/*
 *   Copyright 2011 Institute of Communication and Computer Systems (ICCS) 
 *
 *   Licensed 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
 *
 *   Unless required by applicable law or agreed to in writing, software
 *   distributed under the License is distributed on an "AS IS" BASIS,
 *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *   See the License for the specific language governing permissions and
 *   limitations under the License.
 *
 */

/**
 * \file 	single_allocator.h
 * \author 	Ioannis Koutras (joko@microlab.ntua.gr)
 * \date 	September, 2011
 * 	Basic structures needed for the dmmlib allocator.
 */

#ifndef SINGLE_ALLOCATOR_H
#define SINGLE_ALLOCATOR_H

#include <dmmlib/heap.h>

/* In case stdlib.h is used, there is no need to redeclare
 * malloc() and free()
 */
#ifndef __malloc_and_calloc_defined
/**
 * Allocates size bytes by using the system's allocator.
 * \param   size    Requested allocation size in bytes.
 */
void * malloc(size_t size);

/**
 * De-allocates the memory space pointed to by ptr.
 * \param   ptr     The pointer to memory to free.
 */
void free(void *ptr);

/**
 * Try to change the size of an allocation
 * \param   ptr	    The pointer to the data part of the original memory block.
 * \param   size    The new desired size of the block.
 *
 * \return  The pointer to the data part of the memory block which
 * has the new, desired size.
 */
void * realloc(void *ptr, size_t size);

#endif /* __malloc_and_calloc_defined */

/** Global variable storing allocator's settings */
allocator_t systemallocator;

#endif /* SINGLE_ALLOCATOR_H */