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