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/* Copyright (C) 1994, 1995, 1996, 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: igc.h,v 1.9 2004/09/28 05:34:29 giles Exp $ */
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/* Internal interfaces in Ghostscript GC */
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#ifndef igc_INCLUDED
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# define igc_INCLUDED
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#include "istruct.h"
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/* Declare the vm_reclaim procedure for the real GC. */
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extern vm_reclaim_proc(gs_gc_reclaim);
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/* Define the procedures shared among a "genus" of structures. */
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/* Currently there are only two genera: refs, and all other structures. */
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struct struct_shared_procs_s {
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/* Clear the relocation information in an object. */
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#define gc_proc_clear_reloc(proc)\
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void proc(obj_header_t *pre, uint size)
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gc_proc_clear_reloc((*clear_reloc));
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/* Compute any internal relocation for a marked object. */
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/* Return true if the object should be kept. */
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/* The reloc argument shouldn't be required, */
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/* but we need it for ref objects. */
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#define gc_proc_set_reloc(proc)\
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bool proc(obj_header_t *pre, uint reloc, uint size)
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gc_proc_set_reloc((*set_reloc));
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/* Compact an object. */
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#define gc_proc_compact(proc)\
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void proc(const gs_memory_t *cmem, obj_header_t *pre, obj_header_t *dpre, uint size)
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gc_proc_compact((*compact));
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};
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/* Define the structure for holding GC state. */
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/*typedef struct gc_state_s gc_state_t; *//* in gsstruct.h */
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#ifndef name_table_DEFINED
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# define name_table_DEFINED
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typedef struct name_table_s name_table;
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#endif
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struct gc_state_s {
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const gc_procs_with_refs_t *procs; /* must be first */
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chunk_locator_t loc;
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vm_spaces spaces;
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int min_collect; /* avm_space */
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bool relocating_untraced; /* if true, we're relocating */
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/* pointers from untraced spaces */
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gs_memory_t *heap; /* for extending mark stack */
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name_table *ntable; /* (implicitly referenced by names) */
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#ifdef DEBUG
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chunk_t *container;
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#endif
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};
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/* Exported by igcref.c for igc.c */
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ptr_proc_unmark(ptr_ref_unmark);
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ptr_proc_mark(ptr_ref_mark);
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/*ref_packed *gs_reloc_ref_ptr(const ref_packed *, gc_state_t *); */
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/* Exported by ilocate.c for igc.c */
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void ialloc_validate_memory(const gs_ref_memory_t *, gc_state_t *);
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void ialloc_validate_chunk(const chunk_t *, gc_state_t *);
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void ialloc_validate_object(const obj_header_t *, const chunk_t *,
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gc_state_t *);
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/* Exported by igc.c for ilocate.c */
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const gs_memory_t * gcst_get_memory_ptr(gc_state_t *gcst);
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/* Macro for returning a relocated pointer */
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const void *print_reloc_proc(const void *obj, const char *cname,
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const void *robj);
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#ifdef DEBUG
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# define print_reloc(obj, cname, nobj)\
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(gs_debug_c('9') ? print_reloc_proc(obj, cname, nobj) : nobj)
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#else
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# define print_reloc(obj, cname, nobj) (nobj)
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#endif
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#endif /* igc_INCLUDED */
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