Re: [boost] [thread] monitor

From: Roland Schwarz (roland.schwarz_at_[hidden])
Date: 2006-03-17 07:39:04

Vaclav Vesely wrote:
> I all the time use mutexs and conditions in in following manner:
> 
> 	// declaration
> 	Type      m_value;
> 	mutex     m_value_mutex;
> 	condition m_value_condition;
> 
> 	// set new value
> 	{
> 		mutex::scoped_lock lock(m_mutex);
> 		m_value = new_value;
> 	}
> 
> 	// wait for some condition
> 	{
> 	        mutex::scoped_lock lock(m_mutex);
> 	        while(<condition>)
> 	            m_condition.wait(lock);
> 	}

I cannot see where you are signaling the condition.

> 
> I'm wondering about something like this:
> 
> 	// declaration
> 	monitor<Type> m_value;
> 
> 	// set new value - locking in done in a monitor assignment
> 	m_value = new_value
> 
> 	// wait for some condition
> 	m_value.wait(<lambda expression>)
> Do you think this concept is generally useful and should be added to
> the
> library?

This might be useful, but can be added later on, since it can easily be
expressed in terms of the basic primitives.

Currently we are busy doing a rewrite of the library to get it under the new
boost license.

regards, roland