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133 lines
4.5 KiB
C
133 lines
4.5 KiB
C
/*
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** Two Level Segregated Fit memory allocator, version 3.1.
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** Written by Matthew Conte
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** http://tlsf.baisoku.org
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**
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** Based on the original documentation by Miguel Masmano:
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** http://www.gii.upv.es/tlsf/main/docs
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**
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** This implementation was written to the specification
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** of the document, therefore no GPL restrictions apply.
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**
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** Copyright (c) 2006-2016, Matthew Conte
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** All rights reserved.
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**
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** Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions are met:
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** * Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** * Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in the
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** documentation and/or other materials provided with the distribution.
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** * Neither the name of the copyright holder nor the
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** names of its contributors may be used to endorse or promote products
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** derived from this software without specific prior written permission.
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**
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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** ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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** WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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** DISCLAIMED. IN NO EVENT SHALL MATTHEW CONTE BE LIABLE FOR ANY
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** DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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** (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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** LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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** ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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** SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include <assert.h>
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#include <limits.h>
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#include <stddef.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stddef.h>
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#include "heap_tlsf_config.h"
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#if defined(__cplusplus)
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extern "C" {
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#endif
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/*
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** Cast and min/max macros.
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*/
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#define tlsf_cast(t, exp) ((t) (exp))
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#define tlsf_min(a, b) ((a) < (b) ? (a) : (b))
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#define tlsf_max(a, b) ((a) > (b) ? (a) : (b))
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/* A type used for casting when doing pointer arithmetic. */
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typedef ptrdiff_t tlsfptr_t;
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typedef struct block_header_t
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{
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/* Points to the previous physical block. */
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struct block_header_t* prev_phys_block;
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/* The size of this block, excluding the block header. */
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size_t size;
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/* Next and previous free blocks. */
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struct block_header_t* next_free;
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struct block_header_t* prev_free;
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} block_header_t;
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/* The TLSF control structure. */
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typedef struct control_t
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{
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/* Empty lists point at this block to indicate they are free. */
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block_header_t block_null;
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/* Bitmaps for free lists. */
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unsigned int fl_bitmap;
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unsigned int sl_bitmap[FL_INDEX_COUNT];
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/* Head of free lists. */
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block_header_t* blocks[FL_INDEX_COUNT][SL_INDEX_COUNT];
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} control_t;
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#include "heap_tlsf_block_functions.h"
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/* tlsf_t: a TLSF structure. Can contain 1 to N pools. */
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/* pool_t: a block of memory that TLSF can manage. */
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typedef void* tlsf_t;
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typedef void* pool_t;
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/* Create/destroy a memory pool. */
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tlsf_t tlsf_create(void* mem);
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tlsf_t tlsf_create_with_pool(void* mem, size_t bytes);
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pool_t tlsf_get_pool(tlsf_t tlsf);
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/* Add/remove memory pools. */
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pool_t tlsf_add_pool(tlsf_t tlsf, void* mem, size_t bytes);
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void tlsf_remove_pool(tlsf_t tlsf, pool_t pool);
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/* malloc/memalign/realloc/free replacements. */
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void* tlsf_malloc(tlsf_t tlsf, size_t size);
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void* tlsf_memalign(tlsf_t tlsf, size_t align, size_t size);
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void* tlsf_memalign_offs(tlsf_t tlsf, size_t align, size_t size, size_t offset);
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void* tlsf_realloc(tlsf_t tlsf, void* ptr, size_t size);
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void tlsf_free(tlsf_t tlsf, void* ptr);
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/* Returns internal block size, not original request size */
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size_t tlsf_block_size(void* ptr);
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/* Overheads/limits of internal structures. */
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size_t tlsf_size(void);
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size_t tlsf_align_size(void);
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size_t tlsf_block_size_min(void);
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size_t tlsf_block_size_max(void);
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size_t tlsf_pool_overhead(void);
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size_t tlsf_alloc_overhead(void);
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/* Debugging. */
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typedef void (*tlsf_walker)(void* ptr, size_t size, int used, void* user);
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void tlsf_walk_pool(pool_t pool, tlsf_walker walker, void* user);
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/* Returns nonzero if any internal consistency check fails. */
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int tlsf_check(tlsf_t tlsf);
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int tlsf_check_pool(pool_t pool);
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#if defined(__cplusplus)
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};
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#endif
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