|
| 1 | +#include<cygwin/version.h> |
| 2 | +#ifCYGWIN_VERSION_DLL_MAJOR<1001 |
| 3 | + |
| 4 | +/* dllinit.c -- Portable DLL initialization. |
| 5 | + Copyright (C) 1998 Free Software Foundation, Inc. |
| 6 | + Contributed by Mumit Khan (khan@xraylith.wisc.edu). |
| 7 | +
|
| 8 | + I've used DllMain as the DLL "main" since that's the most common |
| 9 | + usage. MSVC and Mingw32 both default to DllMain as the standard |
| 10 | + callback from the linker entry point. Cygwin32 b19+ uses essentially |
| 11 | + the same, albeit slightly differently implemented, scheme. Please |
| 12 | + see DECLARE_CYGWIN_DLL macro in <cygwin32/cygwin_dll.h> for more |
| 13 | + info on how Cygwin32 uses the callback function. |
| 14 | +
|
| 15 | + The real entry point is typically always defined by the runtime |
| 16 | + library, and usually never overridden by (casual) user. What you can |
| 17 | + override however is the callback routine that the entry point calls, |
| 18 | + and this file provides such a callback function, DllMain. |
| 19 | +
|
| 20 | + Mingw32: The default entry point for mingw32 is DllMainCRTStartup |
| 21 | + which is defined in libmingw32.a This in turn calls DllMain which is |
| 22 | + defined here. If not defined, there is a stub in libmingw32.a which |
| 23 | + does nothing. |
| 24 | +
|
| 25 | + Cygwin32: The default entry point for cygwin32 b19 or newer is |
| 26 | + __cygwin32_dll_entry which is defined in libcygwin.a. This in turn |
| 27 | + calls the routine you supply to the DECLARE_CYGWIN_DLL (see below) |
| 28 | + and, for this example, I've chose DllMain to be consistent with all |
| 29 | + the other platforms. |
| 30 | +
|
| 31 | + MSVC: MSVC runtime calls DllMain, just like Mingw32. |
| 32 | +
|
| 33 | + Summary: If you need to do anything special in DllMain, just add it |
| 34 | + here. Otherwise, the default setup should be just fine for 99%+ of |
| 35 | + the time. I strongly suggest that you *not* change the entry point, |
| 36 | + but rather change DllMain as appropriate. |
| 37 | +
|
| 38 | + */ |
| 39 | + |
| 40 | + |
| 41 | +#defineWIN32_LEAN_AND_MEAN |
| 42 | +#include<windows.h> |
| 43 | +#undef WIN32_LEAN_AND_MEAN |
| 44 | +#include<stdio.h> |
| 45 | + |
| 46 | +BOOLAPIENTRYDllMain(HINSTANCEhInst,DWORDreason, |
| 47 | +LPVOIDreserved/* Not used. */ ); |
| 48 | + |
| 49 | +#ifdef__CYGWIN__ |
| 50 | + |
| 51 | +#include<cygwin/cygwin_dll.h> |
| 52 | +DECLARE_CYGWIN_DLL(DllMain); |
| 53 | +/* save hInstance from DllMain */ |
| 54 | +HINSTANCE__hDllInstance_base; |
| 55 | +#endif/* __CYGWIN__ */ |
| 56 | + |
| 57 | +struct_reent*_impure_ptr; |
| 58 | + |
| 59 | +externstruct_reent*__imp_reent_data; |
| 60 | + |
| 61 | +/* |
| 62 | + *---------------------------------------------------------------------- |
| 63 | + * |
| 64 | + * DllMain |
| 65 | + * |
| 66 | + *This routine is called by the Mingw32, Cygwin32 or VC++ C run |
| 67 | + *time library init code, or the Borland DllEntryPoint routine. It |
| 68 | + *is responsible for initializing various dynamically loaded |
| 69 | + *libraries. |
| 70 | + * |
| 71 | + * Results: |
| 72 | + *TRUE on sucess, FALSE on failure. |
| 73 | + * |
| 74 | + * Side effects: |
| 75 | + * |
| 76 | + *---------------------------------------------------------------------- |
| 77 | + */ |
| 78 | +BOOLAPIENTRY |
| 79 | +DllMain( |
| 80 | +HINSTANCEhInst/* Library instance handle. */ , |
| 81 | +DWORDreason/* Reason this function is being called. */ , |
| 82 | +LPVOIDreserved/* Not used. */ ) |
| 83 | +{ |
| 84 | + |
| 85 | +#ifdef__CYGWIN__ |
| 86 | +__hDllInstance_base=hInst; |
| 87 | +#endif/* __CYGWIN__ */ |
| 88 | + |
| 89 | +_impure_ptr=__imp_reent_data; |
| 90 | + |
| 91 | +switch (reason) |
| 92 | +{ |
| 93 | +caseDLL_PROCESS_ATTACH: |
| 94 | +break; |
| 95 | + |
| 96 | +caseDLL_PROCESS_DETACH: |
| 97 | +break; |
| 98 | + |
| 99 | +caseDLL_THREAD_ATTACH: |
| 100 | +break; |
| 101 | + |
| 102 | +caseDLL_THREAD_DETACH: |
| 103 | +break; |
| 104 | +} |
| 105 | +return TRUE; |
| 106 | +} |
| 107 | + |
| 108 | +#endif/* CYGWIN_VERSION_DLL_MAJOR < 1001 */ |