I'm working on developing TDMA on GR using RedHat Enterprise Linux WS 2.6.
I intend to use semaphores or mutex for controlling access to shared memory
when events like packet arrivals and timeouts occur.
However, I understand based on the man pages that a number of the calls for
semaphores and mutex may cause a deadlock when the calling thread happens to
be handling an asynchronous signal.
First of all, what are asynchronous signals in this context? If they refer
to events whose time occurance is unpredictable, wouldn't such signals apply
to a really large number of cases, including packet arrivals?
The man pages say that sem_post is the only POSIX call that handles
asynchronous signals fine. What use is this if I can't use sem_wait with
asynchronous signals?
What is your experience with semaphores and mutex?
Jeremy
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