DeviceBuffer

RAII GPU memory management.

Overview

DeviceBuffer provides automatic GPU memory allocation and deallocation using RAII pattern.

Constructor

explicit DeviceBuffer(size_t size);

Allocates size bytes on GPU.

Destructor

~DeviceBuffer();

Automatically calls cudaFree().

Methods

data

void* data();
const void* data() const;

Returns pointer to GPU memory.

size

size_t size() const;

Returns allocated size in bytes.

Move Semantics

DeviceBuffer buf1(1024);
DeviceBuffer buf2 = std::move(buf1);  // buf1 is now empty

Copy is disabled to prevent accidental deep copies.

Example

// Allocate GPU memory
DeviceBuffer buffer(1920 * 1080 * 3);  // 4K RGB image

// Use with CUDA kernel
myKernel<<<grid, block>>>(buffer.data());

// Memory automatically freed when buffer goes out of scope

Internal Implementation

class DeviceBuffer {
public:
    explicit DeviceBuffer(size_t size);
    ~DeviceBuffer();
    
    DeviceBuffer(DeviceBuffer&& other) noexcept;
    DeviceBuffer& operator=(DeviceBuffer&& other) noexcept;
    
    DeviceBuffer(const DeviceBuffer&) = delete;
    DeviceBuffer& operator=(const DeviceBuffer&) = delete;
    
private:
    void* d_data_;
    size_t size_;
};

See Also

• GpuImage - Image container using DeviceBuffer