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/* Copyright (C) 1994, 1997, 1998, 1999 Aladdin Enterprises. All rights reserved.
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This software is provided AS-IS with no warranty, either express or
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implied.
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This software is distributed under license and may not be copied,
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modified or distributed except as expressly authorized under the terms
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of the license contained in the file LICENSE in this distribution.
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For more information about licensing, please refer to
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http://www.ghostscript.com/licensing/. For information on
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commercial licensing, go to http://www.artifex.com/licensing/ or
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contact Artifex Software, Inc., 101 Lucas Valley Road #110,
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San Rafael, CA 94903, U.S.A., +1(415)492-9861.
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*/
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/* $Id: istruct.h,v 1.5 2002/06/16 04:47:10 lpd Exp $ */
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/* Interpreter-level extension of gsstruct.h */
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#ifndef istruct_INCLUDED
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# define istruct_INCLUDED
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#include "gsstruct.h"
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/* ================ Refs ================ */
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/*
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* Define the pointer type for refs. Note that if a structure contains refs,
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* both its clear_marks and its reloc_ptrs procedure must unmark them,
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* since the GC will never see the refs during the unmarking sweep.
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*/
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extern const gs_ptr_procs_t ptr_ref_procs;
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#define ptr_ref_type (&ptr_ref_procs)
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/* The structure type descriptor for (blocks of) refs. */
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/* This is defined in igc.c and exported for isave.c. */
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extern_st(st_refs);
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/*
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* Extend the GC procedure vector to include refs.
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*/
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#define refs_proc_reloc(proc)\
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void proc(ref_packed *from, ref_packed *to, gc_state_t *gcst)
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typedef struct gc_procs_with_refs_s {
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gc_procs_common;
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/* Relocate a pointer to a ref[_packed]. */
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ptr_proc_reloc((*reloc_ref_ptr), ref_packed);
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/* Relocate a block of ref[_packed]s. */
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refs_proc_reloc((*reloc_refs));
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} gc_procs_with_refs_t;
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#undef gc_proc
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#define gc_proc(gcst, proc) ((*(const gc_procs_with_refs_t **)(gcst))->proc)
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/*
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* Define enumeration and relocation macros analogous to those for
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* structures and strings. (We should go back and change the names of
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* those macros to be consistent which these, which are better, but it's
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* not worth the trouble.)
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*/
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#define ENUM_RETURN_REF(rptr)\
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return (pep->ptr = (const void *)(rptr), ptr_ref_type)
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#define ENUM_RETURN_REF_MEMBER(typ, memb)\
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ENUM_RETURN_REF(&((typ *)vptr)->memb)
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#define RELOC_REF_PTR_VAR(ptrvar)\
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ptrvar = (*gc_proc(gcst, reloc_ref_ptr))((const void *)(ptrvar), gcst)
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#define RELOC_REF_PTR_MEMBER(typ, memb)\
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RELOC_REF_PTR_VAR(((typ *)vptr)->memb)
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#define RELOC_REFS(from, upto)\
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(*gc_proc(gcst, reloc_refs))((ref_packed *)(from), (ref_packed *)(upto), gcst)
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#define RELOC_REF_VAR(refvar)\
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RELOC_REFS(&(refvar), &(refvar) + 1)
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/*
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* Define an object allocated as a struct, but actually containing refs.
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* Such objects are useful as the client_data of library structures
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* (currently only gstates and fonts).
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*/
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struct_proc_clear_marks(ref_struct_clear_marks);
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struct_proc_enum_ptrs(ref_struct_enum_ptrs);
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struct_proc_reloc_ptrs(ref_struct_reloc_ptrs);
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#define gs__st_ref_struct(scope_st, stname, stype, sname)\
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gs__st_complex_only(scope_st, stname, stype, sname, ref_struct_clear_marks,\
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ref_struct_enum_ptrs, ref_struct_reloc_ptrs, 0)
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#define gs_public_st_ref_struct(stname, stype, sname)\
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gs__st_ref_struct(public_st, stname, stype, sname)
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#define gs_private_st_ref_struct(stname, stype, sname)\
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gs__st_ref_struct(private_st, stname, stype, sname)
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#endif /* istruct_INCLUDED */
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