asio C++ library

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signal_set::cancel (1 of 2 overloads)

Cancel all operations associated with the signal set.

void cancel();

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

Cancellation does not alter the set of registered signals.

Exceptions

asio::system_error

Thrown on failure.

Remarks

If a registered signal occurred before cancel() is called, then the handlers for asynchronous wait operations will:

These handlers can no longer be cancelled, and therefore are passed an error code that indicates the successful completion of the wait operation.


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