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#ifndef INTERFACE_H
#define INTERFACE_H
typedef void* (*InstantiateInterfaceFn)();
// Used internally to register classes.
class InterfaceReg
{
public:
InterfaceReg(InstantiateInterfaceFn fn, const char* pName);
InstantiateInterfaceFn m_CreateFn;
const char* m_pName;
InterfaceReg* m_pNext;
};
// Use this to expose an interface that can have multiple instances.
#define EXPOSE_INTERFACE(className, interfaceName, versionName) \
static void* __Create##className##_interface() \
{ \
return static_cast<interfaceName*>(new className); \
} \
static InterfaceReg __g_Create##className##_reg(__Create##className##_interface, versionName);
#define EXPOSE_SINGLE_INTERFACE_GLOBALVAR(className, interfaceName, versionName, globalVarName) \
static void* __Create##className##interfaceName##_interface() \
{ \
return static_cast<interfaceName*>(&globalVarName); \
} \
static InterfaceReg __g_Create##className##interfaceName##_reg(__Create##className##interfaceName##_interface, versionName);
// Use this to expose a singleton interface. This creates the global variable for you automatically.
#define EXPOSE_SINGLE_INTERFACE(className, interfaceName, versionName) \
static className __g_##className##_singleton; \
EXPOSE_SINGLE_INTERFACE_GLOBALVAR(className, interfaceName, versionName, __g_##className##_singleton)
extern "C" __declspec(dllexport) void* CreateInterface(const char* pName, InterfaceStatus* pReturnCode);
#endif
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