apr_allocator.h

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/* Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef APR_ALLOCATOR_H
#define APR_ALLOCATOR_H

#include "apr.h"
#include "apr_errno.h"
#define APR_WANT_MEMFUNC 
#include "apr_want.h"

#ifdef __cplusplus
extern "C" {
#endif

typedef struct apr_allocator_t apr_allocator_t;
typedef struct apr_memnode_t apr_memnode_t;

struct apr_memnode_t {
    apr_memnode_t *next;            
    apr_memnode_t **ref;            
    apr_uint32_t   index;           
    apr_uint32_t   free_index;      
    char          *first_avail;     
    char          *endp;            
};

#define APR_MEMNODE_T_SIZE APR_ALIGN_DEFAULT(sizeof(apr_memnode_t))

#define APR_ALLOCATOR_MAX_FREE_UNLIMITED 0

APR_DECLARE(apr_status_t) apr_allocator_create(apr_allocator_t **allocator);

APR_DECLARE(void) apr_allocator_destroy(apr_allocator_t *allocator);

APR_DECLARE(apr_memnode_t *) apr_allocator_alloc(apr_allocator_t *allocator,
                                                 apr_size_t size);

APR_DECLARE(void) apr_allocator_free(apr_allocator_t *allocator,
                                     apr_memnode_t *memnode);

#include "apr_pools.h"

/*
 * XXX: see if we can come up with something a bit better.  Currently
 * you can make a pool an owner, but if the pool doesn't use the allocator
 * the allocator will never be destroyed.
 */
APR_DECLARE(void) apr_allocator_owner_set(apr_allocator_t *allocator,
                                          apr_pool_t *pool);

APR_DECLARE(void) apr_allocator_set_owner(apr_allocator_t *allocator,
                                          apr_pool_t *pool);

APR_DECLARE(apr_pool_t *) apr_allocator_owner_get(apr_allocator_t *allocator);

APR_DECLARE(apr_pool_t *) apr_allocator_get_owner(
                                  apr_allocator_t *allocator);

APR_DECLARE(void) apr_allocator_max_free_set(apr_allocator_t *allocator,
                                             apr_size_t size);

APR_DECLARE(void) apr_allocator_set_max_free(apr_allocator_t *allocator,
                                             apr_size_t size);

#include "apr_thread_mutex.h"

#if APR_HAS_THREADS

APR_DECLARE(void) apr_allocator_mutex_set(apr_allocator_t *allocator,
                                          apr_thread_mutex_t *mutex);

APR_DECLARE(void) apr_allocator_set_mutex(apr_allocator_t *allocator,
                                          apr_thread_mutex_t *mutex);

APR_DECLARE(apr_thread_mutex_t *) apr_allocator_mutex_get(
                                      apr_allocator_t *allocator);

APR_DECLARE(apr_thread_mutex_t *) apr_allocator_get_mutex(
                                      apr_allocator_t *allocator);

#endif /* APR_HAS_THREADS */

#ifdef __cplusplus
}
#endif

#endif /* !APR_ALLOCATOR_H */

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