objiface.h

Go to the documentation of this file.

#pragma once
 
 
#include <cx/container/sarray.h>
#include <cx/cx.h>
 
CX_C_BEGIN
 
 
typedef struct ObjIface ObjIface;
 
typedef struct ObjIface {
    ObjIface*
        _implements;     
    ObjIface* _parent;   
    size_t _size;        
 
    // Interface method pointers follow this header
    // The specific methods depend on the interface definition
} ObjIface;
saDeclarePtr(ObjIface);
 
#define objIfTmplName(iface) iface##_tmpl
 
#define objIfImport(iface) extern iface objIfTmplName(iface)
 
#define objIfCheck(iface)                                                       \
    static_assert(((iface)->_implements,                                        \
                   (iface)->_size,                                              \
                   offsetof(*(iface), _parent) == offsetof(ObjIface, _parent)), \
                  "Not an interface")
 
#define objIfBase(iface) \
    ((ObjIface*)((iface)->_implements, (iface)->_parent, (iface)->_size, (iface)))
 
 
CX_C_END