Type Alias CSSM_CALLBACK 

pub type CSSM_CALLBACK = Option<unsafe extern "C-unwind" fn(CSSM_DATA_PTR, *mut c_void) -> CSSM_RETURN>;

👎Deprecated

Available on crate features SecAsn1Types and cssmconfig and cssmtype only.

Apple’s documentation

Aliased Type

pub enum CSSM_CALLBACK {
    None,
    Some(unsafe extern "C-unwind" fn(*mut cssm_data, *mut c_void) -> i32),
}

Variants

None

No value.

Some(unsafe extern "C-unwind" fn(*mut cssm_data, *mut c_void) -> i32)

Some value of type T.