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void | apr_dynamic_fn_register (const char *szName, apr_opt_fn_t *pfn) |
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apr_opt_fn_t * | apr_dynamic_fn_retrieve (const char *szName) |
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Typesafe registration and retrieval of functions that may not be present (i.e. functions exported by optional modules)
◆ APR_DECLARE_OPTIONAL_FN
Declare an optional function.
- Parameters
-
ret | The return type of the function |
name | The name of the function |
args | The function arguments (including brackets) |
◆ APR_OPTIONAL_FN_TYPE
#define APR_OPTIONAL_FN_TYPE |
( |
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name | ) |
apr_OFN_##name##_t |
The type of an optional function.
- Parameters
-
name | The name of the function |
◆ APR_REGISTER_OPTIONAL_FN
#define APR_REGISTER_OPTIONAL_FN |
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name | ) |
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Value: do { \
APR_OPTIONAL_FN_TYPE(name) *apu__opt = name; \
} while (0)
void() apr_opt_fn_t(void)
Definition: apr_optional.h:59
Register an optional function. This can be later retrieved, type-safely, by name. Like all global functions, the name must be unique. Note that, confusingly but correctly, the function itself can be static!
- Parameters
-
name | The name of the function |
◆ APR_RETRIEVE_OPTIONAL_FN
#define APR_RETRIEVE_OPTIONAL_FN |
( |
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name | ) |
(APR_OPTIONAL_FN_TYPE(name) *)apr_dynamic_fn_retrieve(#name) |
Retrieve an optional function. Returns NULL if the function is not present.
- Parameters
-
name | The name of the function |
◆ apr_opt_fn_t
typedef void() apr_opt_fn_t(void) |
XXX: This doesn't belong here, then! Private function! DO NOT USE!