Re: OT: Windows (Was: Re: Open Source does not mean easily

cross@spitfire.i.gajendra.net (Dan Cross) writes:

[...]

there is no reason you cannot, say, have a signal handler that
broadcasts on a condition variable after an asynchronous IO operation
completes, thus waking up a thread.

The pthread_cond_* calls are not async-signal safe and hence, this is
either undefined behaviour (newly introduced with POSIX.1-2024) or
undefined behaviour if the signal handler interrupted something that
isn't async-signal safe (prior to POSIX.1-2024 and still retained in the
current text).

However, POSIX semaphores can safely be used for that.