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 * reserved.
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#ifndef APR_OPTIONAL_HOOK_H
#define APR_OPTIONAL_HOOK_H

#include "apr_tables.h"

#ifdef __cplusplus
extern "C" {
#endif

APU_DECLARE(void) apr_optional_hook_add(const char *szName,void (*pfn)(void),
                                        const char * const *aszPre,
                                        const char * const *aszSucc,
                                        int nOrder);

#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)

APU_DECLARE(apr_array_header_t *) apr_optional_hook_get(const char *szName);

#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 */

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