Re: [boost] synchronized with boost::threads?

From: William E. Kempf (wekempf_at_[hidden])
Date: 2003-05-08 09:26:12

Roland Richter said:
> Dear all,
>
>   I'm new with Boost.Threads; I've just worked with
>   Java Threads so far.
>
>   One feature of the Java language is the "synchronized"
>   keyword - to make variables, methods, code blocks etc.
>   thread-safe. So, when I first came into the situation
>   that I needed threads in C++ as well, I thought of a
>   way how to reflect that feature into C++.
>
>   It seems to be easy to synchronize variables - see the
>   very minimalistic draft below. But what about synchronized
>   class methods etc.?

Java synchronized method:

class Foo
{
  public synchronized void bar() { /* code */ }
}

Boost.Threads synchronized method:

class Foo
{
public:
  void bar() { boost::mutex::scoped_lock lock(m_mutex); /* code */ }
private:
  boost::mutex m_mutex;
};

Java synchronized block:

class Foo
{
  public void bar() {
    synchronized (this) {
      /* code */
    }
  }
}

Boost.Threads synchronized block:

class Foo
{
public:
  void bar() {
    {
      boost::mutex::scoped_lock lock(m_mutex);
      /* code */
    }
  }
private:
  boost::mutex m_mutex;
};

>   Is it worth to go further into that direction?
>
>   I mean, the Boost.Thread library seems to be designed with
>   safety in mind, but is still a little bit low-level.
>
>   Are there any efforts to enhance the library further?

Yes.

-- 
William E. Kempf