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C/C++ Source or Header  |  2004-01-30  |  2.8 KB  |  95 lines
  1. /* cygwin_dll.h
  2.  
  3.    Copyright 1998, 1999, 2000, 2001 Red Hat, Inc.
  4.  
  5. This file is part of Cygwin.
  6.  
  7. This software is a copyrighted work licensed under the terms of the
  8. Cygwin license.  Please consult the file "CYGWIN_LICENSE" for
  9. details. */
  10.  
  11. #ifndef __CYGWIN_CYGWIN_DLL_H__
  12. #define __CYGWIN_CYGWIN_DLL_H__
  13.  
  14. #include <windows.h>
  15.  
  16. #ifdef __cplusplus
  17. #define CDECL_BEGIN extern "C" {
  18. #define CDECL_END }
  19. #else
  20. #define CDECL_BEGIN
  21. #define CDECL_END
  22. #endif
  23.  
  24. #define DECLARE_CYGWIN_DLL(Entry)                          \
  25.                                           \
  26. CDECL_BEGIN                                      \
  27.   int WINAPI Entry (HINSTANCE h, DWORD reason, void *ptr);                  \
  28.   typedef int (*mainfunc) (int, char **, char **);                  \
  29.   extern int cygwin_attach_dll (HMODULE, mainfunc);                  \
  30.   extern void cygwin_detach_dll (DWORD);                      \
  31. CDECL_END                                      \
  32.                                           \
  33. static HINSTANCE storedHandle;                              \
  34. static DWORD storedReason;                              \
  35. static void* storedPtr;                                  \
  36.                                           \
  37. static int __dllMain (int a, char **b, char **c)                  \
  38. {                                          \
  39.   return Entry (storedHandle, storedReason, storedPtr);                      \
  40. }                                          \
  41.                                           \
  42. static DWORD dll_index;                                  \
  43.                                           \
  44. int WINAPI _cygwin_dll_entry (HINSTANCE h, DWORD reason, void *ptr)          \
  45. {                                          \
  46.   int ret;                                      \
  47.   ret = 1;                                      \
  48.                                           \
  49.   switch (reason)                                  \
  50.   {                                          \
  51.     case DLL_PROCESS_ATTACH:                              \
  52.     {                                          \
  53.       storedHandle = h;                                  \
  54.       storedReason = reason;                              \
  55.       storedPtr = ptr;                                  \
  56.       dll_index = cygwin_attach_dll (h, &__dllMain);                  \
  57.       if (dll_index == (DWORD) -1)                          \
  58.     ret = 0;                                  \
  59.     }                                          \
  60.     break;                                      \
  61.                                           \
  62.     case DLL_PROCESS_DETACH:                              \
  63.     {                                          \
  64.       ret = Entry (h, reason, ptr);                          \
  65.       if (ret)                                      \
  66.       {                                          \
  67.     cygwin_detach_dll (dll_index);                          \
  68.     dll_index = (DWORD) -1;                              \
  69.       }                                          \
  70.     }                                          \
  71.     break;                                      \
  72.                                           \
  73.     case DLL_THREAD_ATTACH:                              \
  74.     {                                          \
  75.       ret = Entry (h, reason, ptr);                          \
  76.     }                                          \
  77.     break;                                      \
  78.                                           \
  79.     case DLL_THREAD_DETACH:                              \
  80.     {                                          \
  81.       ret = Entry (h, reason, ptr);                          \
  82.     }                                          \
  83.     break;                                      \
  84.   }                                          \
  85.   return ret;                                      \
  86. }                                          \
  87.                                           \
  88. /* OBSOLETE: This is only provided for source level compatibility. */         \
  89. int WINAPI _cygwin_noncygwin_dll_entry (HINSTANCE h, DWORD reason, void *ptr) \
  90. {                                          \
  91.   return _cygwin_dll_entry (h, reason, ptr);                      \
  92. }                                          \
  93.  
  94. #endif /* __CYGWIN_CYGWIN_DLL_H__ */
  95.