initialize-sigio-handling

Arguments:

Sigio handling is not supported on Windows.

Initializes sigio handling. Note that SIGIO handlers will only work if the sigio interface is available, as indicated by the return value of the function sigio-supported-p. See set-sigio-handler.

Note that only input signals are available to Allegro CL. (Output signals are filtered out.)

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Created 2019.8.20.