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Name	Size	Permission
ap_compat.h	1.05 KB	-rw-r--r--
ap_config.h	6.45 KB	-rw-r--r--
ap_config_auto.h	11.76 KB	-rw-r--r--
ap_config_layout.h	2.67 KB	-rw-r--r--
ap_expr.h	13.75 KB	-rw-r--r--
ap_hooks.h	5.85 KB	-rw-r--r--
ap_listen.h	5.69 KB	-rw-r--r--
ap_mmn.h	38.51 KB	-rw-r--r--
ap_mpm.h	10.4 KB	-rw-r--r--
ap_provider.h	3.45 KB	-rw-r--r--
ap_regex.h	11.14 KB	-rw-r--r--
ap_regkey.h	8.97 KB	-rw-r--r--
ap_release.h	3.07 KB	-rw-r--r--
ap_slotmem.h	7.07 KB	-rw-r--r--
ap_socache.h	9.17 KB	-rw-r--r--
apache_noprobes.h	15.59 KB	-rw-r--r--
apr.h	17.1 KB	-rw-r--r--
apr_allocator.h	6.07 KB	-rw-r--r--
apr_anylock.h	4.93 KB	-rw-r--r--
apr_atomic.h	4.04 KB	-rw-r--r--
apr_base64.h	3.75 KB	-rw-r--r--
apr_buckets.h	63.04 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_env.h	2.06 KB	-rw-r--r--
apr_errno.h	53.77 KB	-rw-r--r--
apr_escape.h	16.82 KB	-rw-r--r--
apr_file_info.h	17.17 KB	-rw-r--r--
apr_file_io.h	42.13 KB	-rw-r--r--
apr_fnmatch.h	6.08 KB	-rw-r--r--
apr_general.h	7.12 KB	-rw-r--r--
apr_getopt.h	5.84 KB	-rw-r--r--
apr_global_mutex.h	6.54 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	5.54 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	34.8 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	6.2 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	18.57 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	3.75 KB	-rw-r--r--
apr_thread_pool.h	10.84 KB	-rw-r--r--
apr_thread_proc.h	34.79 KB	-rw-r--r--
apr_thread_rwlock.h	4.65 KB	-rw-r--r--
apr_time.h	7.33 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	5.28 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--
cache_common.h	1.97 KB	-rw-r--r--
heartbeat.h	1.56 KB	-rw-r--r--
http_config.h	56.37 KB	-rw-r--r--
http_connection.h	6.97 KB	-rw-r--r--
http_core.h	35.09 KB	-rw-r--r--
http_log.h	36.01 KB	-rw-r--r--
http_main.h	3.17 KB	-rw-r--r--
http_protocol.h	40.97 KB	-rw-r--r--
http_request.h	25.72 KB	-rw-r--r--
http_ssl.h	14.62 KB	-rw-r--r--
http_vhost.h	4.49 KB	-rw-r--r--
httpd.h	92.09 KB	-rw-r--r--
mod_auth.h	4.42 KB	-rw-r--r--
mod_cache.h	7.09 KB	-rw-r--r--
mod_cgi.h	2.44 KB	-rw-r--r--
mod_core.h	3.33 KB	-rw-r--r--
mod_dav.h	97.62 KB	-rw-r--r--
mod_dbd.h	4.06 KB	-rw-r--r--
mod_http2.h	3.62 KB	-rw-r--r--
mod_include.h	3.89 KB	-rw-r--r--
mod_log_config.h	2.43 KB	-rw-r--r--
mod_proxy.h	63.51 KB	-rw-r--r--
mod_request.h	1.59 KB	-rw-r--r--
mod_rewrite.h	1.36 KB	-rw-r--r--
mod_session.h	6.61 KB	-rw-r--r--
mod_so.h	1.2 KB	-rw-r--r--
mod_ssl.h	4.87 KB	-rw-r--r--
mod_ssl_openssl.h	4.67 KB	-rw-r--r--
mod_status.h	2.38 KB	-rw-r--r--
mod_unixd.h	1.09 KB	-rw-r--r--
mod_watchdog.h	7.34 KB	-rw-r--r--
mod_xml2enc.h	2.25 KB	-rw-r--r--
mpm_common.h	16.92 KB	-rw-r--r--
os.h	1.63 KB	-rw-r--r--
scoreboard.h	9.73 KB	-rw-r--r--
unixd.h	4.14 KB	-rw-r--r--
util_cfgtree.h	3.08 KB	-rw-r--r--
util_charset.h	2.21 KB	-rw-r--r--
util_cookies.h	4.84 KB	-rw-r--r--
util_ebcdic.h	2.69 KB	-rw-r--r--
util_fcgi.h	9.75 KB	-rw-r--r--
util_filter.h	25.84 KB	-rw-r--r--
util_ldap.h	17.97 KB	-rw-r--r--
util_md5.h	2.12 KB	-rw-r--r--
util_mutex.h	9.07 KB	-rw-r--r--
util_script.h	9.57 KB	-rw-r--r--
util_time.h	3.99 KB	-rw-r--r--
util_varbuf.h	8.09 KB	-rw-r--r--
util_xml.h	1.31 KB	-rw-r--r--

Code Editor : ap_socache.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.
 */

/**
 * @file ap_socache.h
 * @brief Small object cache provider interface.
 *
 * @defgroup AP_SOCACHE ap_socache
 * @ingroup  APACHE_MODS
 * @{
 */

#ifndef AP_SOCACHE_H
#define AP_SOCACHE_H

#include "httpd.h"
#include "ap_provider.h"
#include "apr_pools.h"
#include "apr_time.h"

#ifdef __cplusplus
extern "C" {
#endif

/** If this flag is set, the store/retrieve/remove/status interfaces
 * of the provider are NOT safe to be called concurrently from
 * multiple processes or threads, and an external global mutex must be
 * used to serialize access to the provider.
 */
/* XXX: Even if store/retrieve/remove is atomic, isn't it useful to note
 * independently that status and iterate may or may not be?
 */
#define AP_SOCACHE_FLAG_NOTMPSAFE (0x0001)

/** A cache instance. */
typedef struct ap_socache_instance_t ap_socache_instance_t;

/** Hints which may be passed to the init function; providers may
 * ignore some or all of these hints. */
struct ap_socache_hints {
    /** Approximate average length of IDs: */
    apr_size_t avg_id_len;
    /** Approximate average size of objects: */
    apr_size_t avg_obj_size;
    /** Suggested interval between expiry cleanup runs; */
    apr_interval_time_t expiry_interval;
};

/**
 * Iterator callback prototype for the ap_socache_provider_t->iterate() method
 * @param instance The cache instance
 * @param s Associated server context (for logging)
 * @param userctx User defined pointer passed from the iterator call
 * @param id Unique ID for the object (binary blob)
 * with a trailing null char for convenience
 * @param idlen Length of id blob
 * @param data Output buffer to place retrieved data (binary blob)
 * with a trailing null char for convenience
 * @param datalen Length of data buffer
 * @param pool Pool for temporary allocations
 * @return APR status value; return APR_SUCCESS or the iteration will halt;
 * this value is returned to the ap_socache_provider_t->iterate() caller
 */
typedef apr_status_t (ap_socache_iterator_t)(ap_socache_instance_t *instance,
                                             server_rec *s,
                                             void *userctx,
                                             const unsigned char *id,
                                             unsigned int idlen,
                                             const unsigned char *data,
                                             unsigned int datalen,
                                             apr_pool_t *pool);

/** A socache provider structure.  socache providers are registered
 * with the ap_provider.h interface using the AP_SOCACHE_PROVIDER_*
 * constants. */
typedef struct ap_socache_provider_t {
    /** Canonical provider name. */
    const char *name;

/** Bitmask of AP_SOCACHE_FLAG_* flags. */
    unsigned int flags;

/**
     * Create a session cache based on the given configuration string.
     * The instance pointer returned in the instance parameter will be
     * passed as the first argument to subsequent invocations.
     *
     * @param instance Output parameter to which instance object is written.
     * @param arg User-specified configuration string.  May be NULL to
     *        force use of defaults.
     * @param tmp Pool to be used for any temporary allocations
     * @param p Pool to be use for any allocations lasting as long as
     * the created instance
     * @return NULL on success, or an error string on failure.
     */
    const char *(*create)(ap_socache_instance_t **instance, const char *arg,
                          apr_pool_t *tmp, apr_pool_t *p);

/**
     * Initialize the cache.  The cname must be of maximum length 16
     * characters, and uniquely identifies the consumer of the cache
     * within the server; using the module name is recommended, e.g.
     * "mod_ssl-sess".  This string may be used within a filesystem
     * path so use of only alphanumeric [a-z0-9_-] characters is
     * recommended.  If hints is non-NULL, it gives a set of hints for
     * the provider.  Returns APR error code.
     *
     * @param instance The cache instance
     * @param cname A unique string identifying the consumer of this API
     * @param hints Optional hints argument describing expected cache use
     * @param s Server structure to which the cache is associated
     * @param pool Pool for long-lived allocations
     * @return APR status value indicating success.
     */
    apr_status_t (*init)(ap_socache_instance_t *instance, const char *cname,
                         const struct ap_socache_hints *hints,
                         server_rec *s, apr_pool_t *pool);

/**
     * Destroy a given cache instance object.
     * @param instance The cache instance to destroy.
     * @param s Associated server structure (for logging purposes)
     */
    void (*destroy)(ap_socache_instance_t *instance, server_rec *s);

/**
     * Store an object in a cache instance.
     * @param instance The cache instance
     * @param s Associated server structure (for logging purposes)
     * @param id Unique ID for the object; binary blob
     * @param idlen Length of id blob
     * @param expiry Absolute time at which the object expires
     * @param data Data to store; binary blob
     * @param datalen Length of data blob
     * @param pool Pool for temporary allocations.
     * @return APR status value.
     */
    apr_status_t (*store)(ap_socache_instance_t *instance, server_rec *s,
                          const unsigned char *id, unsigned int idlen,
                          apr_time_t expiry,
                          unsigned char *data, unsigned int datalen,
                          apr_pool_t *pool);

/**
     * Retrieve a cached object.
     * 
     * @param instance The cache instance
     * @param s Associated server structure (for logging purposes)
     * @param id Unique ID for the object; binary blob
     * @param idlen Length of id blob
     * @param data Output buffer to place retrievd data (binary blob)
     * @param datalen On entry, length of data buffer; on exit, the
     * number of bytes written to the data buffer.
     * @param pool Pool for temporary allocations.
     * @return APR status value; APR_NOTFOUND if the object was not
     * found
     */
    apr_status_t (*retrieve)(ap_socache_instance_t *instance, server_rec *s,
                             const unsigned char *id, unsigned int idlen,
                             unsigned char *data, unsigned int *datalen,
                             apr_pool_t *pool);

/**
     * Remove an object from the cache
     *
     * @param instance The cache instance
     * @param s Associated server structure (for logging purposes)
     * @param id Unique ID for the object; binary blob
     * @param idlen Length of id blob
     * @param pool Pool for temporary allocations.
     */
    apr_status_t (*remove)(ap_socache_instance_t *instance, server_rec *s,
                           const unsigned char *id, unsigned int idlen,
                           apr_pool_t *pool);

/** 
     * Dump the status of a cache instance for mod_status.  Will use
     * the ap_r* interfaces to produce appropriate status output.
     * XXX: ap_r* are deprecated, bad dogfood
     *
     * @param instance The cache instance
     * @param r The request structure
     * @param flags The AP_STATUS_* constants used (see mod_status.h)
     */
    void (*status)(ap_socache_instance_t *instance, request_rec *r, int flags);

/**
     * Dump all cached objects through an iterator callback.
     * @param instance The cache instance
     * @param s Associated server context (for processing and logging)
     * @param userctx User defined pointer passed through to the iterator
     * @param iterator The user provided callback function which will receive
     * individual calls for each unexpired id/data pair
     * @param pool Pool for temporary allocations.
     * @return APR status value; APR_NOTFOUND if the object was not
     * found
     */
    apr_status_t (*iterate)(ap_socache_instance_t *instance, server_rec *s,
                            void *userctx, ap_socache_iterator_t *iterator,
                            apr_pool_t *pool);

} ap_socache_provider_t;

/** The provider group used to register socache providers. */
#define AP_SOCACHE_PROVIDER_GROUP "socache"
/** The provider version used to register socache providers. */
#define AP_SOCACHE_PROVIDER_VERSION "0"

/** Default provider name. */
#define AP_SOCACHE_DEFAULT_PROVIDER "default"

#ifdef __cplusplus
}
#endif

#endif /* AP_SOCACHE_H */
/** @} */

${this.title}

Code Editor : ap_socache.h