Function librocksdb_sys::crocksdb_logger_create

pub unsafe extern "C" fn crocksdb_logger_create(
    state: *mut c_void, 
    destructor: extern "C" fn(_: *mut c_void), 
    logv: extern "C" fn(ctx: *mut c_void, log_level: DBInfoLogLevel, log: *const c_char)
) -> *mut DBLogger