#ifndef DATACONTAINER_H
#define DATACONTAINER_H

#include <iostream>
#include <vector>

class Data_Container {
 public:
  Data_Container(int size) : m_data(size) {
    std::cerr << "creating an data container" << std::endl;
  }

  void* get_ptr() { return reinterpret_cast<void*>(&m_data.front() ); }
  int get_size() { return m_data.size(); }
  void set_data_used(int size) { m_data_used = size; }
  int get_data_used() { return m_data_used; }

 private:
  std::vector<char> m_data;
  int m_data_used;
};

#endif




The producer:

for(;;) {
    Data_Container ch(1000);
    ch.set_data_used( producer.produceData( ch.get_ptr() , 1000 /* max size to produce*/ ) );
    buffer.push_front(ch);
}