Re: Threading classes concept ?

From:
red floyd <no.spam@here.dude>
Newsgroups:
comp.lang.c++
Date:
Mon, 19 Mar 2007 20:50:42 GMT
Message-ID:
<CICLh.14477$FG1.587@newssvr27.news.prodigy.net>
Gianni Mariani wrote:

red floyd wrote:

class Thread
{
   private:
       virtual void thread_func() = 0;
       static void start_thread(void* param)
       {
            static_cast<Thread*>(param)->thread_func();
       }
       void start()
       {
          os_specific_thread_starter(&start_thread, this);
       }
    protected:
       Thread() { }
       virtual ~Thread() { }
    private:
       Thread(const Thread&);
       Thread& operator=(const Thread&);
};

Then you have the following:

class MyThread : public Thread
{
    private:
      int n;
    public:
       MyThread(int n_) : Thread(), n(n_) { }
       ~MyThread();
    private:
      void thread_func()
      {
         std::cout << "Hello from thread " << n << std::endl;
      }
};

All you need to do is define thread_func.


a) Need synchronization in destructor


Left as exercise for the reader. Note that this is really skeleton
code, no error checking etc... It's just "here's the concept" pseudo-code.

b) Must not be copy constructible or assignable


Agreed. I did it in the base, but not the child. Shown as an example.
However, since the base has private unimplemented copy/assignment, the
default copy/assignment for the child should fail, correct?

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