Re: [Boost-users] Good lock_guard<mytype> example

Subject: Re: [Boost-users] Good lock_guard<mytype> example
From: John Rocha (jrr_at_[hidden])
Date: 2013-04-01 19:20:35

Hello Michael,

*this is a pointer to the mutex that the 'lock_guard' is using. The name "this" 
is unfortunate since it overlaps with an object's 'this' pointer... unless your 
class 'mytype' is derived from a mutex....

I've usually seen it used on just a boost::mutex.

    boost::mutex    the_lock;

and later in some code associated with the lock, you could activate it in a 
block by doing;

    boost::lock_guard<boost::mutex>    lock(the_lock);
    ...do stuff....

Consider looking at: 
http://www.boost.org/doc/libs/1_53_0/doc/html/thread/synchronization.html#thread.synchronization.tutorial 
and searching for lock_guard I think it has a pretty decent example there.

On 4/1/2013 4:12 PM, Michael Powell wrote:
> Hello,
>
> The pattern goes something like this: boost::lock_guard<mytype> guard(*this).
>
> However, compiler is asking for a lock or unlock. I don't know what this is, 
> or what it should be.
>
> Thank you...
>
> Regards,
>
> Michael Powell
>
>
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