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befd38bf51
Removed all extraneous copies by adding the class 'InterfaceReg' which will construct a new interface, and link it to the engine's static register. The Source Engine macro 'EXPOSE_INTERFACE_FN' will help utilizing this. The game module from the plugin is not obtained through the process environment block, so the executable is no longer sensitive to names.
67 lines
2.6 KiB
C++
67 lines
2.6 KiB
C++
#ifndef INTERFACE_H
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#define INTERFACE_H
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enum class InterfaceStatus_t : int
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{
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IFACE_OK = 0,
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IFACE_FAILED
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};
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//-----------------------------------------------------------------------------
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// Mapping of interface string to globals
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//-----------------------------------------------------------------------------
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typedef void* (*CreateInterfaceFn)(const char* pName, int* pReturnCode);
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typedef void* (*InstantiateInterfaceFn)();
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typedef HINSTANCE CSysModule;
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class InterfaceReg
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{
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public:
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InterfaceReg(InstantiateInterfaceFn fn, const char* pName);
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public:
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InstantiateInterfaceFn m_CreateFn;
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const char* m_pName;
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InterfaceReg* m_pNext;
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};
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extern InterfaceReg** s_ppInterfaceRegs;
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//-----------------------------------------------------------------------------
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// Use this to expose an interface that can have multiple instances.
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// e.g.:
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// EXPOSE_INTERFACE( CInterfaceImp, IInterface, "MyInterface001" )
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// This will expose a class called CInterfaceImp that implements IInterface (a pure class)
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// clients can receive a pointer to this class by calling CreateInterface( "MyInterface001" )
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//
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// In practice, the shared header file defines the interface (IInterface) and version name ("MyInterface001")
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// so that each component can use these names/vtables to communicate
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//
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// A single class can support multiple interfaces through multiple inheritance
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//
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// Use this if you want to write the factory function.
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#define EXPOSE_INTERFACE_FN(functionName, interfaceName, versionName) \
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{ \
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static InterfaceReg __g_Create##interfaceName##_reg(functionName, versionName); \
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}
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#define EXPOSE_INTERFACE(className, interfaceName, versionName) \
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{ \
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static void* __Create##className##_interface() {return static_cast<interfaceName *>( new className );} \
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static InterfaceReg __g_Create##className##_reg(__Create##className##_interface, versionName ); \
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}
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// Use this to expose a singleton interface with a global variable you've created.
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#define EXPOSE_SINGLE_INTERFACE_GLOBALVAR(className, interfaceName, versionName, globalVarName) \
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{ \
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static void* __Create##className##interfaceName##_interface() {return static_cast<interfaceName *>( &globalVarName );} \
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static InterfaceReg __g_Create##className##interfaceName##_reg(__Create##className##interfaceName##_interface, versionName); \
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}
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// Use this to expose a singleton interface. This creates the global variable for you automatically.
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#define EXPOSE_SINGLE_INTERFACE(className, interfaceName, versionName) \
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{ \
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static className __g_##className##_singleton; \
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} \
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EXPOSE_SINGLE_INTERFACE_GLOBALVAR(className, interfaceName, versionName, __g_##className##_singleton)
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#endif // INTERFACE_H
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