{"id":10075,"date":"2023-11-28T21:25:58","date_gmt":"2023-11-28T13:25:58","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=10075"},"modified":"2023-12-07T10:48:19","modified_gmt":"2023-12-07T02:48:19","slug":"java-zhongvolatile-guan-jian-zi-de-yuan-li-shi-she","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/11\/28\/java-zhongvolatile-guan-jian-zi-de-yuan-li-shi-she\/","title":{"rendered":"Java\u4e2dvolatile\u5173\u952e\u5b57\u7684\u539f\u7406\u662f\u4ec0\u4e48\uff1f\u5e72\u4ec0\u4e48\u7528\u7684\uff1f"},"content":{"rendered":"<p><code>volatile<\/code> \u662fJava\u4e2d\u7684\u5173\u952e\u5b57\uff0c\u7528\u4e8e\u4fee\u9970\u53d8\u91cf\u3002\u4f7f\u7528 <code>volatile<\/code> \u5173\u952e\u5b57\u4fee\u9970\u7684\u53d8\u91cf\u5177\u6709\u4ee5\u4e0b\u4e24\u4e2a\u7279\u6027\uff1a<\/p>\n<ol>\n<li>\n<strong>\u53ef\u89c1\u6027\uff08Visibility\uff09\uff1a<\/strong> \u5f53\u4e00\u4e2a\u7ebf\u7a0b\u4fee\u6539\u4e86 <code>volatile<\/code> \u53d8\u91cf\u7684\u503c\uff0c\u8be5\u53d8\u91cf\u5bf9\u5176\u4ed6\u7ebf\u7a0b\u662f\u53ef\u89c1\u7684\u3002\u8fd9\u662f\u56e0\u4e3a\u88ab <code>volatile<\/code> \u4fee\u9970\u7684\u53d8\u91cf\u4f1a\u5728\u4fee\u6539\u540e\u7acb\u5373\u540c\u6b65\u5230\u4e3b\u5185\u5b58\uff0c\u5176\u4ed6\u7ebf\u7a0b\u5728\u8bfb\u53d6\u8fd9\u4e2a\u53d8\u91cf\u65f6\u4f1a\u4ece\u4e3b\u5185\u5b58\u4e2d\u83b7\u53d6\u6700\u65b0\u7684\u503c\u3002\n<\/li>\n<li>\n<strong>\u7981\u6b62\u6307\u4ee4\u91cd\u6392\u5e8f\uff08Prevent Instruction Reordering\uff09\uff1a<\/strong> <code>volatile<\/code> \u53d8\u91cf\u7684\u8bfb\u5199\u64cd\u4f5c\u5728\u6307\u4ee4\u5c42\u9762\u4e0a\u4f1a\u88ab\u7981\u6b62\u91cd\u6392\u5e8f\uff0c\u4fdd\u8bc1\u4e86\u53d8\u91cf\u7684\u6709\u5e8f\u6027\u3002\n<\/li>\n<\/ol>\n<h3><a id=\"%E5%8E%9F%E7%90%86%EF%BC%9A\" class=\"anchor\" aria-hidden=\"true\"><span class=\"octicon octicon-link\"><\/span><\/a>\u539f\u7406\uff1a<\/h3>\n<p>\u5728 Java \u865a\u62df\u673a\u4e2d\uff0c\u6bcf\u4e2a\u7ebf\u7a0b\u90fd\u6709\u81ea\u5df1\u7684\u5de5\u4f5c\u5185\u5b58\uff0c\u7528\u4e8e\u5b58\u50a8\u5176\u6b63\u5728\u4f7f\u7528\u7684\u53d8\u91cf\u7684\u526f\u672c\u3002\u5f53\u4e00\u4e2a\u7ebf\u7a0b\u4fee\u6539\u4e00\u4e2a\u53d8\u91cf\u65f6\uff0c\u5b83\u9996\u5148\u4f1a\u5728\u81ea\u5df1\u7684\u5de5\u4f5c\u5185\u5b58\u4e2d\u8fdb\u884c\u4fee\u6539\uff0c\u7136\u540e\u5c06\u8fd9\u4e2a\u4fee\u6539\u540c\u6b65\u5230\u4e3b\u5185\u5b58\u3002\u5176\u4ed6\u7ebf\u7a0b\u5728\u8bfb\u53d6\u8fd9\u4e2a\u53d8\u91cf\u65f6\uff0c\u9996\u5148\u4f1a\u4ece\u4e3b\u5185\u5b58\u4e2d\u83b7\u53d6\u6700\u65b0\u7684\u503c\uff0c\u7136\u540e\u5c06\u8fd9\u4e2a\u503c\u590d\u5236\u5230\u81ea\u5df1\u7684\u5de5\u4f5c\u5185\u5b58\u4e2d\u3002<\/p>\n<p>\u4f7f\u7528 <code>volatile<\/code> \u4fee\u9970\u7684\u53d8\u91cf\uff0c\u5176\u8bfb\u5199\u64cd\u4f5c\u5177\u6709\u7279\u6b8a\u7684\u8bed\u4e49\uff0c\u4fdd\u8bc1\u4e86\u53ef\u89c1\u6027\u548c\u6709\u5e8f\u6027\uff1a<\/p>\n<ul>\n<li>\n<strong>\u53ef\u89c1\u6027\uff1a<\/strong> \u5f53\u4e00\u4e2a\u7ebf\u7a0b\u4fee\u6539\u4e86 <code>volatile<\/code> \u53d8\u91cf\u7684\u503c\uff0c\u8fd9\u4e2a\u4fee\u6539\u4f1a\u7acb\u5373\u540c\u6b65\u5230\u4e3b\u5185\u5b58\u3002\u5176\u4ed6\u7ebf\u7a0b\u5728\u8bfb\u53d6\u8fd9\u4e2a\u53d8\u91cf\u65f6\u4f1a\u4ece\u4e3b\u5185\u5b58\u4e2d\u83b7\u53d6\u6700\u65b0\u7684\u503c\uff0c\u800c\u4e0d\u662f\u4f7f\u7528\u81ea\u5df1\u5de5\u4f5c\u5185\u5b58\u4e2d\u7684\u526f\u672c\u3002\n<\/li>\n<li>\n<strong>\u7981\u6b62\u6307\u4ee4\u91cd\u6392\u5e8f\uff1a<\/strong> <code>volatile<\/code> \u53d8\u91cf\u7684\u8bfb\u5199\u64cd\u4f5c\u5728\u6307\u4ee4\u5c42\u9762\u4e0a\u4f1a\u88ab\u7981\u6b62\u91cd\u6392\u5e8f\u3002\u8fd9\u610f\u5473\u7740 <code>volatile<\/code> \u53d8\u91cf\u7684\u5199\u5165\u64cd\u4f5c\u4e0d\u4f1a\u88ab\u91cd\u6392\u5e8f\u5230\u5176\u540e\u9762\u7684\u8bfb\u53d6\u64cd\u4f5c\u4e4b\u524d\u3002\n<\/li>\n<\/ul>\n<h3><a id=\"%E7%94%A8%E9%80%94%EF%BC%9A\" class=\"anchor\" aria-hidden=\"true\"><span class=\"octicon octicon-link\"><\/span><\/a>\u7528\u9014\uff1a<\/h3>\n<ol>\n<li>\n<strong>\u4fdd\u8bc1\u53d8\u91cf\u7684\u53ef\u89c1\u6027\uff1a<\/strong> \u5f53\u591a\u4e2a\u7ebf\u7a0b\u540c\u65f6\u8bbf\u95ee\u4e00\u4e2a\u53d8\u91cf\u4e14\u5176\u4e2d\u4e00\u4e2a\u7ebf\u7a0b\u5bf9\u8fd9\u4e2a\u53d8\u91cf\u8fdb\u884c\u4e86\u4fee\u6539\u65f6\uff0c<code>volatile<\/code> \u5173\u952e\u5b57\u4fdd\u8bc1\u4e86\u6240\u6709\u7ebf\u7a0b\u90fd\u80fd\u591f\u770b\u5230\u53d8\u91cf\u7684\u6700\u65b0\u503c\u3002\n<\/li>\n<li>\n<strong>\u7981\u6b62\u6307\u4ee4\u91cd\u6392\u5e8f\uff1a<\/strong> <code>volatile<\/code> \u5173\u952e\u5b57\u7981\u6b62\u6307\u4ee4\u91cd\u6392\u5e8f\uff0c\u786e\u4fdd\u4e86\u5728\u591a\u7ebf\u7a0b\u73af\u5883\u4e2d\u53d8\u91cf\u64cd\u4f5c\u7684\u6709\u5e8f\u6027\u3002\n<\/li>\n<\/ol>\n<p><strong>\u6ce8\u610f\uff1a<\/strong> \u867d\u7136 <code>volatile<\/code> \u63d0\u4f9b\u4e86\u53ef\u89c1\u6027\u548c\u7981\u6b62\u6307\u4ee4\u91cd\u6392\u5e8f\u7684\u7279\u6027\uff0c\u4f46\u5b83\u5e76\u4e0d\u80fd\u4fdd\u8bc1\u539f\u5b50\u6027\u3002\u5728\u9700\u8981\u4fdd\u8bc1\u539f\u5b50\u6027\u7684\u64cd\u4f5c\u4e2d\uff0c\u8fd8\u9700\u8981\u4f7f\u7528\u5176\u4ed6\u624b\u6bb5\uff0c\u6bd4\u5982\u4f7f\u7528 <code>synchronized<\/code> \u5173\u952e\u5b57\u6216\u8005 <code>java.util.concurrent<\/code> \u5305\u63d0\u4f9b\u7684\u539f\u5b50\u7c7b\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>volatile \u662fJava\u4e2d\u7684\u5173\u952e\u5b57\uff0c\u7528\u4e8e\u4fee\u9970\u53d8\u91cf\u3002\u4f7f\u7528 volatile \u5173\u952e\u5b57\u4fee\u9970\u7684\u53d8\u91cf\u5177\u6709\u4ee5\u4e0b\u4e24\u4e2a\u7279\u6027 [&hellip;]<\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[119],"tags":[],"class_list":["post-10075","post","type-post","status-publish","format-standard","hentry","category-jvm"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/10075","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\/9"}],"replies":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/comments?post=10075"}],"version-history":[{"count":2,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/10075\/revisions"}],"predecessor-version":[{"id":16796,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/10075\/revisions\/16796"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=10075"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=10075"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=10075"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}