c++ - Memory-leaks with ICreateDevEnum, IEnumMoniker, BindToStorage -


when executing following code, extracted msdn, there serious memory leaks. using mingw 5.3 (same leaks mingw 4.8) , windows 7.

did forget call release() or method prevent leak ?

#include <dshow.h> #include <iostream> #include <mmdeviceapi.h> #include <uuids.h>  void print_device() {   // create system device enumerator.   hresult hr;   icreatedevenum *psysdevenum = null;   hr = cocreateinstance(clsid_systemdeviceenum, null, clsctx_inproc_server,       iid_icreatedevenum, (void **)&psysdevenum);   if (failed(hr))   {       return;   }    // obtain class enumerator video compressor category.   ienummoniker *penumcat = null;   hr = psysdevenum->createclassenumerator(clsid_videocompressorcategory, &penumcat, 0);    if (hr == s_ok)   {       // enumerate monikers.       imoniker *pmoniker = null;       ulong cfetched;       while(penumcat->next(1, &pmoniker, &cfetched) == s_ok)       {           ipropertybag *ppropbag;           hr = pmoniker->bindtostorage(0, 0, iid_ipropertybag,               (void **)&ppropbag);           if (succeeded(hr))           {               // retrieve filter's friendly name, following:               variant varname;               variantinit(&varname);               hr = ppropbag->read(l"friendlyname", &varname, 0);               if (succeeded(hr))               {                 std::wcout << varname.bstrval << '\n';               }               variantclear(&varname);           }           pmoniker->release();       }       penumcat->release();   }   psysdevenum->release(); }  int main() {   // initializes   coinitialize( null );    // loop test leak       while( true ) {     print_device();   } }


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