[Boost-bugs] [Boost C++ Libraries] #8135: [lockfree] compile time capacity difference behavior

Subject: [Boost-bugs] [Boost C++ Libraries] #8135: [lockfree] compile time capacity difference behavior
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2013-02-21 10:22:16

#8135: [lockfree] compile time capacity difference behavior
-------------------------------------------------------+--------------------
 Reporter:  Akira Takahashi <faithandbrave@…>          |       Owner:  timblechmann
     Type:  Bugs                                       |      Status:  new         
Milestone:  To Be Determined                           |   Component:  lockfree    
  Version:  Boost 1.53.0                               |    Severity:  Problem     
 Keywords:                                             |  
-------------------------------------------------------+--------------------
 http://lists.boost.org/boost-users/2013/02/77649.php


 I confused with boost::lockfree::queue behavior.

 Fist, run-time capacity:
 {{{
 #include <iostream>
 #include <boost/lockfree/queue.hpp>

 int main()
 {
     boost::lockfree::queue<int, boost::lockfree::fixed_sized<true>>
 que(3);

     std::cout << std::boolalpha;

     std::cout << que.push(1) << std::endl; // true
     std::cout << que.push(2) << std::endl; // true
     std::cout << que.push(3) << std::endl; // true
     std::cout << que.push(4) << std::endl; // false
 }
 }}}
 I think this behavior is correct.

 But, compile-time capacity:
 {{{
 #include <iostream>
 #include <boost/lockfree/queue.hpp>

 int main()
 {
     boost::lockfree::queue<int, boost::lockfree::capacity<3>> que;

     std::cout << std::boolalpha;

     std::cout << que.push(1) << std::endl; // true
     std::cout << que.push(2) << std::endl; // true
     std::cout << que.push(3) << std::endl; // false : why?
     std::cout << que.push(4) << std::endl; // false
 }
 }}}

 Is this bug or specification?

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/8135>
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