[Boost-users] shared_ptr questions

Subject: [Boost-users] shared_ptr questions
From: John Dlugosz (JDlugosz_at_[hidden])
Date: 2009-08-17 12:12:29

I'm looking at shared_ptr and weak_ptr as a TR1 standard approach.  It is hard to follow the implementation, but I'm wondering about some specific issues.

My set of classes (<http://www.dlugosz.com/Repertoire/refman/Classics/Smart%20Pointers%20Overview.html#toptop>), published over ten years ago, has similar features.  My class "baro" is like your weak_pointer.

I recall a threading issue where one thread is dropping the last owned reference at the same time another thread is realizing a weak_pointer.  The first decrements the refcount to zero, and the second increments it again.  Is the object destructed?  I'm using a specific mechanism to support this and related features, and I don't see that in your code.

Is the Boost implementation for Windows (32 and 64-bit) robust and lock-free in cases like this?  How does it work?

--John

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