[Boost-users] [1.34.0][serialization][iostreams] Memory leaks

6 Jul 2007

      The attached code works fine with version 1.33.1 but generates memory 
leaks with 1.34.0.

Not sure it's a bug in Serialization or Iostreams.

Compiler: Visual Studio 2005 SP1

Thanks,
Ying
http://www.lw-works.com - Clipboard Recorder

#include <cstdlib>

//#include <boost/array.hpp>
#include <boost/archive/text_oarchive.hpp>
#include <boost/archive/text_iarchive.hpp>
//#include <boost/serialization/deque.hpp>

#include <boost/iostreams/categories.hpp>
#include <boost/iostreams/filter/zlib.hpp>
#include <boost/iostreams/filtering_stream.hpp>
#include <boost/iostreams/concepts.hpp>  // sink, source
#include <boost/iostreams/stream.hpp>
#include <vector>

#if _MSC_VER
#	ifdef _DEBUG
#		include <crtdbg.h>
#		ifndef new
#			define new new(_NORMAL_BLOCK, __FILE__, __LINE__)
#		endif
#		ifndef malloc
#			define malloc(size) _malloc_dbg(size, _NORMAL_BLOCK, __FILE__, __LINE__) 
#		endif
#	endif
#endif

namespace cmn{ namespace iostreams{
    template<typename Container>
    class container_sink {
    public:
        typedef typename Container::value_type  char_type;
        typedef boost::iostreams::sink_tag      category;
        container_sink(Container& container) : container_(container) { }
        std::streamsize write(const char_type* s, std::streamsize n)
        {
            container_.insert(container_.end(), s, s + n);
            return n;
        }
        Container& container() { return container_; }
    private:
        Container& container_;
    }; // class container_sink
}} // namespace cmn::iostreams
namespace cmn{ namespace iostreams{
    template<typename Container>
    class container_source {
    public:
        typedef typename Container::value_type  char_type;
        typedef boost::iostreams::source_tag    category;
        container_source(Container& container) 
            : container_(container), pos_(0)
            { }
        std::streamsize read(char_type* s, std::streamsize n)
        {
            using namespace std;
            streamsize amt = static_cast<streamsize>(container_.size() - pos_);
            streamsize result = (min)(n, amt);
            if (result != 0) {
                std::copy( container_.begin() + pos_, 
                        container_.begin() + pos_ + result, 
                        s );
                pos_ += result;
                return result;
            } else {
                return -1; // EOF
            }
        }
        Container& container() { return container_; }
    private:
        typedef typename Container::size_type   size_type;
        Container&  container_;
        size_type   pos_;
    }; // class container_source

}} // namespace cmn::iostreams

namespace cmn{
    template<class T, class Container> bool compress_object(Container& v, const T& o)
    {
        typedef cmn::iostreams::container_sink<Container> sink;
        boost::iostreams::stream<sink> outs(v);
        boost::iostreams::filtering_stream<boost::iostreams::output> fs;
        fs.push(boost::iostreams::zlib_compressor());
        fs.push(outs);
        boost::archive::text_oarchive oa(fs);
        oa << o;

        return true;
    }
    template<class T, class Container> bool decompress_object(const Container& v, T& o)
    {
        //ASSERT(v.size());
        if(!v.size())
            return false;
        typedef cmn::iostreams::container_source<const Container> source;
        boost::iostreams::stream<source> ins(v);
        boost::iostreams::filtering_stream<boost::iostreams::input> fs;
        fs.push(boost::iostreams::zlib_decompressor());
        fs.push(ins);
        boost::archive::text_iarchive ia(fs);
        ia >> o;
        return true;
    }
} // namespace cmn

int main()
{
    _CrtSetDbgFlag(_CRTDBG_ALLOC_MEM_DF | /*_CRTDBG_CHECK_ALWAYS_DF | _CRTDBG_CHECK_CRT_DF | */_CRTDBG_LEAK_CHECK_DF);

    std::string data;
    std::vector<char> buf;
    cmn::compress_object(buf, data);
    cmn::decompress_object(buf, data);

	return 0;
}