1\u3001\t\u5e95\u5c42\u5b9e\u73b0\u4e0a\u6765\u8bf4
\nsynchronized\u662fJVM\u5c42\u9762\u7684\u9501\uff0c\u662fJava\u5173\u952e\u5b57\uff0c\u901a\u8fc7monitor\u5bf9\u8c61\u6765\u5b8c\u6210(monitorenter \u4e0emonitor exit),\u5bf9\u8c61\u53ea\u6709\u5728\u540c\u6b65\u5757\u6216\u540c\u6b65\u65b9\u6cd5\u4e2d\u624d\u80fd\u8c03\u7528wait\/notify\u65b9\u6cd5,ReentrantLock \u662f\u4ece jdkl.5 \u4ee5\u6765(java.util.concurrent.locks.Lock)\u63d0\u4f9b\u7684 API \u5c42\u9762\u7684\u9501\u3002
\nsynchronized\u7684\u5b9e\u73b0\u6d89\u53ca\u5230\u9501\u7684\u5347\u7ea7\uff0c\u5177\u4f53\u4e3a\u65e0\u9501\u3001\u504f\u5411\u9501\u3001\u81ea\u65cb\u9501\u3001\u5411OS\u7533\u8bf7\u91cd\u91cf\u7ea7\u9501\uff0c ReentrantLock\u5b9e\u73b0\u5219\u662f\u901a\u8fc7\u5229\u7528CAS (CompareAndSwap)\u81ea\u65cb\u673a\u5236\u4fdd\u8bc1\u7ebf\u7a0b\u64cd\u4f5c\u7684\u539f\u5b50\u6027\u548c volatile\u4fdd\u8bc1\u6570\u636e\u53ef\u89c1\u6027\u4ee5\u5b9e\u73b0\u9501\u7684\u529f\u80fd\u3002
\n2\u3001\t\u662f\u5426\u53ef\u624b\u52a8\u91ca\u653e\uff1a
\nsynchronized\u4e0d\u9700\u8981\u7528\u6237\u53bb\u624b\u52a8\u91ca\u653e\u9501,synchronized\u4ee3\u7801\u6267\u884c\u5b8c\u540e\u7cfb\u7edf\u4f1a\u81ea\u52a8\u8ba9\u7ebf\u7a0b\u91ca\u653e \u5bf9\u9501\u7684\u5360\u7528;ReentrantLock\u5219\u9700\u8981\u7528\u6237\u53bb\u624b\u52a8\u91ca\u653e\u9501\uff0c\u5982\u679c\u6ca1\u6709\u624b\u52a8\u91ca\u653e\u9501\uff0c\u5c31\u53ef\u80fd\u5bfc\u81f4 \u6b7b\u9501\u73b0\u8c61\u3002\u4e00\u822c\u901a\u8fc7lock()\u548cunlock()\u65b9\u6cd5\u914d\u5408try\/finally\u8bed\u53e5\u5757\u6765\u5b8c\u6210\uff0c\u4f7f\u7528\u91ca\u653e\u66f4\u52a0 \u7075\u6d3b\u3002
\n3\u3001\t\u662f\u5426\u53ef\u4e2d\u65ad
\nsynchronized\u662f\u4e0d\u53ef\u4e2d\u65ad\u7c7b\u578b\u7684\u9501\uff0c\u9664\u975e\u52a0\u9501\u7684\u4ee3\u7801\u4e2d\u51fa\u73b0\u5f02\u5e38\u6216\u6b63\u5e38\u6267\u884c\u5b8c\u6210; ReentrantLock \u5219\u53ef\u4ee5\u4e2d\u65ad\uff0c\u53ef\u901a\u8fc7 trylock(long timeout,TimeUnit unit)\u8bbe\u7f6e\u8d85\u65f6\u65b9\u6cd5\u6216 \u8005\u5c06locklnterruptibly()\u653e\u5230\u4ee3\u7801\u5757\u4e2d\uff0c\u8c03\u7528interrupt\u65b9\u6cd5\u8fdb\u884c\u4e2d\u65ad\u3002
\n4\u3001\t\u662f\u5426\u516c\u5e73\u9501
\nsynchronized\u4e3a\u975e\u516c\u5e73\u9501ReentrantLock\u5219\u5373\u53ef\u4ee5\u9009\u516c\u5e73\u9501\u4e5f\u53ef\u4ee5\u9009\u975e\u516c\u5e73\u9501\uff0c\u901a\u8fc7\u6784\u9020\u65b9 \u6cd5new ReentrantLock\u65f6\u4f20\u5165boolean\u503c\u8fdb\u884c\u9009\u62e9\uff0c\u4e3a\u7a7a\u9ed8\u8ba4false\u975e\u516c\u5e73\u9501\uff0ctrue\u4e3a\u516c\u5e73 \u9501\u3002
\n5\u3001\t\u9501\u662f\u5426\u53ef\u7ed1\u5b9a\u6761\u4ef6Condition
\nsynchronized \u4e0d\u80fd\u7ed1\u5b9a;ReentrantLock \u901a\u8fc7\u7ed1\u5b9a Condition \u7ed3\u5408 await()\/singal()\u65b9\u6cd5\u5b9e\u73b0\u7ebf\u7a0b\u7684\u7cbe\u786e\u5524\u9192\uff0c\u800c\u4e0d\u662f\u50cfsynchronized\u901a\u8fc7Object\u7c7b\u7684wait()\/notify()\/notifyAll() \u65b9\u6cd5\u8981\u4e48\u968f\u673a\u5524\u9192\u4e00\u4e2a\u7ebf\u7a0b\u8981\u4e48\u5524\u9192\u5168\u90e8\u7ebf\u7a0b\u3002
\n6\u3001\t\u9501\u7684\u5bf9\u8c61
\nsynchronzied\u9501\u7684\u662f\u5bf9\u8c61\uff0c\u9501\u662f\u4fdd\u5b58\u5728\u5bf9\u8c61\u5934\u91cc\u9762\u7684\uff0c\u6839\u636e\u5bf9\u8c61\u5934\u6570\u636e\u6765\u6807\u8bc6\u662f\u5426\u6709\u7ebf\u7a0b\u83b7 \u5f97\u9501\/\u4e89\u62a2\u9501;ReentrantLock\u9501\u7684\u662f\u7ebf\u7a0b\uff0c\u6839\u636e\u8fdb\u5165\u7684\u7ebf\u7a0b\u548cint\u7c7b\u578b\u7684state\u6807\u8bc6\u9501\u7684\u83b7\u5f97\/\u4e89\u62a2\u3002
\n\u4e3b\u8981\u533a\u522b\u5982\u4e0b\uff1a
\n1\u3001\tReentrantLock\u4f7f\u7528\u8d77\u6765\u6bd4\u8f83\u7075\u6d3b\uff0c\u4f46\u662f\u5fc5\u987b\u6709\u91ca\u653e\u9501\u7684\u914d\u5408\u52a8\u4f5c;
\n2\u3001\tReentrantLock\u5fc5\u987b\u624b\u52a8\u83b7\u53d6\u4e0e\u91ca\u653e\u9501\uff0c\u800csynchronized\u4e0d\u9700\u8981\u624b\u52a8\u91ca\u653e\u548c\u5f00\u542f\u9501;
\n3\u3001\tReentrantLock\u53ea\u9002\u7528\u4e8e\u4ee3\u7801\u5757\u9501\uff0c\u800csynchronized\u53ef\u4ee5\u4fee\u9970\u7c7b\u3001\u65b9\u6cd5\u3001\u53d8\u91cf\u7b49\u3002
\n4\u3001\t\u4e8c\u8005\u7684\u9501\u673a\u5236\u5176\u5b9e\u4e5f\u662f\u4e0d\u4e00\u6837\u7684\u3002ReentrantLock\u5e95\u5c42\u8c03\u7528\u7684\u662fUnsafe\u7684park\u65b9\u6cd5\u52a0 \u9501\uff0csynchronized\u64cd\u4f5c\u7684\u5e94\u8be5\u662f\u5bf9\u8c61\u5934\u4e2dmark word
\n5\u3001\tJava\u4e2d\u6bcf\u4e00\u4e2a\u5bf9\u8c61\u90fd\u53ef\u4ee5\u4f5c\u4e3a\u9501\uff0c\u8fd9\u662fsynchronized\u5b9e\u73b0\u540c\u6b65\u7684\u57fa\u7840\uff1a
\n1\u3001\t\u666e\u901a\u540c\u6b65\u65b9\u6cd5\uff0c\u9501\u662f\u5f53\u524d\u5b9e\u4f8b\u5bf9\u8c61
\n2\u3001\t\u9759\u6001\u540c\u6b65\u65b9\u6cd5\uff0c\u9501\u662f\u5f53\u524d\u7c7b\u7684class\u5bf9\u8c61
\n3\u3001\t\u540c\u6b65\u65b9\u6cd5\u5757\uff0c\u9501\u662f\u62ec\u53f7\u91cc\u9762\u7684\u5bf9\u8c61<\/p>\n","protected":false},"excerpt":{"rendered":"
1\u3001 \u5e95\u5c42\u5b9e\u73b0\u4e0a\u6765\u8bf4 synchronized\u662fJVM\u5c42\u9762\u7684\u9501\uff0c\u662fJava\u5173\u952e\u5b57\uff0c\u901a\u8fc7monitor\u5bf9\u8c61\u6765\u5b8c\u6210 […]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[118],"tags":[],"class_list":["post-9788","post","type-post","status-publish","format-standard","hentry","category-java"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/9788","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\/7"}],"replies":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/comments?post=9788"}],"version-history":[{"count":1,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/9788\/revisions"}],"predecessor-version":[{"id":9789,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/9788\/revisions\/9789"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=9788"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=9788"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=9788"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}