jk_pool.h

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/* ========================================================================= *
 *                                                                           *
 *                 The Apache Software License,  Version 1.1                 *
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 *          Copyright (c) 1999-2001 The Apache Software Foundation.          *
 *                           All rights reserved.                            *
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 * ========================================================================= *
 *                                                                           *
 * Redistribution and use in source and binary forms,  with or without modi- *
 * fication, are permitted provided that the following conditions are met:   *
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 * 1. Redistributions of source code  must retain the above copyright notice *
 *    notice, this list of conditions and the following disclaimer.          *
 *                                                                           *
 * 2. Redistributions  in binary  form  must  reproduce the  above copyright *
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 * 3. The end-user documentation  included with the redistribution,  if any, *
 *    must include the following acknowlegement:                             *
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 *       "This product includes  software developed  by the Apache  Software *
 *        Foundation <http://www.apache.org/>."                              *
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 * 4. The names  "The  Jakarta  Project",  "Jk",  and  "Apache  Software     *
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 *    permission, please contact <[e-mail]>.                        *
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 * POSSIBILITY OF SUCH DAMAGE.                                               *
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 * duals on behalf of the  Apache Software Foundation.  For more information *
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/***************************************************************************
 * Description: Memory Pool object header file                             *
 * Author:      Gal Shachor <[e-mail]>                           *
 * Version:     $Revision: 1.4 $                                           *
 ***************************************************************************/
#ifndef _JK_POOL_H
#define _JK_POOL_H

#include "jk_global.h"

#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */

/**
 * @file jk_pool.h
 * @brief Jk memory allocation
 *
 * Similar with apr_pools, but completely unsynchronized.
 * XXX use same names
 * 
 */

/*
 * The pool atom (basic pool alocation unit) is an 8 byte long. 
 * Each allocation (even for 1 byte) will return a round up to the 
 * number of atoms. 
 * 
 * This is to help in alignment of 32/64 bit machines ...
 * G.S
 */
#ifdef WIN32
    typedef __int64     jk_pool_atom_t;
#elif defined(AIX)
    typedef long long   jk_pool_atom_t;
#elif defined(SOLARIS)
    typedef long long   jk_pool_atom_t;
#elif defined(LINUX)
    typedef long long   jk_pool_atom_t;
#elif defined(FREEBSD)
    typedef long long   jk_pool_atom_t;
#elif defined(OS2)
    typedef long long   jk_pool_atom_t;
#elif defined(NETWARE)
    typedef long long   jk_pool_atom_t;
#elif defined(HPUX11)
    typedef long long   jk_pool_atom_t;
#elif defined(IRIX)
    typedef long long   jk_pool_atom_t;
#elif defined(AS400)
    typedef void *	jk_pool_atom_t;
#else
    typedef long long   jk_pool_atom_t;
#endif

/* 
 * Pool size in number of pool atoms.
 */
#define TINY_POOL_SIZE 256                  /* Tiny 1/4K atom pool. */
#define SMALL_POOL_SIZE 512                 /* Small 1/2K atom pool. */
#define BIG_POOL_SIZE   2*SMALL_POOL_SIZE   /* Bigger 1K atom pool. */
#define HUGE_POOL_SIZE  2*BIG_POOL_SIZE     /* Huge 2K atom pool. */

  /** XXX Move it to impl, make it incomplete 
   */
struct jk_pool {
    unsigned size;      
    unsigned pos;       
    char     *buf;      
    unsigned dyn_size;  
    unsigned dyn_pos;   
    void     **dynamic; 
};

typedef struct jk_pool jk_pool_t;

void jk_open_pool(jk_pool_t *p,
                  jk_pool_atom_t *buf,
                  unsigned size);

void jk_close_pool(jk_pool_t *p);

void jk_reset_pool(jk_pool_t *p);

void *jk_pool_alloc(jk_pool_t *p, 
                    size_t sz);

void *jk_pool_realloc(jk_pool_t *p, 
                      size_t sz,
                      const void *old,
                      size_t old_sz);

void *jk_pool_strdup(jk_pool_t *p, 
                     const char *s);

#ifdef __cplusplus
}
#endif /* __cplusplus */

#endif /* _JK_POOL_H */