/*
* Copyright (c) 2026 Jiri Svoboda
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - 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.
* - The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*/
/** @addtogroup libc
* @{
*/
/** @file Debug memory allocator.
*/
#ifndef _LIBC_PRIVATE_DMALLOC_H_
#define _LIBC_PRIVATE_DMALLOC_H_
#include <stdbool.h>
enum {
/** Size of padding at the beginning of a block. */
pad_begin = 16,
/** Size of padding at the end of a block */
pad_end = 16,
/** Pattern for freed memory. */
freed_pattern = 0xdd,
/** Padding pattern. */
pad_pattern = 0xee,
/** Uninitialized memory pattern. */
uninit_pattern = 0xaa
};
/** Debug allocator heap block metadata. */
typedef struct {
/** Link to list of all blocks. */
link_t lblocks;
/** Pointer to start of user data */
void *ptr;
/** @c true if block was freed by user */
bool freed;
/** Size of user data in bytes. */
size_t size;
} dblock_t;
#endif
/** @}
*/