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/*
* $Revision: 2523 $
*
* last checkin:
* $Author: gutwenger $
* $Date: 2012-07-02 20:59:27 +0200 (Mon, 02 Jul 2012) $
***************************************************************/
/** \file
* \brief Declaration of memory manager for allocating small
* pieces of memory
*
* \author Carsten Gutwenger
*
* \par License:
* This file is part of the Open Graph Drawing Framework (OGDF).
*
* \par
* Copyright (C)<br>
* See README.txt in the root directory of the OGDF installation for details.
*
* \par
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* Version 2 or 3 as published by the Free Software Foundation;
* see the file LICENSE.txt included in the packaging of this file
* for details.
*
* \par
* This program 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 General Public License for more details.
*
* \par
* You should have received a copy of the GNU General Public
* License along with this program; if not, write to the Free
* Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
* \see http://www.gnu.org/copyleft/gpl.html
***************************************************************/
#ifdef _MSC_VER
#pragma once
#endif
#ifndef OGDF_MEMORY_H
#define OGDF_MEMORY_H
#include <stdlib.h>
#include <new>
//---------------------------------------------------------------------
// configuration of memory-manager (can also be set by compiler flag)
//
// the good old pool allocator (not thread-safe)
//#define OGDF_MEMORY_POOL_NTS
//
// just using malloc/free (thread-safe)
#define OGDF_MEMORY_MALLOC_TS
//
// new buffered-pool allocator per thread pool (thread-safe)
//#define OGDF_MEMORY_POOL_TS
//
// default (nothing defined): depending on system / compiler
//---------------------------------------------------------------------
// By default, we use the non-thread safe variant on cygwin and g++ 3.x
// since thread-local storage is not working there, and a thread-safe
// pool allocator otherwise.
#if !defined(OGDF_MEMORY_POOL_NTS) && !defined(OGDF_MEMORY_MALLOC_TS) && !defined(OGDF_MEMORY_POOL_TS)
#define OGDF_MEMORY_POOL_TS
#endif
#include "../internal/basic/PoolMemoryAllocator.h"
#include "../internal/basic/MallocMemoryAllocator.h"
namespace ogdf {
#define OGDF_MM(Alloc) \
public: \
static void *operator new(size_t nBytes) { \
if(OGDF_LIKELY(Alloc::checkSize(nBytes))) \
return Alloc::allocate(nBytes); \
else \
return MallocMemoryAllocator::allocate(nBytes); \
} \
\
static void operator delete(void *p, size_t nBytes) { \
if(OGDF_LIKELY(p != 0)) { \
if(OGDF_LIKELY(Alloc::checkSize(nBytes))) \
Alloc::deallocate(nBytes, p); \
else \
MallocMemoryAllocator::deallocate(nBytes, p); \
} \
} \
static void *operator new(size_t, void *p) { return p; } \
static void operator delete(void *, void *) { }
#define OGDF_NEW new
#ifdef OGDF_MEMORY_MALLOC_TS
#define OGDF_ALLOCATOR ogdf::MallocMemoryAllocator
#else
#define OGDF_ALLOCATOR ogdf::PoolMemoryAllocator
#endif
//! Creates new and delete operators in a class using ogdf's memory allocator.
#define OGDF_NEW_DELETE OGDF_MM(OGDF_ALLOCATOR)
//! Creates new and delete operators in a class using the malloc memory allocator.
#define OGDF_MALLOC_NEW_DELETE OGDF_MM(MallocMemoryAllocator)
} // namespace ogdf
#endif
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