/* Copyright (C) 2001-2006 Artifex Software, Inc.
   All Rights Reserved.
  
   This software is provided AS-IS with no warranty, either express or
   implied.

   This software is distributed under license and may not be copied, modified
   or distributed except as expressly authorized under the terms of that
   license.  Refer to licensing information at http://www.artifex.com/
   or contact Artifex Software, Inc.,  7 Mt. Lassen Drive - Suite A-134,
   San Rafael, CA  94903, U.S.A., +1(415)492-9861, for further information.
*/

/* $Id: ialloc.h 9043 2008-08-28 22:48:19Z giles $ */
/* Interface to Ghostscript interpreter memory allocator */

#ifndef ialloc_INCLUDED
#  define ialloc_INCLUDED

#include "imemory.h"

/*
 * Define the interpreter memory manager instance.
 */
#define gs_imemory (i_ctx_p->memory)
#define idmemory (&gs_imemory)
#define iimemory (gs_imemory.current)
#define imemory ((gs_memory_t *)iimemory)
#define iimemory_local (gs_imemory.space_local)
#define imemory_local ((gs_memory_t *)iimemory_local)
#define iimemory_global (gs_imemory.space_global)
#define imemory_global ((gs_memory_t *)iimemory_global)
#define iimemory_system (gs_imemory.space_system)
#define imemory_system ((gs_memory_t *)iimemory_system)

/*
 * Aliases for invoking the standard allocator interface.
 */
#define ialloc_bytes(nbytes, cname)\
  gs_alloc_bytes(imemory, nbytes, cname)
#define ialloc_struct(typ, pstype, cname)\
  gs_alloc_struct(imemory, typ, pstype, cname)
#define ialloc_byte_array(nelts, esize, cname)\
  gs_alloc_byte_array(imemory, nelts, esize, cname)
#define ialloc_struct_array(nelts, typ, pstype, cname)\
  gs_alloc_struct_array(imemory, nelts, typ, pstype, cname)
#define ifree_object(data, cname)\
  gs_free_object(imemory, data, cname)
#define ifree_const_object(data, cname)\
  gs_free_const_object(imemory, data, cname)
#define ialloc_string(nbytes, cname)\
  gs_alloc_string(imemory, nbytes, cname)
#define iresize_string(data, oldn, newn, cname)\
  gs_resize_string(imemory, data, oldn, newn, cname)
#define ifree_string(data, nbytes, cname)\
  gs_free_string(imemory, data, nbytes, cname)
#define ifree_const_string(data, nbytes, cname)\
  gs_free_const_string(imemory, data, nbytes, cname)

/* Initialize the interpreter's allocator. */
int ialloc_init(gs_dual_memory_t *, gs_memory_t *, uint, bool);

/* ------ Internal routines ------ */

/* Reset the request values that identify the cause of a GC. */
void ialloc_reset_requested(gs_dual_memory_t *);

/* Validate the contents of memory. */
void ialloc_validate_spaces(const gs_dual_memory_t *);

#define ivalidate_spaces() ialloc_validate_spaces(idmemory)

/*
 * Local/global VM management.
 */

/* Get the space attribute of the current allocator. */
#define ialloc_space(dmem) ((dmem)->current_space)
#define icurrent_space ialloc_space(idmemory)
uint imemory_space(const gs_ref_memory_t *);

/* Select the allocation space. */
void ialloc_set_space(gs_dual_memory_t *, uint);

/* Get the l_new attribute of an allocator. */
uint imemory_new_mask(const gs_ref_memory_t *);

/* Get the save level of an allocator. */
int imemory_save_level(const gs_ref_memory_t *);

/*
 * Ref-related facilities.
 */

#ifdef r_type			/* i.e., we know about refs */

/* Allocate and free ref arrays. */
#define ialloc_ref_array(paref, attrs, nrefs, cname)\
  gs_alloc_ref_array(iimemory, paref, attrs, nrefs, cname)
#define iresize_ref_array(paref, nrefs, cname)\
  gs_resize_ref_array(iimemory, paref, nrefs, cname)
#define ifree_ref_array(paref, cname)\
  gs_free_ref_array(iimemory, paref, cname)

/* Allocate a string ref. */
#define ialloc_string_ref(psref, attrs, nbytes, cname)\
  gs_alloc_string_ref(iimemory, psref, attrs, nbytes, cname)

/* Make a ref for a newly allocated structure. */
#define make_istruct(pref,attrs,ptr)\
  make_struct(pref, (attrs) | icurrent_space, ptr)
#define make_istruct_new(pref,attrs,ptr)\
  make_struct_new(pref, (attrs) | icurrent_space, ptr)
#define make_iastruct(pref,attrs,ptr)\
  make_astruct(pref, (attrs) | icurrent_space, ptr)
#define make_iastruct_new(pref,attrs,ptr)\
  make_astruct_new(pref, (attrs) | icurrent_space, ptr)

#endif /* ifdef r_type */

#endif /* ialloc_INCLUDED */
