{"id":60189,"date":"2024-10-13T00:47:21","date_gmt":"2024-10-12T16:47:21","guid":{"rendered":"https:\/\/server.hk\/cnblog\/60189\/"},"modified":"2024-10-13T00:47:21","modified_gmt":"2024-10-12T16:47:21","slug":"c%e8%aa%9e%e8%a8%80%e6%95%b8%e6%93%9a%e5%ba%ab%e5%96%ae%e4%be%8b%e6%a8%a1%e5%bc%8f%e7%b7%9a%e7%a8%8b%e5%ae%89%e5%85%a8%e8%a9%b3%e8%a7%a3-c%e6%95%b8%e6%93%9a%e5%ba%ab%e5%96%ae%e4%be%8b%e6%a8%a1","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/60189\/","title":{"rendered":"C\u8a9e\u8a00\u6578\u64da\u5eab\u55ae\u4f8b\u6a21\u5f0f\u7dda\u7a0b\u5b89\u5168\u8a73\u89e3 (c\u6578\u64da\u5eab\u55ae\u4f8b\u6a21\u5f0f\u7dda\u7a0b\u5b89\u5168)"},"content":{"rendered":"<h1 id=\"c%e8%aa%9e%e8%a8%80%e6%95%b8%e6%93%9a%e5%ba%ab%e5%96%ae%e4%be%8b%e6%a8%a1%e5%bc%8f%e7%b7%9a%e7%a8%8b%e5%ae%89%e5%85%a8%e8%a9%b3%e8%a7%a3-iHbUXZkekj\">C\u8a9e\u8a00\u6578\u64da\u5eab\u55ae\u4f8b\u6a21\u5f0f\u7dda\u7a0b\u5b89\u5168\u8a73\u89e3<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u8edf\u4ef6\u958b\u767c\u4e2d\uff0c\u6578\u64da\u5eab\u7684\u8a2a\u554f\u548c\u7ba1\u7406\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002\u5c24\u5176\u662f\u5728\u591a\u7dda\u7a0b\u74b0\u5883\u4e2d\uff0c\u5982\u4f55\u5b89\u5168\u5730\u8a2a\u554f\u6578\u64da\u5eab\u6210\u70ba\u4e86\u4e00\u500b\u6311\u6230\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0eC\u8a9e\u8a00\u4e2d\u7684\u6578\u64da\u5eab\u55ae\u4f8b\u6a21\u5f0f\u53ca\u5176\u7dda\u7a0b\u5b89\u5168\u6027\uff0c\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u597d\u5730\u7406\u89e3\u548c\u5be6\u73fe\u9019\u4e00\u6a21\u5f0f\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e5%96%ae%e4%be%8b%e6%a8%a1%e5%bc%8f%ef%bc%9f-iHbUXZkekj\">\u4ec0\u9ebc\u662f\u55ae\u4f8b\u6a21\u5f0f\uff1f<\/h2>\n<p>\u55ae\u4f8b\u6a21\u5f0f\u662f\u4e00\u7a2e\u8a2d\u8a08\u6a21\u5f0f\uff0c\u65e8\u5728\u78ba\u4fdd\u4e00\u500b\u985e\u53ea\u6709\u4e00\u500b\u5be6\u4f8b\uff0c\u4e26\u63d0\u4f9b\u5168\u5c40\u8a2a\u554f\u9ede\u3002\u9019\u5728\u6578\u64da\u5eab\u9023\u63a5\u7684\u60c5\u5883\u4e2d\u5c24\u70ba\u91cd\u8981\uff0c\u56e0\u70ba\u904e\u591a\u7684\u9023\u63a5\u6703\u5c0e\u81f4\u8cc7\u6e90\u6d6a\u8cbb\u548c\u6027\u80fd\u4e0b\u964d\u3002<\/p>\n<h2 id=\"%e7%82%ba%e4%bb%80%e9%ba%bc%e9%9c%80%e8%a6%81%e7%b7%9a%e7%a8%8b%e5%ae%89%e5%85%a8%ef%bc%9f-iHbUXZkekj\">\u70ba\u4ec0\u9ebc\u9700\u8981\u7dda\u7a0b\u5b89\u5168\uff1f<\/h2>\n<p>\u5728\u591a\u7dda\u7a0b\u61c9\u7528\u4e2d\uff0c\u82e5\u591a\u500b\u7dda\u7a0b\u540c\u6642\u8a2a\u554f\u540c\u4e00\u8cc7\u6e90\uff0c\u53ef\u80fd\u6703\u5c0e\u81f4\u6578\u64da\u4e0d\u4e00\u81f4\u6216\u7a0b\u5e8f\u5d29\u6f70\u3002\u56e0\u6b64\uff0c\u78ba\u4fdd\u55ae\u4f8b\u6a21\u5f0f\u7684\u7dda\u7a0b\u5b89\u5168\u6027\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002\u9019\u610f\u5473\u8457\u5728\u591a\u500b\u7dda\u7a0b\u5617\u8a66\u5275\u5efa\u55ae\u4f8b\u5be6\u4f8b\u6642\uff0c\u5fc5\u9808\u6709\u6a5f\u5236\u4f86\u9632\u6b62\u540c\u6642\u5275\u5efa\u591a\u500b\u5be6\u4f8b\u3002<\/p>\n<h2 id=\"c%e8%aa%9e%e8%a8%80%e4%b8%ad%e7%9a%84%e5%96%ae%e4%be%8b%e6%a8%a1%e5%bc%8f%e5%af%a6%e7%8f%be-iHbUXZkekj\">C\u8a9e\u8a00\u4e2d\u7684\u55ae\u4f8b\u6a21\u5f0f\u5be6\u73fe<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684C\u8a9e\u8a00\u55ae\u4f8b\u6a21\u5f0f\u7684\u5be6\u73fe\u793a\u4f8b\uff1a<\/p>\n<pre><code>\n#include &lt;stdio.h&gt;\n#include &lt;stdlib.h&gt;\n#include &lt;pthread.h&gt;\n\ntypedef struct {\n    \/\/ \u6578\u64da\u5eab\u9023\u63a5\u5c6c\u6027\n    int connection_id;\n} Database;\n\nDatabase* instance = NULL;\npthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;\n\nDatabase* get_instance() {\n    if (instance == NULL) {\n        pthread_mutex_lock(&amp;mutex);\n        if (instance == NULL) {\n            instance = (Database*)malloc(sizeof(Database));\n            instance-&gt;connection_id = 1; \/\/ \u5047\u8a2d\u7684\u9023\u63a5ID\n        }\n        pthread_mutex_unlock(&amp;mutex);\n    }\n    return instance;\n}\n<\/code><\/pre>\n<h3 id=\"%e4%bb%a3%e7%a2%bc%e8%a7%a3%e6%9e%90-iHbUXZkekj\">\u4ee3\u78bc\u89e3\u6790<\/h3>\n<ul>\n<li><strong>\u5168\u5c40\u8b8a\u91cf\uff1a<\/strong>\u6211\u5011\u5b9a\u7fa9\u4e86\u4e00\u500b\u5168\u5c40\u8b8a\u91cf`instance`\u4f86\u5b58\u5132\u55ae\u4f8b\u5be6\u4f8b\u3002<\/li>\n<li><strong>\u4e92\u65a5\u9396\uff1a<\/strong>\u4f7f\u7528`pthread_mutex_t`\u4f86\u78ba\u4fdd\u7dda\u7a0b\u5b89\u5168\u3002<\/li>\n<li><strong>\u96d9\u91cd\u6aa2\u67e5\u9396\u5b9a\uff1a<\/strong>\u5728`get_instance`\u51fd\u6578\u4e2d\uff0c\u9996\u5148\u6aa2\u67e5`instance`\u662f\u5426\u70baNULL\uff0c\u7136\u5f8c\u9396\u5b9a\u4e92\u65a5\u9396\uff0c\u518d\u6b21\u6aa2\u67e5\u4ee5\u78ba\u4fdd\u53ea\u6709\u4e00\u500b\u5be6\u4f8b\u88ab\u5275\u5efa\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b7%9a%e7%a8%8b%e5%ae%89%e5%85%a8%e7%9a%84%e8%80%83%e9%87%8f-iHbUXZkekj\">\u7dda\u7a0b\u5b89\u5168\u7684\u8003\u91cf<\/h2>\n<p>\u5728\u5be6\u73fe\u55ae\u4f8b\u6a21\u5f0f\u6642\uff0c\u7dda\u7a0b\u5b89\u5168\u7684\u8003\u91cf\u4e3b\u8981\u96c6\u4e2d\u5728\u4ee5\u4e0b\u5e7e\u500b\u65b9\u9762\uff1a<\/p>\n<ul>\n<li><strong>\u6027\u80fd\uff1a<\/strong>\u904e\u591a\u7684\u9396\u5b9a\u6703\u5f71\u97ff\u6027\u80fd\uff0c\u56e0\u6b64\u61c9\u8b39\u614e\u4f7f\u7528\u3002<\/li>\n<li><strong>\u6b7b\u9396\uff1a<\/strong>\u78ba\u4fdd\u5728\u9396\u5b9a\u548c\u89e3\u9396\u6642\u4e0d\u6703\u767c\u751f\u6b7b\u9396\u60c5\u6cc1\u3002<\/li>\n<li><strong>\u8cc7\u6e90\u7ba1\u7406\uff1a<\/strong>\u78ba\u4fdd\u5728\u4e0d\u518d\u9700\u8981\u6642\u91cb\u653e\u8cc7\u6e90\uff0c\u907f\u514d\u5167\u5b58\u6cc4\u6f0f\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b5%90%e8%ab%96-iHbUXZkekj\">\u7d50\u8ad6<\/h2>\n<p>\u5728C\u8a9e\u8a00\u4e2d\u5be6\u73fe\u6578\u64da\u5eab\u55ae\u4f8b\u6a21\u5f0f\u7684\u7dda\u7a0b\u5b89\u5168\u6027\u662f\u4e00\u500b\u91cd\u8981\u7684\u8ab2\u984c\u3002\u901a\u904e\u4f7f\u7528\u4e92\u65a5\u9396\u548c\u96d9\u91cd\u6aa2\u67e5\u9396\u5b9a\uff0c\u6211\u5011\u53ef\u4ee5\u6709\u6548\u5730\u78ba\u4fdd\u5728\u591a\u7dda\u7a0b\u74b0\u5883\u4e2d\u5b89\u5168\u5730\u8a2a\u554f\u6578\u64da\u5eab\u3002\u9019\u4e0d\u50c5\u63d0\u9ad8\u4e86\u61c9\u7528\u7684\u7a69\u5b9a\u6027\uff0c\u9084\u80fd\u63d0\u5347\u6027\u80fd\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684\u89e3\u6c7a\u65b9\u6848\u4f86\u7ba1\u7406\u60a8\u7684\u6578\u64da\u5eab\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u4f86\u63d0\u4f9b\u7a69\u5b9a\u7684\u652f\u6301\u548c\u6027\u80fd\u3002\u7121\u8ad6\u662f\u6578\u64da\u5eab\u7ba1\u7406\u9084\u662f\u5176\u4ed6\u61c9\u7528\uff0c\u9078\u64c7\u5408\u9069\u7684\u670d\u52d9\u5668\u67b6\u69cb\u90fd\u662f\u6210\u529f\u7684\u95dc\u9375\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6df1\u5165\u63a2\u8a0eC\u8a9e\u8a00\u6578\u64da\u5eab\u55ae\u4f8b\u6a21\u5f0f\u7684\u5be6\u73fe\uff0c\u78ba\u4fdd\u7dda\u7a0b\u5b89\u5168\uff0c\u63d0\u5347\u61c9\u7528\u6027\u80fd\u8207\u7a69\u5b9a\u6027\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-60189","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60189","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=60189"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60189\/revisions"}],"predecessor-version":[{"id":60190,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60189\/revisions\/60190"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=60189"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=60189"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=60189"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}