Re: [Boost-users] ASIO cancel question

Hi, Derik. In my opinion, you must not place together async operations and their sequence in the queue. The word "async" means "somewhen" and does not means some order. So I suggest not to rely on "the handlers placed on the queue always in sequence". I try to design my async apps with such thinking. When you need some sequence, just schedule 1 op, and when its completion handler fires - schedule 2nd op... and so on. As for "2", I should say that at least in one-thread implementation, the timer will fire with error code, not success code. As for "1", I assume the same - error codes will be not success codes. The most important thing - call "cancel" inside the io_service thread (use "post" some function, as Igor already said)