Re: [Boost-users] managed_shared_memory memory leak(?)

Subject: Re: [Boost-users] managed_shared_memory memory leak(?)
From: Ion Gaztañaga (igaztanaga_at_[hidden])
Date: 2012-04-26 12:51:44

El 25/04/2012 12:35, Michael Herrmann escribió:
> Hello everyone,
>
> the following trivial example highlights a memory leak according to MSVC
> 2010. Does anybody know why this is and how it can be avoided?

Interprocess creates some singletons for expensive operations and you 
are testing for leaks before those singletons are destroyed. The 
following test, in visual 10:

     #define _CRTDBG_MAP_ALLOC
     #include <stdlib.h>
     #include <crtdbg.h>

     #include <boost/interprocess/managed_shared_memory.hpp>

     static struct leak_detector
     {
         ~leak_detector()
         {  _CrtDumpMemoryLeaks(); }
     } leak_detector_object;

     int main(int argc, char *argv[])
     {
         _CrtDumpMemoryLeaks();
         return 0;
     }

The CrtDumpMemoryLeaks() call in main will be executed first and will 
report leaks (singletons are not still destroyed). The second 
_CrtDumpMemoryLeaks() called from the static variable will be called 
after interprocess singletons are destroyed (it's compiler dependent, 
but in my configuration the static variable is destroyed after 
interprocess singletons are destroyed) and reports no leaks.

Ion