/* 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: icontext.h 8022 2007-06-05 22:23:38Z giles $ */
/* Externally visible context state */
/* Requires iref.h, stdio_.h */

#ifndef icontext_INCLUDED
#  define icontext_INCLUDED

#include "gsstype.h"		/* for extern_st */
#include "icstate.h"

/* Declare the GC descriptor for context states. */
extern_st(st_context_state);

/*
 * Define the procedure for resetting user parameters when switching
 * contexts. This is defined in either zusparam.c or inouparm.c.
 */
extern int set_user_params(i_ctx_t *i_ctx_p, const ref * paramdict);

/* Allocate the state of a context, always in local VM. */
/* If *ppcst == 0, allocate the state object as well. */
int context_state_alloc(gs_context_state_t ** ppcst,
			const ref *psystem_dict,
			const gs_dual_memory_t * dmem);

/* Load the state of the interpreter from a context. */
/* The argument is not const because caches may be updated. */
int context_state_load(gs_context_state_t *);

/* Store the state of the interpreter into a context. */
int context_state_store(gs_context_state_t *);

/* Free the contents of the state of a context, always to its local VM. */
/* Return a mask of which of its VMs, if any, we freed. */
int context_state_free(gs_context_state_t *);

#endif /* icontext_INCLUDED */
