Hi Roland,
Roland Schwarz
If you carefully rethink the need for cancellation you most likely will find that you really will need cancellation rarely. You almost always can use some other interthread communication mechanisms.
It also almost always requires sneaking an ugly "special case" into an otherwise clean and simple code (e.g., a special cancellation pipe for a thread waiting on select, a special flag for a thread waiting on condvar, etc.). It is in essence very similar to the exceptions vs error codes debate; as with exceptions, with proper thread cancellation you can separate the main logic from the thread termination code.
Full blown cancellation often is a too coarse grained tool anyways.
I find this statement unsubstantiated. Can you elaborate a bit on this? thanks, -boris -- Boris Kolpackov Code Synthesis Tools CC http://www.codesynthesis.com Open-Source, Cross-Platform C++ XML Data Binding