[c++-pthreads] What are the real issues?

[Ted Baker]

>   In a catch block handling a cancellation exception, functions
>     identified as cancellation points work normally.

Do you mean to imply that the implementation of each of these functions
looks to see whether the call is coming from inside a catch block?
(It seems you are asking the behavior of these calls to vary,
depending on the context of the call, working normally in a
catch block but failing outside.)

>   Eventually the inability of the thread to achieve anything leads it
>     to top-level code equipped to recognize the cancelled condition as 
>     such, and to clean up and die in a controlled way.

This assumes the code has been structured with cancellation in 
mind, so that control passes upward in the way you expect, or
that you are lucky.

--Ted