Atomic printer sketch for threaded C++11

printer.hh

#pragma once
#ifndef PRINTER_HH
#define PRINTER_HH

#include <string>
#include <sstream>

namespace {

/*
 * @brief prints objects atomically.
 */
class Printer {
public:
    explicit Printer();
    ~Printer();
    void print(const std::string& str);
private:
    Mutex m_;
};

/*
 * @brief appends list of items into given stringstream.
 */
void buffer(const std::stringstream&) {}
template <typename H, typename... T>
void buffer(std::stringstream& pbuffer, H head, T... tail) {
    pbuffer << head;
    buffer(pbuffer, tail...);
}
}  // anonymous namespace

/**
 * @brief print prints a list of objects.
 * 
 * Objects only need to have operator << for ostream defined.
 */
void print(const std::string& str);
template <typename... L>
void print(L... list) {
    std::stringstream pbuffer;
    buffer(pbuffer, list...);
    print(pbuffer.str());
}

#endif  // PRINTER_HH