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hzhuo1@gmail.com
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 Posted: Wed Jul 12, 2006 4:20 pm Post subject: Where can I find destructor of the template shared_ptr? |
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In the standard C++ TR1 draft, I find the following regulation:
2.2.3.2 shared_ptr destructor
~shared_ptr();
1 Effects:
- If *this is empty, there are no side effects.
- If *this shares ownership with another shared_ptr instance
(use_count() >
1), decrements that instance's
use count.
- Otherwise, if *this owns a pointer p and a deleter d, d(p) is
called.
- Otherwise, *this owns a pointer p, and delete p is called.
2 Throws: nothing.
But when I refer to shared_ptr.hpp implemented by Boost,I can't find
any destructors of shared_ptr.Who can tell me how it is implemented?I
will be appreciative.
The library Boost can be downloaded as a .zip file at the following
webpage:
http://sourceforge.net/project/showfiles.php?group_id=7586
And the webpage of Boost is http://boost.sourceforge.net/.
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Richard Smith
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| Posted: Wed Jul 12, 2006 6:55 pm Post subject: Re: Where can I find destructor of the template shared_ptr? |
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hzhuo1 (AT) gmail (DOT) com wrote:
| Quote: | In the standard C++ TR1 draft, I find the following regulation:
[...]
But when I refer to shared_ptr.hpp implemented by Boost,I can't find
any destructors of shared_ptr.
|
The compiler generated implentation does the right thing -- it calls
the destructor on each member and one of these (specifically, the
detail::shared_count member) does the action described in your quote
from TR1.
| Quote: | Who can tell me how it is implemented?I
|
Have a look in boost/detail/shared_count.hpp. But if you just want to
know what it does, rather than how it does it, it does what the boost
and/or TR1 documentation says it does.
--
Richard Smith
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