Struct MappedBuffer 

pub struct MappedBuffer<T: Copy> { /* private fields */ }

A host-allocated, device-mapped (zero-copy) memory buffer.

The host memory is accessible from both CPU code and GPU kernels. GPU accesses traverse the PCIe bus, making this suitable for small or infrequently-accessed data where the overhead of explicit transfers is not justified.

Status

This type is a placeholder. The allocation method currently returns CudaError::NotSupported.

TODO: Add cu_mem_host_alloc (with CU_MEMHOSTALLOC_DEVICEMAP) and cu_mem_host_get_device_pointer to DriverApi.

Implementations

impl<T: Copy> MappedBuffer<T>

pub fn alloc(_n: usize) -> CudaResult<Self>

Allocates a zero-copy host-mapped buffer of n elements.

Errors

Currently always returns CudaError::NotSupported because the required driver function pointers are not yet loaded.

TODO: Implement once cu_mem_host_alloc and cu_mem_host_get_device_pointer are available in DriverApi.

pub fn len(&self) -> usize

Returns the number of T elements in this buffer.

pub fn is_empty(&self) -> bool

Returns true if the buffer contains zero elements.

pub fn as_device_ptr(&self) -> CUdeviceptr

Returns the raw device pointer for use in kernel parameters.

pub fn as_host_ptr(&self) -> *const T

Returns a raw const pointer to the host-side data.

Trait Implementations

impl<T: Copy> Drop for MappedBuffer<T>

fn drop(&mut self)

Executes the destructor for this type.

impl<T: Copy + Send> Send for MappedBuffer<T>

impl<T: Copy + Sync> Sync for MappedBuffer<T>