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/* Copyright (C) 1993, 1994, 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: imemory.h,v 1.5 2002/06/16 04:47:10 lpd Exp $ */
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/* Ghostscript memory allocator extensions for interpreter level */
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#ifndef imemory_INCLUDED
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# define imemory_INCLUDED
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#include "ivmspace.h"
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/*
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* The interpreter level of Ghostscript defines a "subclass" extension
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* of the allocator interface in gsmemory.h, by adding the ability to
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* allocate and free arrays of refs, and by adding the distinction
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* between local, global, and system allocation.
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*/
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#include "gsalloc.h"
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#ifndef gs_ref_memory_DEFINED
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# define gs_ref_memory_DEFINED
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typedef struct gs_ref_memory_s gs_ref_memory_t;
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#endif
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/* Allocate a ref array. */
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int gs_alloc_ref_array(gs_ref_memory_t * mem, ref * paref,
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uint attrs, uint num_refs, client_name_t cname);
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/* Resize a ref array. */
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/* Currently this is only implemented for shrinking, */
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/* not growing. */
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int gs_resize_ref_array(gs_ref_memory_t * mem, ref * paref,
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uint new_num_refs, client_name_t cname);
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/* Free a ref array. */
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void gs_free_ref_array(gs_ref_memory_t * mem, ref * paref,
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client_name_t cname);
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/* Allocate a string ref. */
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int gs_alloc_string_ref(gs_ref_memory_t * mem, ref * psref,
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uint attrs, uint nbytes, client_name_t cname);
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/* Register a ref root. This just calls gs_register_root. */
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/* Note that ref roots are a little peculiar: they assume that */
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/* the ref * that they point to points to a *statically* allocated ref. */
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int gs_register_ref_root(gs_memory_t *mem, gs_gc_root_t *root,
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void **pp, client_name_t cname);
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/*
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* The interpreter allocator can allocate in either local or global VM,
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* and can switch between the two dynamically. In Level 1 configurations,
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* global VM is the same as local; however, this is *not* currently true in
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* a Level 2 system running in Level 1 mode. In addition, there is a third
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* VM space, system VM, that exists in both modes and is used for objects
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* that must not be affected by even the outermost save/restore (stack
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* segments and names).
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*
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* NOTE: since the interpreter's (only) instances of gs_dual_memory_t are
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* embedded in-line in context state structures, pointers to these
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* instances must not be stored anywhere that might persist across a
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* garbage collection.
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*/
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#ifndef gs_dual_memory_DEFINED
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# define gs_dual_memory_DEFINED
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typedef struct gs_dual_memory_s gs_dual_memory_t;
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#endif
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struct gs_dual_memory_s {
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gs_ref_memory_t *current; /* = ...global or ...local */
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vm_spaces spaces; /* system, global, local */
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uint current_space; /* = current->space */
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/* Garbage collection hook */
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int (*reclaim) (gs_dual_memory_t *, int);
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/* Masks for store checking, see isave.h. */
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uint test_mask;
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uint new_mask;
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};
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#define public_st_gs_dual_memory() /* in ialloc.c */\
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gs_public_st_simple(st_gs_dual_memory, gs_dual_memory_t, "gs_dual_memory_t")
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#define st_gs_dual_memory_num_ptrs 0
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#endif /* imemory_INCLUDED */
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