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Diffstat (limited to '')
| -rw-r--r-- | sal/rtl/alloc_arena.hxx | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/sal/rtl/alloc_arena.hxx b/sal/rtl/alloc_arena.hxx new file mode 100644 index 000000000..7226ef3f1 --- /dev/null +++ b/sal/rtl/alloc_arena.hxx @@ -0,0 +1,118 @@ +/* -*- 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 + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |