Type Alias MDBX_predicate_func 

pub type MDBX_predicate_func = Option<unsafe extern "C" fn(*mut c_void, *mut iovec, *mut iovec, *mut c_void) -> i32>;

Available on crate feature mdbx only.

Aliased Type

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

Variants

None

No value.

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

Some value of type T.

Layout

Note: Unable to compute type layout, possibly due to this type having generic parameters. Layout can only be computed for concrete, fully-instantiated types.