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From "Ivan Pechorin (JIRA)" <j...@apache.org>
Subject [jira] Updated: (AMQCPP-282) deletion of pointer to incomplete type 'decaf::lang::ThreadProperties'; no destructor called
Date Tue, 26 Jan 2010 17:58:32 GMT

     [ https://issues.apache.org/activemq/browse/AMQCPP-282?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Ivan Pechorin updated AMQCPP-282:
---------------------------------

    Attachment: MSVC_C4150.diff

patch against current trunk (svn revision 902255)

> deletion of pointer to incomplete type 'decaf::lang::ThreadProperties'; no destructor
called
> --------------------------------------------------------------------------------------------
>
>                 Key: AMQCPP-282
>                 URL: https://issues.apache.org/activemq/browse/AMQCPP-282
>             Project: ActiveMQ C++ Client
>          Issue Type: Bug
>    Affects Versions: 3.1
>         Environment: Visual Studio 2008 SP1 on Win32 (Windows Server 2003 R2, 32-bit)
>            Reporter: Ivan Pechorin
>            Assignee: Timothy Bish
>         Attachments: MSVC_C4150.diff
>
>
> ActiveMQ C++ client gives the C4150 warning "deletion of pointer to incomplete type;
no destructor called" multiple times when compiling it with Visual C++ 2008 SP1 on Win32.
> There are two different places that generate this warning:
> 1) decaf::lang::ThreadProperties
> 1>SimpleLogger.cpp
> 1>c:\dev_vc9\activemq\activemq-cpp-trunk\src\main\decaf/lang/Pointer.h(358) : warning
C4150: deletion of pointer to incomplete type 'decaf::lang::ThreadProperties'; no destructor
called
> 1>        c:\dev_vc9\activemq\activemq-cpp-trunk\src\main\decaf/lang/Thread.h(39)
: see declaration of 'decaf::lang::ThreadProperties'
> 1>        c:\dev_vc9\activemq\activemq-cpp-trunk\src\main\decaf/lang/Pointer.h(357)
: while compiling class template member function 'void decaf::lang::Pointer<T>::onDeleteFunc(T
*)'
> 1>        with
> 1>        [
> 1>            T=decaf::lang::ThreadProperties
> 1>        ]
> 1>        c:\dev_vc9\activemq\activemq-cpp-trunk\src\main\decaf/lang/Thread.h(73)
: see reference to class template instantiation 'decaf::lang::Pointer<T>' being compiled
> 1>        with
> 1>        [
> 1>            T=decaf::lang::ThreadProperties
> 1>        ]
> 2) decaf::internal::RuntimeData
> 1>Thread.cpp
> 1>C:\tools\Microsoft Visual Studio 9.0\VC\include\memory(721) : warning C4150: deletion
of pointer to incomplete type 'decaf::internal::RuntimeData'; no destructor called
> 1>        c:\dev_vc9\activemq\activemq-cpp-trunk\src\main\decaf/internal/DecafRuntime.h(30)
: see declaration of 'decaf::internal::RuntimeData'
> 1>        C:\tools\Microsoft Visual Studio 9.0\VC\include\memory(720) : while compiling
class template member function 'std::auto_ptr<_Ty>::~auto_ptr(void)'
> 1>        with
> 1>        [
> 1>            _Ty=decaf::internal::RuntimeData
> 1>        ]
> 1>        c:\dev_vc9\activemq\activemq-cpp-trunk\src\main\decaf/internal/DecafRuntime.h(38)
: see reference to class template instantiation 'std::auto_ptr<_Ty>' being compiled
> 1>        with
> 1>        [
> 1>            _Ty=decaf::internal::RuntimeData
> 1>        ]
> The warning affects both version 3.1.0 and the trunk.
> I was able to resolve the warning by moving declarations of these two classes from the
cpp files to the corresponding header files. I'm not proficient enough in C++ to provide solution
that keeps these classes encapsulated.
> It is unlikely that these two particular warnings could lead to memory leaks on Win32:
>  - RuntimeData's only member  is managed from outside, destructor is trivial (empty);

>  - ThreadProperties's destructor is trivial (empty) on Win32, and non-trivial on platforms
with pthreads.

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