rtti.h

来自「开放源码的编译器open watcom 1.6.0版的源代码」· C头文件 代码 · 共 87 行

/****************************************************************************
*
*                            Open Watcom Project
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*    Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved.
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*  ========================================================================
*
*    This file contains Original Code and/or Modifications of Original
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* Description:  WHEN YOU FIGURE OUT WHAT THIS FILE DOES, PLEASE
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#ifndef _RTTI_H
#define _RTTI_H

typedef struct _rtti_adjust_class RTTI_CLASS;
typedef struct _rtti_typeid RTTI_TYPEID;
typedef struct _rtti_adjust_vfptr RTTI_VFPTR;

struct _rtti_adjust_class {
    RTTI_CLASS          *next;
    RTTI_VFPTR          *vfptrs;        // list of all vfptr adjustors
    TYPE                class_type;     // host class type
    SYMBOL              sym;            // symbol to reference from vftable
    target_offset_t     offset;         // current offset from start of symbol
    unsigned            done : 1;       // all vfptrs have been registered
    unsigned            gen : 1;        // must be generated
    unsigned            cg_gen : 1;     // has been generated
    unsigned            free : 1;       // used for PCH
    unsigned            too_big : 1;    // cannot fit in segment
};

struct _rtti_typeid {
    RTTI_TYPEID         *next;
    TYPE                type;           // type for typeid
    SYMBOL              sym;            // symbol to reference
    unsigned            free : 1;       // used for PCH
};

struct _rtti_adjust_vfptr {
    RTTI_VFPTR          *next;
    unsigned            control;        // RA_* control mask
    target_offset_t     delta;          // delta for adjustor
    target_offset_t     offset;         // offset from start of symbol
    unsigned            free : 1;       // used for PCH
};

#define RttiAdjustSize()        ( 2 * TARGET_UINT )
#define RttiClassSize()         ( TARGET_UINT + CgDataPtrSize() )
#define RttiLeapSize()          ( 2 * TARGET_SHORT + 1 * TARGET_UINT + CgDataPtrSize() )

extern SYMBOL RttiBuild( SCOPE, CLASS_TABLE *, target_offset_t * );
extern void RttiDone( SCOPE );
extern void RttiRef( SYMBOL );
extern void RttiWalk( void (*)( RTTI_CLASS * ) );

// len is strlen( raw_name )
extern unsigned TypeidSize( unsigned len );
#define TypeidRawNameOffset()   ( CgDataPtrSize() )

extern SYMBOL TypeidAccess( TYPE );
extern SYMBOL TypeidICAccess( TYPE );
extern void TypeidRef( SYMBOL );
extern void TypeidWalk( void (*)( RTTI_TYPEID * ) );

#endif