{"id":533,"date":"2019-10-09T10:43:58","date_gmt":"2019-10-09T02:43:58","guid":{"rendered":"http:\/\/weitaoc.com\/?p=533"},"modified":"2019-10-09T10:46:30","modified_gmt":"2019-10-09T02:46:30","slug":"%e5%85%88%e8%a1%8c%e5%8f%91%e7%94%9f%e5%8e%9f%e5%88%99%ef%bc%88happens-before%ef%bc%89","status":"publish","type":"post","link":"http:\/\/weitaoc.com\/?p=533","title":{"rendered":"\u5148\u884c\u53d1\u751f\u539f\u5219\uff08Happens-before\uff09"},"content":{"rendered":"\n<p>\u5148\u884c\u53d1\u751f\u539f\u5219\uff08Happens-Before\uff09\u662f\u5224\u65ad\u6570\u636e\u662f\u5426\u5b58\u5728\u7ade\u4e89\u3001\u7ebf\u7a0b\u662f\u5426\u5b89\u5168\u7684\u4e3b\u8981\u4f9d\u636e\u3002 <\/p>\n\n\n\n<p>\u5148\u884c\u53d1\u751f\u662fJava\u5185\u5b58\uff0c\u6a21\u578b\u4e2d\u5b9a\u4e49\u7684\u4e24\u9879\u64cd\u4f5c\u4e4b\u95f4\u7684\u504f\u5e8f\u5173\u7cfb\uff0c\u5982\u679c\u64cd\u4f5cA\u5148\u884c\u53d1\u751f\u4e8e\u64cd\u4f5cB\uff0c\u90a3\u4e48\u64cd\u4f5cA\u4ea7\u751f\u7684\u5f71\u54cd\u80fd\u591f\u88ab\u64cd\u4f5cB\u89c2\u5bdf\u5230\u3002<\/p>\n\n\n\n<p>Java\u5185\u5b58\u6a21\u578b\u4e2d\u5b58\u5728\u7684\u5929\u7136\u7684\u5148\u884c\u53d1\u751f\u5173\u7cfb\uff1a &nbsp; <\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>1. \u7a0b\u5e8f\u6b21\u5e8f\u89c4\u5219\uff1a\u540c\u4e00\u4e2a\u7ebf\u7a0b\u5185\uff0c\u6309\u7167\u4ee3\u7801\u51fa\u73b0\u7684\u987a\u5e8f\uff0c\u524d\u9762\u7684\u4ee3\u7801\u5148\u884c\u4e8e\u540e\u9762\u7684\u4ee3\u7801\uff0c\u51c6\u786e\u7684\u8bf4\u662f\u63a7\u5236\u6d41\u987a\u5e8f\uff0c\u56e0\u4e3a\u8981\u8003\u8651\u5230\u5206\u652f\u548c\u5faa\u73af\u7ed3\u6784\u3002 &nbsp; <\/li><li>2. \u7ba1\u7a0b\u9501\u5b9a\u89c4\u5219\uff1a\u4e00\u4e2aunlock\u64cd\u4f5c\u5148\u884c\u53d1\u751f\u4e8e\u540e\u9762\uff08\u65f6\u95f4\u4e0a\uff09\u5bf9\u540c\u4e00\u4e2a\u9501\u7684lock\u64cd\u4f5c\u3002 &nbsp;<\/li><li>3. volatile\u53d8\u91cf\u89c4\u5219\uff1a\u5bf9\u4e00\u4e2avolatile\u53d8\u91cf\u7684\u5199\u64cd\u4f5c\u5148\u884c\u53d1\u751f\u4e8e\u540e\u9762\uff08\u65f6\u95f4\u4e0a\uff09\u5bf9\u8fd9\u4e2a\u53d8\u91cf\u7684\u8bfb\u64cd\u4f5c\u3002 &nbsp;<\/li><li>4. \u7ebf\u7a0b\u542f\u52a8\u89c4\u5219\uff1aThread\u7684start( )\u65b9\u6cd5\u5148\u884c\u53d1\u751f\u4e8e\u8fd9\u4e2a\u7ebf\u7a0b\u7684\u6bcf\u4e00\u4e2a\u64cd\u4f5c\u3002 <\/li><li>5. \u7ebf\u7a0b\u7ec8\u6b62\u89c4\u5219\uff1a\u7ebf\u7a0b\u7684\u6240\u6709\u64cd\u4f5c\u90fd\u5148\u884c\u4e8e\u6b64\u7ebf\u7a0b\u7684\u7ec8\u6b62\u68c0\u6d4b\u3002\u53ef\u4ee5\u901a\u8fc7Thread.join( )\u65b9\u6cd5\u7ed3\u675f\u3001Thread.isAlive( )\u7684\u8fd4\u56de\u503c\u7b49\u624b\u6bb5\u68c0\u6d4b\u7ebf\u7a0b\u7684\u7ec8\u6b62\u3002<\/li><li>6. \u7ebf\u7a0b\u4e2d\u65ad\u89c4\u5219\uff1a\u5bf9\u7ebf\u7a0binterrupt( )\u65b9\u6cd5\u7684\u8c03\u7528\u5148\u884c\u53d1\u751f\u4e8e\u88ab\u4e2d\u65ad\u7ebf\u7a0b\u7684\u4ee3\u7801\u68c0\u6d4b\u5230\u4e2d\u65ad\u4e8b\u4ef6\u7684\u53d1\u751f\uff0c\u53ef\u4ee5\u901a\u8fc7Thread.interrupt( )\u65b9\u6cd5\u68c0\u6d4b\u7ebf\u7a0b\u662f\u5426\u4e2d\u65ad<\/li><li>7. \u5bf9\u8c61\u7ec8\u7ed3\u89c4\u5219\uff1a\u4e00\u4e2a\u5bf9\u8c61\u7684\u521d\u59cb\u5316\u5b8c\u6210\u5148\u884c\u4e8e\u53d1\u751f\u5b83\u7684finalize\uff08\uff09\u65b9\u6cd5\u7684\u5f00\u59cb\u3002<\/li><li>8. \u4f20\u9012\u6027\uff1a\u5982\u679c\u64cd\u4f5cA\u5148\u884c\u4e8e\u64cd\u4f5cB\uff0c\u64cd\u4f5cB\u5148\u884c\u4e8e\u64cd\u4f5cC\uff0c\u90a3\u4e48\u64cd\u4f5cA\u5148\u884c\u4e8e\u64cd\u4f5cC\u3002 &nbsp; <\/li><\/ul>\n\n\n\n<p>\u603b\u7ed3\uff1a\u4e00\u4e2a\u64cd\u4f5c\u201c\u65f6\u95f4\u4e0a\u7684\u5148\u53d1\u751f\u201d\u4e0d\u4ee3\u8868\u8fd9\u4e2a\u64cd\u4f5c\u5148\u884c\u53d1\u751f\uff1b\u4e00\u4e2a\u64cd\u4f5c\u5148\u884c\u53d1\u751f\u4e5f\u4e0d\u4ee3\u8868\u8fd9\u4e2a\u64cd\u4f5c\u5728\u65f6\u95f4\u4e0a\u662f\u5148\u53d1\u751f\u7684\uff08\u91cd\u6392\u5e8f\u7684\u51fa\u73b0\uff09\u3002 \u65f6\u95f4\u4e0a\u7684\u5148\u540e\u987a\u5e8f\u5bf9\u5148\u884c\u53d1\u751f\u6ca1\u6709\u592a\u5927\u7684\u5173\u7cfb\uff0c\u6240\u4ee5\u8861\u91cf\u5e76\u53d1\u5b89\u5168\u95ee\u9898\u7684\u65f6\u5019\u4e0d\u8981\u53d7\u5230\u65f6\u95f4\u987a\u5e8f\u7684\u5f71\u54cd\uff0c\u4e00\u5207\u4ee5\u5148\u884c\u53d1\u751f\u539f\u5219\u4e3a\u51c6\u3002 <\/p>\n<p>\u8f6c\u8f7d\u8bf7\u6ce8\u660e\uff1a<a href=\"http:\/\/weitaoc.com\">\u8ff7\u8def\u7684\u8001\u9f20<\/a> &raquo; <a href=\"http:\/\/weitaoc.com\/?p=533\">\u5148\u884c\u53d1\u751f\u539f\u5219\uff08Happens-before\uff09<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>\u5148\u884c\u53d1\u751f\u539f\u5219\uff08Happens-Before\uff09\u662f\u5224\u65ad\u6570\u636e\u662f\u5426\u5b58\u5728\u7ade\u4e89\u3001\u7ebf\u7a0b\u662f\u5426\u5b89\u5168\u7684\u4e3b\u8981\u4f9d\u636e\u3002 \u5148\u884c\u53d1\u751f\u662fJava\u5185\u5b58\uff0c\u6a21\u578b\u4e2d\u5b9a\u4e49\u7684\u4e24\u9879\u64cd\u4f5c\u4e4b\u95f4\u7684\u504f\u5e8f\u5173\u7cfb\uff0c\u5982\u679c\u64cd\u4f5cA\u5148\u884c\u53d1\u751f\u4e8e\u64cd\u4f5cB\uff0c\u90a3\u4e48\u64cd\u4f5cA\u4ea7\u751f\u7684\u5f71\u54cd\u80fd\u591f\u88ab\u64cd\u4f5cB\u89c2\u5bdf\u5230\u3002 Java\u5185\u5b58\u6a21\u578b\u4e2d\u5b58\u5728\u7684\u5929 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[57],"tags":[59,60],"class_list":["post-533","post","type-post","status-publish","format-standard","hentry","category-java","tag-java","tag-60"],"views":8521,"_links":{"self":[{"href":"http:\/\/weitaoc.com\/index.php?rest_route=\/wp\/v2\/posts\/533","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/weitaoc.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/weitaoc.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/weitaoc.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/weitaoc.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=533"}],"version-history":[{"count":2,"href":"http:\/\/weitaoc.com\/index.php?rest_route=\/wp\/v2\/posts\/533\/revisions"}],"predecessor-version":[{"id":537,"href":"http:\/\/weitaoc.com\/index.php?rest_route=\/wp\/v2\/posts\/533\/revisions\/537"}],"wp:attachment":[{"href":"http:\/\/weitaoc.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=533"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/weitaoc.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=533"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/weitaoc.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=533"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}