Re: [Boost-bugs] [Boost C++ Libraries] #10128: Use lockable_adapter with const objects or const members

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #10128: Use lockable_adapter with const objects or const members
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2014-06-17 16:34:48

#10128: Use lockable_adapter with const objects or const members
-------------------------------+----------------------
  Reporter:  anonymous         |      Owner:  viboes
      Type:  Feature Requests  |     Status:  assigned
 Milestone:  To Be Determined  |  Component:  thread
   Version:  Boost 1.54.0      |   Severity:  Problem
Resolution:                    |   Keywords:
-------------------------------+----------------------

Comment (by viboes):

 The error I'm seen is


 {{{
 test_10128.cpp: In function ‘int func(const Class1&)’:
 test_10128.cpp:29:40: erreur: no matching function for call to
 ‘boost::unique_lock<Class1>::unique_lock(const Class1&)’
      boost::unique_lock<Class1> lock(obj);
 }}}

 A unique_lock<Class1> doesn't accepts a const& Class1 reference.

 You wold need to use


 {{{
     boost::unique_lock<const Class1> lock(obj);
 }}}


 And this patch


 {{{
 --- a/include/boost/thread/lockable_adapter.hpp
 +++ b/include/boost/thread/lockable_adapter.hpp
 @@ -37,11 +37,11 @@ namespace boost
      basic_lockable_adapter()
      {}

 -    void lock()
 +    void lock() const
      {
        lockable().lock();
      }
 -    void unlock()
 +    void unlock() const
      {
        lockable().unlock();
      }

 }}}

 Please, could you tell me if this work for you?



                                         ^

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/10128#comment:2>
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