[Boost-users] [asio] when deadline_timer::cancel() returns

From: Yuval Ronen (ronen_yuval_at_[hidden])
Date: 2007-07-29 11:28:50

The Asio docs for deadline_timer::cancel say that "This function forces 
the completion of any pending asynchronous wait operations against the 
timer". Let's say I have a thread executing io_service::run, and is now 
invoking a completion handler of a deadline_timer. While this completion 
handler is underway, a second thread is calling cancel() on that 
deadline_timer. Is the cancel() call supposed to block until the 
completion handler is finished? To my best understanding, both according 
to the docs, and according to what seems to be logical to me, the answer 
is "yes, it should block". However, it doesn't. Is it a bug, or by design?

Yuval