55\u8be5\u5bf9\u8c61\u81ea\u8eab\u7684\u8fd0\u884c\u65f6\u6570\u636e\uff0c\u5982hashcode\uff0cgc\u5206\u4ee3\u5e74\u9f84\u7b49\u3002mark word\u5360\u7528\u4e00\u4e2ajvm\u7684\u5b57\u5927\u5c0f\uff0c\u537332\u4f4d\u7684jvm\uff0cmark word\u4e3a32\u4f4d\uff1b64\u4f4d\u7684jvm\uff0cmark word\u536064\u4f4d\u3002synchronize\u4f7f\u7528\u7684\u9501\u6807\u5fd7\uff0c\u5c31\u662f\u8bb0\u5f55\u5728mark word\u91cc\u9762\u7684\u3002<\/p>\n<p>\u4ee532\u4f4d\u7684jvm\u4e3a\u4f8b\u6765\u8bf4\u660emark word\u7684\u6784\u6210<\/p>\n<p>\u4f4f\u9662\u53f7\u5c31\u662f\u4e24\u90e8\u5206\u6784\u6210\uff1a<\/p>\n<p><strong>\u9ad830\u4f4d\u90e8\u5206<\/strong>\uff1amark word\u4e2d\u5b58\u653e\u4fe1\u606f\u7684\u90e8\u5206<\/p>\n<p><strong>\u4f4e2\u4f4d\u90e8\u5206<\/strong>\uff1a\u8fd9\u90e8\u5206\u5c31\u662f\u6807\u5fd7\u4f4d\uff0c\u4f4e2\u4f4d\u53d6\u503c\u4e0d\u540c\uff0c\u4ee3\u8868\u4e86\u9ad830\u4f4d\u5b58\u653e\u7684\u5185\u5bb9\u662f\u4e0d\u4e00\u6837\u7684<\/p>\n<p><br \/><br \/><br \/><\/p>\n<p><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/img.picgo.net\/2024\/10\/15\/imagebfe801870cffd250.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/img.picgo.net\/2024\/10\/15\/imagebfe801870cffd250.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"image\" border=\"0\" \/><\/div><\/p>\n<h4>\u9047\u5230\u51b2\u7a81\u600e\u4e48\u529e<\/h4>\n<p><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/img.picgo.net\/2024\/10\/15\/imagee3e2ed73f9625308.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/img.picgo.net\/2024\/10\/15\/imagee3e2ed73f9625308.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"image\" border=\"0\" \/><\/div><\/p>\n<hr \/>\n<h3>jdk\u4e2d\u7684lock<\/h3>\n<p>\u4ee5\u6bd4\u8f83\u5e38\u7528\u7684\u4e24\u7c7b\u9501\uff1a\u53ef\u91cd\u5165\u9501ReentrantLock\u548cReentrantReadWriteLock\u4e3a\u4f8b\u6765\u8bf4\u660e\uff1a<\/p>\n<p><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/img.picgo.net\/2024\/10\/15\/imagedda6d1f7593518e7.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/img.picgo.net\/2024\/10\/15\/imagedda6d1f7593518e7.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"image\" border=\"0\" \/><\/div><\/p>\n<p>\u9501\u6807\u5fd7\u5b58\u54ea\u513f\u3002\u5728jdk\u4e2d\u6709\u4e00\u4e2a\u9501\u5b9e\u73b0\u7684\u5171\u6709\u62bd\u8c61\u7236\u7c7b\uff0c\u90a3\u5c31\u662fAbstractQueuedSynchronizer\uff0cjdk\u4e2d\u6240\u6709\u7684\u9501\u5b9e\u73b0\u90fd\u4f1a\u4f9d\u8d56\u4e8e\u8fd9\u4e2a\u62bd\u8c61\u7236\u7c7b\uff0c\u8fd9\u5c31\u662f\u5f88\u591a\u535a\u5ba2\u4e2d\u9501\u8bf4\u5927\u540d\u9f0e\u9f0e\u7684AQS\u3002\u8fd9\u4e2a\u7c7b\u91cc\u5c31\u662f\u7528\u6765\u5b58\u50a8\u9501\u6807\u5fd7\u7684\u3002\u6bd4\u5982AQS#state\u5b57\u6bb5\uff0c\u5c31\u662f\u6765\u6807\u8bb0\u9501\u662f\u5426\u522b\u5360\u7528\u7684\u3002\u5176\u7236\u7c7bAbstractOwnableSynchronizer#exclusiveOwnerThread\u5c31\u662f\u7528\u6765\u6807\u8bb0\u5f53\u524d\u9501\u88ab\u54ea\u4e2a\u7ebf\u7a0b\u5360\u7528\u7684\uff0c\u4ece\u800c\u5b9e\u73b0\u53ef\u91cd\u5165\u3002<\/p>\n<p>\u5f53\u7ebf\u7ebf\u7a0b\u5728\u8fdb\u5165\u4e34\u754c\u533a\u65f6\uff0c\u9047\u5230\u9501\u51b2\u7a81\u600e\u4e48\u529e\uff1f<\/p>\n<p>\u4f7f\u7528Lock\u63a5\u53e3\u7684\u65f6\u5019\uff0clock#lock()\u548clock#unlock()\u5305\u56f4\u8d77\u6765\u7684\u5c31\u662f\u4e34\u754c\u533a\u3002\u6240\u4ee5\u4efb\u4f55\u4e00\u4e2a\u7ebf\u7a0b\u8981\u8fdb\u5165\u4e34\u754c\u533a\u90fd\u5148\u8981\u6267\u884clock#lock()\u4e5f\u662f\u5728\u8fd9\u4e2a\u65b9\u6cd5\u91cc\u53bb\u68c0\u67e5\u9501\u6807\u5fd7\u7684\u3002<\/p>\n<ol>\n<li>\u5f53\u9501\u88ab\u5360\u7528(AQS#state\u4e0d\u4e3a0)\uff0c\u90a3\u4e48\u5f53\u524d\u7ebf\u7a0b\u5c31\u4f1a\u9996\u5148\u4f7f\u7528CAS\u53bb\u4fee\u6539state\u503c(\u5373\u81ea\u65cb\u83b7\u5f97\u9501)\uff0c\u8fd9\u4e2a\u8fc7\u7a0b\u662f\u548csynchronize\u7684\u8f7b\u91cf\u7ea7\u9501\u7684\u8fc7\u7a0b\u662f\u4e00\u6a21\u4e00\u6837\u7684\u3002\u65e0\u975e\u5c31\u662fsynchronize\u7684CAS\u662f\u7f16\u8f91\u5668\u690d\u5165\u7684\uff0c\u800cLock#lock()\u7684CAS\u662f\u7528\u7684UnSafe\u5305\u88c5\u7684CAS\u6307\u4ee4\u3002<\/li>\n<li>\u5f53CAS\u8fbe\u5230\u4e00\u5b9a\u6b21\u6570\u7684\u65f6\u5019(spinForTimeoutThreshold)\uff0c\u5c31\u662f\u4f7f\u7528LockSupport#park()\u5c06\u5f53\u524d\u7ebf\u7a0b\u6302\u8d77\u3002\u5176\u5b9e\u5c31\u662f\u5347\u7ea7\u5230\u91cd\u91cf\u7ea7\u9501\u4e86\u3002<\/li>\n<\/ol>\n<p>\u00a0<\/p>\n<p>\u8fd9\u91cc\u4e5f\u53ef\u4ee5\u770b\u5230\uff0c\u548csynchronize\u76f8\u6bd4\uff0cjdk\u7684\u5b9e\u73b0\uff0c\u5176\u5b9e\u5df2\u7ecf\u6ca1\u6709\u504f\u5411\u9501\u4e86\u3002\u53ea\u6709\u8f7b\u91cf\u7ea7\u9501\u548c\u91cd\u91cf\u7ea7\u9501<\/p>\n<p>\u6240\u4ee5\u4e0d\u7ba1\u662fsynchronize\u8fd8\u662fLock\uff0c\u5176\u5b9e\u9501\u6807\u5fd7 \u90fd\u662f\u5b58\u653e\u5728\u5bf9\u8c61\u4e0a\u7684\uff0c\u6240\u4ee5\u6211\u4eec\u53ef\u4ee5\u8ba4\u4e3a\u5c31\u662f\u5bf9\u8c61\u9501\u3002<\/p>\n<hr \/>\n<h3>\u7ecf\u5178\u9762\u8bd5\u9898\uff1asynchornize\u548clock\u7684\u533a\u522b<\/h3>\n<p>synchronize\u552f\u4e00\u505a\u4e0d\u5230\u7684\u662f\uff1a\u5728A\u5904\u52a0\u9501\u3001\u5728B\u5904\u91ca\u653e\uff0c\u800cA\u3001B\u4e24\u5904\u662f\u4e0d\u540c\u7684\u4ee3\u7801\u5757\uff0c\u4f46\u60f3\u60f3\u771f\u5b9e\u4e16\u754c\u4e2d\uff0c\u771f\u6709\u8fd9\u4e48\u5947\u8469\u7684\u4f7f\u7528\u65b9\u5f0f\u4e48\uff1f<\/p>\n<p>\u5b9e\u9645\u4e0a\uff0c\u5728\u7edd\u5927\u90e8\u5206\u573a\u666f\u4e2d\uff0csynchronize\u548clock\u5df2\u7ecf\u6ca1\u6709\u90a3\u4e48\u5927\u7684\u533a\u522b\u7684\u3002<\/p>\n<ol>\n<li>synchronize\u9ed8\u8ba4\u5f00\u542f\u4e86\u504f\u5411\u9501\uff0c\u504f\u5411\u9501\u5728\u6709\u6240\u7684\u7ade\u4e89\u7684\u65f6\u5019\uff0c\u5176\u5b9e\u4f1a\u5f71\u54cd\u6027\u80fd\uff1b\u800clock\u662f\u6ca1\u6709\u504f\u5411\u9501\u7684\u3002<\/li>\n<li>\u5bf9\u4e8e\u6761\u4ef6\u53d8\u91cf\u7684\u4f7f\u7528\u4e0a\uff0cLock\u5176\u5b9e\u662f\u66f4\u7075\u6d3b\uff0c\u53ef\u4ee5\u652f\u6301\u591a\u4e2a\u6761\u4ef6\u53d8\u91cf\u3002\u800c\u6761\u53d8\u91cf\u7684\u4f7f\u7528\u662f\u53ef\u4ee5\u51cf\u5c11\u60ca\u7fa4\u6548\u5e94\u7684\u3002<\/li>\n<li>synchronize\u5b58\u5728\u6240\u8c13\u7684\u9501\u5347\u7ea7\u95ee\u9898\uff0c\u4e00\u65e6\u9501\u5347\u7ea7\u540e\uff0c\u5c31\u4e0d\u80fd\u964d\u7ea7\u4e86\u3002\u4f46\u662fLock\u662f\u4e0d\u5b58\u5728\u7684\u8fd9\u79cd\u5347\u7ea7\u7684\u3002\u4f46\u5e76\u4e0d\u662f\u8bf4lock\u5c31\u66f4\u725b\u903c\uff0c\u4e2a\u4eba\u89c9\u5f97\u53ea\u662f\u8bbe\u8ba1\u7406\u5ff5\u4e0d\u4e00\u6837\u800c\u5df2\uff0c\u9762\u5bf9\u4e0d\u540c\u7684\u573a\u666f\u5c31\u5404\u6709\u4f18\u52a3\u3002<\/li>\n<li>\u9762\u5bf9\u7a81\u53d1\u7684\u4e25\u91cd\u51b2\u7a81\uff0c\u7136\u540e\u53c8\u7acb\u5373\u7f13\u89e3\u3002\u56e0\u4e3asynchronize\u53ef\u80fd\u5df2\u7ecf\u5347\u7ea7\u6210\u91cd\u91cf\u7ea7\u9501\u4e86\uff0c\u90a3\u540e\u7eed\u9501\u90fd\u662f\u91cd\u91cf\u7ea7\u9501\u4e86\u3002\u4f46lock\u4efb\u4f55\u65f6\u5019\u83b7\u53d6\u9501\u7684\u8fc7\u7a0b\u90fd\u4e00\u6837\uff0c\u6240\u4ee5\u540e\u9762\u8fd8\u662f\u6709CAS\u81ea\u65cb\u7684\u8fc7\u7a0b\u7684\u3002<\/li>\n<\/ol>\n<p>\u5982\u679c\u6301\u7eed\u51b2\u7a81\uff0c\u90a3\u4e48\u8fd9\u4e2a\u65f6\u5019\u91cd\u91cf\u7ea7\u9501\u6302\u8d77\u7ebf\u7a0b\u53cd\u800c\u662f\u6700\u4f18\u7684\uff0c\u800cLock\u5c31\u4f1a\u5b58\u5728\u5927\u91cf\u7684\u6beb\u65e0\u610f\u4e49\u7684CAS\u81ea\u65cb\u3002<\/p>","protected":false},"excerpt":{"rendered":"<p>\u4e50\u89c2\u9501\u548c\u60b2\u89c2\u9501 \u4e50\u89c2\u548c\u60b2\u89c2\u7684\u5b9a\u4e49\u662f\u5bf9\u4e8e\u6570\u636e\u51b2\u7a81\u7684\u6001\u5ea6\uff0c\u4e50\u89c2\u9501\u4e50\u89c2\u5730\u8ba4\u4e3a\u5e76\u53d1\u4e0d\u4f1a\u9020\u6210\u6570\u636e\u51b2\u7a81\uff0c\u60b2\u89c2\u9501\u60b2\u89c2\u7684\u8ba4\u4e3a\u5e76 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":359,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[10],"class_list":["post-358","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized","tag-10"],"_links":{"self":[{"href":"http:\/\/www.zackzzp.top\/index.php\/wp-json\/wp\/v2\/posts\/358","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.zackzzp.top\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.zackzzp.top\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.zackzzp.top\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.zackzzp.top\/index.php\/wp-json\/wp\/v2\/comments?post=358"}],"version-history":[{"count":4,"href":"http:\/\/www.zackzzp.top\/index.php\/wp-json\/wp\/v2\/posts\/358\/revisions"}],"predecessor-version":[{"id":364,"href":"http:\/\/www.zackzzp.top\/index.php\/wp-json\/wp\/v2\/posts\/358\/revisions\/364"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/www.zackzzp.top\/index.php\/wp-json\/wp\/v2\/media\/359"}],"wp:attachment":[{"href":"http:\/\/www.zackzzp.top\/index.php\/wp-json\/wp\/v2\/media?parent=358"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.zackzzp.top\/index.php\/wp-json\/wp\/v2\/categories?post=358"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.zackzzp.top\/index.php\/wp-json\/wp\/v2\/tags?post=358"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}