[Boost-bugs] [Boost C++ Libraries] #10011: segment_manager::find( unique_instance_t* ) fails to compile

Subject: [Boost-bugs] [Boost C++ Libraries] #10011: segment_manager::find( unique_instance_t* ) fails to compile
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2014-05-06 16:31:10

#10011: segment_manager::find( unique_instance_t* ) fails to compile
---------------------------------------------+--------------------------
 Reporter:  Michael Smolensky <smolensky@…>  |      Owner:  igaztanaga
     Type:  Bugs                             |     Status:  new
Milestone:  To Be Determined                 |  Component:  interprocess
  Version:  Boost 1.55.0                     |   Severity:  Problem
 Keywords:                                   |
---------------------------------------------+--------------------------
 When called directly (not from managed_memory_impl),
 segment_manager::find( unique_instance_t* ) fails to compile. Both v 1.53,
 1.55, and  1.55b have this issue.

 The fix would be either:

 - to remove segment_manager::find( unique_instance_t* ) and replace
 find( const CharType* ) with find( char_ptr_holder_t ) or

 - to fix priv_find_impl( unique_instance* ): in line 742 replace name with
 typeid(T).name()
       void *ret = priv_generic_find<char>(name, m_header.m_unique_index,
 table, size, is_intrusive_t(), lock);
 with
       void *ret = priv_generic_find<char>(typeid(T).name(),
 m_header.m_unique_index, table, size, is_intrusive_t(), lock);

 Below is a test program and VC11 error:


 {{{
 #include <boost/interprocess/indexes/flat_map_index.hpp>
 #include <boost/interprocess/mem_algo/simple_seq_fit.hpp>
 #include <boost/interprocess/mapped_region.hpp>
 #include <boost/interprocess/segment_manager.hpp>
 #include <boost/interprocess/shared_memory_object.hpp>
 #include <boost/interprocess/sync/mutex_family.hpp>

 int main()
 {
   using namespace boost::interprocess;

   typedef simple_seq_fit< null_mutex_family >                AllocAlgo;
   typedef segment_manager< char, AllocAlgo, flat_map_index > MemManager;

   shared_memory_object sh_mem( create_only, "test", read_write );
   sh_mem.truncate( 1000 );
   mapped_region mapping( sh_mem, read_write );

   MemManager* mem_mgr = new( mapping.get_address() ) MemManager( 1000 );
   mem_mgr->construct< int >( unique_instance );
   int* p = mem_mgr->find< int >( unique_instance ).first;

   return 0;
 }

 }}}

 1>  main.cpp
 1>c:\dev\exb++.libs\boost\1.55.0b0\common\include\boost\interprocess\segment_manager.hpp(430):
 error C2664: 'std::pair<_Ty1,_Ty2>
 boost::interprocess::segment_manager<CharType,MemoryAlgorithm,IndexType>::priv_find_impl<T>(const
 CharType *,bool)' : cannot convert parameter 1 from 'const
 boost::interprocess::ipcdetail::unique_instance_t *' to 'const char *'
 1>          with
 1>          [
 1>              _Ty1=int *,
 1>              _Ty2=unsigned int,
 1>              CharType=char,
 1>              MemoryAlgorithm=AllocAlgo,
 1>              IndexType=boost::interprocess::flat_map_index,
 1>              T=int
 1>          ]
 1>          Types pointed to are unrelated; conversion requires
 reinterpret_cast, C-style cast or function-style cast
 1>          c:\prj\boostinterprocess\main.cpp(21) : see reference to
 function template instantiation 'std::pair<_Ty1,_Ty2>
 boost::interprocess::segment_manager<CharType,MemoryAlgorithm,IndexType>::find<int>(const
 boost::interprocess::ipcdetail::unique_instance_t *)' being compiled
 1>          with
 1>          [
 1>              _Ty1=int *,
 1>              _Ty2=unsigned int,
 1>              CharType=char,
 1>              MemoryAlgorithm=AllocAlgo,
 1>              IndexType=boost::interprocess::flat_map_index
 1>          ]
 1>          c:\prj\boostinterprocess\main.cpp(21) : see reference to
 function template instantiation 'std::pair<_Ty1,_Ty2>
 boost::interprocess::segment_manager<CharType,MemoryAlgorithm,IndexType>::find<int>(const
 boost::interprocess::ipcdetail::unique_instance_t *)' being compiled
 1>          with
 1>          [
 1>              _Ty1=int *,
 1>              _Ty2=unsigned int,
 1>              CharType=char,
 1>              MemoryAlgorithm=AllocAlgo,
 1>              IndexType=boost::interprocess::flat_map_index
 1>          ]

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/10011>
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