1  /* Verify that 'acc_map_data' does not copy data to, and 'acc_unmap_data' does
       2     not copy data from the device.  */
       3  
       4  /* { dg-skip-if "" { *-*-* } { "*" } { "-DACC_MEM_SHARED=0" } } */
       5  
       6  #include <stdlib.h>
       7  #include <string.h>
       8  #include <openacc.h>
       9  
      10  int
      11  main ()
      12  {
      13    const int c0 = 9;
      14    const int c1 = 40;
      15    const int c2 = 47;
      16  
      17    const size_t N = 256;
      18  
      19    unsigned char *h = (unsigned char *) malloc (N);
      20  
      21    void *d = acc_malloc (N);
      22  
      23    memset (h, c0, N); // H <- c0
      24    acc_memcpy_to_device (d, h, N); // D <- H = c0
      25  
      26    memset (h, c1, N); // H <- c1
      27    acc_map_data (h, d, N);
      28    for (size_t i = 0; i < N; ++i)
      29      if (h[i] != c1)
      30        abort ();
      31  
      32    acc_memcpy_from_device (h, d, N); // H <- D = c0
      33    for (size_t i = 0; i < N; ++i)
      34      if (h[i] != c0)
      35        abort ();
      36  
      37    memset (h, c2, N); // H <- c2
      38    acc_unmap_data (h);
      39    for (size_t i = 0; i < N; ++i)
      40      if (h[i] != c2)
      41        abort ();
      42  
      43    acc_memcpy_from_device (h, d, N); // H <- D = c0
      44    for (size_t i = 0; i < N; ++i)
      45      if (h[i] != c0)
      46        abort ();
      47  
      48    acc_free (d);
      49  
      50    free (h);
      51  
      52    return 0;
      53  }