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- /* ====================================================================
- * The Apache Software License, Version 1.1
- *
- * Copyright (c) 2000-2003 The Apache Software Foundation. All rights
- * reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. The end-user documentation included with the redistribution,
- * if any, must include the following acknowledgment:
- * "This product includes software developed by the
- * Apache Software Foundation (http://www.apache.org/)."
- * Alternately, this acknowledgment may appear in the software itself,
- * if and wherever such third-party acknowledgments normally appear.
- *
- * 4. The names "Apache" and "Apache Software Foundation" must
- * not be used to endorse or promote products derived from this
- * software without prior written permission. For written
- * permission, please contact apache@apache.org.
- *
- * 5. Products derived from this software may not be called "Apache",
- * nor may "Apache" appear in their name, without prior written
- * permission of the Apache Software Foundation.
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
- * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
- * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
- * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
- * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- * ====================================================================
- *
- * This software consists of voluntary contributions made by many
- * individuals on behalf of the Apache Software Foundation. For more
- * information on the Apache Software Foundation, please see
- * <http://www.apache.org/>.
- */
- /**
- * @file apr_optional_hooks.h
- * @brief Apache optional hook functions
- */
-
-
- #ifndef APR_OPTIONAL_HOOK_H
- #define APR_OPTIONAL_HOOK_H
-
- #include "apr_tables.h"
-
- #ifdef __cplusplus
- extern "C" {
- #endif
- /**
- * @defgroup APR_Util_OPT_HOOK Optional Hook Functions
- * @ingroup APR_Util_Hook
- * @{
- */
- /**
- * Function to implemnt the APR_OPTIONAL_HOOK Macro
- * @internal
- * @see APR_OPTIONAL_HOOK
- *
- * @param name The name of the hook
- * @param pfn A pointer to a function that will be called
- * @param aszPre a NULL-terminated array of strings that name modules whose hooks should precede this one
- * @param aszSucc a NULL-terminated array of strings that name modules whose hooks should succeed this one
- * @param nOrder an integer determining order before honouring aszPre and aszSucc (for example HOOK_MIDDLE)
- */
-
-
- APU_DECLARE(void) apr_optional_hook_add(const char *szName,void (*pfn)(void),
- const char * const *aszPre,
- const char * const *aszSucc,
- int nOrder);
-
- /**
- * Hook to an optional hook.
- *
- * @param ns The namespace prefix of the hook functions
- * @param name The name of the hook
- * @param pfn A pointer to a function that will be called
- * @param aszPre a NULL-terminated array of strings that name modules whose hooks should precede this one
- * @param aszSucc a NULL-terminated array of strings that name modules whose hooks should succeed this one
- * @param nOrder an integer determining order before honouring aszPre and aszSucc (for example HOOK_MIDDLE)
- */
-
- #define APR_OPTIONAL_HOOK(ns,name,pfn,aszPre,aszSucc,nOrder) \
- ((void (APR_THREAD_FUNC *)(const char *,ns##_HOOK_##name##_t *,const char * const *, \
- const char * const *,int))&apr_optional_hook_add)(#name,pfn,aszPre, \
- aszSucc, nOrder)
-
- /**
- * @internal
- * @param szName - the name of the function
- * @return the hook structure for a given hook
- */
- APU_DECLARE(apr_array_header_t *) apr_optional_hook_get(const char *szName);
-
- /**
- * Implement an optional 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 The type of the return value of the hook
- * @param ret The type of the return value 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
- * @param ok Success value
- * @param decline Decline value
- */
- #define APR_IMPLEMENT_OPTIONAL_HOOK_RUN_ALL(ns,link,ret,name,args_decl,args_use,ok,decline) \
- link##_DECLARE(ret) ns##_run_##name args_decl \
- { \
- ns##_LINK_##name##_t *pHook; \
- int n; \
- ret rv; \
- apr_array_header_t *pHookArray=apr_optional_hook_get(#name); \
- \
- if(!pHookArray) \
- return ok; \
- \
- pHook=(ns##_LINK_##name##_t *)pHookArray->elts; \
- for(n=0 ; n < pHookArray->nelts ; ++n) \
- { \
- rv=(pHook[n].pFunc)args_use; \
- \
- if(rv != ok && rv != decline) \
- return rv; \
- } \
- return ok; \
- }
-
- /** @} */
- #ifdef __cplusplus
- }
- #endif
-
- #endif /* APR_OPTIONAL_HOOK_H */
-