\u5f53\u7a0b\u5e8f\u66f4\u65b0\u4e00\u4e2a\u53d8\u91cf\u65f6\uff0c\u5982\u679c\u591a\u7ebf\u7a0b\u540c\u65f6\u66f4\u65b0\u8fd9\u4e2a\u53d8\u91cf\uff0c\u53ef\u80fd\u5f97\u5230\u671f\u671b\u4e4b\u5916\u7684\u503c\uff0c\u6bd4\u5982\u53d8\u91cf i=l, A\u7ebf\u7a0b\u66f4\u65b0i+1, B\u7ebf\u7a0b\u4e5f\u66f4\u65b0i+1,\u7ecf\u8fc7\u4e24\u4e2a\u7ebf\u7a0b\u64cd\u4f5c\u4e4b\u540e\u53ef\u80fdi\u4e0d\u7b49\u4e8e3,\u800c\u662f\u7b49\u4e8e2\u3002 \u56e0\u4e3aA\u548cB\u7ebf\u7a0b\u5728\u66f4\u65b0\u53d8\u91cfi\u7684\u65f6\u5019\u62ff\u5230\u7684i\u90fd\u662f1,\u8fd9\u5c31\u662f\u7ebf\u7a0b\u4e0d\u5b89\u5168\u7684\u66f4\u65b0\u64cd\u4f5c\uff0c\u901a\u5e38\u6211 \u4eec\u4f1a\u4f7f\u7528synchronized\u6765\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\uff0csynchronized\u4f1a\u4fdd\u8bc1\u591a\u7ebf\u7a0b\u4e0d\u4f1a\u540c\u65f6\u66f4\u65b0\u53d8\u91cfi\u3002
\n\u800c Java \u4ece JDK 1.5 \u5f00\u59cb\u63d0\u4f9b\u4e86 java.util.concurrent.atomic \u5305\uff08\u4ee5\u4e0b\u7b80\u79f0 Atomic \u5305\uff09\uff0c\u8fd9 \u4e2a\u5305\u4e2d\u7684\u539f\u5b50\u64cd\u4f5c\u7c7b\u63d0\u4f9b\u4e86\u4e00\u79cd\u7528\u6cd5\u7b80\u5355\u3001\u6027\u80fd\u9ad8\u6548\u3001\u7ebf\u7a0b\u5b89\u5168\u5730\u66f4\u65b0\u4e00\u4e2a\u53d8\u91cf\u7684\u65b9\u5f0f\u3002
\n\u56e0\u4e3a\u53d8\u91cf\u7684\u7c7b\u578b\u6709\u5f88\u591a\u79cd\uff0c\u6240\u4ee5\u5728Atomic\u5305\u91cc\u4e5f\u63d0\u4f9b\u4e86\u5f88\u591a\u7c7b\uff0c\u5927\u81f4\u53ef\u4ee5\u5c5e\u4e8e4\u79cd\u7c7b\u578b\u7684\u539f \u5b50\u66f4\u65b0\u65b9\u5f0f\uff0c\u5206\u522b\u662f\u539f\u5b50\u66f4\u65b0\u57fa\u672c\u7c7b\u578b\u3001\u539f\u5b50\u66f4\u65b0\u6570\u7ec4\u3001\u539f\u5b50\u66f4\u65b0\u5f15\u7528\u548c\u539f\u5b50\u66f4\u65b0\u5c5e\u6027(\u5b57\u6bb5)\u3002 Atomic\u5305\u91cc\u7684\u7c7b\u57fa\u672c\u90fd\u662f\u4f7f\u7528Unsafe\u5b9e\u73b0\u7684\u5305\u88c5\u7c7b\u3002
\n\u539f\u5b50\u66f4\u65b0\u57fa\u672c\u7c7b\u578b
\n\u4f7f\u7528\u539f\u5b50\u7684\u65b9\u5f0f\u66f4\u65b0\u57fa\u672c\u7c7b\u578b\uff0cAtomic\u5305\u63d0\u4f9b\u4e86\u4ee5\u4e0b3\u4e2a\u7c7b\uff1a
\n1\u3001\tAtomicBoolean\uff1a\u539f\u5b50\u66f4\u65b0\u5e03\u5c14\u7c7b\u578b\u3002
\n2\u3001\tAtomiclnteger\uff1a\u539f\u5b50\u66f4\u65b0\u6574\u578b\u3002
\n3\u3001\tAtomicLong\uff1a\u539f\u5b50\u66f4\u65b0Long\u7c7b\u578b\u3002
\n\u4ee5\u4e0a3\u4e2a\u7c7b\u63d0\u4f9b\u7684\u65b9\u6cd5\u51e0\u4e4e\u4e00\u6a21\u4e00\u6837\uff0c\u6240\u4ee5\u672c\u8282\u4ec5\u4ee5Atomiclnteger\u4e3a\u4f8b\u8fdb\u884c\u8bb2\u89e3\uff0c
\nAtomiclnteger\u7684\u5e38\u7528\u65b9\u6cd5\u5982\u4e0b\uff1a
\n1\u3001\tint addAndGet (int delta):\u4ee5\u539f\u5b50\u65b9\u5f0f\u5c06\u8f93\u5165\u7684\u6570\u503c\u4e0e\u5b9e\u4f8b\u4e2d\u7684\u503c(Atomiclnteger \u91cc\u7684value)\u76f8\u52a0\uff0c\u5e76\u8fd4\u56de\u7ed3\u679c\u3002
\n2\u3001\tboolean compareAndSet(int expect, int update):\u5982\u679c\u8f93\u5165\u7684\u6570\u503c\u7b49\u4e8e\u9884\u671f\u503c\uff0c\u5219\u4ee5 \u539f\u5b50\u65b9\u5f0f\u5c06\u8be5\u503c\u8bbe\u7f6e\u4e3a\u8f93\u5165\u7684\u503c\u3002
\n3\u3001\tint getAndIncrement():\u4ee5\u539f\u5b50\u65b9\u5f0f\u5c06\u5f53\u524d\u503c\u52a01,\u6ce8\u610f\uff0c\u8fd9\u91cc\u8fd4\u56de\u7684\u662f\u81ea\u589e\u524d\u7684\u503c\u3002
\n4\u3001\tint getAndSet (int newValue):\u4ee5\u539f\u5b50\u65b9\u5f0f\u8bbe\u7f6e\u4e3anewValue\u7684\u503c\uff0c\u5e76\u8fd4\u56de\u65e7\u503c\u3002
\n5\u3001\tvoid lazySet (int newValue):\u6700\u7ec8\u4f1a\u8bbe\u7f6e\u6210 newValue,\u4f7f\u7528 lazySet \u8bbe\u7f6e\u503c\u540e\uff0c\u53ef \u80fd\u5bfc\u81f4\u5176\u4ed6\u7ebf\u7a0b\u5728\u4e4b\u540e\u7684\u4e00\u5c0f\u6bb5\u65f6\u95f4\u5185\u8fd8\u662f\u53ef\u4ee5\u8bfb\u5230\u65e7\u7684\u503c\u3002\u5173\u4e8e\u8be5\u65b9\u6cd5\u7684\u66f4\u591a\u4fe1\u606f\u53ef\u4ee5\u53c2\u8003 \u5e76\u53d1\u7f16\u7a0b\u7f51\u7ffb\u8bd1\u7684\u4e00\u7bc7\u6587\u7ae0\u300aAtomicLong.lazySet\u662f\u5982\u4f55\u5de5\u4f5c\u7684\uff1f\u300b\u3002
\n6\u3001\tint getAndSet (int newValue):\u4ee5\u539f\u5b50\u65b9\u5f0f\u8bbe\u7f6e\u4e3anewValue\u7684\u503c\uff0c\u5e76\u8fd4\u56de\u65e7\u503c
\n\u539f\u5b50\u66f4\u65b0\u6570\u7ec4
\n\u901a\u8fc7\u539f\u5b50\u7684\u65b9\u5f0f\u66f4\u65b0\u6570\u7ec4\u91cc\u7684\u67d0\u4e2a\u5143\u7d20\uff0cAtomic\u5305\u63d0\u4f9b\u4e86\u4e00\u4e0b4\u4e2a\u7c7b\uff1a
\n1\u3001\tAtomicIntegerArray\uff1a\u539f\u5b50\u66f4\u65b0\u6574\u578b\u6570\u7ec4\u91cc\u7684\u5143\u7d20\u3002
\n2\u3001\tAtomicLongArray:\u539f\u5b50\u66f4\u65b0\u957f\u6574\u578b\u6570\u7ec4\u91cc\u7684\u5143\u7d20\u3002
\n3\u3001\tAtomicReferenceArray:\u539f\u5b50\u66f4\u65b0\u5f15\u7528\u7c7b\u578b\u6570\u7ec4\u91cc\u7684\u5143\u7d20\u3002
\n\u4e0a\u8ff0\u51e0\u4e2a\u7c7b\u63d0\u4f9b\u7684\u65b9\u6cd5\u51e0\u4e4e\u4e00\u6837\uff0c\u6211\u4eec\u4ee5AtomicIntegerArray\u7c7b\u4e3a\u4f8b\u8bb2\u89e3\uff0c\u5176\u5e38\u7528\u65b9\u6cd5\u5982\u4e0b:
\n1\u3001\tint addAndGet (int i , int delta):\u4ee5\u539f\u5b50\u65b9\u5f0f\u5c06\u8f93\u5165\u503c\u4e0e\u6570\u7ec4\u4e2d\u7d22\u5f15i\u7684\u5143\u7d20\u76f8\u52a0\u3002
\n2\u3001\tboolean compareAndSet(int i , int expect , int update):\u5982\u679c\u5f53\u524d\u503c\u7b49\u4e8e\u9884\u671f\u503c\uff0c \u5219\u4ee5\u539f\u5b50\u65b9\u5f0f\u5c06\u6570\u7ec4\u4f4d\u7f6ei\u7684\u5143\u7d20\u8bbe\u7f6e\u6210update\u503c\u3002
\n\u539f\u5b50\u66f4\u65b0\u5f15\u7528\u7c7b\u578b
\n\u539f\u5b50\u66f4\u65b0\u57fa\u672c\u7c7b\u578b\u7684Atomiclnterger,\u53ea\u80fd\u66f4\u65b0\u4e00\u4e2a\u53d8\u91cf\uff0c\u5982\u679c\u8981\u539f\u5b50\u66f4\u65b0\u591a\u4e2a\u53d8\u91cf\uff0c\u5c31\u9700 \u8981\u4f7f\u7528\u8fd9\u4e2a\u539f\u5b50\u66f4\u65b0\u5f15\u7528\u7c7b\u578b\u63d0\u4f9b\u7684\u7c7b\u3002Atomic\u5305\u63d0\u4f9b\u4e86\u4ee5\u4e0b3\u4e2a\u7c7b\uff1a
\n1\u3001\tAtomicReference:\u539f\u5b50\u66f4\u65b0\u5f15\u7528\u7c7b\u578b
\n2\u3001\tAtomicReferenceFieldUpdater:\u539f\u5b50\u66f4\u65b0\u5f15\u7528\u7c7b\u578b\u91cc\u7684\u5b57\u6bb5\u3002
\n3\u3001\tAtomicMarkab1eReference:\u539f\u5b50\u66f4\u65b0\u5e26\u6709\u6807\u8bb0\u4f4d\u7684\u5f15\u7528\u7c7b\u578b\u3002\u53ef\u4ee5\u539f\u5b50\u66f4\u65b0\u4e00\u4e2a\u5e03\u5c14\u7c7b \u578b\u7684\u6807\u8bb0\u4f4d\u548c\u5f15\u7528\u7c7b\u578b\u3002\u6784\u9020\u65b9\u6cd5\u662fAtomicMarkab1eReference (V initialRef, boolean initialMark)\u3002
\n\u539f\u5b50\u66f4\u65b0\u5b57\u6bb5\u7c7b
\n\u5982\u679c\u9700\u539f\u5b50\u5730\u66f4\u65b0\u67d0\u4e2a\u7c7b\u91cc\u7684\u67d0\u4e2a\u5b57\u6bb5\u65f6\uff0c\u5c31\u9700\u8981\u4f7f\u7528\u539f\u5b50\u66f4\u65b0\u5b57\u6bb5\u7c7b\uff0cAtomic\u5305\u63d0\u4f9b\u4e86\u4ee5 \u4e0b3\u4e2a\u7c7b\u8fdb\u884c\u539f\u5b50\u5b57\u6bb5\u66f4\u65b0\u3002
\n1\u3001\tAtomicIntegerFieldUpdater\uff1a\u539f\u5b50\u66f4\u65b0\u6574\u578b\u7684\u5b57\u6bb5\u7684\u66f4\u65b0\u5668\u3002
\n2\u3001\tAtomicLongFieldUpdater:\u539f\u5b50\u66f4\u65b0\u957f\u6574\u578b\u5b57\u6bb5\u7684\u66f4\u65b0\u5668\u3002
\n3\u3001\tAtomicStampedReference:\u539f\u5b50\u66f4\u65b0\u5e26\u6709\u7248\u672c\u53f7\u7684\u5f15\u7528\u7c7b\u578b\u3002\u8be5\u7c7b\u5c06\u6574\u6570\u503c\u4e0e\u5f15\u7528\u5173\u8054\u8d77 \u6765\uff0c\u53ef\u7528\u4e8e\u539f\u5b50\u7684\u66f4\u65b0\u6570\u636e\u548c\u6570\u636e\u7684\u7248\u672c\u53f7\uff0c\u53ef\u4ee5\u89e3\u51b3\u4f7f\u7528CAS\u8fdb\u884c\u539f\u5b50\u66f4\u65b0\u65f6\u53ef\u80fd\u51fa\u73b0\u7684 ABA\u95ee\u9898\u3002
\n\u8981\u60f3\u539f\u5b50\u5730\u66f4\u65b0\u5b57\u6bb5\u7c7b\u9700\u8981\u4e24\u6b65\u3002\u7b2c\u4e00\u6b65\uff0c\u56e0\u4e3a\u539f\u5b50\u66f4\u65b0\u5b57\u6bb5\u7c7b\u90fd\u662f\u62bd\u8c61\u7c7b\uff0c\u6bcf\u6b21\u4f7f\u7528\u7684\u65f6\u5019 \u5fc5\u987b\u4f7f\u7528\u9759\u6001\u65b9\u6cd5newUpdater()\u521b\u5efa\u4e00\u4e2a\u66f4\u65b0\u5668\uff0c\u5e76\u4e14\u9700\u8981\u8bbe\u7f6e\u60f3\u8981\u66f4\u65b0\u7684\u7c7b\u548c\u5c5e\u6027\u3002\u7b2c\u4e8c \u6b65\uff0c\u66f4\u65b0\u7c7b\u7684\u5b57\u6bb5(\u5c5e\u6027)\u5fc5\u987b\u4f7f\u7528public volatile\u4fee\u9970\u7b26\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5f53\u7a0b\u5e8f\u66f4\u65b0\u4e00\u4e2a\u53d8\u91cf\u65f6\uff0c\u5982\u679c\u591a\u7ebf\u7a0b\u540c\u65f6\u66f4\u65b0\u8fd9\u4e2a\u53d8\u91cf\uff0c\u53ef\u80fd\u5f97\u5230\u671f\u671b\u4e4b\u5916\u7684\u503c\uff0c\u6bd4\u5982\u53d8\u91cf i=l, A\u7ebf\u7a0b\u66f4\u65b0i+1, […]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[99],"tags":[],"class_list":["post-9441","post","type-post","status-publish","format-standard","hentry","category-javabase"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/9441","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=9441"}],"version-history":[{"count":1,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/9441\/revisions"}],"predecessor-version":[{"id":9442,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/9441\/revisions\/9442"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=9441"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=9441"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=9441"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}