pooled_alloc.h

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/*
Copyright (c) 2009 Genome Research Ltd.
Author: Rob Davies <rmd@sanger.ac.uk>

Redistribution and use in source and binary forms, with or without 
modification, are permitted provided that the following conditions are met:

   1. Redistributions of source code must retain the above copyright notice, 
this list of conditions and the following disclaimer.

   2. 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.

   3. Neither the names Genome Research Ltd and Wellcome Trust Sanger
Institute nor the names of its contributors may be used to endorse or promote
products derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY GENOME RESEARCH LTD AND CONTRIBUTORS "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 GENOME RESEARCH LTD OR CONTRIBUTORS BE LIABLE
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*/

#ifndef _POOLED_ALLOC_H_
#define _POOLED_ALLOC_H_

/*
 * Implements a pooled block allocator where all items are the same size,
 * but we need many of them.
 */
typedef struct {
    void   *pool;
    size_t  used;
} pool_t;

typedef struct {
    size_t dsize;
    size_t npools;
    pool_t *pools;
    void *free;
} pool_alloc_t;

pool_alloc_t *pool_create(size_t dsize);
void pool_destroy(pool_alloc_t *p);
void *pool_alloc(pool_alloc_t *p);
void pool_free(pool_alloc_t *p, void *ptr);


#endif /*_POOLED_ALLOC_H_*/