Source code of Windows XP (NT5)
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//
// DECLSPEC.H: Define the DLL_BASED and DLL_CLASS manifests for
// DLL export/import decoration
//
// BUGBUG: Temporarily DISABLED until __declspec works better
//
// If a fixed header files is needed, define _DECLSPEC_WORKS_ and this
// header file will work correctly.
//
#if !defined(_DECLSPEC_WORKS_)
#if !defined(_DECLSPEC_H_)
#define _DECLSPEC_H_
// Create benign definitions for __declspec macros.
#define DLL_TEMPLATE
#define DLL_CLASS class
#define DLL_BASED
#endif
#endif
#if !defined(_DECLSPEC_H_)
#define _DECLSPEC_H_
//
// DECLSPEC.H: Define the DLL_BASED and DLL_CLASS manifests for
// DLL export/import decoration
//
// This file is based upon the following macro definitions:
//
// _CFRONT_PASS_ defined in MAKEFILE.DEF for CFRONT preprocessing;
//
// _cplusplus defined for all C++ compilation;
//
// NETUI_DLL defined in $(UI)\COMMON\SRC\DLLRULES.MK, which is
// included by all components which live in NETUI DLLs.
//
// DLL_BASED_DEFEAT optional manifest that suppresses __declspec;
//
// This file generates two definitions:
//
// DLL_BASED which indicates that the external function, data item
// or class lives in a NETUI DLL; expands to nothing,
// "_declspec(dllimport)", or "_declspec(dllexport)"
// depending upon the manifest above.
//
// DLL_CLASS which expands to "class", "class _declspec(dllimport)",
// or "class _declspec(dllexport)" depending on the
// manifests above.
//
// DLL_TEMPLATE expands to nothing outside of the DLLs; expands to
// DLL_BASED inside the DLLs. In other words, the standard
// template is local to the defining link scope. To
// declare a template as "dllimport", another set of
// macros exists which allows direct specification of the
// desired decoration.
//
#if defined(_CFRONT_PASS_)
#define DLL_BASED_DEFEAT
#endif
// Define DLL_BASED for all compiles
#if defined(DLL_BASED_DEFEAT)
// If CFront, no decoration allowed
#define DLL_BASED
#else
#if defined(NETUI_DLL)
// If C8 and inside DLL, export stuff
#define DLL_BASED __declspec(dllexport)
#else
// If C8 and inside DLL, import stuff
#define DLL_BASED __declspec(dllimport)
#endif
#endif
// If C++, define the DLL_CLASS and DLL_TEMPLATE macros
#if defined(__cplusplus)
#if defined(DLL_BASED_DEFEAT)
// If CFRONT, no decoration allowed
#define DLL_CLASS class
#define DLL_TEMPLATE
#else
#define DLL_CLASS class DLL_BASED
#if defined(NETUI_DLL)
// Templates expanded in the DLL are exported
#define DLL_TEMPLATE DLL_BASED
#else
#define DLL_TEMPLATE
#endif
#endif
#endif
#endif // !_DECLSPEC_H_