Re: [Boost-users] memory leak when using shared_from_this

Subject: Re: [Boost-users] memory leak when using shared_from_this
From: jochemspek (spam_at_[hidden])
Date: 2011-01-12 11:35:37

sorry - i found it in the documentation. I thought the problem was in
creating the pointer, but it was in the cyclic nature of the parent/child
relationship. for reference, it's in the docs on shared_ptr at

http://www.boost.org/doc/libs/1_45_0/libs/smart_ptr/shared_ptr.htm

"Because the implementation uses reference counting, cycles of shared_ptr
instances will not be reclaimed. For example, if main() holds a shared_ptr
to A, which directly or indirectly holds a shared_ptr back to A, A's use
count will be 2. Destruction of the original shared_ptr will leave A
dangling with a use count of 1. Use weak_ptr to 'break cycles.'"

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