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Name	Size	Permission	Date
ap_compat.h	1.08 KB	-rw-rw-rw-	2006-07-12 00:33
ap_config.h	6.65 KB	-rw-rw-rw-	2012-08-15 03:59
ap_config_layout.h	1.21 KB	-rw-rw-rw-	2022-01-02 15:34
ap_expr.h	14.09 KB	-rw-rw-rw-	2020-02-21 02:33
ap_hooks.h	6.01 KB	-rw-rw-rw-	2011-09-23 22:08
ap_listen.h	5.85 KB	-rw-rw-rw-	2016-05-30 23:26
ap_mmn.h	39.26 KB	-rw-rw-rw-	2023-08-29 11:23
ap_mpm.h	10.68 KB	-rw-rw-rw-	2020-04-23 16:32
ap_provider.h	3.55 KB	-rw-rw-rw-	2012-07-03 23:29
ap_regex.h	11.43 KB	-rw-rw-rw-	2022-02-28 13:56
ap_regkey.h	9.18 KB	-rw-rw-rw-	2011-09-23 17:38
ap_release.h	3.15 KB	-rw-rw-rw-	2023-10-16 17:28
ap_slotmem.h	7.26 KB	-rw-rw-rw-	2013-11-17 22:10
ap_socache.h	9.39 KB	-rw-rw-rw-	2012-02-11 00:47
apache_noprobes.h	15.93 KB	-rw-rw-rw-	2012-04-05 00:11
apr.h	18.28 KB	-rw-rw-rw-	2023-03-27 15:53
apr_allocator.h	6.25 KB	-rw-rw-rw-	2018-08-25 17:48
apr_anylock.h	5.06 KB	-rw-rw-rw-	2007-01-15 21:00
apr_atomic.h	6.25 KB	-rw-rw-rw-	2018-09-17 22:20
apr_base64.h	3.86 KB	-rw-rw-rw-	2012-12-23 00:24
apr_buckets.h	64.71 KB	-rw-rw-rw-	2021-09-18 17:25
apr_crypto.h	20.18 KB	-rw-rw-rw-	2017-06-14 00:28
apr_cstr.h	11.42 KB	-rw-rw-rw-	2016-12-03 22:49
apr_date.h	3.57 KB	-rw-rw-rw-	2007-01-15 21:00
apr_dbd.h	23.88 KB	-rw-rw-rw-	2017-04-02 21:57
apr_dbm.h	8.62 KB	-rw-rw-rw-	2008-11-21 08:20
apr_dso.h	2.73 KB	-rw-rw-rw-	2006-08-03 14:55
apr_encode.h	30.98 KB	-rw-rw-rw-	2022-10-18 11:38
apr_env.h	2.12 KB	-rw-rw-rw-	2009-09-26 00:07
apr_errno.h	55.08 KB	-rw-rw-rw-	2016-03-03 18:11
apr_escape.h	17.65 KB	-rw-rw-rw-	2018-08-26 14:24
apr_escape_test_char.h	1.4 KB	-rw-rw-rw-	2023-03-27 15:53
apr_file_info.h	17.59 KB	-rw-rw-rw-	2018-08-26 14:01
apr_file_io.h	43.11 KB	-rw-rw-rw-	2017-03-30 23:53
apr_fnmatch.h	6.23 KB	-rw-rw-rw-	2014-04-15 17:55
apr_general.h	7.36 KB	-rw-rw-rw-	2018-08-26 14:01
apr_getopt.h	6 KB	-rw-rw-rw-	2006-08-03 14:55
apr_global_mutex.h	7.38 KB	-rw-rw-rw-	2017-04-08 01:20
apr_hash.h	10.36 KB	-rw-rw-rw-	2020-11-08 10:13
apr_hooks.h	12.71 KB	-rw-rw-rw-	2013-10-03 17:32
apr_inherit.h	2.14 KB	-rw-rw-rw-	2013-10-03 17:29
apr_ldap.h	5.76 KB	-rw-rw-rw-	2023-01-24 11:36
apr_ldap_init.h	5.81 KB	-rw-rw-rw-	2009-02-19 10:04
apr_ldap_option.h	8.65 KB	-rw-rw-rw-	2009-02-19 10:04
apr_ldap_rebind.h	3.19 KB	-rw-rw-rw-	2009-02-19 10:04
apr_ldap_url.h	3.83 KB	-rw-rw-rw-	2009-02-19 10:04
apr_lib.h	8.47 KB	-rw-rw-rw-	2014-01-16 22:26
apr_md4.h	4.55 KB	-rw-rw-rw-	2007-01-15 21:00
apr_md5.h	6.37 KB	-rw-rw-rw-	2012-07-06 15:41
apr_memcache.h	17.25 KB	-rw-rw-rw-	2010-11-26 16:39
apr_mmap.h	5.18 KB	-rw-rw-rw-	2013-10-03 17:29
apr_network_io.h	36.95 KB	-rw-rw-rw-	2019-05-04 18:44
apr_optional.h	2.8 KB	-rw-rw-rw-	2007-01-15 21:00
apr_optional_hooks.h	3.9 KB	-rw-rw-rw-	2013-10-03 17:32
apr_perms_set.h	1.93 KB	-rw-rw-rw-	2014-04-28 16:08
apr_poll.h	21.04 KB	-rw-rw-rw-	2016-03-25 03:19
apr_pools.h	31.73 KB	-rw-rw-rw-	2022-06-18 00:09
apr_portable.h	20.56 KB	-rw-rw-rw-	2018-08-26 14:01
apr_proc_mutex.h	7.04 KB	-rw-rw-rw-	2017-04-08 01:20
apr_queue.h	4.12 KB	-rw-rw-rw-	2013-10-03 17:32
apr_random.h	5.07 KB	-rw-rw-rw-	2007-07-21 06:16
apr_redis.h	16.07 KB	-rw-rw-rw-	2017-09-27 20:02
apr_reslist.h	7.19 KB	-rw-rw-rw-	2013-10-03 17:32
apr_ring.h	19.28 KB	-rw-rw-rw-	2022-01-06 14:11
apr_rmm.h	4.8 KB	-rw-rw-rw-	2007-01-15 21:00
apr_sdbm.h	6.14 KB	-rw-rw-rw-	2007-10-23 13:59
apr_sha1.h	3.91 KB	-rw-rw-rw-	2007-01-15 21:00
apr_shm.h	9.48 KB	-rw-rw-rw-	2014-04-28 17:15
apr_signal.h	2.8 KB	-rw-rw-rw-	2007-08-05 19:48
apr_siphash.h	6.16 KB	-rw-rw-rw-	2017-06-15 00:00
apr_skiplist.h	14.56 KB	-rw-rw-rw-	2018-08-25 17:48
apr_strings.h	14.92 KB	-rw-rw-rw-	2018-08-26 14:01
apr_strmatch.h	2.69 KB	-rw-rw-rw-	2007-01-15 21:00
apr_support.h	1.65 KB	-rw-rw-rw-	2006-08-03 14:55
apr_tables.h	19.4 KB	-rw-rw-rw-	2020-11-08 09:24
apr_thread_cond.h	5.53 KB	-rw-rw-rw-	2007-06-29 21:20
apr_thread_mutex.h	4.51 KB	-rw-rw-rw-	2017-04-08 01:20
apr_thread_pool.h	11.14 KB	-rw-rw-rw-	2008-05-07 23:45
apr_thread_proc.h	36.11 KB	-rw-rw-rw-	2019-03-08 16:52
apr_thread_rwlock.h	4.78 KB	-rw-rw-rw-	2006-08-03 14:55
apr_time.h	7.62 KB	-rw-rw-rw-	2016-03-05 03:40
apr_uri.h	6.61 KB	-rw-rw-rw-	2009-01-07 22:39
apr_user.h	5.34 KB	-rw-rw-rw-	2013-10-03 17:29
apr_uuid.h	2.13 KB	-rw-rw-rw-	2007-01-15 21:00
apr_version.h	5.44 KB	-rw-rw-rw-	2023-04-13 11:38
apr_want.h	3.01 KB	-rw-rw-rw-	2012-08-15 00:48
apr_xlate.h	6.42 KB	-rw-rw-rw-	2007-01-15 21:00
apr_xml.h	12.54 KB	-rw-rw-rw-	2016-06-14 01:57
apu.h	4.76 KB	-rw-rw-rw-	2023-01-24 11:36
apu_errno.h	5.49 KB	-rw-rw-rw-	2009-01-07 22:35
apu_version.h	4.33 KB	-rw-rw-rw-	2023-02-01 09:56
apu_want.h	1.55 KB	-rw-rw-rw-	2023-01-24 11:36
cache_common.h	2.02 KB	-rw-rw-rw-	2013-05-29 00:30
expat.h	43.55 KB	-rw-rw-rw-	2022-10-25 19:09
heartbeat.h	1.62 KB	-rw-rw-rw-	2014-06-17 16:06
http_config.h	57.78 KB	-rw-rw-rw-	2022-02-23 16:39
http_connection.h	7.15 KB	-rw-rw-rw-	2021-09-26 18:11
http_core.h	37.25 KB	-rw-rw-rw-	2023-08-29 11:23
http_log.h	36.82 KB	-rw-rw-rw-	2016-08-25 16:48
http_main.h	3.25 KB	-rw-rw-rw-	2012-03-26 02:24
http_protocol.h	42.06 KB	-rw-rw-rw-	2022-06-01 16:34
http_request.h	26.34 KB	-rw-rw-rw-	2021-08-10 12:27
http_ssl.h	14.93 KB	-rw-rw-rw-	2022-08-22 00:26
http_vhost.h	4.61 KB	-rw-rw-rw-	2021-05-27 17:08
httpd.h	94.69 KB	-rw-rw-rw-	2022-03-09 16:04
mod_auth.h	4.55 KB	-rw-rw-rw-	2020-02-21 02:33
mod_cache.h	7.27 KB	-rw-rw-rw-	2011-12-03 20:02
mod_cgi.h	2.5 KB	-rw-rw-rw-	2011-09-23 17:38
mod_core.h	3.43 KB	-rw-rw-rw-	2012-09-24 13:49
mod_dav.h	100.22 KB	-rw-rw-rw-	2023-01-09 16:52
mod_dbd.h	4.18 KB	-rw-rw-rw-	2011-09-23 17:38
mod_http2.h	4.69 KB	-rw-rw-rw-	2023-08-29 11:23
mod_include.h	4.01 KB	-rw-rw-rw-	2011-09-23 17:38
mod_log_config.h	2.5 KB	-rw-rw-rw-	2011-09-23 17:38
mod_proxy.h	64.99 KB	-rw-rw-rw-	2023-03-31 18:33
mod_request.h	1.65 KB	-rw-rw-rw-	2011-02-18 20:40
mod_rewrite.h	1.41 KB	-rw-rw-rw-	2014-01-23 16:33
mod_so.h	1.23 KB	-rw-rw-rw-	2011-11-30 12:21
mod_ssl.h	4.99 KB	-rw-rw-rw-	2019-07-30 15:23
mod_ssl_openssl.h	4.79 KB	-rw-rw-rw-	2019-07-30 15:23
mod_status.h	2.45 KB	-rw-rw-rw-	2006-07-12 00:33
mod_watchdog.h	7.55 KB	-rw-rw-rw-	2014-09-05 18:19
mpm_common.h	17.39 KB	-rw-rw-rw-	2021-08-10 12:43
os.h	4.5 KB	-rw-rw-rw-	2021-04-21 05:10
scoreboard.h	9.98 KB	-rw-rw-rw-	2020-02-21 02:33
util_cfgtree.h	3.17 KB	-rw-rw-rw-	2011-09-23 17:38
util_charset.h	2.28 KB	-rw-rw-rw-	2014-11-01 11:19
util_cookies.h	4.99 KB	-rw-rw-rw-	2012-01-09 15:18
util_ebcdic.h	2.78 KB	-rw-rw-rw-	2014-11-01 11:19
util_fcgi.h	10.02 KB	-rw-rw-rw-	2020-02-21 02:33
util_filter.h	26.46 KB	-rw-rw-rw-	2013-04-15 16:37
util_ldap.h	18.33 KB	-rw-rw-rw-	2023-07-07 16:03
util_md5.h	2.19 KB	-rw-rw-rw-	2014-07-17 02:11
util_mutex.h	9.29 KB	-rw-rw-rw-	2011-10-09 22:35
util_script.h	9.8 KB	-rw-rw-rw-	2012-01-09 15:18
util_time.h	4.22 KB	-rw-rw-rw-	2023-07-18 01:16
util_varbuf.h	8.28 KB	-rw-rw-rw-	2014-07-19 21:22
util_xml.h	1.36 KB	-rw-rw-rw-	2014-07-19 21:22
zconf.h	16.83 KB	-rw-rw-rw-	2023-04-18 01:35
zlib.h	96.4 KB	-rw-rw-rw-	2023-08-18 12:45

Rename

/* 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_HOOKS_H
#define APR_HOOKS_H

#include "apu.h"
/* For apr_array_header_t */
#include "apr_tables.h"

/**
 * @file apr_hooks.h
 * @brief Apache hook functions
 */

#ifdef __cplusplus
extern "C" {
#endif
/**
 * @defgroup APR_Util_Hook Hook Functions
 * @ingroup APR_Util
 * @{
 */

/**
 * @defgroup apr_hook_probes Hook probe capability
 * APR hooks provide a trace probe capability for capturing
 * the flow of control and return values with hooks.
 *
 * In order to use this facility, the application must define
 * the symbol APR_HOOK_PROBES_ENABLED and the four APR_HOOK_PROBE_
 * macros described below before including apr_hooks.h in files
 * that use the APR_IMPLEMENT_EXTERNAL_HOOK_* macros.
 *
 * This probe facility is not provided for APR optional hooks.
 * @{
 */

#ifdef APR_HOOK_PROBES_ENABLED
#define APR_HOOK_INT_DCL_UD void *ud = NULL
#else
/** internal implementation detail to avoid the ud declaration when
 * hook probes are not used
 */
#define APR_HOOK_INT_DCL_UD
/**
 * User-defined hook probe macro that is invoked when the hook
 * is run, before calling any hook functions.
 * @param ud A void * user data field that should be filled in by
 * this macro, and will be provided to the other hook probe macros.
 * @param ns The namespace prefix of the hook functions
 * @param name The name of the hook
 * @param args The argument list to the hook functions, with enclosing
 * parens.
 */
#define APR_HOOK_PROBE_ENTRY(ud,ns,name,args)
/**
 * User-defined hook probe macro that is invoked after the hook
 * has run.
 * @param ud A void * user data field that was filled in by the user-
 * provided APR_HOOK_PROBE_ENTRY().
 * @param ns The namespace prefix of the hook functions
 * @param name The name of the hook
 * @param rv The return value of the hook, or 0 if the hook is void.
 * @param args The argument list to the hook functions, with enclosing
 * parens.
 */
#define APR_HOOK_PROBE_RETURN(ud,ns,name,rv,args)
/**
 * User-defined hook probe macro that is invoked before calling a
 * hook function.
 * @param ud A void * user data field that was filled in by the user-
 * provided APR_HOOK_PROBE_ENTRY().
 * @param ns The namespace prefix of the hook functions
 * @param name The name of the hook
 * @param src The value of apr_hook_debug_current at the time the function
 * was hooked (usually the source file implementing the hook function).
 * @param args The argument list to the hook functions, with enclosing
 * parens.
 */
#define APR_HOOK_PROBE_INVOKE(ud,ns,name,src,args)
/**
 * User-defined hook probe macro that is invoked after calling a
 * hook function.
 * @param ud A void * user data field that was filled in by the user-
 * provided APR_HOOK_PROBE_ENTRY().
 * @param ns The namespace prefix of the hook functions
 * @param name The name of the hook
 * @param src The value of apr_hook_debug_current at the time the function
 * was hooked (usually the source file implementing the hook function).
 * @param rv The return value of the hook function, or 0 if the hook is void.
 * @param args The argument list to the hook functions, with enclosing
 * parens.
 */
#define APR_HOOK_PROBE_COMPLETE(ud,ns,name,src,rv,args)
#endif

/** @} */

/** macro to return the prototype of the hook function */    
#define APR_IMPLEMENT_HOOK_GET_PROTO(ns,link,name) \
link##_DECLARE(apr_array_header_t *) ns##_hook_get_##name(void)

/** macro to declare the hook correctly */    
#define APR_DECLARE_EXTERNAL_HOOK(ns,link,ret,name,args) \
typedef ret ns##_HOOK_##name##_t args; \
link##_DECLARE(void) ns##_hook_##name(ns##_HOOK_##name##_t *pf, \
                                      const char * const *aszPre, \
                                      const char * const *aszSucc, int nOrder); \
link##_DECLARE(ret) ns##_run_##name args; \
APR_IMPLEMENT_HOOK_GET_PROTO(ns,link,name); \
typedef struct ns##_LINK_##name##_t \
    { \
    ns##_HOOK_##name##_t *pFunc; \
    const char *szName; \
    const char * const *aszPredecessors; \
    const char * const *aszSuccessors; \
    int nOrder; \
    } ns##_LINK_##name##_t;

/** macro to declare the hook structure */    
#define APR_HOOK_STRUCT(members) \
static struct { members } _hooks;

/** macro to link the hook structure */
#define APR_HOOK_LINK(name) \
    apr_array_header_t *link_##name;

/** macro to implement the hook */
#define APR_IMPLEMENT_EXTERNAL_HOOK_BASE(ns,link,name) \
link##_DECLARE(void) ns##_hook_##name(ns##_HOOK_##name##_t *pf,const char * const *aszPre, \
                                      const char * const *aszSucc,int nOrder) \
    { \
    ns##_LINK_##name##_t *pHook; \
    if(!_hooks.link_##name) \
	{ \
	_hooks.link_##name=apr_array_make(apr_hook_global_pool,1,sizeof(ns##_LINK_##name##_t)); \
	apr_hook_sort_register(#name,&_hooks.link_##name); \
	} \
    pHook=apr_array_push(_hooks.link_##name); \
    pHook->pFunc=pf; \
    pHook->aszPredecessors=aszPre; \
    pHook->aszSuccessors=aszSucc; \
    pHook->nOrder=nOrder; \
    pHook->szName=apr_hook_debug_current; \
    if(apr_hook_debug_enabled) \
	apr_hook_debug_show(#name,aszPre,aszSucc); \
    } \
    APR_IMPLEMENT_HOOK_GET_PROTO(ns,link,name) \
    { \
        return _hooks.link_##name; \
    }

/**
 * Implement a hook that has no return code, and therefore runs all of the
 * registered functions
 * @param ns The namespace prefix of the hook functions
 * @param link The linkage declaration prefix of the hook
 * @param name The name of the hook
 * @param args_decl The declaration of the arguments for the hook
 * @param args_use The names for the arguments for the hook
 * @note The link prefix FOO corresponds to FOO_DECLARE() macros, which
 * provide export linkage from the module that IMPLEMENTs the hook, and
 * import linkage from external modules that link to the hook's module.
 */
#define APR_IMPLEMENT_EXTERNAL_HOOK_VOID(ns,link,name,args_decl,args_use) \
APR_IMPLEMENT_EXTERNAL_HOOK_BASE(ns,link,name) \
link##_DECLARE(void) ns##_run_##name args_decl \
    { \
    ns##_LINK_##name##_t *pHook; \
    int n; \
    APR_HOOK_INT_DCL_UD; \
\
    APR_HOOK_PROBE_ENTRY(ud, ns, name, args_use); \
\
    if(_hooks.link_##name) \
        { \
        pHook=(ns##_LINK_##name##_t *)_hooks.link_##name->elts; \
        for(n=0 ; n < _hooks.link_##name->nelts ; ++n) \
            { \
            APR_HOOK_PROBE_INVOKE(ud, ns, name, (char *)pHook[n].szName, args_use); \
	    pHook[n].pFunc args_use; \
            APR_HOOK_PROBE_COMPLETE(ud, ns, name, (char *)pHook[n].szName, 0, args_use); \
            } \
        } \
\
    APR_HOOK_PROBE_RETURN(ud, ns, name, 0, args_use); \
\
    }

/* FIXME: note that this returns ok when nothing is run. I suspect it should
   really return decline, but that breaks Apache currently - Ben
*/
/**
 * Implement a hook that runs until one of the functions returns something
 * other than OK or DECLINE
 * @param ns The namespace prefix of the hook functions
 * @param link The linkage declaration prefix of the hook
 * @param ret Type to return
 * @param name The name of the hook
 * @param args_decl The declaration of the arguments for the hook
 * @param args_use The names for the arguments for the hook
 * @param ok Success value
 * @param decline Decline value
 * @note The link prefix FOO corresponds to FOO_DECLARE() macros, which
 * provide export linkage from the module that IMPLEMENTs the hook, and
 * import linkage from external modules that link to the hook's module.
 */
#define APR_IMPLEMENT_EXTERNAL_HOOK_RUN_ALL(ns,link,ret,name,args_decl,args_use,ok,decline) \
APR_IMPLEMENT_EXTERNAL_HOOK_BASE(ns,link,name) \
link##_DECLARE(ret) ns##_run_##name args_decl \
    { \
    ns##_LINK_##name##_t *pHook; \
    int n; \
    ret rv = ok; \
    APR_HOOK_INT_DCL_UD; \
\
    APR_HOOK_PROBE_ENTRY(ud, ns, name, args_use); \
\
    if(_hooks.link_##name) \
        { \
        pHook=(ns##_LINK_##name##_t *)_hooks.link_##name->elts; \
        for(n=0 ; n < _hooks.link_##name->nelts ; ++n) \
            { \
            APR_HOOK_PROBE_INVOKE(ud, ns, name, (char *)pHook[n].szName, args_use); \
            rv=pHook[n].pFunc args_use; \
            APR_HOOK_PROBE_COMPLETE(ud, ns, name, (char *)pHook[n].szName, rv, args_use); \
            if(rv != ok && rv != decline) \
                break; \
            rv = ok; \
            } \
        } \
\
    APR_HOOK_PROBE_RETURN(ud, ns, name, rv, args_use); \
\
    return rv; \
    }

/**
 * Implement a hook that runs until the first function returns something
 * other than the value of decline
 * @param ns The namespace prefix of the hook functions
 * @param link The linkage declaration prefix of the hook
 * @param name The name of the hook
 * @param ret Type to return
 * @param args_decl The declaration of the arguments for the hook
 * @param args_use The names for the arguments for the hook
 * @param decline Decline value
 * @note The link prefix FOO corresponds to FOO_DECLARE() macros, which
 * provide export linkage from the module that IMPLEMENTs the hook, and
 * import linkage from external modules that link to the hook's module.
 */
#define APR_IMPLEMENT_EXTERNAL_HOOK_RUN_FIRST(ns,link,ret,name,args_decl,args_use,decline) \
APR_IMPLEMENT_EXTERNAL_HOOK_BASE(ns,link,name) \
link##_DECLARE(ret) ns##_run_##name args_decl \
    { \
    ns##_LINK_##name##_t *pHook; \
    int n; \
    ret rv = decline; \
    APR_HOOK_INT_DCL_UD; \
\
    APR_HOOK_PROBE_ENTRY(ud, ns, name, args_use); \
\
    if(_hooks.link_##name) \
        { \
        pHook=(ns##_LINK_##name##_t *)_hooks.link_##name->elts; \
        for(n=0 ; n < _hooks.link_##name->nelts ; ++n) \
            { \
            APR_HOOK_PROBE_INVOKE(ud, ns, name, (char *)pHook[n].szName, args_use); \
            rv=pHook[n].pFunc args_use; \
            APR_HOOK_PROBE_COMPLETE(ud, ns, name, (char *)pHook[n].szName, rv, args_use); \
\
            if(rv != decline) \
                break; \
            } \
        } \
\
    APR_HOOK_PROBE_RETURN(ud, ns, name, rv, args_use); \
\
    return rv; \
    }

/* Hook orderings */
/** run this hook first, before ANYTHING */
#define APR_HOOK_REALLY_FIRST	(-10)
/** run this hook first */
#define APR_HOOK_FIRST		0
/** run this hook somewhere */
#define APR_HOOK_MIDDLE		10
/** run this hook after every other hook which is defined*/
#define APR_HOOK_LAST		20
/** run this hook last, after EVERYTHING */
#define APR_HOOK_REALLY_LAST	30

/**
 * The global pool used to allocate any memory needed by the hooks.
 */ 
APU_DECLARE_DATA extern apr_pool_t *apr_hook_global_pool;

/**
 * A global variable to determine if debugging information about the
 * hooks functions should be printed.
 */ 
APU_DECLARE_DATA extern int apr_hook_debug_enabled;

/**
 * The name of the module that is currently registering a function.
 */ 
APU_DECLARE_DATA extern const char *apr_hook_debug_current;

/**
 * Register a hook function to be sorted.
 * @param szHookName The name of the Hook the function is registered for
 * @param aHooks The array which stores all of the functions for this hook
 */
APU_DECLARE(void) apr_hook_sort_register(const char *szHookName, 
                                        apr_array_header_t **aHooks);
/**
 * Sort all of the registered functions for a given hook.
 */
APU_DECLARE(void) apr_hook_sort_all(void);

/**
 * Print all of the information about the current hook.  This is used for
 * debugging purposes.
 * @param szName The name of the hook
 * @param aszPre All of the functions in the predecessor array
 * @param aszSucc All of the functions in the successor array
 */
APU_DECLARE(void) apr_hook_debug_show(const char *szName,
                                      const char * const *aszPre,
                                      const char * const *aszSucc);

/**
 * Remove all currently registered functions.
 */
APU_DECLARE(void) apr_hook_deregister_all(void);

/** @} */
#ifdef __cplusplus
}
#endif

#endif /* APR_HOOKS_H */