用宏定義封裝LoadLibrary，方便的動態加載dll，loadlibrarydll

用宏定義封裝LoadLibrary，方便的動態加載dll，loadlibrarydll

同學們動態加載dll的時候是不是感覺挺麻煩的，每次都::LoadLibrary，::GetProcAddress，還要typedef一堆函數。最近閒來無聊，用宏封裝了一下，可以少寫不少代碼，用來也挺方便的。

不過最多支持5個參數，同學們可以自己加。等著下次用flexbison寫一個生成工具，我感覺還是不錯的。

  1 #pragma once
  2 /*! \brief 動態加載dll，並調用導出函數
  3 author:[email protected]
  4 */
  5 #define DLLLOADER_BEGIN( NAME)\
  6 class DLLLOADER_##NAME\
  7 {\
  8 public:\
  9     static BOOL Init( LPCWSTR sDllPath){\
 10     if ( RefHModule())\
 11         {\
 12         return TRUE;\
 13         }\
 14         RefHModule() = ::LoadLibrary( sDllPath);\
 15         if ( !RefHModule())\
 16         {\
 17         return FALSE;\
 18         }\
 19         return TRUE;\
 20     }\
 21     static void UnInit(){\
 22     if ( RefHModule())\
 23         {\
 24         FreeLibrary( RefHModule());\
 25         RefHModule() = NULL;\
 26         }\
 27     }\
 28     static HMODULE& RefHModule(){\
 29     static HMODULE M = NULL;\
 30     return M;\
 31     }
 32 #define DLLLOADER_ENTRY_0( FUNNAME, FUNDESC, FUNRET, FUNRETDEF)\
 33     typedef FUNRET (FUNDESC *_##FUNNAME)();\
 34     static _##FUNNAME Ref##FUNNAME(){\
 35     _##FUNNAME F = (_##FUNNAME)::GetProcAddress( RefHModule(), #FUNNAME);\
 36     return F;\
 37     }\
 38     static FUNRET FUNNAME(){\
 39     if ( Ref##FUNNAME())\
 40         {\
 41         return Ref##FUNNAME()();\
 42         }\
 43         return FUNRETDEF;\
 44     }
 45 #define DLLLOADER_ENTRY_VOID0( FUNNAME, FUNDESC)\
 46     typedef void (FUNDESC *_##FUNNAME)();\
 47     static _##FUNNAME Ref##FUNNAME(){\
 48     _##FUNNAME F = (_##FUNNAME)::GetProcAddress( RefHModule(), #FUNNAME);\
 49     return F;\
 50     }\
 51     static void FUNNAME(){\
 52     if ( Ref##FUNNAME())\
 53         {\
 54         Ref##FUNNAME()();\
 55         }\
 56     }
 57 #define DLLLOADER_ENTRY_1( FUNNAME, FUNDESC, FUNRET, FUNRETDEF, PARAMTYPE1)\
 58     typedef FUNRET (FUNDESC *_##FUNNAME)(PARAMTYPE1);\
 59     static _##FUNNAME Ref##FUNNAME(){\
 60     _##FUNNAME F = (_##FUNNAME)::GetProcAddress( RefHModule(), #FUNNAME);\
 61     return F;\
 62     }\
 63     static FUNRET FUNNAME( PARAMTYPE1 PARAM1){\
 64     if ( Ref##FUNNAME())\
 65         {\
 66         return Ref##FUNNAME()( PARAM1);\
 67         }\
 68         return FUNRETDEF;\
 69     }
 70 #define DLLLOADER_ENTRY_VOID1( FUNNAME, FUNDESC, PARAMTYPE1)\
 71     typedef void (FUNDESC *_##FUNNAME)(PARAMTYPE1);\
 72     static _##FUNNAME Ref##FUNNAME(){\
 73     _##FUNNAME F = (_##FUNNAME)::GetProcAddress( RefHModule(), #FUNNAME);\
 74     return F;\
 75     }\
 76     static void FUNNAME( PARAMTYPE1 PARAM1){\
 77     if ( Ref##FUNNAME())\
 78         {\
 79         Ref##FUNNAME()( PARAM1);\
 80         }\
 81     }
 82 #define DLLLOADER_ENTRY_2( FUNNAME, FUNDESC, FUNRET, FUNRETDEF, PARAMTYPE1, PARAMTYPE2)\
 83     typedef FUNRET (FUNDESC *_##FUNNAME)(PARAMTYPE1, PARAMTYPE2);\
 84     static _##FUNNAME Ref##FUNNAME(){\
 85     _##FUNNAME F = (_##FUNNAME)::GetProcAddress( RefHModule(), #FUNNAME);\
 86     return F;\
 87     }\
 88     static FUNRET FUNNAME( PARAMTYPE1 PARAM1, PARAMTYPE2 PARAM2){\
 89     if ( Ref##FUNNAME())\
 90         {\
 91         return Ref##FUNNAME()( PARAM1, PARAM2);\
 92         }\
 93         return FUNRETDEF;\
 94     }
 95 #define DLLLOADER_ENTRY_VOID2( FUNNAME, FUNDESC, PARAMTYPE1, PARAMTYPE2)\
 96     typedef void (FUNDESC *_##FUNNAME)(PARAMTYPE1, PARAMTYPE2);\
 97     static _##FUNNAME Ref##FUNNAME(){\
 98     _##FUNNAME F = (_##FUNNAME)::GetProcAddress( RefHModule(), #FUNNAME);\
 99     return F;\
100     }\
101     static void FUNNAME( PARAMTYPE1 PARAM1, PARAMTYPE2 PARAM2){\
102     if ( Ref##FUNNAME())\
103         {\
104         Ref##FUNNAME()( PARAM1, PARAM2);\
105         }\
106     }
107 #define DLLLOADER_ENTRY_3( FUNNAME, FUNDESC, FUNRET, FUNRETDEF, PARAMTYPE1, PARAMTYPE2, PARAMTYPE3)\
108     typedef FUNRET (FUNDESC *_##FUNNAME)(PARAMTYPE1, PARAMTYPE2, PARAMTYPE3);\
109     static _##FUNNAME Ref##FUNNAME(){\
110     _##FUNNAME F = (_##FUNNAME)::GetProcAddress( RefHModule(), #FUNNAME);\
111     return F;\
112     }\
113     static FUNRET FUNNAME( PARAMTYPE1 PARAM1, PARAMTYPE2 PARAM2, PARAMTYPE3 PARAM3){\
114     if ( Ref##FUNNAME())\
115         {\
116         return Ref##FUNNAME()( PARAM1, PARAM2, PARAM3);\
117         }\
118         return FUNRETDEF;\
119     }
120 #define DLLLOADER_ENTRY_VOID3( FUNNAME, FUNDESC, PARAMTYPE1, PARAMTYPE2, PARAMTYPE3)\
121     typedef void (FUNDESC *_##FUNNAME)(PARAMTYPE1, PARAMTYPE2, PARAMTYPE3);\
122     static _##FUNNAME Ref##FUNNAME(){\
123     _##FUNNAME F = (_##FUNNAME)::GetProcAddress( RefHModule(), #FUNNAME);\
124     return F;\
125     }\
126     static void FUNNAME( PARAMTYPE1 PARAM1, PARAMTYPE2 PARAM2, PARAMTYPE3 PARAM3){\
127     if ( Ref##FUNNAME())\
128         {\
129         Ref##FUNNAME()( PARAM1, PARAM2, PARAM3);\
130         }\
131     }
132 #define DLLLOADER_ENTRY_4( FUNNAME, FUNDESC, FUNRET, FUNRETDEF, PARAMTYPE1,\
133 PARAMTYPE2, PARAMTYPE3, PARAMTYPE4)\
134     typedef FUNRET (FUNDESC *_##FUNNAME)(PARAMTYPE1, PARAMTYPE2, PARAMTYPE3, PARAMTYPE4);\
135     static _##FUNNAME Ref##FUNNAME(){\
136     _##FUNNAME F = (_##FUNNAME)::GetProcAddress( RefHModule(), #FUNNAME);\
137     return F;\
138     }\
139     static FUNRET FUNNAME( PARAMTYPE1 PARAM1, PARAMTYPE2 PARAM2, PARAMTYPE3 PARAM3, PARAMTYPE4 PARAM4){\
140     if ( Ref##FUNNAME())\
141         {\
142         return Ref##FUNNAME()( PARAM1, PARAM2, PARAM3, PARAM4);\
143         }\
144         return FUNRETDEF;\
145     }
146 #define DLLLOADER_ENTRY_VOID4( FUNNAME, FUNDESC, PARAMTYPE1,\
147 PARAMTYPE2, PARAMTYPE3, PARAMTYPE4)\
148     typedef void (FUNDESC *_##FUNNAME)(PARAMTYPE1, PARAMTYPE2, PARAMTYPE3, PARAMTYPE4);\
149     static _##FUNNAME Ref##FUNNAME(){\
150     _##FUNNAME F = (_##FUNNAME)::GetProcAddress( RefHModule(), #FUNNAME);\
151     return F;\
152     }\
153     static void FUNNAME( PARAMTYPE1 PARAM1, PARAMTYPE2 PARAM2, PARAMTYPE3 PARAM3, PARAMTYPE4 PARAM4){\
154     if ( Ref##FUNNAME())\
155         {\
156         Ref##FUNNAME()( PARAM1, PARAM2, PARAM3, PARAM4);\
157         }\
158     }
159 #define DLLLOADER_ENTRY_5( FUNNAME, FUNDESC, FUNRET, FUNRETDEF, PARAMTYPE1,\
160     PARAMTYPE2, PARAMTYPE3, PARAMTYPE4, PARAMTYPE5)\
161     typedef FUNRET (FUNDESC *_##FUNNAME)(PARAMTYPE1, \
162     PARAMTYPE2, PARAMTYPE3, PARAMTYPE4, PARAMTYPE5);\
163     static _##FUNNAME Ref##FUNNAME(){\
164     _##FUNNAME F = (_##FUNNAME)::GetProcAddress( RefHModule(), #FUNNAME);\
165     return F;\
166     }\
167     static FUNRET FUNNAME( PARAMTYPE1 PARAM1, PARAMTYPE2 PARAM2, \
168     PARAMTYPE3 PARAM3, PARAMTYPE4 PARAM4, PARAMTYPE5 PARAM5){\
169     if ( Ref##FUNNAME())\
170         {\
171         return Ref##FUNNAME()( PARAM1, PARAM2, PARAM3, PARAM4, PARAM5);\
172         }\
173         return FUNRETDEF;\
174     }
175 #define DLLLOADER_ENTRY_VOID5( FUNNAME, FUNDESC, PARAMTYPE1,\
176     PARAMTYPE2, PARAMTYPE3, PARAMTYPE4, PARAMTYPE5)\
177     typedef void (FUNDESC *_##FUNNAME)(PARAMTYPE1, \
178     PARAMTYPE2, PARAMTYPE3, PARAMTYPE4, PARAMTYPE5);\
179     static _##FUNNAME Ref##FUNNAME(){\
180     _##FUNNAME F = (_##FUNNAME)::GetProcAddress( RefHModule(), #FUNNAME);\
181     return F;\
182     }\
183     static void FUNNAME( PARAMTYPE1 PARAM1, PARAMTYPE2 PARAM2, \
184     PARAMTYPE3 PARAM3, PARAMTYPE4 PARAM4, PARAMTYPE5 PARAM5){\
185     if ( Ref##FUNNAME())\
186         {\
187         Ref##FUNNAME()( PARAM1, PARAM2, PARAM3, PARAM4, PARAM5);\
188         }\
189     }
190 #define DLLLOADER_END()\
191 };
192 
193 /*
194 例子：
195 DLLLOADER_BEGIN( SAMPLE)
196 DLLLOADER_ENTRY_0( Function1, BOOL, FALSE, )
197 DLLLOADER_ENTRY_VOID0( Function2, )
198 DLLLOADER_ENTRY_1( Function3, BOOL, FALSE, , LPCWSTR)
199 DLLLOADER_END()
200 
201 DLLLOADER_BEGIN(KERNEL32)
202 DLLLOADER_ENTRY_1( LoadLibraryW, WINAPI, HMODULE, 0, LPCWSTR)
203 DLLLOADER_ENTRY_3( GetModuleFileNameW, WINAPI, DWORD, 0, HMODULE, LPWSTR, DWORD)
204 DLLLOADER_END()
205 
206 int _tmain(int argc, _TCHAR* argv[])
207 {
208     DLLLOADER_SAMPLE::Init( L"C:\\Users\\sosopop\\Documents\\Visual Studio 2005\\Projects\\testHandle\\debug\\testLoadDll.dll");
209     DLLLOADER_SAMPLE::Function1();
210     DLLLOADER_SAMPLE::Function2();
211     DLLLOADER_SAMPLE::Function3(L"Function3 Hello");
212     DLLLOADER_SAMPLE::Function4(L"Function4", L"Hello");
213     DLLLOADER_SAMPLE::UnInit();
214 
215     DLLLOADER_KERNEL32::Init( L"c:\\windows\\system32\\kernel32.dll");
216     HMODULE h =DLLLOADER_KERNEL32::LoadLibraryW( L"user32.dll");
217     WCHAR sFileName[MAX_PATH]={0};
218     DWORD nSize = DLLLOADER_KERNEL32::GetModuleFileNameW( NULL, sFileName, _countof(sFileName));
219 
220     return 0;
221 }
222 */