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/*
This file is part of the KDE libraries
Copyright (C) 2000 Waldo Bastian (bastian@kde.org)
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
//----------------------------------------------------------------------------
//
// KDE Virtual Memory Allocator
#ifndef KVMALLOCATOR_H
#define KVMALLOCATOR_H
#include <sys/types.h>
#include "kdelibs_export.h"
class KVMAllocatorPrivate;
/**
* KVMAllocator is a virtual memory allocator.
* Memory is allocated block-wise in a tmp file.
*
* @author Waldo Bastian <bastian@kde.org>
*/
class KDECORE_EXPORT KVMAllocator
{
public:
struct Block;
/**
* Create a KVMAllocator
*/
KVMAllocator();
/**
* Destruct the KVMAllocator and release all memory.
*/
~KVMAllocator();
/**
* Allocate a virtual memory block.
* @param _size Size in bytes of the memory block.
* @return the allocated memory block
*/
Block *allocate(size_t _size);
/**
* Free a virtual memory block.
* @param block the block to free
*/
void free(Block *block);
/**
* Copy @p length bytes from @p _offset in the virtual memory block
* @p src to normal memory at address *dest.
* @param dest the destination of the data
* @param src the source block
* @param _offset the offset in the source block
* @param length the length of the data to copy
* @return true on success, false on failure, see errno for details
* @since 3.2
*/
bool copyBlock(void *dest, Block *src, int _offset = 0, size_t length = 0);
/**
* @deprecated
* @see copyBlock
*/
void copy(void *dest, Block *src, int _offset = 0, size_t length = 0) KDE_DEPRECATED;
/**
* Copy @p length bytes from normal memory at address @p src to
* @p _offset in the virtual memory block @p dest.
* @param dest the block to copy the data to
* @param src the source location of the data
* @param _offset the offset in the destination block
* @param length the length of the data to copy
* @return true on success, false on failure, see errno for details
* @since 3.2
*/
bool copyBlock(Block *dest, void *src, int _offset = 0, size_t length = 0);
/**
* @deprecated
* @see copyBlock
*/
void copy(Block *dest, void *src, int _offset = 0, size_t length = 0) KDE_DEPRECATED;
/**
* Map a virtual memory block in memory
* @param block the block to map
*/
void *map(Block *block);
/**
* Unmap a virtual memory block
* @param block the block to unmap
*/
void unmap(Block *block);
private:
KVMAllocatorPrivate *d;
};
#endif
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