rocm-systems/tests/src/hipDrvMemcpy.cpp

#include<iostream>
#include<hip/hip_runtime.h>
#include<hip/hip_runtime_api.h>

#define LEN 1024
#define SIZE LEN<<2

int main(){
  int *A, *B;
  hipDeviceptr_t Ad, Bd;
  A = new int[LEN];
  B = new int[LEN];

  for(int i=0;i<LEN;i++){
    A[i] = i;
  }

  hipMalloc((void**)&Ad, SIZE);
  hipMalloc((void**)&Bd, SIZE);

  hipMemcpyHtoD(Ad, A, SIZE);
  hipMemcpyDtoD(Bd, Ad, SIZE);
  hipMemcpyDtoH(B, Bd, SIZE);

  for(int i=0;i<16;i++){
    std::cout<<A[i]<<" "<<B[i]<<std::endl;
  }

  int *Ah, *Bh;
  hipHostMalloc(&Ah, SIZE, 0);
  hipHostMalloc(&Bh, SIZE, 0);
  memcpy(Ah, A, SIZE);
  hipStream_t stream;
  hipStreamCreate(&stream);

  hipMemcpyHtoDAsync(Ad, Ah, SIZE, stream);
  hipStreamSynchronize(stream);
  hipMemcpyDtoDAsync(Bd, Ad, SIZE, stream);
  hipStreamSynchronize(stream);
  hipMemcpyDtoHAsync(Bh, Bd, SIZE, stream);
  hipStreamSynchronize(stream);

  std::cout<<Ah[10]<<" "<<Bh[10]<<std::endl;
}