CudaSparseVectorObj[A] = object
  N*, nnz*: int32
  indices*: ptr int32
  vals*: ptr A

CudaSparseVector[A] = ref CudaSparseVectorObj[A]

CudaSparseMatrixObj[A] = object
  kind*: SparseMatrixKind
  M*, N*, nnz*: int32
  rows*, cols*: ptr int32
  vals*: ptr A

CudaSparseMatrix[A] = ref CudaSparseMatrixObj[A]

proc dealloc[A](v: CudaSparseVector[A])

proc dealloc[A](m: CudaSparseMatrix[A])

proc rowLen(m: CudaSparseMatrix): int32

proc colLen(m: CudaSparseMatrix): int32

proc gpu[A: Scalar](v: SparseVector[A]): CudaSparseVector[A]

proc gpu[A: Scalar](m: SparseMatrix[A]): CudaSparseMatrix[A]

proc cpu[A: Scalar](v: CudaSparseVector[A]): SparseVector[A]

proc cpu[A: Scalar](m: CudaSparseMatrix[A]): SparseMatrix[A]

proc toCsr[A: Scalar](m: CudaSparseMatrix[A]; handle = defaultHandle): CudaSparseMatrix[
    A]

proc toCsc[A: Scalar](m: CudaSparseMatrix[A]; handle = defaultHandle): CudaSparseMatrix[
    A]

proc toCoo[A: Scalar](m: CudaSparseMatrix[A]; handle = defaultHandle): CudaSparseMatrix[
    A]