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#ifndef EXTERNALCODE_H_INCLUDED_
#define EXTERNALCODE_H_INCLUDED_
#include "globalincs/pstypes.h"
/* We must have windows.h anywhere SCP_ExternalCode is used under windows */
#ifdef _WIN32
#include <windows.h>
#endif
/* This class loads external libraries for FSO use.
* Different platforms have different ways of doing this, so use your ifdefs!
*/
class SCP_ExternalCode
{
public:
SCP_ExternalCode( )
#ifdef _WIN32
: m_dll( NULL )
#endif
{
}
virtual ~SCP_ExternalCode( )
{
#ifdef _WIN32
if ( m_dll )
::FreeLibrary( m_dll );
#endif
}
protected:
BOOL LoadExternal( const char* externlib )
{
if ( !externlib )
return FALSE;
#ifdef _WIN32
m_dll = ::LoadLibrary( externlib );
if ( m_dll )
return TRUE;
#endif
return FALSE;
}
void* LoadFunction( const char* functionname )
{
#ifdef _WIN32
if ( m_dll != NULL && functionname != NULL )
return ::GetProcAddress( m_dll, functionname );
#endif
return NULL;
}
private:
#ifdef _WIN32
HMODULE m_dll;
#endif
};
/* These are available if you're compiling an external DLL
* So far we have trackir, and speech is on the way
*/
#ifdef _WIN32
# define SCP_EXT_CALLCONV __cdecl
# ifdef SCPDLL_EXTERNAL_LIB
# define SCPDLL_EXTERNAL __declspec( dllexport )
# else
# define SCPDLL_EXTERNAL __declspec( dllimport )
# endif
/* Must be in a CPP file in your DLL code
* If you want to write your own, you shouldn't.
*/
# define SCPDLL_DLLMAIN( ) \
SCP_EXTERN_C BOOL APIENTRY DllMain( HANDLE, DWORD, LPVOID ) { return TRUE; }
#else
# define SCP_EXT_CALLCONV
# define SCPDLL_EXTERNAL
# define SCPDLL_DLLMAIN( )
#endif
#ifdef __cplusplus
# define SCP_EXTERN_C extern "C"
#else
# define SCP_EXTERN_C
#endif
/* Version information */
typedef struct _SCPDLL_Version
{
int major;
int minor;
int patch;
} SCPDLL_Version;
typedef int ( SCP_EXT_CALLCONV *SCPDLL_PFVERSION )( SCPDLL_Version* );
/* Must be in a CPP file in your DLL code */
#define SCPDLL_VERSION_FUNCTION( Major, Minor, Patch ) \
SCP_EXTERN_C int SCPDLL_EXTERNAL SCPDLL_GetVersion( SCPDLL_Version* v ) { \
if ( !v ) return -1;\
v->major = Major; v->minor = Minor; v->patch = Patch;\
return 0; }
#endif /* EXTERNALCODE_H_INCLUDED_ */
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