{"id":145347,"date":"2024-11-01T10:21:20","date_gmt":"2024-11-01T02:21:20","guid":{"rendered":"https:\/\/server.hk\/cnblog\/145347\/"},"modified":"2024-11-01T10:21:21","modified_gmt":"2024-11-01T02:21:21","slug":"vc-%e7%a8%8b%e5%ba%8f%e8%a8%aa%e5%95%8f%e6%95%b8%e6%93%9a%e5%ba%ab%e5%a4%9a%e7%b7%9a%e7%a8%8b%e5%ae%89%e5%85%a8%e6%8a%80%e5%b7%a7-vc-%e8%a8%aa%e5%95%8f%e6%95%b8%e6%93%9a%e5%ba%ab%e5%a4%9a%e7%b7%9a","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/145347\/","title":{"rendered":"VC \u7a0b\u5e8f\u8a2a\u554f\u6578\u64da\u5eab\u591a\u7dda\u7a0b\u5b89\u5168\u6280\u5de7 (vc \u8a2a\u554f\u6578\u64da\u5eab\u591a\u7dda\u7a0b\u5b89\u5168)"},"content":{"rendered":"<h1 id=\"vc-%e7%a8%8b%e5%ba%8f%e8%a8%aa%e5%95%8f%e6%95%b8%e6%93%9a%e5%ba%ab%e5%a4%9a%e7%b7%9a%e7%a8%8b%e5%ae%89%e5%85%a8%e6%8a%80%e5%b7%a7-uRNiBzPvrH\">VC \u7a0b\u5e8f\u8a2a\u554f\u6578\u64da\u5eab\u591a\u7dda\u7a0b\u5b89\u5168\u6280\u5de7<\/h1>\n<p>\u5728\u73fe\u4ee3\u61c9\u7528\u7a0b\u5e8f\u958b\u767c\u4e2d\uff0c\u591a\u7dda\u7a0b\u7de8\u7a0b\u5df2\u6210\u70ba\u63d0\u9ad8\u6027\u80fd\u548c\u97ff\u61c9\u901f\u5ea6\u7684\u91cd\u8981\u624b\u6bb5\u3002\u7136\u800c\uff0c\u7576\u591a\u500b\u7dda\u7a0b\u540c\u6642\u8a2a\u554f\u6578\u64da\u5eab\u6642\uff0c\u53ef\u80fd\u6703\u5c0e\u81f4\u6578\u64da\u4e0d\u4e00\u81f4\u3001\u6b7b\u9396\u7b49\u554f\u984c\u3002\u56e0\u6b64\uff0c\u4e86\u89e3\u5982\u4f55\u5728 VC \u7a0b\u5e8f\u4e2d\u5b89\u5168\u5730\u8a2a\u554f\u6578\u64da\u5eab\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u4e00\u4e9b\u591a\u7dda\u7a0b\u5b89\u5168\u7684\u6280\u5de7\uff0c\u5e6b\u52a9\u958b\u767c\u8005\u6709\u6548\u7ba1\u7406\u6578\u64da\u5eab\u8a2a\u554f\u3002<\/p>\n<h2 id=\"1-%e4%bd%bf%e7%94%a8%e9%8e%96%e6%a9%9f%e5%88%b6-uRNiBzPvrH\">1. \u4f7f\u7528\u9396\u6a5f\u5236<\/h2>\n<p>\u9396\u662f\u4fdd\u8b77\u5171\u4eab\u8cc7\u6e90\u7684\u5e38\u7528\u65b9\u6cd5\u3002\u5728\u591a\u7dda\u7a0b\u74b0\u5883\u4e2d\uff0c\u4f7f\u7528\u9396\u53ef\u4ee5\u78ba\u4fdd\u540c\u4e00\u6642\u9593\u53ea\u6709\u4e00\u500b\u7dda\u7a0b\u53ef\u4ee5\u8a2a\u554f\u6578\u64da\u5eab\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u898b\u7684\u9396\u6a5f\u5236\uff1a<\/p>\n<ul>\n<li><strong>\u4e92\u65a5\u9396\uff08Mutex\uff09<\/strong>: \u4e92\u65a5\u9396\u662f\u4e00\u7a2e\u57fa\u672c\u7684\u9396\u6a5f\u5236\uff0c\u78ba\u4fdd\u540c\u4e00\u6642\u9593\u53ea\u6709\u4e00\u500b\u7dda\u7a0b\u53ef\u4ee5\u8a2a\u554f\u7279\u5b9a\u7684\u8cc7\u6e90\u3002<\/li>\n<li><strong>\u8b80\u5beb\u9396\uff08Read-Write Lock\uff09<\/strong>: \u8b80\u5beb\u9396\u5141\u8a31\u591a\u500b\u7dda\u7a0b\u540c\u6642\u8b80\u53d6\u8cc7\u6e90\uff0c\u4f46\u5728\u5beb\u5165\u6642\u6703\u9396\u5b9a\u8cc7\u6e90\uff0c\u78ba\u4fdd\u6578\u64da\u7684\u4e00\u81f4\u6027\u3002<\/li>\n<\/ul>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u4f7f\u7528\u4e92\u65a5\u9396\u7684\u7c21\u55ae\u793a\u4f8b\uff1a<\/p>\n<pre><code>\n#include &lt;windows.h&gt;\n\nHANDLE hMutex;\n\nvoid AccessDatabase() {\n    WaitForSingleObject(hMutex, INFINITE); \/\/ \u7372\u53d6\u9396\n    \/\/ \u8a2a\u554f\u6578\u64da\u5eab\u7684\u4ee3\u78bc\n    ReleaseMutex(hMutex); \/\/ \u91cb\u653e\u9396\n}\n<\/code><\/pre>\n<h2 id=\"2-%e4%bd%bf%e7%94%a8%e4%ba%8b%e5%8b%99-uRNiBzPvrH\">2. \u4f7f\u7528\u4e8b\u52d9<\/h2>\n<p>\u4e8b\u52d9\u662f\u4e00\u7d44\u64cd\u4f5c\u7684\u96c6\u5408\uff0c\u9019\u4e9b\u64cd\u4f5c\u8981\u9ebc\u5168\u90e8\u6210\u529f\uff0c\u8981\u9ebc\u5168\u90e8\u5931\u6557\u3002\u4f7f\u7528\u4e8b\u52d9\u53ef\u4ee5\u78ba\u4fdd\u6578\u64da\u7684\u4e00\u81f4\u6027\uff0c\u7279\u5225\u662f\u5728\u591a\u7dda\u7a0b\u74b0\u5883\u4e2d\u3002\u7576\u4e00\u500b\u7dda\u7a0b\u5728\u57f7\u884c\u4e8b\u52d9\u6642\uff0c\u5176\u4ed6\u7dda\u7a0b\u7121\u6cd5\u8a2a\u554f\u8a72\u6578\u64da\uff0c\u5f9e\u800c\u907f\u514d\u4e86\u6578\u64da\u4e0d\u4e00\u81f4\u7684\u554f\u984c\u3002<\/p>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u4f7f\u7528\u4e8b\u52d9\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>\nvoid ExecuteTransaction() {\n    \/\/ \u958b\u59cb\u4e8b\u52d9\n    BeginTransaction();\n    \/\/ \u57f7\u884c\u6578\u64da\u5eab\u64cd\u4f5c\n    if (\/* \u64cd\u4f5c\u6210\u529f *\/) {\n        CommitTransaction(); \/\/ \u63d0\u4ea4\u4e8b\u52d9\n    } else {\n        RollbackTransaction(); \/\/ \u56de\u6efe\u4e8b\u52d9\n    }\n}\n<\/code><\/pre>\n<h2 id=\"3-%e4%bd%bf%e7%94%a8%e9%80%a3%e6%8e%a5%e6%b1%a0-uRNiBzPvrH\">3. \u4f7f\u7528\u9023\u63a5\u6c60<\/h2>\n<p>\u9023\u63a5\u6c60\u662f\u4e00\u7a2e\u7ba1\u7406\u6578\u64da\u5eab\u9023\u63a5\u7684\u6280\u8853\uff0c\u53ef\u4ee5\u63d0\u9ad8\u6027\u80fd\u4e26\u6e1b\u5c11\u8cc7\u6e90\u6d88\u8017\u3002\u5728\u591a\u7dda\u7a0b\u74b0\u5883\u4e2d\uff0c\u4f7f\u7528\u9023\u63a5\u6c60\u53ef\u4ee5\u907f\u514d\u6bcf\u500b\u7dda\u7a0b\u90fd\u5275\u5efa\u548c\u92b7\u6bc0\u6578\u64da\u5eab\u9023\u63a5\u7684\u958b\u92b7\u3002\u9023\u63a5\u6c60\u6703\u7dad\u8b77\u4e00\u7d44\u53ef\u91cd\u7528\u7684\u9023\u63a5\uff0c\u7576\u7dda\u7a0b\u9700\u8981\u8a2a\u554f\u6578\u64da\u5eab\u6642\uff0c\u53ef\u4ee5\u5f9e\u6c60\u4e2d\u7372\u53d6\u9023\u63a5\uff0c\u4f7f\u7528\u5b8c\u7562\u5f8c\u518d\u6b78\u9084\u3002<\/p>\n<h2 id=\"4-%e9%81%bf%e5%85%8d%e5%85%a8%e5%b1%80%e8%ae%8a%e9%87%8f-uRNiBzPvrH\">4. \u907f\u514d\u5168\u5c40\u8b8a\u91cf<\/h2>\n<p>\u5728\u591a\u7dda\u7a0b\u74b0\u5883\u4e2d\uff0c\u5168\u5c40\u8b8a\u91cf\u53ef\u80fd\u6703\u5c0e\u81f4\u6578\u64da\u7af6\u722d\u548c\u4e0d\u4e00\u81f4\u7684\u554f\u984c\u3002\u5efa\u8b70\u4f7f\u7528\u5c40\u90e8\u8b8a\u91cf\u6216\u5c07\u6578\u64da\u5c01\u88dd\u5728\u985e\u4e2d\uff0c\u4ee5\u6e1b\u5c11\u4e0d\u540c\u7dda\u7a0b\u4e4b\u9593\u7684\u5e72\u64fe\u3002<\/p>\n<h2 id=\"5-%e4%bd%bf%e7%94%a8%e7%b7%9a%e7%a8%8b%e5%ae%89%e5%85%a8%e7%9a%84%e6%95%b8%e6%93%9a%e7%b5%90%e6%a7%8b-uRNiBzPvrH\">5. \u4f7f\u7528\u7dda\u7a0b\u5b89\u5168\u7684\u6578\u64da\u7d50\u69cb<\/h2>\n<p>\u9078\u64c7\u7dda\u7a0b\u5b89\u5168\u7684\u6578\u64da\u7d50\u69cb\u53ef\u4ee5\u6e1b\u5c11\u591a\u7dda\u7a0b\u8a2a\u554f\u6578\u64da\u5eab\u6642\u7684\u554f\u984c\u3002\u4f8b\u5982\uff0c\u4f7f\u7528 C++ \u6a19\u6e96\u5eab\u4e2d\u7684 <code>std::mutex<\/code> \u548c <code>std::lock_guard<\/code> \u53ef\u4ee5\u7c21\u5316\u9396\u7684\u7ba1\u7406\uff0c\u6e1b\u5c11\u932f\u8aa4\u7684\u53ef\u80fd\u6027\u3002<\/p>\n<pre><code>\n#include &lt;mutex&gt;\n\nstd::mutex dbMutex;\n\nvoid SafeAccessDatabase() {\n    std::lock_guard&lt;std::mutex&gt; lock(dbMutex); \/\/ \u81ea\u52d5\u7ba1\u7406\u9396\n    \/\/ \u8a2a\u554f\u6578\u64da\u5eab\u7684\u4ee3\u78bc\n}\n<\/code><\/pre>\n<h2 id=\"%e7%b8%bd%e7%b5%90-uRNiBzPvrH\">\u7e3d\u7d50<\/h2>\n<p>\u5728 VC \u7a0b\u5e8f\u4e2d\u5b89\u5168\u5730\u8a2a\u554f\u6578\u64da\u5eab\u9700\u8981\u8003\u616e\u591a\u7dda\u7a0b\u7684\u7279\u6027\u3002\u901a\u904e\u4f7f\u7528\u9396\u6a5f\u5236\u3001\u4e8b\u52d9\u3001\u9023\u63a5\u6c60\u3001\u907f\u514d\u5168\u5c40\u8b8a\u91cf\u4ee5\u53ca\u9078\u64c7\u7dda\u7a0b\u5b89\u5168\u7684\u6578\u64da\u7d50\u69cb\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u7ba1\u7406\u6578\u64da\u5eab\u8a2a\u554f\uff0c\u78ba\u4fdd\u6578\u64da\u7684\u4e00\u81f4\u6027\u548c\u5b8c\u6574\u6027\u3002\u9019\u4e9b\u6280\u5de7\u4e0d\u50c5\u9069\u7528\u65bc VC \u7a0b\u5e8f\uff0c\u4e5f\u53ef\u4ee5\u61c9\u7528\u65bc\u5176\u4ed6\u7de8\u7a0b\u8a9e\u8a00\u548c\u74b0\u5883\u4e2d\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u60a8\u7684\u9700\u6c42\u3002\u7121\u8ad6\u662f <a href=\"https:\/\/server.hk\">\u96f2\u4f3a\u670d\u5668<\/a> \u9084\u662f <a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a>\uff0c\u6211\u5011\u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u7a69\u5b9a\u7684\u6027\u80fd\u548c\u5b89\u5168\u7684\u74b0\u5883\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22 VC \u7a0b\u5e8f\u8a2a\u554f\u6578\u64da\u5eab\u7684\u591a\u7dda\u7a0b\u5b89\u5168\u6280\u5de7\uff0c\u78ba\u4fdd\u6578\u64da\u4e00\u81f4\u6027\u8207\u61c9\u7528\u6027\u80fd\uff0c\u63d0\u5347\u958b\u767c\u6548\u7387\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-145347","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/145347","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"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=145347"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/145347\/revisions"}],"predecessor-version":[{"id":145348,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/145347\/revisions\/145348"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=145347"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=145347"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=145347"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}