[boost] [asio] what am I doing wrong with io_service::post()?

From: Scott (cheesy4poofs_at_[hidden])
Date: 2006-10-10 13:16:01

I'm adding a handler to the io_service post method, but the handler is never
called.  Before that, I create a thread to run in the run() method (with an
async read handler to give it work to do).  This is on Windows XP Pro with
MSVS 2003.

The thread that does the post is the UI thread and after calling post it
uses a boost::condition to wait for the transmit to complete.

ioservice.post(boost::bind(&nw::Connection::transmitData, this));
boost::recursive_mutex::scoped_lock syncLock(_syncWriteMutex);
_syncWriteCondition.wait(syncLock);  // wait for data to be transmitted

void Connection::transmitData()
{
        OUTPUT_STRING("Connection::transmitData()");  // never called
}

Is there some interaction between the windows message handling pump thread
and IO completion ports that I'm not aware of?  Does the thread need to go
back into the message pump before I'll get a post() callback?  

Thanks,
Scott