{"id":2974,"date":"2023-07-14T17:38:40","date_gmt":"2023-07-14T09:38:40","guid":{"rendered":"https:\/\/xinchewhd.com.cn\/?p=2974"},"modified":"2023-07-14T17:44:07","modified_gmt":"2023-07-14T09:44:07","slug":"%e9%9d%a2%e8%af%95%e9%a2%98%e7%b3%bb%e5%88%97%ef%bc%9asynchronized-%e5%92%8c-reentrantlock-%e7%9a%84%e5%ae%9e%e7%8e%b0%e5%8e%9f%e7%90%86%e6%98%af%e4%bb%80%e4%b9%88%ef%bc%9f%e5%ae%83%e4%bb%ac%e6%9c%89","status":"publish","type":"post","link":"https:\/\/xinchewhd.com.cn\/index.php\/%e9%9d%a2%e8%af%95\/%e9%9d%a2%e8%af%95%e9%a2%98%e7%b3%bb%e5%88%97%ef%bc%9asynchronized-%e5%92%8c-reentrantlock-%e7%9a%84%e5%ae%9e%e7%8e%b0%e5%8e%9f%e7%90%86%e6%98%af%e4%bb%80%e4%b9%88%ef%bc%9f%e5%ae%83%e4%bb%ac%e6%9c%89\/","title":{"rendered":"\u9762\u8bd5\u9898\u7cfb\u5217\uff1aSynchronized \u548c ReentrantLock \u7684\u5b9e\u73b0\u539f\u7406\u662f\u4ec0\u4e48\uff1f\u5b83\u4eec\u6709\u4ec0\u4e48\u533a\u522b\uff1f"},"content":{"rendered":"

\u4f5c\u8005\u5e73\u53f0\uff1a<\/span><\/span><\/p>\n

| CSDN\uff1ahttps:\/\/blog.csdn.net\/qq_41153943\uff08ID\uff1a\u6c5f\u590f\u3001\uff09<\/span>
<\/p>\n

| \u6398\u91d1\uff1ahttps:\/\/juejin.cn\/user\/651387938290686\uff08ID\uff1a<\/span><\/span>jiangxia_1024<\/span>\uff09<\/span><\/p>\n

| \u77e5\u4e4e\uff1ahttps:\/\/www.zhihu.com\/p<\/span>eople\/1024-paper-96\uff08ID\uff1a<\/span>\u6c5f\u590f\uff09<\/span><\/p>\n

| GitHub\uff1ahttps:\/\/github.com\/JiangXia-1024?tab=repositories<\/span><\/span><\/p>\n

| \u5fae\u4fe1\u516c\u4f17\u53f7\uff1a1024\u7b14\u8bb0<\/span><\/span><\/span><\/span><\/p>\n

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\n
\n \u672c\u6587\u4e00\u51711784\u5b57\uff0c\u9884\u8ba1\u9605\u8bfb11\u5206\u949f
\n <\/section>\n<\/section>\n<\/blockquote>\n
\n <\/qqmusic>
\n<\/section>\n
\n 1\u3001\u4ec0\u4e48\u662fSynchronized\u548cReentrantLock<\/span>
\n<\/section>\n

Synchronized\u548cReentrantLock\u90fd\u662fJava\u4e2d\u5b9e\u73b0\u7ebf\u7a0b\u540c\u6b65\u7684\u673a\u5236\uff0c\u5b83\u4eec\u7684\u76ee\u7684\u90fd\u662f\u4e3a\u4e86\u4fdd\u8bc1\u591a\u4e2a\u7ebf\u7a0b\u8bbf\u95ee\u5171\u4eab\u8d44\u6e90\u65f6\u7684\u4e92\u65a5\u6027\u548c\u53ef\u89c1\u6027\u3002<\/span><\/p>\n

Synchronized \u7684\u5b9e\u73b0\u539f\u7406\u662f\u57fa\u4e8e Jav<\/span>a \u4e2d\u7684\u5185\u7f6e\u76d1\u89c6\u5668\u9501\uff08<\/span>Intrinsic Lock\uff09\u6216\u79f0\u4f5c\u5bf9\u8c61\u9501\uff08Object Lock\uff09\uff0c\u6bcf\u4e2a Java \u5bf9\u8c61\u90fd\u6709\u4e00\u4e2a\u4e0e\u4e4b\u5173\u8054\u7684\u9501\u3002<\/span><\/p>\n

\u5f53\u4e00\u4e2a synchronized \u4ee3\u7801\u5757\u6267\u884c\u65f6\uff0c\u4f1a\u9996\u5148\u5c1d\u8bd5\u83b7\u5f97\u5185\u7f6e\u76d1\u89c6\u5668\u9501\u3002\u5982\u679c\u9501\u5df2\u7ecf\u88ab\u5176\u4ed6\u7ebf\u7a0b\u6301\u6709\uff0c\u5219\u5f53\u524d\u7ebf\u7a0b\u5c06\u8fdb\u5165\u963b\u585e\u72b6\u6001\uff0c\u76f4\u5230\u8be5\u9501\u88ab\u91ca\u653e\u4e3a\u6b62\uff1b\u5982\u679c\u9501\u672a\u88ab\u6301\u6709\uff0c\u5219\u5f53\u524d\u7ebf\u7a0b\u83b7\u5f97\u8be5\u9501\u3002\u5728 synchronized \u5757\u7ed3\u675f\u65f6\uff0c\u4f1a\u81ea\u52a8\u91ca\u653e\u9501\u3002<\/span><\/p>\n

ReentrantLock \u5219\u662f\u901a\u8fc7 java.util.concurrent.locks.ReentrantLock \u7c7b\u6765\u5b9e\u73b0\u7684\uff0c\u5b83\u5229\u7528\u4e86 Java\u4e2d\u7684AQS(AbstractQueuedSynchronizer) \u6765\u5b9e\u73b0\u7ebf\u7a0b\u7684\u540c\u6b65\uff0c\u5b83\u5141\u8bb8\u91cd\u5165\u7279\u6027\uff0c\u5373\u540c\u4e00\u7ebf\u7a0b\u53ef\u4ee5\u5bf9\u5df2\u7ecf\u83b7\u53d6\u5230\u7684\u9501\u518d\u6b21\u8fdb\u884c\u8bf7\u6c42\uff0c\u5982\u679c\u4e0d\u652f\u6301\u91cd\u5165\uff0c\u5219\u4f1ajava.lang.IllegalMonitorStateException\u5f02\u5e38\u3002<\/span><\/p>\n

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2\u3001ReentrantLock \u548c synchronized\u7684\u533a\u522b<\/span><\/p>\n<\/h2>\n

\u4e00\u822c\u6765\u8bf4ReentrantLock \u548c synchronized \u76f8\u6bd4\uff0c\u5177\u6709\u4ee5\u4e0b\u4f18\u70b9\uff1a<\/span><\/p>\n

1. \u53ef\u4ee5\u5b9e\u73b0\u516c\u5e73\u9501\u548c\u975e\u516c\u5e73\u9501\uff1aReentrantLock \u7684\u6784\u9020\u51fd\u6570\u4e2d\u63d0\u4f9b\u4e86\u4e00\u4e2a\u5e03\u5c14\u7c7b\u578b\u7684\u53c2\u6570 fair\uff0c\u53ef\u4ee5\u9009\u62e9\u521b\u5efa\u516c\u5e73\u9501\u8fd8\u662f\u975e\u516c\u5e73\u9501\u3002\u800c synchronized \u603b\u662f\u975e\u516c\u5e73\u9501\u3002<\/span><\/p>\n

2. \u652f\u6301\u591a\u4e2a Condition \u5bf9\u8c61\uff1aReentrantLock \u4e2d\u7684 Condition \u7c7b\u53ef\u4ee5\u521b\u5efa\u591a\u4e2a\u7b49\u5f85\u961f\u5217\uff0c\u4ee5\u4fbf\u66f4\u7ec6\u7c92\u5ea6\u5730\u63a7\u5236\u7ebf\u7a0b\u7684\u5524\u9192\u3002<\/span><\/p>\n

3. \u652f\u6301\u4e2d\u65ad\u7b49\u5f85\u9501\u7684\u7ebf\u7a0b\uff1a\u901a\u8fc7 ReentrantLock \u7684 lockInterruptibly \u65b9\u6cd5\uff0c\u53ef\u4ee5\u5b9e\u73b0\u5bf9\u7b49\u5f85\u9501\u7684\u7ebf\u7a0b\u8fdb\u884c\u4e2d\u65ad\u64cd\u4f5c\u3002synchronized \u5219\u65e0\u6cd5\u4e2d\u65ad\u7b49\u5f85\u9501\u7684\u7ebf\u7a0b\u3002<\/span><\/p>\n

4. \u63d0\u4f9b\u4e86\u4e00\u4e9b\u9ad8\u7ea7\u529f\u80fd\uff1a\u5982 tryLock() \u5c1d\u8bd5\u83b7\u5f97\u9501\u4f46\u4e0d\u963b\u585e\uff1blockInterruptibly() \u80fd\u591f\u54cd\u5e94\u7ebf\u7a0b\u7684\u4e2d\u65ad\u8bf7\u6c42\u3002<\/span><\/p>\n

\u5728\u4f7f\u7528 ReentrantLock \u65f6\uff0c\u9700\u8981\u624b\u52a8\u91ca\u653e\u9501\uff0c\u5426\u5219\u53ef\u80fd\u4f1a\u5bfc\u81f4\u6b7b\u9501\u7b49\u95ee\u9898\u3002<\/span><\/p>\n

\u603b\u7ed3\u4e0b\u6765\uff0csynchronized \u548c ReentrantLock \u90fd\u53ef\u4ee5\u5b9e\u73b0\u7ebf\u7a0b\u540c\u6b65\uff0c\u4f46\u5728\u7279\u5b9a\u7684\u573a\u666f\u4e0b\u6709\u7740\u5404\u81ea\u7684\u4f18\u7f3a\u70b9\u3002\u901a\u5e38\u60c5\u51b5\u4e0b\uff0csynchronized \u66f4\u52a0\u7b80\u5355\u6613\u7528\uff0c\u800c ReentrantLock \u5728\u67d0\u4e9b\u590d\u6742\u573a\u666f\u4e0b\u80fd\u591f\u63d0\u4f9b\u66f4\u4e30\u5bcc\u7684\u529f\u80fd\u3002<\/span><\/span><\/p>\n

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3\u3001\u4ee3\u7801\u6f14\u793a<\/span><\/span><\/p>\n<\/h2>\n

\u63a5\u4e0b\u6765\u4ee3\u7801\u5206\u522b\u6f14\u793aSynchronized\u548cReentrantLock\u7684\u4f7f\u7528\uff1a<\/span><\/p>\n

\u4f7f\u7528 synchronized \u5b9e\u73b0\u7ebf\u7a0b\u540c\u6b65\u7684\u793a\u4f8b\u4ee3\u7801\uff1a<\/span><\/p>\n

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