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/* Copyright (C) 1994, 1997, 1998, 1999 Aladdin Enterprises. All rights reserved.
This software is licensed to a single customer by Artifex Software Inc.
under the terms of a specific OEM agreement.
*/
/*$RCSfile$ $Revision$ */
/* Interpreter-level extension of gsstruct.h */
#ifndef istruct_INCLUDED
# define istruct_INCLUDED
#include "gsstruct.h"
/* ================ Refs ================ */
/*
* Define the pointer type for refs. Note that if a structure contains refs,
* both its clear_marks and its reloc_ptrs procedure must unmark them,
* since the GC will never see the refs during the unmarking sweep.
*/
extern const gs_ptr_procs_t ptr_ref_procs;
#define ptr_ref_type (&ptr_ref_procs)
/* The structure type descriptor for (blocks of) refs. */
/* This is defined in igc.c and exported for isave.c. */
extern_st(st_refs);
/*
* Extend the GC procedure vector to include refs.
*/
#define refs_proc_reloc(proc)\
void proc(P3(ref_packed *from, ref_packed *to, gc_state_t *gcst))
typedef struct gc_procs_with_refs_s {
gc_procs_common;
/* Relocate a pointer to a ref[_packed]. */
ptr_proc_reloc((*reloc_ref_ptr), ref_packed);
/* Relocate a block of ref[_packed]s. */
refs_proc_reloc((*reloc_refs));
} gc_procs_with_refs_t;
#undef gc_proc
#define gc_proc(gcst, proc) ((*(const gc_procs_with_refs_t **)(gcst))->proc)
/*
* Define enumeration and relocation macros analogous to those for
* structures and strings. (We should go back and change the names of
* those macros to be consistent which these, which are better, but it's
* not worth the trouble.)
*/
#define ENUM_RETURN_REF(rptr)\
return (pep->ptr = (const void *)(rptr), ptr_ref_type)
#define ENUM_RETURN_REF_MEMBER(typ, memb)\
ENUM_RETURN_REF(&((typ *)vptr)->memb)
#define RELOC_REF_PTR_VAR(ptrvar)\
ptrvar = (*gc_proc(gcst, reloc_ref_ptr))((const void *)(ptrvar), gcst)
#define RELOC_REF_PTR_MEMBER(typ, memb)\
RELOC_REF_PTR_VAR(((typ *)vptr)->memb)
#define RELOC_REFS(from, upto)\
(*gc_proc(gcst, reloc_refs))((ref_packed *)(from), (ref_packed *)(upto), gcst)
#define RELOC_REF_VAR(refvar)\
RELOC_REFS(&(refvar), &(refvar) + 1)
/*
* Define an object allocated as a struct, but actually containing refs.
* Such objects are useful as the client_data of library structures
* (currently only gstates and fonts).
*/
struct_proc_clear_marks(ref_struct_clear_marks);
struct_proc_enum_ptrs(ref_struct_enum_ptrs);
struct_proc_reloc_ptrs(ref_struct_reloc_ptrs);
#define gs__st_ref_struct(scope_st, stname, stype, sname)\
gs__st_complex_only(scope_st, stname, stype, sname, ref_struct_clear_marks,\
ref_struct_enum_ptrs, ref_struct_reloc_ptrs, 0)
#define gs_public_st_ref_struct(stname, stype, sname)\
gs__st_ref_struct(public_st, stname, stype, sname)
#define gs_private_st_ref_struct(stname, stype, sname)\
gs__st_ref_struct(private_st, stname, stype, sname)
#endif /* istruct_INCLUDED */
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