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apr_optional.h
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15  */
16 
17 #ifndef APR_OPTIONAL_H
18 #define APR_OPTIONAL_H
19 
20 #include "apu.h"
25 #ifdef __cplusplus
26 extern "C" {
27 #endif
28 
42 #define APR_OPTIONAL_FN_TYPE(name) apr_OFN_##name##_t
43 
50 #define APR_DECLARE_OPTIONAL_FN(ret,name,args) \
51 typedef ret (APR_OPTIONAL_FN_TYPE(name)) args
52 
59 typedef void (apr_opt_fn_t)(void);
61 APU_DECLARE_NONSTD(void) apr_dynamic_fn_register(const char *szName,
62  apr_opt_fn_t *pfn);
63 
70 #define APR_REGISTER_OPTIONAL_FN(name) do { \
71  APR_OPTIONAL_FN_TYPE(name) *apu__opt = name; \
72  apr_dynamic_fn_register(#name,(apr_opt_fn_t *)apu__opt); \
73 } while (0)
74 
78 APU_DECLARE(apr_opt_fn_t *) apr_dynamic_fn_retrieve(const char *szName);
79 
84 #define APR_RETRIEVE_OPTIONAL_FN(name) \
85  (APR_OPTIONAL_FN_TYPE(name) *)apr_dynamic_fn_retrieve(#name)
86 
88 #ifdef __cplusplus
89 }
90 #endif
91 
92 #endif /* APR_OPTIONAL_H */