Code_Exercises/Managing_Data/solution.cpp

/*
 SYCL Academy (c)

 SYCL Academy is licensed under a Creative Commons
 Attribution-ShareAlike 4.0 International License.

 You should have received a copy of the license along with this
 work.  If not, see <https://creativecommons.org/licenses/by-sa/4.0/>.
*/

#include <sycl/sycl.hpp>

#include "../helpers.hpp"

class scalar_add_usm;
class scalar_add_buff_acc;

void test_usm() {
  int a = 18, b = 24, r = 0;

  auto defaultQueue = sycl::queue{};

  auto dev_A = sycl::malloc_device<int>(1, defaultQueue);
  auto dev_B = sycl::malloc_device<int>(1, defaultQueue);
  auto dev_R = sycl::malloc_device<int>(1, defaultQueue);

  defaultQueue.memcpy(dev_A, &a, 1 * sizeof(int)).wait();
  defaultQueue.memcpy(dev_B, &b, 1 * sizeof(int)).wait();

  defaultQueue.submit([&](sycl::handler& cgh) {
    cgh.single_task<scalar_add_usm>([=] { dev_R[0] = dev_A[0] + dev_B[0]; });
  });
  defaultQueue.wait();

  defaultQueue.memcpy(&r, dev_R, 1 * sizeof(int)).wait();

  sycl::free(dev_A, defaultQueue);
  sycl::free(dev_B, defaultQueue);
  sycl::free(dev_R, defaultQueue);

  SYCLACADEMY_ASSERT_EQUAL(r, 42);
}

void test_buffer() {
  int a = 18, b = 24, r = 0;

  auto defaultQueue = sycl::queue{};

  {
    auto bufA = sycl::buffer{&a, sycl::range{1}};
    auto bufB = sycl::buffer{&b, sycl::range{1}};
    auto bufR = sycl::buffer{&r, sycl::range{1}};

    defaultQueue.submit([&](sycl::handler& cgh) {
      auto accA = sycl::accessor{bufA, cgh, sycl::read_only};
      auto accB = sycl::accessor{bufB, cgh, sycl::read_only};
      auto accR = sycl::accessor{bufR, cgh, sycl::write_only};

      cgh.single_task<scalar_add_buff_acc>(
          [=] { accR[0] = accA[0] + accB[0]; });
    });
  }

  SYCLACADEMY_ASSERT_EQUAL(r, 42);
}

int main() {
  test_usm();
  test_buffer();
}