{"id":767,"date":"2024-11-07T13:49:50","date_gmt":"2024-11-07T05:49:50","guid":{"rendered":"https:\/\/fwq.ai\/blog\/767\/"},"modified":"2024-11-07T13:49:50","modified_gmt":"2024-11-07T05:49:50","slug":"c%e8%af%ad%e8%a8%80%e9%9d%a2%e5%90%91%e5%af%b9%e8%b1%a1%e7%bc%96%e7%a8%8b%ef%bc%9a%e8%ae%be%e8%ae%a1%e6%a8%a1%e5%bc%8f%e8%a7%a3%e6%9e%90%e4%b8%8e%e5%ae%9e%e6%88%98%e9%97%ae%e7%ad%94","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/767\/","title":{"rendered":"C\u8bed\u8a00\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\uff1a\u8bbe\u8ba1\u6a21\u5f0f\u89e3\u6790\u4e0e\u5b9e\u6218\u95ee\u7b54"},"content":{"rendered":"

\u8bbe\u8ba1\u6a21\u5f0f\u662f\u89e3\u51b3\u8f6f\u4ef6\u8bbe\u8ba1\u5e38\u89c1\u95ee\u9898\u7684\u901a\u7528\u89e3\u51b3\u65b9\u6848\uff0c\u63d0\u4f9b\u53ef\u91cd\u7528\u7684\u6846\u67b6\u3002\u5176\u4e2d\u5355\u4f8b\u6a21\u5f0f\u786e\u4fdd\u4e00\u4e2a\u7c7b\u53ea\u6709\u4e00\u4e2a\u5b9e\u4f8b\uff0c\u7528\u4e8e\u521b\u5efa\u5168\u5c40\u5bf9\u8c61\u6216\u7ba1\u7406\u8d44\u6e90\u3002\u8bbe\u8ba1\u6a21\u5f0f\u5206\u4e3a\u521b\u5efa\u578b\u3001\u7ed3\u6784\u578b\u548c\u884c\u4e3a\u578b\u6a21\u5f0f\uff0c\u9009\u62e9\u5408\u9002\u7684\u6a21\u5f0f\u53d6\u51b3\u4e8e\u95ee\u9898\u7684\u5177\u4f53\u9700\u6c42\u3002\u9002\u5f53\u5730\u4f7f\u7528\u8bbe\u8ba1\u6a21\u5f0f\u53ef\u4ee5\u7f16\u5199\u66f4\u5065\u58ee\u548c\u53ef\u6269\u5c55\u7684\u4ee3\u7801\uff0c\u4f46\u8fc7\u5ea6\u4f7f\u7528\u53ef\u80fd\u5bfc\u81f4\u4ee3\u7801\u590d\u6742\u5316\u3002<\/p>\n

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C \u8bed\u8a00\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\uff1a\u8bbe\u8ba1\u6a21\u5f0f\u89e3\u6790\u4e0e\u5b9e\u6218\u95ee\u7b54<\/strong><\/p>\n

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#include <stdio.h>\n#include <stdlib.h>\n\ntypedef struct Singleton {\n    \/\/ \u53d8\u91cf\u548c\u65b9\u6cd5\n} Singleton;\n\nSingleton *singleton = NULL;\n\nSingleton *get_singleton() {\n    if (singleton == NULL) {\n        singleton = malloc(sizeof(Singleton));\n        \/\/ \u521d\u59cb\u5316 singleton\n    }\n    return singleton;\n}\n\nint main() {\n    Singleton *instance1 = get_singleton();\n    Singleton *instance2 = get_singleton();\n\n    printf(\"%p\n\", instance1);  \/\/ \u8f93\u51fa\u5730\u5740\n    printf(\"%p\n\", instance2);  \/\/ \u8f93\u51fa\u76f8\u540c\u5730\u5740\n    return 0;\n}<\/stdlib.h><\/stdio.h><\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u89e3\u6790\uff1a\u8bbe\u8ba1\u6a21\u5f0f\u7684\u79cd\u7c7b<\/strong><\/p>\n
\u8bbe\u8ba1\u6a21\u5f0f\u6709\u5f88\u591a\u79cd\uff0c\u5176\u4e2d\u4e00\u4e9b\u5e38\u89c1\u7684\u6a21\u5f0f\u5305\u62ec\uff1a<\/p>\n
    \n
  •  \u521b\u5efa\u578b\u6a21\u5f0f\uff1a<\/strong>\u7528\u4e8e\u521b\u5efa\u5bf9\u8c61\uff0c\u4f8b\u5982\u5355\u4f8b\u6a21\u5f0f\u548c\u5de5\u5382\u65b9\u6cd5\u6a21\u5f0f\u3002<\/li>\n
  •  \u7ed3\u6784\u578b\u6a21\u5f0f\uff1a<\/strong>\u7528\u4e8e\u7ec4\u7ec7\u548c\u7ba1\u7406\u5bf9\u8c61\uff0c\u4f8b\u5982\u9002\u914d\u5668\u6a21\u5f0f\u548c\u4ee3\u7406\u6a21\u5f0f\u3002<\/li>\n
  •  \u884c\u4e3a\u578b\u6a21\u5f0f\uff1a<\/strong>\u7528\u4e8e\u5b9a\u4e49\u5bf9\u8c61\u4e4b\u95f4\u7684\u4ea4\u4e92\uff0c\u4f8b\u5982\u89c2\u5bdf\u8005\u6a21\u5f0f\u548c\u7b56\u7565\u6a21\u5f0f\u3002<\/li>\n<\/ul>\n
    \u5e38\u89c1\u95ee\u9898<\/strong><\/p>\n
      \n
    •  \u4ec0\u4e48\u65f6\u5019\u5e94\u8be5\u4f7f\u7528\u8bbe\u8ba1\u6a21\u5f0f\uff1f<\/strong>\u5f53\u60a8\u9047\u5230\u5e38\u89c1\u8f6f\u4ef6\u8bbe\u8ba1\u95ee\u9898\u65f6\uff0c\u4e86\u89e3\u5e76\u4f7f\u7528\u8bbe\u8ba1\u6a21\u5f0f\u53ef\u4ee5\u5e2e\u52a9\u60a8\u7f16\u5199\u66f4\u5065\u58ee\u548c\u53ef\u6269\u5c55\u7684\u4ee3\u7801\u3002<\/li>\n
    •  \u5982\u4f55\u9009\u62e9\u6b63\u786e\u7684\u6a21\u5f0f\uff1f<\/strong>\u9009\u62e9\u6b63\u786e\u7684\u6a21\u5f0f\u53d6\u51b3\u4e8e\u60a8\u8981\u89e3\u51b3\u7684\u95ee\u9898\u7684\u7279\u5b9a\u9700\u6c42\u3002\u8003\u8651\u4ee3\u7801\u7684\u53ef\u91cd\u7528\u6027\u3001\u53ef\u7ef4\u62a4\u6027\u548c\u6548\u7387\u7b49\u56e0\u7d20\u3002<\/li>\n
    •  \u8fc7\u5ea6\u4f7f\u7528\u8bbe\u8ba1\u6a21\u5f0f\u662f\u5426\u4f1a\u5bfc\u81f4\u95ee\u9898\uff1f<\/strong>\u8fc7\u5ea6\u4f7f\u7528\u8bbe\u8ba1\u6a21\u5f0f\u53ef\u80fd\u4f7f\u4ee3\u7801\u590d\u6742\u548c\u96be\u4ee5\u7406\u89e3\u3002\u660e\u667a\u5730\u9009\u62e9\u5e76\u4f7f\u7528\u9002\u5f53\u7684\u6a21\u5f0f\u975e\u5e38\u91cd\u8981\u3002<\/li>\n<\/ul>\n
      \u4ee5\u4e0a\u5c31\u662fC\u8bed\u8a00\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\uff1a\u8bbe\u8ba1\u6a21\u5f0f\u89e3\u6790\u4e0e\u5b9e\u6218\u95ee\u7b54\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
      \u8bbe\u8ba1\u6a21\u5f0f\u662f\u89e3\u51b3\u8f6f\u4ef6\u8bbe\u8ba1\u5e38\u89c1\u95ee\u9898\u7684\u901a\u7528\u89e3\u51b3\u65b9\u6848\uff0c\u63d0\u4f9b\u53ef\u91cd\u7528\u7684\u6846\u67b6\u3002\u5176\u4e2d\u5355\u4f8b\u6a21\u5f0f\u786e\u4fdd\u4e00\u4e2a\u7c7b\u53ea\u6709\u4e00\u4e2a\u5b9e\u4f8b\uff0c\u7528\u4e8e\u521b\u5efa\u5168\u5c40\u5bf9\u8c61\u6216\u7ba1\u7406\u8d44\u6e90\u3002\u8bbe\u8ba1\u6a21\u5f0f\u5206\u4e3a\u521b\u5efa\u578b\u3001\u7ed3\u6784\u578b\u548c\u884c\u4e3a\u578b\u6a21\u5f0f\uff0c\u9009\u62e9\u5408\u9002\u7684\u6a21\u5f0f\u53d6\u51b3\u4e8e\u95ee\u9898\u7684\u5177\u4f53\u9700\u6c42\u3002\u9002\u5f53\u5730\u4f7f\u7528\u8bbe\u8ba1\u6a21\u5f0f\u53ef\u4ee5\u7f16\u5199\u66f4\u5065\u58ee\u548c\u53ef\u6269\u5c55\u7684\u4ee3\u7801\uff0c\u4f46\u8fc7\u5ea6\u4f7f\u7528\u53ef\u80fd\u5bfc\u81f4\u4ee3\u7801\u590d\u6742\u5316\u3002 C \u8bed\u8a00\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\uff1a\u8bbe\u8ba1\u6a21\u5f0f\u89e3\u6790\u4e0e\u5b9e\u6218\u95ee\u7b54 \u5f15\u8a00 \u8bbe\u8ba1\u6a21\u5f0f\u662f\u4e00\u79cd\u901a\u7528\u7684\u89e3\u51b3\u65b9\u6848\uff0c\u7528\u4e8e\u89e3\u51b3\u8f6f\u4ef6\u8bbe\u8ba1\u4e2d\u5e38\u89c1\u7684\u91cd\u590d\u95ee\u9898\u3002\u5b83\u4eec\u901a\u8fc7\u63d0\u4f9b\u53ef\u91cd\u7528\u7684\u6846\u67b6\uff0c\u5e2e\u52a9\u5f00\u53d1\u8005\u7f16\u5199\u66f4\u7075\u6d3b\u3001\u53ef\u7ef4\u62a4\u548c\u53ef\u6269\u5c55\u7684\u4ee3\u7801\u3002 \u7acb\u5373\u5b66\u4e60\u201cC\u8bed\u8a00\u514d\u8d39\u5b66\u4e60\u7b14\u8bb0\uff08\u6df1\u5165\uff09\u201d\uff1b \u5b9e\u6218\u6848\u4f8b\uff1a\u5355\u4f8b\u6a21\u5f0f \u5355\u4f8b\u6a21\u5f0f\u786e\u4fdd\u4e00\u4e2a\u7c7b\u53ea\u6709\u4e00\u4e2a\u5b9e\u4f8b\uff0c\u8fd9\u5728\u521b\u5efa\u5168\u5c40\u5bf9\u8c61\u6216\u7ba1\u7406\u8d44\u6e90\u65f6\u975e\u5e38\u6709\u7528\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a C \u8bed\u8a00\u5355\u4f8b\u6a21\u5f0f\u7684\u5b9e\u73b0\uff1a #include <stdio.h> #include <stdlib.h> typedef struct Singleton { \/\/ \u53d8\u91cf\u548c\u65b9\u6cd5 } Singleton; Singleton *singleton = NULL; Singleton *get_singleton() { if (singleton == NULL) { singleton = malloc(sizeof(Singleton)); \/\/ \u521d\u59cb\u5316 singleton } return singleton; } int main() { Singleton *instance1 = get_singleton(); Singleton *instance2 = get_singleton(); […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-767","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/767","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=767"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/767\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=767"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=767"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=767"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}