Cancel any asynchronous operations that are waiting on the timer.

std::size_t cancel(
    boost::system::error_code & ec);

This function forces the completion of any pending asynchronous wait operations against the timer. The handler for each cancelled operation will be invoked with the boost::asio::error::operation_aborted error code.

Cancelling the timer does not change the expiry time.

Parameters

Return Value

The number of asynchronous operations that were cancelled.