{"id":18,"date":"2015-05-01T14:45:37","date_gmt":"2015-05-01T06:45:37","guid":{"rendered":"http:\/\/zfframework.com\/blog\/?p=18"},"modified":"2019-08-26T15:21:44","modified_gmt":"2019-08-26T07:21:44","slug":"c-%e6%85%8e%e7%94%a8%e5%b1%80%e9%83%a8%e9%9d%99%e6%80%81%e5%8f%98%e9%87%8f","status":"publish","type":"post","link":"http:\/\/zsaber.com\/blog\/?p=18","title":{"rendered":"[C++] \u5934\u6587\u4ef6\u4e2d\u614e\u7528\u5c40\u90e8\u9759\u6001\u53d8\u91cf"},"content":{"rendered":"

\u5148\u770b\u770b\u4f8b\u5b50\u5427:<\/p>\n

\/\/ SomeClass.h\nclass SomeClass {\npublic:\n    static string &func1(void) {\n        static string s1;\n        return s1;\n    }\n    static string &func2(void);\n};\n\/\/ SomeClass.cpp\nstring &SomeClass::func2(void) {\n    static string s2;\n    return s2;\n}<\/code><\/pre>\n
\u770b\u51fa\u533a\u522b\u4e86\u5417? \u6b63\u5e38\u60c5\u51b5\u4e0b\u662f\u4e0d\u4f1a\u6709\u4ec0\u4e48\u95ee\u9898\u7684, \u4f46\u5982\u679c:<\/p>\n
    \n
  1. SomeClass \u5728 A.so \u4e2d<\/li>\n
  2. \u53c8\u6709\u4e2a B.so \u52a0\u8f7d\u4e86 A.so<\/li>\n
  3. A.so \u548c B.so \u90fd\u901a\u8fc7 func1 \u6765\u66f4\u6539 s1 \u7684\u503c<\/li>\n<\/ol>\n
    \u5c31\u4f1a\u9020\u6210:<\/p>\n
    s1 \u88ab\u521b\u5efa\u4e24\u6b21, \u5e76\u4e14\u5728 A.so \u548c B.so \u4e2d\u6709\u5355\u72ec\u7684\u503c, \u4e92\u76f8\u72ec\u7acb<\/p>\n
    \u800c\u76f8\u5bf9\u7684, func2 \u5e76\u4e0d\u4f1a\u51fa\u73b0\u8be5\u95ee\u9898<\/p>\n
    \u76ee\u6d4b\u539f\u56e0\u662f\u5199\u5728\u5934\u6587\u4ef6\u4e2d\u7684\u9759\u6001\u65b9\u6cd5\u88ab\u6bcf\u4e2a\u7f16\u8bd1\u6a21\u5757\u5355\u72ec\u7f16\u8bd1\u8fdb\u6a21\u5757\u5185\u4e86, \u662f\u5426\u7f16\u8bd1\u5668\u76f8\u5173\u672a\u77e5<\/p>\n
    \u76ee\u524d\u91c7\u7528\u4ee5\u4e0b\u65b9\u6cd5\u7ed5\u9053\u89e3\u51b3:<\/p>\n
    \/\/ SomeClass.h\nextern string &GetStringRef(const char *token);\nclass SomeClass {\npublic:\n    static string &func1(void) {\n        static string &s1 = GetStringRef("SomeClass");\n        return s1;\n    }\n    static string &func2(void);\n};\n\/\/ SomeClass.cpp\nstring &GetStringRef(const char *token) {\n    static map m;\n    return m[token];\n}\nstring &SomeClass::func2(void) {\n    static string s2;\n    return s2;\n}<\/code><\/pre>\n
    JJYY:<\/p>\n