saving an unknown object of POD in binary format

[ar115]

I have an unkown object which is guaranteed to contain only POD's as
its member data.
Do the template functions below work correctly for saving and retrieval of its data from
a binary file?

template< class T >
inline void
write_binary_data( const T& _t,  std::ofstream& out )
{
	out.write( (char*)(&_t), sizeof(T) );
}

template< class T >
inline void
read_binary_data( T& _t,  std::ifstream& in )
{
	in.read( (char*)(&_t), sizeof(T) );
}