globalRngGen.hpp

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#ifndef _GLOBAL_RANDOM_GENERATOR_HPP_INCLUDED
#define _GLOBAL_RANDOM_GENERATOR_HPP_INCLUDED

#include <string>
#include <system/randomGenerator.hpp>

#if defined( _MSC_VER )
        #define WOLFRAME_EXPORT __declspec( dllexport )
#else
        #define WOLFRAME_EXPORT
#endif

namespace _Wolframe     {

class GlobalRandomGenerator : public crypto::RandomGenerator
{
public:
        ~GlobalRandomGenerator();

        WOLFRAME_EXPORT static GlobalRandomGenerator& instance();
        WOLFRAME_EXPORT static GlobalRandomGenerator& instance( const std::string &rndDev );

        WOLFRAME_EXPORT void device( const std::string &rndDev );
        WOLFRAME_EXPORT const std::string& device() const;
        WOLFRAME_EXPORT unsigned random() const;
        WOLFRAME_EXPORT void generate( unsigned char* buffer, size_t bytes ) const;

protected:
        GlobalRandomGenerator();
        GlobalRandomGenerator( const std::string &rndDev );

private:
        // make it noncopyable
        GlobalRandomGenerator( const GlobalRandomGenerator& );
        const GlobalRandomGenerator& operator= ( const GlobalRandomGenerator& );

        // Real object data
        std::string     m_device;               
};

} // namespace _Wolframe

#endif // _GLOBAL_RANDOM_GENERATOR_HPP_INCLUDED