[boost] Re: Asynchronous I/O

From: Hans Malherbe (Hans.Malherbe_at_[hidden])
Date: 2005-03-23 05:14:37

--- Don G skryf:

>Of the mechanisms discussed, I am not sure I understand what you mean
>by async I/O with only one thread. I can imagine a nonblocking/select
>style approach that has no extra threads, but as soon as the main
>thread is not waiting on I/O itself (my interpretation of "async"),
>there needs to be threads to do the waiting.

The main thread does the waiting.

In Windows NT you will either wait on the event flag in the OVERLAPPED
structure or specify a completion routine and wait in an alertable state
with the SleepEx or one of the *WaitFor*ObjectsEx functions.

Groete
Hans Malherbe

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