Re: [Boost-users] Asio io_service::work destructor throwing mutex exception

On Sat, 12 Dec 2009 23:48:57 +0100, Florian Turck <mail@florianturck.de> wrote:

I am using asio´s io_service::work class to prevent io_service.run() from returning. Unfortunatly on deletion of my object the destructor of io_service::work throws an exception:

terminate called after throwing an instance of 'boost::exception_detail::clone_impl<boost::exception_detail::error_info_injector<boost::system::system_error>

...

' what(): mutex: Invalid argument

I always use a dynamically allocated work object and store it in a scoped_ptr. This works fine (I've changed your code below). However I don't remember having read in the Boost.Asio documentation that your approach is wrong. But I don't remember either where I got this idea with the dynamically allocated object from.

[...] private:

io_service ioService; io_service::work ioWork;

boost::scoped_ptr<io_service::work> ioWork;

[...] MyClass() : ioService(), ioWork(ioService),

ioWork(new io_service::work(ioService)),

[...] if (connected) disconnect();

ioWork.reset();

ioService.stop(); ioThread.join(); [...]

HTH, Boris