96 lines
3.2 KiB
C
Executable File
96 lines
3.2 KiB
C
Executable File
/*
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* Copyright (c) 2010, Andrea Mazzoleni. 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
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* are met:
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*
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* 1. 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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*
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* 2. 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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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/** \file
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* Allocator of fixed size blocks.
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*/
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#ifndef __TOMMYALLOC_H
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#define __TOMMYALLOC_H
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#include "tommytypes.h"
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/******************************************************************************/
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/* allocator */
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/** \internal
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* Allocator entry.
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*/
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struct tommy_allocator_entry_struct {
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struct tommy_allocator_entry_struct* next; /**< Pointer to the next entry. 0 for last. */
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};
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typedef struct tommy_allocator_entry_struct tommy_allocator_entry;
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/**
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* Allocator of fixed size blocks.
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*/
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typedef struct tommy_allocator_struct {
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struct tommy_allocator_entry_struct* free_block; /**< List of free blocks. */
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struct tommy_allocator_entry_struct* used_segment; /**< List of allocated segments. */
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tommy_size_t block_size; /**< Block size. */
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tommy_size_t align_size; /**< Alignment size. */
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tommy_count_t count; /**< Number of allocated elements. */
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} tommy_allocator;
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/**
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* Initializes the allocator.
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* \param alloc Allocator to initialize.
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* \param block_size Size of the block to allocate.
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* \param align_size Minimum alignment requirement. No less than sizeof(void*).
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*/
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void tommy_allocator_init(tommy_allocator* alloc, tommy_size_t block_size, tommy_size_t align_size);
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/**
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* Deinitialize the allocator.
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* It also releases all the allocated memory to the heap.
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* \param alloc Allocator to deinitialize.
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*/
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void tommy_allocator_done(tommy_allocator* alloc);
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/**
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* Allocates a block.
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* \param alloc Allocator to use.
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*/
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void* tommy_allocator_alloc(tommy_allocator* alloc);
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/**
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* Deallocates a block.
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* You must use the same allocator used in the tommy_allocator_alloc() call.
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* \param alloc Allocator to use.
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* \param ptr Block to free.
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*/
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void tommy_allocator_free(tommy_allocator* alloc, void* ptr);
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/**
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* Gets the size of allocated memory.
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* \param alloc Allocator to use.
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*/
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tommy_size_t tommy_allocator_memory_usage(tommy_allocator* alloc);
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#endif
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