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- /* Copyright (C) 1992, 1993, 1994, 1997, 1998, 1999 Aladdin Enterprises. All rights reserved.
-
- This file is part of AFPL Ghostscript.
-
- AFPL Ghostscript is distributed with NO WARRANTY OF ANY KIND. No author or
- distributor accepts any responsibility for the consequences of using it, or
- for whether it serves any particular purpose or works at all, unless he or
- she says so in writing. Refer to the Aladdin Free Public License (the
- "License") for full details.
-
- Every copy of AFPL Ghostscript must include a copy of the License, normally
- in a plain ASCII text file named PUBLIC. The License grants you the right
- to copy, modify and redistribute AFPL Ghostscript, but only under certain
- conditions described in the License. Among other things, the License
- requires that the copyright notice and this notice be preserved on all
- copies.
- */
-
- /*$Id: zvmem2.c,v 1.2 2000/09/19 19:00:55 lpd Exp $ */
- /* Level 2 "Virtual memory" operators */
- #include "ghost.h"
- #include "oper.h"
- #include "estack.h"
- #include "ialloc.h" /* for ivmspace.h */
- #include "ivmspace.h"
- #include "ivmem2.h"
- #include "store.h"
-
- /* Garbage collector control parameters. */
- #define DEFAULT_VM_THRESHOLD_SMALL 20000
- #define DEFAULT_VM_THRESHOLD_LARGE 250000
- #define MIN_VM_THRESHOLD 1
- #define MAX_VM_THRESHOLD max_long
-
- /* ------ Local/global VM control ------ */
-
- /* <bool> .setglobal - */
- private int
- zsetglobal(i_ctx_t *i_ctx_p)
- {
- os_ptr op = osp;
- check_type(*op, t_boolean);
- ialloc_set_space(idmemory,
- (op->value.boolval ? avm_global : avm_local));
- pop(1);
- return 0;
- }
-
- /* <bool> .currentglobal - */
- private int
- zcurrentglobal(i_ctx_t *i_ctx_p)
- {
- os_ptr op = osp;
-
- push(1);
- make_bool(op, ialloc_space(idmemory) != avm_local);
- return 0;
- }
-
- /* <any> gcheck/scheck <bool> */
- private int
- zgcheck(i_ctx_t *i_ctx_p)
- {
- os_ptr op = osp;
-
- check_op(1);
- make_bool(op, (r_is_local(op) ? false : true));
- return 0;
- }
-
- /* ------ Garbage collector control ------ */
-
- /* These routines are exported for setuserparams. */
-
- /*
- * <int> setvmthreshold -
- *
- * This is implemented as a PostScript procedure that calls setuserparams.
- */
- int
- set_vm_threshold(i_ctx_t *i_ctx_p, long val)
- {
- gs_memory_gc_status_t stat;
-
- if (val < -1)
- return_error(e_rangecheck);
- else if (val == -1)
- val = (gs_debug_c('.') ? DEFAULT_VM_THRESHOLD_SMALL :
- DEFAULT_VM_THRESHOLD_LARGE);
- else if (val < MIN_VM_THRESHOLD)
- val = MIN_VM_THRESHOLD;
- else if (val > MAX_VM_THRESHOLD)
- val = MAX_VM_THRESHOLD;
- gs_memory_gc_status(idmemory->space_global, &stat);
- stat.vm_threshold = val;
- gs_memory_set_gc_status(idmemory->space_global, &stat);
- gs_memory_gc_status(idmemory->space_local, &stat);
- stat.vm_threshold = val;
- gs_memory_set_gc_status(idmemory->space_local, &stat);
- return 0;
- }
-
- /*
- * <int> .vmreclaim -
- *
- * This implements only immediate garbage collection: enabling and
- * disabling GC is implemented by calling setuserparams.
- */
- int
- set_vm_reclaim(i_ctx_t *i_ctx_p, long val)
- {
- if (val >= -2 && val <= 0) {
- gs_memory_gc_status_t stat;
-
- gs_memory_gc_status(idmemory->space_system, &stat);
- stat.enabled = val >= -1;
- gs_memory_set_gc_status(idmemory->space_system, &stat);
- gs_memory_gc_status(idmemory->space_global, &stat);
- stat.enabled = val >= -1;
- gs_memory_set_gc_status(idmemory->space_global, &stat);
- gs_memory_gc_status(idmemory->space_local, &stat);
- stat.enabled = val == 0;
- gs_memory_set_gc_status(idmemory->space_local, &stat);
- return 0;
- } else
- return_error(e_rangecheck);
- }
- private int
- zvmreclaim(i_ctx_t *i_ctx_p)
- {
- os_ptr op = osp;
-
- check_type(*op, t_integer);
- if (op->value.intval == 1 || op->value.intval == 2) {
- /* Force the interpreter to store its state and exit. */
- /* The interpreter's caller will do the actual GC. */
- return_error(e_VMreclaim);
- }
- return_error(e_rangecheck);
- }
-
- /* ------ Initialization procedure ------ */
-
- /* The VM operators are defined even if the initial language level is 1, */
- /* because we need them during initialization. */
- const op_def zvmem2_op_defs[] =
- {
- {"0.currentglobal", zcurrentglobal},
- {"1.gcheck", zgcheck},
- {"1.setglobal", zsetglobal},
- /* The rest of the operators are defined only in Level 2. */
- op_def_begin_level2(),
- {"1.vmreclaim", zvmreclaim},
- op_def_end(0)
- };
-