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Name	Size	Permission
apr-x86_64.h	17.89 KB	-rw-r--r--
apr.h	636 B	-rw-r--r--
apr_allocator.h	6.07 KB	-rw-r--r--
apr_anylock.h	4.93 KB	-rw-r--r--
apr_atomic.h	6.04 KB	-rw-r--r--
apr_base64.h	3.75 KB	-rw-r--r--
apr_buckets.h	63.15 KB	-rw-r--r--
apr_crypto.h	19.68 KB	-rw-r--r--
apr_cstr.h	11.13 KB	-rw-r--r--
apr_date.h	3.47 KB	-rw-r--r--
apr_dbd.h	23.35 KB	-rw-r--r--
apr_dbm.h	8.4 KB	-rw-r--r--
apr_dso.h	2.64 KB	-rw-r--r--
apr_encode.h	30.35 KB	-rw-r--r--
apr_env.h	2.06 KB	-rw-r--r--
apr_errno.h	53.77 KB	-rw-r--r--
apr_escape.h	17.23 KB	-rw-r--r--
apr_file_info.h	17.17 KB	-rw-r--r--
apr_file_io.h	42.88 KB	-rw-r--r--
apr_fnmatch.h	6.08 KB	-rw-r--r--
apr_general.h	7.34 KB	-rw-r--r--
apr_getopt.h	5.84 KB	-rw-r--r--
apr_global_mutex.h	7.19 KB	-rw-r--r--
apr_hash.h	10.08 KB	-rw-r--r--
apr_hooks.h	12.36 KB	-rw-r--r--
apr_inherit.h	2.09 KB	-rw-r--r--
apr_ldap.h	5.57 KB	-rw-r--r--
apr_ldap_init.h	5.64 KB	-rw-r--r--
apr_ldap_option.h	8.4 KB	-rw-r--r--
apr_ldap_rebind.h	3.09 KB	-rw-r--r--
apr_ldap_url.h	3.71 KB	-rw-r--r--
apr_lib.h	8.23 KB	-rw-r--r--
apr_md4.h	4.42 KB	-rw-r--r--
apr_md5.h	6.2 KB	-rw-r--r--
apr_memcache.h	16.82 KB	-rw-r--r--
apr_mmap.h	5.01 KB	-rw-r--r--
apr_network_io.h	36.02 KB	-rw-r--r--
apr_optional.h	2.71 KB	-rw-r--r--
apr_optional_hooks.h	3.78 KB	-rw-r--r--
apr_perms_set.h	1.86 KB	-rw-r--r--
apr_poll.h	20.6 KB	-rw-r--r--
apr_pools.h	30.94 KB	-rw-r--r--
apr_portable.h	20.02 KB	-rw-r--r--
apr_proc_mutex.h	6.85 KB	-rw-r--r--
apr_queue.h	3.98 KB	-rw-r--r--
apr_random.h	4.92 KB	-rw-r--r--
apr_redis.h	15.62 KB	-rw-r--r--
apr_reslist.h	7.01 KB	-rw-r--r--
apr_ring.h	18.78 KB	-rw-r--r--
apr_rmm.h	4.67 KB	-rw-r--r--
apr_sdbm.h	5.97 KB	-rw-r--r--
apr_sha1.h	3.79 KB	-rw-r--r--
apr_shm.h	9.26 KB	-rw-r--r--
apr_signal.h	2.7 KB	-rw-r--r--
apr_siphash.h	6.01 KB	-rw-r--r--
apr_skiplist.h	14.19 KB	-rw-r--r--
apr_strings.h	14.55 KB	-rw-r--r--
apr_strmatch.h	2.61 KB	-rw-r--r--
apr_support.h	1.6 KB	-rw-r--r--
apr_tables.h	18.9 KB	-rw-r--r--
apr_thread_cond.h	5.4 KB	-rw-r--r--
apr_thread_mutex.h	4.39 KB	-rw-r--r--
apr_thread_pool.h	10.84 KB	-rw-r--r--
apr_thread_proc.h	36.8 KB	-rw-r--r--
apr_thread_rwlock.h	4.65 KB	-rw-r--r--
apr_time.h	7.39 KB	-rw-r--r--
apr_uri.h	6.43 KB	-rw-r--r--
apr_user.h	5.19 KB	-rw-r--r--
apr_uuid.h	2.05 KB	-rw-r--r--
apr_version.h	5.22 KB	-rw-r--r--
apr_want.h	2.89 KB	-rw-r--r--
apr_xlate.h	6.26 KB	-rw-r--r--
apr_xml.h	12.19 KB	-rw-r--r--
apu.h	4.22 KB	-rw-r--r--
apu_errno.h	5.32 KB	-rw-r--r--
apu_version.h	4.2 KB	-rw-r--r--
apu_want.h	1.45 KB	-rw-r--r--

Code Editor : apr_allocator.h

/* 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

/**
 * @file apr_allocator.h
 * @brief APR Internal Memory Allocation
 */

#include "apr.h"
#include "apr_errno.h"
#define APR_WANT_MEMFUNC /**< For no good reason? */
#include "apr_want.h"

#ifdef __cplusplus
extern "C" {
#endif

/**
 * @defgroup apr_allocator Internal Memory Allocation
 * @ingroup APR 
 * @{
 */

/** the allocator structure */
typedef struct apr_allocator_t apr_allocator_t;
/** the structure which holds information about the allocation */
typedef struct apr_memnode_t apr_memnode_t;

/** basic memory node structure
 * @note The next, ref and first_avail fields are available for use by the
 *       caller of apr_allocator_alloc(), the remaining fields are read-only.
 *       The next field has to be used with caution and sensibly set when the
 *       memnode is passed back to apr_allocator_free().  See apr_allocator_free()
 *       for details.  
 *       The ref and first_avail fields will be properly restored by
 *       apr_allocator_free().
 */
struct apr_memnode_t {
    apr_memnode_t *next;            /**< next memnode */
    apr_memnode_t **ref;            /**< reference to self */
    apr_uint32_t   index;           /**< size */
    apr_uint32_t   free_index;      /**< how much free */
    char          *first_avail;     /**< pointer to first free memory */
    char          *endp;            /**< pointer to end of free memory */
};

/** The base size of a memory node - aligned.  */
#define APR_MEMNODE_T_SIZE APR_ALIGN_DEFAULT(sizeof(apr_memnode_t))

/** Symbolic constants */
#define APR_ALLOCATOR_MAX_FREE_UNLIMITED 0

/**
 * Create a new allocator
 * @param allocator The allocator we have just created.
 *
 */
APR_DECLARE(apr_status_t) apr_allocator_create(apr_allocator_t **allocator)
                          __attribute__((nonnull(1)));

/**
 * Destroy an allocator
 * @param allocator The allocator to be destroyed
 * @remark Any memnodes not given back to the allocator prior to destroying
 *         will _not_ be free()d.
 */
APR_DECLARE(void) apr_allocator_destroy(apr_allocator_t *allocator)
                  __attribute__((nonnull(1)));

/**
 * Allocate a block of mem from the allocator
 * @param allocator The allocator to allocate from
 * @param size The size of the mem to allocate (excluding the
 *        memnode structure)
 */
APR_DECLARE(apr_memnode_t *) apr_allocator_alloc(apr_allocator_t *allocator,
                                                 apr_size_t size)
                             __attribute__((nonnull(1)));

/**
 * Free a list of blocks of mem, giving them back to the allocator.
 * The list is typically terminated by a memnode with its next field
 * set to NULL.
 * @param allocator The allocator to give the mem back to
 * @param memnode The memory node to return
 */
APR_DECLARE(void) apr_allocator_free(apr_allocator_t *allocator,
                                     apr_memnode_t *memnode)
                  __attribute__((nonnull(1,2)));
 
/**
 * Get the true size that would be allocated for the given size (including
 * the header and alignment).
 * @param allocator The allocator from which to the memory would be allocated
 * @param size The size to align
 * @return The aligned size (or zero on apr_size_t overflow)
 */
APR_DECLARE(apr_size_t) apr_allocator_align(apr_allocator_t *allocator,
                                            apr_size_t size);

#include "apr_pools.h"

/**
 * Set the owner of the allocator
 * @param allocator The allocator to set the owner for
 * @param pool The pool that is to own the allocator
 * @remark Typically pool is the highest level pool using the allocator
 */
/*
 * 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)
                  __attribute__((nonnull(1)));

/**
 * Get the current owner of the allocator
 * @param allocator The allocator to get the owner from
 */
APR_DECLARE(apr_pool_t *) apr_allocator_owner_get(apr_allocator_t *allocator)
                          __attribute__((nonnull(1)));

/**
 * Set the current threshold at which the allocator should start
 * giving blocks back to the system.
 * @param allocator The allocator to set the threshold on
 * @param size The threshold.  0 == unlimited.
 */
APR_DECLARE(void) apr_allocator_max_free_set(apr_allocator_t *allocator,
                                             apr_size_t size)
                  __attribute__((nonnull(1)));

#include "apr_thread_mutex.h"

#if APR_HAS_THREADS
/**
 * Set a mutex for the allocator to use
 * @param allocator The allocator to set the mutex for
 * @param mutex The mutex
 */
APR_DECLARE(void) apr_allocator_mutex_set(apr_allocator_t *allocator,
                                          apr_thread_mutex_t *mutex)
                  __attribute__((nonnull(1)));

/**
 * Get the mutex currently set for the allocator
 * @param allocator The allocator
 */
APR_DECLARE(apr_thread_mutex_t *) apr_allocator_mutex_get(
                                          apr_allocator_t *allocator)
                                  __attribute__((nonnull(1)));

#endif /* APR_HAS_THREADS */

/** @} */

#ifdef __cplusplus
}
#endif

#endif /* !APR_ALLOCATOR_H */

${this.title}

Code Editor : apr_allocator.h