Re: [Boost-users] [ASIO] Where to use CoInitizeEx

Subject: Re: [Boost-users] [ASIO] Where to use CoInitizeEx
From: Ovanes Markarian (om_boost_at_[hidden])
Date: 2009-06-03 07:05:33

On Wed, Jun 3, 2009 at 12:45 PM, Igor R <boost.lists_at_[hidden]> wrote:

> > When the SerialPort receive data, pass it to the ATDispatcher that
> > raises a signal to the TETRAMoto object that parses the data and raise
> > the event (always a signal) to the extern:
> >
> > asio::serial_port -> SerialPort -> ATDispatcher -> TetraMoto -|-> EXTERN
> >
> > Now I have to encapsulate this lib into an ActiveX DLL to be used by VB6
> > and I have to call CoInitizeEx in the thread that "raise" events..
> >
> > My question is: where I have to call CoInitizeEx?
>
> You can start the threads with your own thread-function (instead of
> io_service::run) that would call CoInitialize(), io_service::run(),
> CoUninitialize().

If you don't start the threads from the global scope (after the main has
been entered)
you may use the Schwarz-Counter (also known as Nifty-Counter) idiom.

It is well described here:
http://en.wikibooks.org/wiki/More_C%2B%2B_Idioms/Nifty_Counter

This is how Jerry Schwarz implemented the thread safe initialization of
global iostream objects in STL:
cout, cerr, clog etc.

Regards,
Ovanes