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- /* Copyright (C) 1994, 1997, 1998, 1999 Aladdin Enterprises. All rights reserved.
-
- This file is part of AFPL Ghostscript.
-
- AFPL Ghostscript is distributed with NO WARRANTY OF ANY KIND. No author or
- distributor accepts any responsibility for the consequences of using it, or
- for whether it serves any particular purpose or works at all, unless he or
- she says so in writing. Refer to the Aladdin Free Public License (the
- "License") for full details.
-
- Every copy of AFPL Ghostscript must include a copy of the License, normally
- in a plain ASCII text file named PUBLIC. The License grants you the right
- to copy, modify and redistribute AFPL Ghostscript, but only under certain
- conditions described in the License. Among other things, the License
- requires that the copyright notice and this notice be preserved on all
- copies.
- */
-
- /*$Id: istruct.h,v 1.2 2000/09/19 19:00:46 lpd Exp $ */
- /* 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 */
-