/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#ifndef INCLUDED_SAL_RTL_ALLOC_ARENA_HXX
#define INCLUDED_SAL_RTL_ALLOC_ARENA_HXX
#include <sal/types.h>
#include <rtl/alloc.h>
#include "alloc_impl.hxx"
/** rtl_arena_stat_type
* @internal
*/
struct rtl_arena_stat_type
{
sal_uInt64 m_alloc;
sal_uInt64 m_free;
sal_Size m_mem_total;
sal_Size m_mem_alloc;
};
/** rtl_arena_segment_type
* @internal
*/
constexpr sal_Size RTL_ARENA_SEGMENT_TYPE_HEAD = 0x01;
constexpr sal_Size RTL_ARENA_SEGMENT_TYPE_SPAN = 0x02;
constexpr sal_Size RTL_ARENA_SEGMENT_TYPE_FREE = 0x04;
constexpr sal_Size RTL_ARENA_SEGMENT_TYPE_USED = 0x08;
struct rtl_arena_segment_type
{
/* segment list linkage */
rtl_arena_segment_type * m_snext;
rtl_arena_segment_type * m_sprev;
/* free/used list linkage */
rtl_arena_segment_type * m_fnext;
rtl_arena_segment_type * m_fprev;
/* segment description */
sal_uIntPtr m_addr;
sal_Size m_size;
sal_Size m_type;
};
/** rtl_arena_type
* @internal
*/
constexpr
auto RTL_ARENA_FREELIST_SIZE =
sizeof(
void*) * 8;
constexpr
auto RTL_ARENA_HASH_SIZE = 64;
constexpr
auto RTL_ARENA_FLAG_RESCALE = 1;
/* within hash rescale operation */
struct rtl_arena_st
{
/* linkage */
rtl_arena_type * m_arena_next;
rtl_arena_type * m_arena_prev;
/* properties */
char m_name[RTL_ARENA_NAME_LENGTH + 1];
long m_flags;
rtl_memory_lock_type m_lock;
rtl_arena_stat_type m_stats;
rtl_arena_type * m_source_arena;
void * (SAL_CALL * m_source_alloc)(rtl_arena_type *, sal_Size *);
void (SAL_CALL * m_source_free) (rtl_arena_type *,
void *, sal_Size);
sal_Size m_quantum;
sal_Size m_quantum_shift;
/* log2(m_quantum) */
rtl_arena_segment_type m_segment_reserve_span_head;
rtl_arena_segment_type m_segment_reserve_head;
rtl_arena_segment_type m_segment_head;
rtl_arena_segment_type m_freelist_head[RTL_ARENA_FREELIST_SIZE];
sal_Size m_freelist_bitmap;
rtl_arena_segment_type ** m_hash_table;
rtl_arena_segment_type * m_hash_table_0[RTL_ARENA_HASH_SIZE];
sal_Size m_hash_size;
/* m_hash_mask + 1 */
sal_Size m_hash_shift;
/* log2(m_hash_size) */
};
/** gp_default_arena
* default arena with pagesize quantum
*
* @internal
*/
extern rtl_arena_type * gp_default_arena;
typedef void (*ArenaForeachFn)(
void *addr, sal_Size size);
void rtl_arena_foreach(rtl_arena_type *arena, ArenaForeachFn fn);
#endif // INCLUDED_SAL_RTL_ALLOC_ARENA_HXX
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