/**
 * \file memory_buffer_alloc.h
 *
 * \brief Buffer-based memory allocator
 *
 *  Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  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.
 *
 *  This file is part of mbed TLS (https://tls.mbed.org)
 */
#ifndef MEMORY_BUFFER_ALLOC_H
#define MEMORY_BUFFER_ALLOC_H

#include <stddef.h>
/**
 * \name SECTION: Module settings
 *
 * The configuration options you can set for this module are in this section.
 * Either change them in config.h or define them on the compiler command line.
 * \{
 */

#define MBEDTLS_MEMORY_ALIGN_MULTIPLE       4 /**< Align on multiples of this value */

/* \} name SECTION: Module settings */

#define MBEDTLS_MEMORY_VERIFY_NONE         0
#define MBEDTLS_MEMORY_VERIFY_ALLOC        (1 << 0)
#define MBEDTLS_MEMORY_VERIFY_FREE         (1 << 1)
#define MBEDTLS_MEMORY_VERIFY_ALWAYS       (MBEDTLS_MEMORY_VERIFY_ALLOC | MBEDTLS_MEMORY_VERIFY_FREE)

#ifdef __cplusplus
extern "C" {
#endif

/**
 * \brief   Initialize use of stack-based memory allocator.
 *          The stack-based allocator does memory management inside the
 *          presented buffer and does not call calloc() and free().
 *          It sets the global mbedtls_calloc() and mbedtls_free() pointers
 *          to its own functions.
 *          (Provided mbedtls_calloc() and mbedtls_free() are thread-safe if
 *           MBEDTLS_THREADING_C is defined)
 *
 * \note    This code is not optimized and provides a straight-forward
 *          implementation of a stack-based memory allocator.
 *
 * \param buf   buffer to use as heap
 * \param len   size of the buffer
 */
void memory_buffer_alloc_init( unsigned char *buf, size_t len );

/**
 * \brief   Free the mutex for thread-safety and clear remaining memory
 */
void memory_buffer_alloc_free( void );

void *buffer_alloc_malloc(size_t size);

void buffer_alloc_free( void *ptr );

#ifdef __cplusplus
}
#endif

#endif /* memory_buffer_alloc.h */