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apr_optional_hooks.h
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22 #ifndef APR_OPTIONAL_HOOK_H
23 #define APR_OPTIONAL_HOOK_H
24 
25 #include "apr_tables.h"
26 
27 #ifdef __cplusplus
28 extern "C" {
29 #endif
30 
48 APU_DECLARE(void) apr_optional_hook_add(const char *szName,void (*pfn)(void),
49  const char * const *aszPre,
50  const char * const *aszSucc,
51  int nOrder);
52 
64 #define APR_OPTIONAL_HOOK(ns,name,pfn,aszPre,aszSucc,nOrder) do { \
65  ns##_HOOK_##name##_t *apu__hook = pfn; \
66  apr_optional_hook_add(#name,(void (*)(void))apu__hook,aszPre, aszSucc, nOrder); \
67 } while (0)
68 
74 APU_DECLARE(apr_array_header_t *) apr_optional_hook_get(const char *szName);
75 
90 #define APR_IMPLEMENT_OPTIONAL_HOOK_RUN_ALL(ns,link,ret,name,args_decl,args_use,ok,decline) \
91 link##_DECLARE(ret) ns##_run_##name args_decl \
92  { \
93  ns##_LINK_##name##_t *pHook; \
94  int n; \
95  ret rv; \
96  apr_array_header_t *pHookArray=apr_optional_hook_get(#name); \
97 \
98  if(!pHookArray) \
99  return ok; \
100 \
101  pHook=(ns##_LINK_##name##_t *)pHookArray->elts; \
102  for(n=0 ; n < pHookArray->nelts ; ++n) \
103  { \
104  rv=(pHook[n].pFunc)args_use; \
105 \
106  if(rv != ok && rv != decline) \
107  return rv; \
108  } \
109  return ok; \
110  }
111 
113 #ifdef __cplusplus
114 }
115 #endif
116 
117 #endif /* APR_OPTIONAL_HOOK_H */