Add a copy kernel

src/CUDAStream.cu

@@ -1,10 +1,17 @@
 
 #include "CUDAStream.h"
 
+template <typename T>
+__global__ void copy_kernel(const T * a, T * c)
+{
+  const int i = blockDim.x * blockIdx.x + threadIdx.x;
+  c[i] = a[i];
+}
+
 template <class T>
 void CUDAStream<T>::copy()
 {
-  return;
+  copy<<<1024, 1024>>>(a, c);
 }
 
 template <class T>

src/CUDAStream.h

@@ -10,4 +10,11 @@ class CUDAStream : public Stream<T>
     void add();
     void mul();
     void triad();
+
+  private:
+    // Device side pointers to arrays
+    T *d_a;
+    T *d_b;
+    T *d_c;
+
 };