Here are the classes, structs, unions and interfaces with brief descriptions:

Nrmm	The top-level namespace containing all RMM functionality
Nmr	Memory Resource classes and adaptors
Caligned_resource_adaptor	Resource that adapts an upstream resource to allocate memory with a specified alignment
Carena_memory_resource	A suballocator that emphasizes fragmentation avoidance and scalable concurrency support
Cbinning_memory_resource	Allocates memory from upstream resources associated with bin sizes
Ccallback_memory_resource	A device memory resource that uses the provided callbacks for memory allocation and deallocation
Ccuda_async_managed_memory_resource	Memory resource that uses cudaMallocFromPoolAsync/cudaFreeFromPoolAsync with a managed memory pool for allocation/deallocation
Ccuda_async_memory_resource	Memory resource that uses cudaMallocAsync/cudaFreeAsync for allocation/deallocation
Ccuda_async_view_memory_resource	Memory resource that uses cudaMallocAsync/cudaFreeAsync for allocation/deallocation
Ccuda_memory_resource	Memory resource that uses cudaMalloc/Free for allocation/deallocation
Cfailure_callback_resource_adaptor	A device memory resource that calls a callback function when allocations throw a specified exception type
Cfixed_size_memory_resource	A memory resource which allocates memory blocks of a single fixed size
Climiting_resource_adaptor	Resource that uses an upstream resource to allocate memory and limits the total allocations possible
Clogging_resource_adaptor	Resource that uses an upstream resource to allocate memory and logs information about the requested allocation/deallocations
Cmanaged_memory_resource	Memory resource that uses cudaMallocManaged/Free for allocation/deallocation
Cpinned_host_memory_resource	Memory resource class for allocating pinned host memory
Cpolymorphic_allocator	A stream ordered Allocator using a device_async_resource_ref to satisfy (de)allocations
Cpool_memory_resource	A coalescing best-fit suballocator which uses a pool of memory allocated from an upstream memory_resource
Cprefetch_resource_adaptor	Resource that prefetches all memory allocations
Csam_headroom_memory_resource	Resource that uses system memory resource to allocate memory with a headroom
Cstatistics_resource_adaptor	Resource that uses an upstream resource to allocate memory and tracks allocation statistics (current, peak, total bytes and allocation counts)
Cstream_allocator_adaptor	Adapts a stream ordered allocator to provide a standard Allocator interface
Crebind	Rebinds the allocator to the specified type
Csystem_memory_resource	Memory resource that uses malloc/free for allocation/deallocation
Cthread_safe_resource_adaptor	Resource that adapts an upstream resource to be thread safe
Cthrust_allocator	An allocator compatible with Thrust containers and algorithms using a device_async_resource_ref for memory (de)allocation
Crebind	Provides the type of a thrust_allocator instantiated with another type
Ctracking_resource_adaptor	Resource that uses an upstream resource to allocate memory and tracks allocations
Cbad_alloc	Exception thrown when an RMM allocation fails
Ccuda_device_id	Strong type for a CUDA device identifier
Ccuda_error	Exception thrown when a CUDA error is encountered
Ccuda_set_device_raii	RAII class that sets the current CUDA device to the specified device on construction and restores the previous device on destruction
Ccuda_stream	Owning wrapper for a CUDA stream
Ccuda_stream_pool	A pool of CUDA streams
Cdevice_buffer	RAII construct for device memory allocation
Cdevice_scalar	Container for a single object of type T in device memory
Cdevice_uvector	An uninitialized vector of elements in device memory
Cexec_policy	Helper class usable as a Thrust CUDA execution policy that uses RMM for temporary memory allocation on the specified stream
Cexec_policy_nosync	Helper class usable as a Thrust CUDA execution policy that uses RMM for temporary memory allocation on the specified stream and which allows the Thrust backend to skip stream synchronizations that are not required for correctness
Cinvalid_argument	Exception thrown when an argument to a function is invalid
Clogic_error	Exception thrown when logical precondition is violated
Cout_of_memory	Exception thrown when RMM runs out of memory
Cout_of_range	Exception thrown when attempting to access outside of a defined range