Function spatialite_sys::sqlite3_wal_hook

pub unsafe extern "C" fn sqlite3_wal_hook(
    arg1: *mut sqlite3, 
    arg2: Option<unsafe extern "C" fn(arg1: *mut c_void, arg2: *mut sqlite3, arg3: *const c_char, arg4: c_int) -> c_int>, 
    arg3: *mut c_void
) -> *mut c_void