Posix message queue

Hello, together

I am trying to construct a thread (inheritated from IceUtil::Thread ) that uses POSIX IPC, for example message queue functions, but I cannot get it run.
The code is like this for example:


class TestThread : public Ice::Util::Thread
{
public:

TestThread(string name)
: _name(name)
{}

virtual void run()
{
...
message_queue= mq_open(...);
signal_event.sigev_notify=SIGEV_SIGNAL;
signal_event.sigev_signo=SIGUSR1;

mq_notify(message_queue, &signal_event);

while(1)
{
sigtimedwait(...);

dosomething();

}
}
private:
string _name;
};

int main()
{
ThreadPtr myTester = new TestThread("notify");
ThreadControl t = myTester->start();

t.join();
return 0;
}


when I run the program, mq_notify() prompt just the SIGUSR1 name:
User signal 1
then the program exit.

My question is, can ICE support POSIX message queue functions? or is there a special way to enable that? Thanks for your help!

Y. Wang