Class buffer_allocator

include/boost/compute/allocator/buffer_allocator.hpp:27–113

/// \see buffer
template<class T>
class buffer_allocator
{
public:
    typedef T value_type;
    typedef detail::device_ptr<T> pointer;
    typedef const detail::device_ptr<T> const_pointer;
    typedef std::size_t size_type;
    typedef std::ptrdiff_t difference_type;

    explicit buffer_allocator(const context &context)
        : m_context(context),
          m_mem_flags(buffer::read_write)
    {
    }

    buffer_allocator(const buffer_allocator<T> &other)
        : m_context(other.m_context),
          m_mem_flags(other.m_mem_flags)
    {
    }

    buffer_allocator<T>& operator=(const buffer_allocator<T> &other)
    {
        if(this != &other){
            m_context = other.m_context;
            m_mem_flags = other.m_mem_flags;
        }

        return *this;
    }

    #ifndef BOOST_COMPUTE_NO_RVALUE_REFERENCES
    buffer_allocator(buffer_allocator<T>&& other) BOOST_NOEXCEPT
        : m_context(std::move(other.m_context)),
          m_mem_flags(other.m_mem_flags)
    {
    }

    buffer_allocator<T>& operator=(buffer_allocator<T>&& other) BOOST_NOEXCEPT
    {
        m_context = std::move(other.m_context);
        m_mem_flags = other.m_mem_flags;

        return *this;
    }
    #endif // BOOST_COMPUTE_NO_RVALUE_REFERENCES

    ~buffer_allocator()
    {
    }

    pointer allocate(size_type n)
    {
        buffer buf(m_context, n * sizeof(T), m_mem_flags);
        clRetainMemObject(buf.get());
        return detail::device_ptr<T>(buf);
    }