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/* Copyright (C) 1992, 1993, 1994, 1997, 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: zvmem2.c,v 1.7 2002/11/20 18:56:56 igor Exp $ */
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/* Level 2 "Virtual memory" operators */
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#include "ghost.h"
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#include "oper.h"
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#include "estack.h"
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#include "ialloc.h" /* for ivmspace.h */
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#include "ivmspace.h"
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#include "ivmem2.h"
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#include "store.h"
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/* Garbage collector control parameters. */
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#define DEFAULT_VM_THRESHOLD_SMALL 100000
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#define DEFAULT_VM_THRESHOLD_LARGE 1000000
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#define MIN_VM_THRESHOLD 1
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#define MAX_VM_THRESHOLD max_long
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/* ------ Local/global VM control ------ */
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/* <bool> .setglobal - */
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private int
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zsetglobal(i_ctx_t *i_ctx_p)
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{
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os_ptr op = osp;
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check_type(*op, t_boolean);
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ialloc_set_space(idmemory,
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(op->value.boolval ? avm_global : avm_local));
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pop(1);
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return 0;
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}
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/* <bool> .currentglobal - */
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private int
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zcurrentglobal(i_ctx_t *i_ctx_p)
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{
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os_ptr op = osp;
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push(1);
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make_bool(op, ialloc_space(idmemory) != avm_local);
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return 0;
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}
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/* <any> gcheck/scheck <bool> */
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private int
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zgcheck(i_ctx_t *i_ctx_p)
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{
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os_ptr op = osp;
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check_op(1);
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make_bool(op, (r_is_local(op) ? false : true));
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return 0;
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}
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/* ------ Garbage collector control ------ */
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/* These routines are exported for setuserparams. */
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/*
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* <int> setvmthreshold -
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*
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* This is implemented as a PostScript procedure that calls setuserparams.
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*/
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int
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set_vm_threshold(i_ctx_t *i_ctx_p, long val)
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{
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if (val < -1)
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return_error(e_rangecheck);
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else if (val == -1)
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val = (gs_debug_c('.') ? DEFAULT_VM_THRESHOLD_SMALL :
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DEFAULT_VM_THRESHOLD_LARGE);
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else if (val < MIN_VM_THRESHOLD)
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val = MIN_VM_THRESHOLD;
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else if (val > MAX_VM_THRESHOLD)
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val = MAX_VM_THRESHOLD;
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gs_memory_set_vm_threshold(idmemory->space_global, val);
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gs_memory_set_vm_threshold(idmemory->space_local, val);
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return 0;
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}
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int
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set_vm_reclaim(i_ctx_t *i_ctx_p, long val)
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{
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if (val >= -2 && val <= 0) {
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gs_memory_set_vm_reclaim(idmemory->space_system, (val >= -1));
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gs_memory_set_vm_reclaim(idmemory->space_global, (val >= -1));
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gs_memory_set_vm_reclaim(idmemory->space_local, (val == 0));
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return 0;
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} else
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return_error(e_rangecheck);
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}
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/*
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* <int> .vmreclaim -
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*
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* This implements only immediate garbage collection: enabling and
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* disabling GC is implemented by calling setuserparams.
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*/
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private int
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zvmreclaim(i_ctx_t *i_ctx_p)
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{
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os_ptr op = osp;
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check_type(*op, t_integer);
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if (op->value.intval == 1 || op->value.intval == 2) {
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/* Force the interpreter to store its state and exit. */
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/* The interpreter's caller will do the actual GC. */
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return_error(e_VMreclaim);
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}
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return_error(e_rangecheck);
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}
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/* ------ Initialization procedure ------ */
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/* The VM operators are defined even if the initial language level is 1, */
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/* because we need them during initialization. */
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const op_def zvmem2_op_defs[] =
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{
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{"0.currentglobal", zcurrentglobal},
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{"1.gcheck", zgcheck},
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{"1.setglobal", zsetglobal},
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/* The rest of the operators are defined only in Level 2. */
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op_def_begin_level2(),
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{"1.vmreclaim", zvmreclaim},
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op_def_end(0)
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};
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