Runtime

Header	Content	CCCL Availability	CUDA Toolkit Availability
devices	A range of all available CUDA devices	CCCL 3.1.0	CUDA 13.1
device_ref	A non-owning representation of a CUDA device	CCCL 3.1.0	CUDA 13.1
arch_traits	Per-architecture trait accessors	CCCL 3.1.0	CUDA 13.1
stream_ref	A non-owning wrapper around a cudaStream_t	CCCL 2.2.0	CUDA 12.3
stream	An owning wrapper around a cudaStream_t	CCCL 3.1.0	CUDA 13.1
event_ref	A non-owning wrapper around a cudaEvent_t	CCCL 3.1.0	CUDA 13.1
event	An owning wrapper around a cudaEvent_t (timing disabled)	CCCL 3.1.0	CUDA 13.1
timed_event	An owning wrapper around a cudaEvent_t with timing enabled and elapsed-time queries	CCCL 3.1.0	CUDA 13.1
copy_bytes	Byte-wise copy into a cuda::stream_ref for cuda::std::span/cuda::std::mdspan sources and destinations	CCCL 3.1.0	CUDA 13.1
fill_bytes	Byte-wise fill into a cuda::stream_ref for cuda::std::span/cuda::std::mdspan destinations	CCCL 3.1.0	CUDA 13.1
Memory Resources	cuda::mr interfaces (resources, wrappers, properties) usable with streams	CCCL 2.2.0 (experimental), CCCL 3.1.0 (stable)	CUDA 12.3 (experimental), CUDA 13.1 (stable)