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/* ========================================================================= *
* *
* The Apache Software License, Version 1.1 *
* *
* Copyright (c) 1999-2001 The Apache Software Foundation. *
* All rights reserved. *
* *
* ========================================================================= *
* *
* Redistribution and use in source and binary forms, with or without modi- *
* fication, are permitted provided that the following conditions are met: *
* *
* 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 *
* notice, this list of conditions and the following disclaimer in the *
* documentation and/or other materials provided with the distribution. *
* *
* 3. The end-user documentation included with the redistribution, if any, *
* must include the following acknowlegement: *
* *
* "This product includes software developed by the Apache Software *
* Foundation <http://www.apache.org/>." *
* *
* Alternately, this acknowlegement may appear in the software itself, if *
* and wherever such third-party acknowlegements normally appear. *
* *
* 4. The names "The Jakarta Project", "Jk", and "Apache Software *
* Foundation" must not be used to endorse or promote products derived *
* from this software without prior written permission. For written *
* permission, please contact <apache@apache.org>. *
* *
* 5. Products derived from this software may not be called "Apache" nor may *
* "Apache" appear in their names without prior written permission of the *
* Apache Software Foundation. *
* *
* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESSED 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 APACHE SOFTWARE FOUNDATION OR ITS CONTRIBUTORS 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. *
* *
* ========================================================================= *
* *
* This software consists of voluntary contributions made by many indivi- *
* duals on behalf of the Apache Software Foundation. For more information *
* on the Apache Software Foundation, please see <http://www.apache.org/>. *
* *
* ========================================================================= */
/***************************************************************************
* Description: Simple memory pool *
* Author: Gal Shachor <shachor@il.ibm.com> *
* Version: $Revision: 1.5 $ *
***************************************************************************/
#include "jk_pool.h"
#define DEFAULT_DYNAMIC 10
static void *jk_pool_dyn_alloc(jk_pool_t *p,
size_t size);
void jk_open_pool(jk_pool_t *p,
jk_pool_atom_t *buf,
unsigned size)
{
p->pos = 0;
p->size = size;
p->buf = (char *)buf;
p->dyn_pos = 0;
p->dynamic = NULL;
p->dyn_size = 0;
}
void jk_close_pool(jk_pool_t *p)
{
if(p) {
jk_reset_pool(p);
if(p->dynamic) {
free(p->dynamic);
}
}
}
void jk_reset_pool(jk_pool_t *p)
{
if(p && p->dyn_pos && p->dynamic) {
unsigned i;
for(i = 0 ; i < p->dyn_pos ; i++) {
if(p->dynamic[i]) {
free(p->dynamic[i]);
}
}
}
p->dyn_pos = 0;
p->pos = 0;
}
void *jk_pool_alloc(jk_pool_t *p,
size_t size)
{
void *rc = NULL;
if(p && size > 0) {
/* Round size to the upper mult of 8 (or 16 on iSeries) */
size--;
#ifdef AS400
size /= 16;
size = (size + 1) * 16;
#else
size /= 8;
size = (size + 1) * 8;
#endif
if((p->size - p->pos) >= size) {
rc = &(p->buf[p->pos]);
p->pos += size;
} else {
rc = jk_pool_dyn_alloc(p, size);
}
}
return rc;
}
void *jk_pool_realloc(jk_pool_t *p,
size_t sz,
const void *old,
size_t old_sz)
{
void *rc;
if(!p || (!old && old_sz)) {
return NULL;
}
rc = jk_pool_alloc(p, sz);
if(rc) {
memcpy(rc, old, old_sz);
}
return rc;
}
void *jk_pool_strdup(jk_pool_t *p,
const char *s)
{
char *rc = NULL;
if(s && p) {
size_t size = strlen(s);
if(!size) {
return "";
}
size++;
rc = jk_pool_alloc(p, size);
if(rc) {
memcpy(rc, s, size);
}
}
return rc;
}
void jk_dump_pool(jk_pool_t *p,
FILE *f)
{
fprintf(f, "Dumping for pool [%x]\n", p);
fprintf(f, "size [%d]\n", p->size);
fprintf(f, "pos [%d]\n", p->pos);
fprintf(f, "buf [%x]\n", p->buf);
fprintf(f, "dyn_size [%d]\n", p->dyn_size);
fprintf(f, "dyn_pos [%d]\n", p->dyn_pos);
fprintf(f, "dynamic [%x]\n", p->dynamic);
fflush(f);
}
static void *jk_pool_dyn_alloc(jk_pool_t *p,
size_t size)
{
void *rc = NULL;
if(p->dyn_size == p->dyn_pos) {
unsigned new_dyn_size = p->dyn_size + DEFAULT_DYNAMIC;
void **new_dynamic = (void **)malloc(new_dyn_size * sizeof(void *));
if(new_dynamic) {
if(p->dynamic) {
memcpy(new_dynamic,
p->dynamic,
p->dyn_size * sizeof(void *));
free(p->dynamic);
}
p->dynamic = new_dynamic;
p->dyn_size = new_dyn_size;
} else {
return NULL;
}
}
rc = p->dynamic[p->dyn_pos] = malloc(size);
if(p->dynamic[p->dyn_pos]) {
p->dyn_pos ++;
}
return rc;
}
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