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/* Copyright (C) 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: gsmemret.c,v 1.5 2004/08/04 19:36:12 stefan Exp $ */
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/* Retrying memory allocator */
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#include "gx.h"
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#include "gsmemret.h"
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#include "gserrors.h"
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/* Raw memory procedures */
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private gs_memory_proc_alloc_bytes(gs_retrying_alloc_bytes_immovable);
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private gs_memory_proc_resize_object(gs_retrying_resize_object);
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private gs_memory_proc_free_object(gs_forward_free_object);
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private gs_memory_proc_stable(gs_retrying_stable);
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private gs_memory_proc_status(gs_forward_status);
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private gs_memory_proc_free_all(gs_forward_free_all);
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private gs_memory_proc_consolidate_free(gs_forward_consolidate_free);
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/* Object memory procedures */
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private gs_memory_proc_alloc_bytes(gs_retrying_alloc_bytes);
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private gs_memory_proc_alloc_struct(gs_retrying_alloc_struct);
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private gs_memory_proc_alloc_struct(gs_retrying_alloc_struct_immovable);
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private gs_memory_proc_alloc_byte_array(gs_retrying_alloc_byte_array);
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private gs_memory_proc_alloc_byte_array(gs_retrying_alloc_byte_array_immovable);
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private gs_memory_proc_alloc_struct_array(gs_retrying_alloc_struct_array);
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private gs_memory_proc_alloc_struct_array(gs_retrying_alloc_struct_array_immovable);
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private gs_memory_proc_object_size(gs_forward_object_size);
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private gs_memory_proc_object_type(gs_forward_object_type);
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private gs_memory_proc_alloc_string(gs_retrying_alloc_string);
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private gs_memory_proc_alloc_string(gs_retrying_alloc_string_immovable);
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private gs_memory_proc_resize_string(gs_retrying_resize_string);
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private gs_memory_proc_free_string(gs_forward_free_string);
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private gs_memory_proc_register_root(gs_retrying_register_root);
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private gs_memory_proc_unregister_root(gs_forward_unregister_root);
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private gs_memory_proc_enable_free(gs_forward_enable_free);
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private const gs_memory_procs_t retrying_procs = {
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/* Raw memory procedures */
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gs_retrying_alloc_bytes_immovable,
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gs_retrying_resize_object,
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gs_forward_free_object,
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gs_retrying_stable,
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gs_forward_status,
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gs_forward_free_all,
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gs_forward_consolidate_free,
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/* Object memory procedures */
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gs_retrying_alloc_bytes,
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gs_retrying_alloc_struct,
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gs_retrying_alloc_struct_immovable,
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gs_retrying_alloc_byte_array,
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gs_retrying_alloc_byte_array_immovable,
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gs_retrying_alloc_struct_array,
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gs_retrying_alloc_struct_array_immovable,
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gs_forward_object_size,
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gs_forward_object_type,
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gs_retrying_alloc_string,
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gs_retrying_alloc_string_immovable,
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gs_retrying_resize_string,
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gs_forward_free_string,
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gs_retrying_register_root,
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gs_forward_unregister_root,
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gs_forward_enable_free
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};
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/* Define a vacuous recovery procedure. */
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private gs_memory_recover_status_t
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no_recover_proc(gs_memory_retrying_t *rmem, void *proc_data)
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{
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return RECOVER_STATUS_NO_RETRY;
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}
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/* ---------- Public constructors/destructors ---------- */
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/* Initialize a gs_memory_retrying_t */
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int /* -ve error code or 0 */
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gs_memory_retrying_init(
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gs_memory_retrying_t * rmem, /* allocator to init */
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gs_memory_t * target /* allocator to wrap */
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)
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{
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rmem->stable_memory = 0;
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rmem->procs = retrying_procs;
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rmem->target = target;
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rmem->gs_lib_ctx = target->gs_lib_ctx;
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rmem->non_gc_memory = (gs_memory_t *)rmem;
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gs_memory_retrying_set_recover(rmem, no_recover_proc, NULL);
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return 0;
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}
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/* Set the recovery closure of a retrying memory manager. */
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void
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gs_memory_retrying_set_recover(gs_memory_retrying_t *rmem,
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gs_memory_recover_proc_t recover_proc,
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void *recover_proc_data)
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{
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rmem->recover_proc = recover_proc;
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rmem->recover_proc_data = recover_proc_data;
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}
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/* Release a retrying memory manager. */
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/* Note that this has no effect on the target. */
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void
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gs_memory_retrying_release(gs_memory_retrying_t *rmem)
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{
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gs_memory_free_all((gs_memory_t *)rmem, FREE_ALL_STRUCTURES,
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"gs_memory_retrying_release");
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}
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/* ---------- Accessors ------------- */
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/* Retrieve this allocator's target */
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gs_memory_t *
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gs_memory_retrying_target(const gs_memory_retrying_t *rmem)
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{
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return rmem->target;
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}
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/* -------- Private members just wrap retrying around a gs_memory --- */
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/*
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* Contrary to our usual practice, we don't use BEGIN/END here, because
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* that causes some compilers to give bogus error messages.
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*/
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#define DO_FORWARD(call_target)\
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gs_memory_retrying_t * const rmem = (gs_memory_retrying_t *)mem;\
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gs_memory_t *const target = rmem->target;\
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\
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call_target
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#define RETURN_RETRYING(result_type, call_target)\
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gs_memory_retrying_t * const rmem = (gs_memory_retrying_t *)mem;\
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gs_memory_t *const target = rmem->target;\
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result_type temp;\
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gs_memory_recover_status_t retry = RECOVER_STATUS_RETRY_OK;\
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\
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for (;;) {\
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temp = call_target;\
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if (temp != 0 || retry != RECOVER_STATUS_RETRY_OK)\
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break;\
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retry = rmem->recover_proc(rmem, rmem->recover_proc_data);\
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}\
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return temp
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/* Procedures */
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private void
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gs_forward_free_all(gs_memory_t * mem, uint free_mask, client_name_t cname)
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{
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gs_memory_retrying_t * const rmem = (gs_memory_retrying_t *)mem;
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gs_memory_t * const target = rmem->target;
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/* Only free the structures and the allocator itself. */
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rmem->target = 0;
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if (free_mask & FREE_ALL_ALLOCATOR)
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gs_free_object(target, rmem, cname);
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}
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private void
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gs_forward_consolidate_free(gs_memory_t * mem)
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{
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DO_FORWARD(target->procs.consolidate_free(target));
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}
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private byte *
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gs_retrying_alloc_bytes(gs_memory_t * mem, uint size, client_name_t cname)
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{
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RETURN_RETRYING(
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byte *,
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target->procs.alloc_bytes(target, size, cname)
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);
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}
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private byte *
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gs_retrying_alloc_bytes_immovable(gs_memory_t * mem, uint size,
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client_name_t cname)
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{
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RETURN_RETRYING(
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byte *,
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target->procs.alloc_bytes_immovable(target, size, cname)
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);
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}
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private void *
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gs_retrying_alloc_struct(gs_memory_t * mem, gs_memory_type_ptr_t pstype,
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client_name_t cname)
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{
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RETURN_RETRYING(
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void *,
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target->procs.alloc_struct(target, pstype, cname)
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);
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}
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private void *
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gs_retrying_alloc_struct_immovable(gs_memory_t * mem,
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gs_memory_type_ptr_t pstype, client_name_t cname)
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{
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RETURN_RETRYING(
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void *,
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target->procs.alloc_struct_immovable(target, pstype, cname)
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);
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}
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private byte *
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gs_retrying_alloc_byte_array(gs_memory_t * mem, uint num_elements, uint elt_size,
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client_name_t cname)
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{
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RETURN_RETRYING(
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byte *,
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target->procs.alloc_byte_array(target, num_elements,
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elt_size, cname)
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);
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}
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private byte *
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gs_retrying_alloc_byte_array_immovable(gs_memory_t * mem, uint num_elements,
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uint elt_size, client_name_t cname)
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{
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RETURN_RETRYING(
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byte *,
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target->procs.alloc_byte_array_immovable(target,
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num_elements, elt_size,
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cname)
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);
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}
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private void *
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gs_retrying_alloc_struct_array(gs_memory_t * mem, uint num_elements,
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gs_memory_type_ptr_t pstype, client_name_t cname)
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{
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RETURN_RETRYING(
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void *,
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target->procs.alloc_struct_array(target, num_elements,
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pstype, cname)
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);
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}
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private void *
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gs_retrying_alloc_struct_array_immovable(gs_memory_t * mem, uint num_elements,
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gs_memory_type_ptr_t pstype, client_name_t cname)
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{
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RETURN_RETRYING(
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void *,
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target->procs.alloc_struct_array_immovable(target,
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num_elements, pstype,
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cname)
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);
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}
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private void *
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gs_retrying_resize_object(gs_memory_t * mem, void *obj, uint new_num_elements,
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client_name_t cname)
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{
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RETURN_RETRYING(
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void *,
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target->procs.resize_object(target, obj, new_num_elements,
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cname)
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);
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}
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private uint
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gs_forward_object_size(gs_memory_t * mem, const void *ptr)
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{
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DO_FORWARD(return target->procs.object_size(target, ptr));
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}
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private gs_memory_type_ptr_t
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gs_forward_object_type(gs_memory_t * mem, const void *ptr)
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{
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DO_FORWARD(return target->procs.object_type(target, ptr));
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}
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private void
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gs_forward_free_object(gs_memory_t * mem, void *ptr, client_name_t cname)
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{
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DO_FORWARD(target->procs.free_object(target, ptr, cname));
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}
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private byte *
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gs_retrying_alloc_string(gs_memory_t * mem, uint nbytes, client_name_t cname)
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{
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RETURN_RETRYING(
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byte *,
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target->procs.alloc_string(target, nbytes, cname)
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);
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}
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private byte *
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gs_retrying_alloc_string_immovable(gs_memory_t * mem, uint nbytes,
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client_name_t cname)
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{
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RETURN_RETRYING(
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byte *,
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target->procs.alloc_string_immovable(target, nbytes, cname)
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);
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}
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private byte *
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gs_retrying_resize_string(gs_memory_t * mem, byte * data, uint old_num,
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uint new_num,
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client_name_t cname)
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{
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299 |
RETURN_RETRYING(
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byte *,
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target->procs.resize_string(target, data, old_num, new_num,
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cname)
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);
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}
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private void
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gs_forward_free_string(gs_memory_t * mem, byte * data, uint nbytes,
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client_name_t cname)
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{
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DO_FORWARD(target->procs.free_string(target, data, nbytes, cname));
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}
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private int
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gs_retrying_register_root(gs_memory_t * mem, gs_gc_root_t * rp,
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gs_ptr_type_t ptype, void **up, client_name_t cname)
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{
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315 |
RETURN_RETRYING(
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int,
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target->procs.register_root(target, rp, ptype, up, cname)
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);
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}
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private void
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gs_forward_unregister_root(gs_memory_t * mem, gs_gc_root_t * rp,
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client_name_t cname)
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{
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DO_FORWARD(target->procs.unregister_root(target, rp, cname));
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}
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private gs_memory_t *
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gs_retrying_stable(gs_memory_t * mem)
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{
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329 |
if (!mem->stable_memory) {
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gs_memory_retrying_t * const rmem = (gs_memory_retrying_t *)mem;
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gs_memory_t *stable = gs_memory_stable(rmem->target);
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332 |
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if (stable == rmem->target)
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mem->stable_memory = mem;
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else {
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336 |
gs_memory_retrying_t *retrying_stable = (gs_memory_retrying_t *)
|
|
|
337 |
gs_alloc_bytes(stable, sizeof(*rmem), "gs_retrying_stable");
|
|
|
338 |
|
|
|
339 |
if (retrying_stable) {
|
|
|
340 |
int code = gs_memory_retrying_init(retrying_stable, stable);
|
|
|
341 |
|
|
|
342 |
if (code < 0)
|
|
|
343 |
gs_free_object(stable, retrying_stable, "gs_retrying_stable");
|
|
|
344 |
else
|
|
|
345 |
mem->stable_memory = (gs_memory_t *)retrying_stable;
|
|
|
346 |
}
|
|
|
347 |
}
|
|
|
348 |
}
|
|
|
349 |
return mem->stable_memory;
|
|
|
350 |
}
|
|
|
351 |
private void
|
|
|
352 |
gs_forward_status(gs_memory_t * mem, gs_memory_status_t * pstat)
|
|
|
353 |
{
|
|
|
354 |
DO_FORWARD(target->procs.status(target, pstat));
|
|
|
355 |
}
|
|
|
356 |
private void
|
|
|
357 |
gs_forward_enable_free(gs_memory_t * mem, bool enable)
|
|
|
358 |
{
|
|
|
359 |
DO_FORWARD(target->procs.enable_free(target, enable));
|
|
|
360 |
}
|