Insight of the day
Mar. 8th, 2007 01:30 pm![[personal profile]](https://www.dreamwidth.org/img/silk/identity/user.png){kind=small}
pphaneufI must be very silly, but I just realized that a Unix pipe is a semaphore. It's better in some aspects (is select()able) and worse in others (SEM_VALUE_MAX is lower). Cool.
In that context, the "signal handler that writes to a pipe" trick makes a new kind of sense (the semaphore equivalent, sem_post(), is the only synchronization function that is safe to use in a signal handler).
In that context, the "signal handler that writes to a pipe" trick makes a new kind of sense (the semaphore equivalent, sem_post(), is the only synchronization function that is safe to use in a signal handler).
