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Diffstat (limited to '')
| -rw-r--r-- | sal/rtl/alloc_impl.hxx | 219 |
1 files changed, 219 insertions, 0 deletions
diff --git a/sal/rtl/alloc_impl.hxx b/sal/rtl/alloc_impl.hxx new file mode 100644 index 000000000..29c24cc99 --- /dev/null +++ b/sal/rtl/alloc_impl.hxx @@ -0,0 +1,219 @@ +/* -*- 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 <unistd.h> +#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: */ |