#include #if CYGWIN_VERSION_DLL_MAJOR < 1001 /* dllinit.c -- Portable DLL initialization. Copyright (C) 1998 Free Software Foundation, Inc. Contributed by Mumit Khan (khan@xraylith.wisc.edu). I've used DllMain as the DLL "main" since that's the most common usage. MSVC and Mingw32 both default to DllMain as the standard callback from the linker entry point. Cygwin32 b19+ uses essentially the same, albeit slightly differently implemented, scheme. Please see DECLARE_CYGWIN_DLL macro in for more info on how Cygwin32 uses the callback function. The real entry point is typically always defined by the runtime library, and usually never overridden by (casual) user. What you can override however is the callback routine that the entry point calls, and this file provides such a callback function, DllMain. Mingw32: The default entry point for mingw32 is DllMainCRTStartup which is defined in libmingw32.a This in turn calls DllMain which is defined here. If not defined, there is a stub in libmingw32.a which does nothing. Cygwin32: The default entry point for cygwin32 b19 or newer is __cygwin32_dll_entry which is defined in libcygwin.a. This in turn calls the routine you supply to the DECLARE_CYGWIN_DLL (see below) and, for this example, I've chose DllMain to be consistent with all the other platforms. MSVC: MSVC runtime calls DllMain, just like Mingw32. Summary: If you need to do anything special in DllMain, just add it here. Otherwise, the default setup should be just fine for 99%+ of the time. I strongly suggest that you *not* change the entry point, but rather change DllMain as appropriate. */ #define WIN32_LEAN_AND_MEAN #include #undef WIN32_LEAN_AND_MEAN #include BOOL APIENTRY DllMain(HINSTANCE hInst, DWORD reason, LPVOID reserved /* Not used. */ ); #ifdef __CYGWIN__ #include DECLARE_CYGWIN_DLL(DllMain); /* save hInstance from DllMain */ HINSTANCE __hDllInstance_base; #endif /* __CYGWIN__ */ struct _reent *_impure_ptr; extern struct _reent *__imp_reent_data; /* *---------------------------------------------------------------------- * * DllMain * * This routine is called by the Mingw32, Cygwin32 or VC++ C run * time library init code, or the Borland DllEntryPoint routine. It * is responsible for initializing various dynamically loaded * libraries. * * Results: * TRUE on sucess, FALSE on failure. * * Side effects: * *---------------------------------------------------------------------- */ BOOL APIENTRY DllMain( HINSTANCE hInst /* Library instance handle. */ , DWORD reason /* Reason this function is being called. */ , LPVOID reserved /* Not used. */ ) { #ifdef __CYGWIN__ __hDllInstance_base = hInst; #endif /* __CYGWIN__ */ _impure_ptr = __imp_reent_data; switch (reason) { case DLL_PROCESS_ATTACH: break; case DLL_PROCESS_DETACH: break; case DLL_THREAD_ATTACH: break; case DLL_THREAD_DETACH: break; } return TRUE; } #endif /* CYGWIN_VERSION_DLL_MAJOR < 1001 */