/usr/include/apr-1.0/apr_allocator.h is in libapr1-dev 1.5.1-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 | /* 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)));
#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 */
|