id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
3417	boost::interprocess::managed_shared_memory::belongs_to_segment returns incorrect value.	Lénaïc Huard <lhuard@…>	Ion Gaztañaga	"Hello,

It seems that boost::interprocess::managed_shared_memory::belongs_to_segment implementation is not correct. It returns true for chunks of memory that don't belong to the shared memory segment providing it's lying at a higher address.

Looking at https://svn.boost.org/trac/boost/browser/trunk/boost/interprocess/detail/managed_memory_impl.hpp
shows:

262
   //!Returns true if the address belongs to the managed memory segment
  263
   bool belongs_to_segment (const void *ptr) const
  264
   {  
  265
      return ptr >= this->get_address() && 
  266
             ptr <  (reinterpret_cast<const char*>(ptr) + this->get_size());
  267
   }


It would be more logical to have:

   //!Returns true if the address belongs to the managed memory segment
   bool belongs_to_segment (const void *ptr) const
   {  
      return ptr >= this->get_address() && 
             ptr <  (reinterpret_cast<const char *>(this->get_address()) + this->get_size());
   }

"	Bugs	closed	Boost 1.41.0	interprocess	Boost 1.40.0	Problem	fixed