\u5b58\u5728\u5c42\u6b21\u4e0a\uff1a
\n1\u3001synchronized\uff1aJava \u7684\u5173\u952e\u5b57\uff0c\u5728 jvm \u5c42\u9762\u4e0a
\n2\u3001Lock\uff1a\u662f\u4e00\u4e2a\u63a5\u53e3
\n\u9501\u7684\u91ca\u653e\uff1a
\nsynchronized:
\n1\u3001\u4ee5\u83b7\u53d6\u9501\u7684\u7ebf\u7a0b\u6267\u884c\u5b8c\u540c\u6b65\u4ee3\u7801\uff0c\u91ca\u653e\u9501
\n2\u3001\u7ebf\u7a0b\u6267\u884c\u53d1\u751f\u5f02\u5e38\uff0cjvm \u4f1a\u8ba9\u7ebf\u7a0b\u91ca\u653e\u9501<\/p>\n
Lock:
\n1\u3001\u5728finally \u4e2d\u5fc5\u987b\u91ca\u653e\u9501\uff0c\u4e0d\u7136\u5bb9\u6613\u9020\u6210\u7ebf\u7a0b\u6b7b\u9501<\/p>\n
\u9501\u7684\u83b7\u53d6\uff1a
\n1\u3001synchronized\uff1a\u5047\u8bbeA\u7ebf\u7a0b\u83b7\u5f97\u9501\uff0cB \u7ebf\u7a0b\u7b49\u5f85\u3002\u5982\u679cA\u7ebf\u7a0b\u963b\u585e\uff0cB\u7ebf\u7a0b\u4f1a\u4e00\u76f4\u7b49\u5f85
\n2\u3001Lock\uff1a\u5206\u60c5\u51b5\u800c\u5b9a\uff0cLock \u6709\u591a\u4e2a\u9501\u83b7\u53d6\u7684\u65b9\u5f0f\uff0c\u5927\u81f4\u5c31\u662f\u53ef\u4ee5\u5c1d\u8bd5\u83b7\u5f97\u9501\uff0c\u7ebf\u7a0b\u53ef\u4ee5\u4e0d\u7528\u4e00\u76f4\u7b49\u5f85(\u53ef\u4ee5\u901a\u8fc7 tryLock() \u5224\u65ad\u6709\u6ca1\u6709\u9501)<\/p>\n
\u9501\u7684\u91ca\u653e\uff08\u6b7b\u9501\u4ea7\u751f\uff09\uff1a
\n1\u3001synchronized\uff1a\u5728\u53d1\u751f\u5f02\u5e38\u65f6\u5019\u4f1a\u81ea\u52a8\u91ca\u653e\u5360\u6709\u7684\u9501\uff0c\u56e0\u6b64\u4e0d\u4f1a\u51fa\u73b0\u6b7b\u9501
\n2\u3001Lock\uff1a\u53d1\u751f\u5f02\u5e38\u65f6\u5019\uff0c\u4e0d\u4f1a\u4e3b\u52a8\u91ca\u653e\u5360\u6709\u7684\u9501\uff0c\u5fc5\u987b\u624b\u52a8 unlock() \u6765\u91ca\u653e\u9501\uff0c\u53ef\u80fd\u5f15\u8d77\u6b7b\u9501\u7684\u53d1\u751f<\/p>\n
\u9501\u7684\u72b6\u6001\uff1a
\n1\u3001synchronized\uff1a\u65e0\u6cd5\u5224\u65ad
\n2\u3001Lock\uff1b\u53ef\u4ee5\u5224\u65ad<\/p>\n
\u9501\u7684\u7c7b\u578b\uff1a
\n1\u3001synchronized\uff1a\u53ef\u91cd\u5165 \u4e0d\u53ef\u4e2d\u65ad \u975e\u516c\u5e73
\n2\u3001lock\uff1a\u53ef\u91cd\u5165 \u53ef\u5224\u65ad \u53ef\u516c\u5e73\uff08\u4e24\u8005\u7686\u53ef\uff09
\n\u6027\u80fd\uff1a
\n1\u3001synchronized\uff1a\u5c11\u91cf\u540c\u6b65
\n2\u3001Lock\uff1a\u5927\u91cf\u540c\u6b65<\/p>\n
1\u3001Lock \u53ef\u4ee5\u63d0\u9ad8\u591a\u4e2a\u7ebf\u7a0b\u8fdb\u884c\u8bfb\u64cd\u4f5c\u7684\u6548\u7387\u3002\uff08\u53ef\u4ee5\u901a\u8fc7 readwritelock\u5b9e\u73b0\u8bfb\u5199\u5206\u79bb\uff09
\n2\u3001\u5728\u8d44\u6e90\u7ade\u4e89\u4e0d\u662f\u5f88\u6fc0\u70c8\u7684\u60c5\u51b5\u4e0b,Synchronized \u7684\u6027\u80fd\u8981\u4f18\u4e8e Reetrantlock,\u4f46\u662f\u5728\u8d44\u6e90\u7ade\u4e89\u5f88\u6fc0\u70c8\u7684\u60c5\u51b5\u4e0b\uff0cSynchronized \u7684\u6027\u80fd\u4f1a\u4e0b\u964d\u51e0\u5341\u500d\uff0c\u4f46\u662fReetrantLock \u7684\u6027\u80fd\u80fd\u7ef4\u6301\u5e38\u6001;
\n3\u3001ReentrantLock \u63d0\u4f9b\u4e86\u591a\u6837\u5316\u7684\u540c\u6b65\uff0c\u6bd4\u5982\u6709\u65f6\u95f4\u9650\u5236\u7684\u540c\u6b65\uff0c\u53ef\u4ee5\u88abInterrupt \u7684\u540c\u6b65\uff08synchronized \u7684\u540c\u6b65\u662f\u4e0d\u80fd Interrupt \u7684\uff09\u7b49\u3002\u5728\u8d44\u6e90\u7ade\u4e89\u4e0d\u6fc0\u70c8\u7684\u60c5\u5f62\u4e0b\uff0c\u6027\u80fd\u7a0d\u5fae\u6bd4 synchronized \u5dee\u70b9\u70b9\u3002\u4f46\u662f\u5f53\u540c\u6b65\u975e\u5e38\u6fc0\u70c8\u7684\u65f6\u5019\uff0csynchronized \u7684\u6027\u80fd\u4e00\u4e0b\u5b50\u80fd\u4e0b\u964d\u597d\u51e0\u5341\u500d\u3002\u800c ReentrantLock \u786e\u8fd8\u80fd\u7ef4\u6301\u5e38\u6001\u3002<\/p>\n
\u8c03\u5ea6\uff1a
\n1\u3001synchronized\uff1a\u4f7f\u7528 Object \u5bf9\u8c61\u672c\u8eab\u7684 wait \u3001notify\u3001notifyAl1\u8c03\u5ea6\u673a\u5236
\n2\u3001Lock\uff1a\u53ef\u4ee5\u4f7f\u7528 Condition \u8fdb\u884c\u7ebf\u7a0b\u4e4b\u95f4\u7684\u8c03\u5ea6<\/p>\n
\u7528\u6cd5\uff1a
\n1\u3001synchronized\uff1a\u5728\u9700\u8981\u540c\u6b65\u7684\u5bf9\u8c61\u4e2d\u52a0\u5165\u6b64\u63a7\u5236\uff0csynchronized \u53ef\u4ee5\u52a0\u5728\u65b9\u6cd5\u4e0a\uff0c\u4e5f\u53ef\u4ee5\u52a0\u5728\u7279\u5b9a\u4ee3\u7801\u5757\u4e2d\uff0c\u62ec\u53f7\u4e2d\u8868\u793a\u9700\u8981\u9501\u7684\u5bf9\u8c61\u3002
\n2\u3001Lock\uff1a\u4e00\u822c\u4f7f\u7528 ReentrantLock \u7c7b\u505a\u4e3a\u9501\u3002\u5728\u52a0\u9501\u548c\u89e3\u9501\u5904\u9700\u8981\u901a\u8fc7lock()\u548c unlock()\u663e\u5f0f\u6307\u51fa\u3002\u6240\u4ee5\u4e00\u822c\u4f1a\u5728 finally \u5757\u4e2d\u5199 unlock()\u4ee5\u9632\u6b7b\u9501\u3002<\/p>\n
\u5e95\u5c42\u5b9e\u73b0\uff1a
\n1\u3001synchronized\uff1a\u5e95\u5c42\u4f7f\u7528\u6307\u4ee4\u7801\u65b9\u5f0f\u6765\u63a7\u5236\u9501\u7684\uff0c\u6620\u5c04\u6210\u5b57\u8282\u7801\u6307\u4ee4\u5c31\u662f\u589e\u52a0\u6765\u4e24\u4e2a\u6307\u4ee4:monitorenter\u548cmonitorexit\u3002\u5f53\u7ebf\u7a0b\u6267\u884c\u9047\u5230monitorenter\u6307\u4ee4\u65f6\u4f1a\u5c1d\u8bd5\u83b7\u53d6\u5185\u7f6e\u9501\uff0c\u5982\u679c\u83b7\u53d6\u9501\u5219\u9501\u8ba1\u6570\u5668+1\uff0c\u5982\u679c\u6ca1\u6709\u83b7\u53d6\u9501\u5219\u963b\u585e\uff1b\u5f53\u9047\u5230monitorexit \u6307\u4ee4\u65f6\u9501\u8ba1\u6570\u5668-1\uff0c\u5982\u679c\u8ba1\u6570\u5668\u4e3a 0 \u5219\u91ca\u653e\u9501\u3002<\/p>\n
2\u3001Lock\uff1a\u5e95\u5c42\u662fCAS \u4e50\u89c2\u9501\uff0c\u4f9d\u8d56AbstractQueuedSynchronizer \u7c7b\uff0c\u628a\u6240\u6709\u7684\u8bf7\u6c42\u7ebf\u7a0b\u6784\u6210\u4e00\u4e2a CLH \u961f\u5217\u3002\u800c\u5bf9\u8be5\u961f\u5217\u7684\u64cd\u4f5c\u5747\u901a\u8fc7 Lock-Free\uff08CAS\uff09\u64cd\u4f5c\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5b58\u5728\u5c42\u6b21\u4e0a\uff1a 1\u3001synchronized\uff1aJava \u7684\u5173\u952e\u5b57\uff0c\u5728 jvm \u5c42\u9762\u4e0a 2\u3001Lock\uff1a\u662f\u4e00\u4e2a\u63a5\u53e3 […]<\/p>\n","protected":false},"author":8,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[99],"tags":[],"class_list":["post-9334","post","type-post","status-publish","format-standard","hentry","category-javabase"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/9334","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/comments?post=9334"}],"version-history":[{"count":1,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/9334\/revisions"}],"predecessor-version":[{"id":9335,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/9334\/revisions\/9335"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=9334"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=9334"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=9334"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}