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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_IMPL_HXX
#define INCLUDED_SAL_RTL_ALLOC_IMPL_HXX
#include <sal/types.h>
/** Alignment macros
*/
#if SAL_TYPES_ALIGNMENT4 > 1
#define RTL_MEMORY_ALIGNMENT_4 SAL_TYPES_ALIGNMENT4
#else
#define RTL_MEMORY_ALIGNMENT_4 sizeof(int)
#endif /* SAL_TYPES_ALIGNMENT4 */
#if SAL_TYPES_ALIGNMENT8 > 1
#define RTL_MEMORY_ALIGNMENT_8 SAL_TYPES_ALIGNMENT8
#else
#define RTL_MEMORY_ALIGNMENT_8 sizeof(void*)
#endif /* SAL_TYPES_ALIGNMENT8 */
#if 0 /* @@@ */
#define RTL_MEMORY_ALIGNMENT_1 8
#define RTL_MEMORY_ALIGNMENT_2 (sizeof(void*) * 2)
#endif /* @@@ */
#define RTL_MEMORY_ALIGN(value, align) (((value) + ((align) - 1)) & ~((align) - 1))
#define RTL_MEMORY_ISP2(value) (((value) & ((value) - 1)) == 0)
#define RTL_MEMORY_P2ALIGN(value, align) ((value) & -static_cast<sal_IntPtr>(align))
#define RTL_MEMORY_P2ROUNDUP(value, align) \
(-(-static_cast<sal_IntPtr>(value) & -static_cast<sal_IntPtr>(align)))
#define RTL_MEMORY_P2END(value, align) \
(-(~static_cast<sal_IntPtr>(value) & -static_cast<sal_IntPtr>(align)))
/** highbit(): log2() + 1
(complexity O(1))
*/
static inline unsigned int highbit(sal_Size n)
{
unsigned int k = 1;
if (n == 0)
return 0;
if constexpr (sizeof(n) >= 8)
{
if (n & 0xffffffff00000000)
{
k |= 32;
n >>= 32;
}
}
if (n & 0xffff0000)
{
k |= 16;
n >>= 16;
}
if (n & 0xff00)
{
k |= 8;
n >>= 8;
}
if (n & 0xf0)
{
k |= 4;
n >>= 4;
}
if (n & 0x0c)
{
k |= 2;
n >>= 2;
}
if (n & 0x02)
k++;
return k;
}
/** find first bit set
(complexity O(1))
*/
static inline unsigned int lowbit(sal_Size n)
{
unsigned int k = 1;
if (n == 0)
return 0;
if constexpr (sizeof(n) >= 8)
{
if (!(n & 0xffffffff))
{
k |= 32;
n >>= 32;
}
}
if (!(n & 0xffff))
{
k |= 16;
n >>= 16;
}
if (!(n & 0xff))
{
k |= 8;
n >>= 8;
}
if (!(n & 0xf))
{
k |= 4;
n >>= 4;
}
if (!(n & 0x3))
{
k |= 2;
n >>= 2;
}
if (!(n & 0x1))
k++;
return k;
}
/** Queue manipulation macros
(doubly linked circular list)
(complexity O(1))
*/
#define QUEUE_STARTED_NAMED(entry, name) \
(((entry)->m_##name##next == (entry)) && ((entry)->m_##name##prev == (entry)))
#define QUEUE_START_NAMED(entry, name) \
{ \
(entry)->m_##name##next = (entry); \
(entry)->m_##name##prev = (entry); \
}
#define QUEUE_REMOVE_NAMED(entry, name) \
{ \
(entry)->m_##name##prev->m_##name##next = (entry)->m_##name##next; \
(entry)->m_##name##next->m_##name##prev = (entry)->m_##name##prev; \
QUEUE_START_NAMED(entry, name); \
}
#define QUEUE_INSERT_HEAD_NAMED(head, entry, name) \
{ \
(entry)->m_##name##prev = (head); \
(entry)->m_##name##next = (head)->m_##name##next; \
(head)->m_##name##next = (entry); \
(entry)->m_##name##next->m_##name##prev = (entry); \
}
#define QUEUE_INSERT_TAIL_NAMED(head, entry, name) \
{ \
(entry)->m_##name##next = (head); \
(entry)->m_##name##prev = (head)->m_##name##prev; \
(head)->m_##name##prev = (entry); \
(entry)->m_##name##prev->m_##name##next = (entry); \
}
#if defined(SAL_UNX)
#include <pthread.h>
typedef pthread_mutex_t rtl_memory_lock_type;
#define RTL_MEMORY_LOCK_INIT(lock) pthread_mutex_init((lock), nullptr)
#define RTL_MEMORY_LOCK_DESTROY(lock) pthread_mutex_destroy((lock))
#define RTL_MEMORY_LOCK_ACQUIRE(lock) pthread_mutex_lock((lock))
#define RTL_MEMORY_LOCK_RELEASE(lock) pthread_mutex_unlock((lock))
#elif defined(_WIN32)
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
typedef CRITICAL_SECTION rtl_memory_lock_type;
#define RTL_MEMORY_LOCK_INIT(lock) InitializeCriticalSection((lock))
#define RTL_MEMORY_LOCK_DESTROY(lock) DeleteCriticalSection((lock))
#define RTL_MEMORY_LOCK_ACQUIRE(lock) EnterCriticalSection((lock))
#define RTL_MEMORY_LOCK_RELEASE(lock) LeaveCriticalSection((lock))
#else
#error Unknown platform
#endif /* SAL_UNX | _WIN32 */
/** Cache creation flags.
@internal
*/
#define RTL_CACHE_FLAG_NOMAGAZINE (1 << 13) /* w/o magazine layer */
#endif // INCLUDED_SAL_RTL_ALLOC_IMPL_HXX
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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