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+/* -*- 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: */