/* * Copyright (c) 2005, Swedish Institute of Computer Science * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the Institute nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * This file is part of the Contiki operating system. * * @(#)$Id: mmem.h,v 1.2 2008/10/15 14:17:28 nvt-se Exp $ */ /** * \addtogroup mem * @{ */ /** * \defgroup mmem Managed memory allocator * * The managed memory allocator is a fragmentation-free memory * manager. It keeps the allocated memory free from fragmentation by * compacting the memory when blocks are freed. A program that uses * the managed memory module cannot be sure that allocated memory * stays in place. Therefore, a level of indirection is used: access * to allocated memory must always be done using a special macro. * * \note This module has not been heavily tested. * @{ */ /** * \file * Header file for the managed memory allocator * \author * Adam Dunkels <adam@sics.se> * */ #ifndef __MMEM_H__ #define __MMEM_H__ /*---------------------------------------------------------------------------*/ /** * \brief Get a pointer to the managed memory * \param m A pointer to the struct mmem * \return A pointer to the memory block, or NULL if memory could * not be allocated. * \author Adam Dunkels * * This macro is used to get a pointer to a memory block * allocated with mmem_alloc(). * * \hideinitializer */ #define MMEM_PTR(m) (struct mmem *)(m)->ptr struct mmem { struct mmem *next; unsigned int size; void *ptr; }; /* XXX: tagga minne med "interrupt usage", vilke g�r att man �r speciellt varsam under free(). */ int mmem_alloc(struct mmem *m, unsigned int size); void mmem_free(struct mmem *); void mmem_init(void); #endif /* __MMEM_H__ */ /** @} */ /** @} */