Type Definition lmdb_sys::MDB_msg_func

pub type MDB_msg_func = Option<unsafe extern "C" fn(msg: *const c_char, ctx: *mut c_void) -> c_int>;

@brief A callback function used to print a message from the library.

@param[in] msg The string to be printed. @param[in] ctx An arbitrary context pointer for the callback. @return < 0 on failure, >= 0 on success.