Re: [Boost-users] [asio] reopening of serial port fails - why?

Subject: Re: [Boost-users] [asio] reopening of serial port fails - why?
From: Bill Somerville (bill_at_[hidden])
Date: 2009-03-06 06:47:02

Markus Werle wrote:
> Markus Werle <numerical.simulation <at> web.de> writes:
>
>   
>> while (true) // PROBLEM: reentering this loop fails - why?
>> {
>>   io_service.reset();
>>   boost::thread t(boost::bind(&boost::asio::io_service::run, &io_service)); 
>> [...]
>>
>> Now the reconnection does not succeed either and 
>> after some tries I obtain an invalid file handle error.
>>
>> I guess I am missing some fundamental thing with asio ...
>>     
>
> ... or maybe it is some bug. 
> http://stackoverflow.com/questions/541062/boostasioserialport-reading-after-
> reconnecting-device
>
> Any further comment?
>   

I think you should simplify your close semantics, passing an error code 
to your do_close() method is making it do more work than necessary.

I don't understand the recreation of the serial_port object although I 
have not used the serial_port functionality myself. Also the close() 
method posts a do_close() call with a default constructed error object 
which is not handled correctly.

I'm not sure why you need to use a loop in the main routine, if you want 
a server then use pending async calls to keep the io_service alive, if 
you want a client then perhaps errors should simply cause graceful 
termination.

... snip ...

HTH
--
Bill Somerville