{"id":129565,"date":"2024-10-26T22:35:07","date_gmt":"2024-10-26T14:35:07","guid":{"rendered":"https:\/\/server.hk\/cnblog\/129565\/"},"modified":"2024-10-26T22:35:08","modified_gmt":"2024-10-26T14:35:08","slug":"redis%e8%b7%b3%e8%ba%8d%e6%8e%a2%e7%b4%a2%e6%ba%90%e7%a2%bc%e7%9a%84%e9%ad%85%e5%8a%9b%ef%bc%88redis%e8%b7%b3%e8%ba%8d%e6%ba%90%e7%a2%bc%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/129565\/","title":{"rendered":"Redis\u8df3\u8e8d\u63a2\u7d22\u6e90\u78bc\u7684\u9b45\u529b\uff08redis\u8df3\u8e8d\u6e90\u78bc\uff09"},"content":{"rendered":"<h1 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id=\"%e6%ba%90%e7%a2%bc%e5%88%86%e6%9e%90-YpAZkSGREt\">\u6e90\u78bc\u5206\u6790<\/h3>\n<p>Redis\u7684\u8df3\u8e8d\u8868\u5be6\u73fe\u4f4d\u65bc\u5176\u6e90\u78bc\u4e2d\u7684`skiplist.c`\u6587\u4ef6\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u95dc\u9375\u7684\u6e90\u78bc\u7247\u6bb5\uff0c\u5e6b\u52a9\u8b80\u8005\u7406\u89e3\u5176\u5be6\u73fe\u908f\u8f2f\uff1a<\/p>\n<pre><code>\ntypedef struct skiplistNode {\n    struct skiplistNode *forward[];\n} skiplistNode;\n\ntypedef struct skiplist {\n    struct skiplistNode *header, *tail;\n    unsigned long length;\n    int level;\n} skiplist;\n<\/code><\/pre>\n<p>\u5728\u9019\u6bb5\u4ee3\u78bc\u4e2d\uff0c`skiplistNode`\u7d50\u69cb\u9ad4\u5b9a\u7fa9\u4e86\u8df3\u8e8d\u8868\u7684\u7bc0\u9ede\uff0c`forward`\u6578\u7d44\u7528\u65bc\u5b58\u5132\u6307\u5411\u4e0b\u4e00\u5c64\u7bc0\u9ede\u7684\u6307\u91dd\u3002\u800c`skiplist`\u7d50\u69cb\u9ad4\u5247\u5305\u542b\u4e86\u8df3\u8e8d\u8868\u7684\u982d\u7bc0\u9ede\u3001\u5c3e\u7bc0\u9ede\u3001\u9577\u5ea6\u548c\u7576\u524d\u5c64\u6578\u7b49\u4fe1\u606f\u3002<\/p>\n<h3 id=\"%e6%8f%92%e5%85%a5%e8%88%87%e6%9f%a5%e6%89%be%e6%93%8d%e4%bd%9c-YpAZkSGREt\">\u63d2\u5165\u8207\u67e5\u627e\u64cd\u4f5c<\/h3>\n<p>\u63d2\u5165\u64cd\u4f5c\u7684\u6838\u5fc3\u5728\u65bc\u96a8\u6a5f\u5c64\u6578\u7684\u751f\u6210\uff0c\u4ee5\u4e0b\u662f\u63d2\u5165\u64cd\u4f5c\u7684\u7c21\u5316\u4ee3\u78bc\uff1a<\/p>\n<pre><code>\nvoid insert(skiplist *list, int score, char *value) {\n    skiplistNode *update[MAXLEVEL];\n    skiplistNode *x = list-&gt;header;\n\n    for (int i = list-&gt;level - 1; i &gt;= 0; i--) {\n        while (x-&gt;forward[i] != NULL &amp;&amp; x-&gt;forward[i]-&gt;score forward[i];\n        }\n        update[i] = x;\n    }\n    \/\/ \u96a8\u6a5f\u5c64\u6578\u751f\u6210\n    int level = randomLevel();\n    \/\/ \u5275\u5efa\u65b0\u7bc0\u9ede\n    skiplistNode *newNode = createNode(level, score, value);\n    \/\/ \u66f4\u65b0\u6307\u91dd\n    for (int i = 0; i &lt;= level; i++) {\n        newNode-&gt;forward[i] = update[i]-&gt;forward[i];\n        update[i]-&gt;forward[i] = newNode;\n    }\n}\n<\/code><\/pre>\n<p>\u67e5\u627e\u64cd\u4f5c\u5247\u662f\u901a\u904e\u9010\u5c64\u5411\u4e0b\u7684\u65b9\u5f0f\u4f86\u5be6\u73fe\uff0c\u9019\u6a23\u53ef\u4ee5\u6709\u6548\u5730\u6e1b\u5c11\u67e5\u627e\u7684\u6642\u9593\u3002<\/p>\n<h2 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