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apr_optional_hooks.h

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00060 #ifndef APR_OPTIONAL_HOOK_H
00061 #define APR_OPTIONAL_HOOK_H
00062 
00063 #include "apr_tables.h"
00064 
00065 #ifdef __cplusplus
00066 extern "C" {
00067 #endif
00068 
00086 APU_DECLARE(void) apr_optional_hook_add(const char *szName,void (*pfn)(void),
00087                                         const char * const *aszPre,
00088                                         const char * const *aszSucc,
00089                                         int nOrder);
00090 
00102 #define APR_OPTIONAL_HOOK(ns,name,pfn,aszPre,aszSucc,nOrder) do { \
00103   ns##_HOOK_##name##_t *apu__hook = pfn; \
00104   apr_optional_hook_add(#name,(void (*)(void))apu__hook,aszPre, aszSucc, nOrder); \
00105 } while (0)
00106 
00112 APU_DECLARE(apr_array_header_t *) apr_optional_hook_get(const char *szName);
00113 
00128 #define APR_IMPLEMENT_OPTIONAL_HOOK_RUN_ALL(ns,link,ret,name,args_decl,args_use,ok,decline) \
00129 link##_DECLARE(ret) ns##_run_##name args_decl \
00130     { \
00131     ns##_LINK_##name##_t *pHook; \
00132     int n; \
00133     ret rv; \
00134     apr_array_header_t *pHookArray=apr_optional_hook_get(#name); \
00135 \
00136     if(!pHookArray) \
00137         return ok; \
00138 \
00139     pHook=(ns##_LINK_##name##_t *)pHookArray->elts; \
00140     for(n=0 ; n < pHookArray->nelts ; ++n) \
00141         { \
00142         rv=(pHook[n].pFunc)args_use; \
00143 \
00144         if(rv != ok && rv != decline) \
00145             return rv; \
00146         } \
00147     return ok; \
00148     }
00149 
00151 #ifdef __cplusplus
00152 }
00153 #endif
00154 
00155 #endif /* APR_OPTIONAL_HOOK_H */

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