Expose streams in public round APIs

cpp/include/cudf/round.hpp

@@ -17,6 +17,7 @@
 #pragma once
 
 #include <cudf/column/column.hpp>
+#include <cudf/utilities/default_stream.hpp>
 #include <cudf/utilities/export.hpp>
 #include <cudf/utilities/memory_resource.hpp>
 
@@ -66,6 +67,7 @@ enum class rounding_method : int32_t { HALF_UP, HALF_EVEN };
  * @param decimal_places Number of decimal places to round to (default 0). If negative, this
  * specifies the number of positions to the left of the decimal point.
  * @param method         Rounding method
+ * @param stream         CUDA stream used for device memory operations and kernel launches
  * @param mr             Device memory resource used to allocate the returned column's device memory
  *
  * @return Column with each of the values rounded
@@ -74,6 +76,7 @@ std::unique_ptr<column> round(
   column_view const& input,
   int32_t decimal_places            = 0,
   rounding_method method            = rounding_method::HALF_UP,
+  rmm::cuda_stream_view stream      = cudf::get_default_stream(),
   rmm::device_async_resource_ref mr = cudf::get_current_device_resource_ref());
 
 /** @} */  // end of group

cpp/src/round/round.cu

@@ -358,10 +358,11 @@ std::unique_ptr<column> round(column_view const& input,
 std::unique_ptr<column> round(column_view const& input,
                               int32_t decimal_places,
                               rounding_method method,
+                              rmm::cuda_stream_view stream,
                               rmm::device_async_resource_ref mr)
 {
   CUDF_FUNC_RANGE();
-  return detail::round(input, decimal_places, method, cudf::get_default_stream(), mr);
+  return detail::round(input, decimal_places, method, stream, mr);
 }
 
 }  // namespace cudf

cpp/tests/CMakeLists.txt

@@ -715,6 +715,7 @@ ConfigureTest(STREAM_REDUCTION_TEST streams/reduction_test.cpp STREAM_MODE testi
 ConfigureTest(STREAM_REPLACE_TEST streams/replace_test.cpp STREAM_MODE testing)
 ConfigureTest(STREAM_RESHAPE_TEST streams/reshape_test.cpp STREAM_MODE testing)
 ConfigureTest(STREAM_ROLLING_TEST streams/rolling_test.cpp STREAM_MODE testing)
+ConfigureTest(STREAM_ROUND_TEST streams/round_test.cpp STREAM_MODE testing)
 ConfigureTest(STREAM_SEARCH_TEST streams/search_test.cpp STREAM_MODE testing)
 ConfigureTest(STREAM_SORTING_TEST streams/sorting_test.cpp STREAM_MODE testing)
 ConfigureTest(STREAM_STREAM_COMPACTION_TEST streams/stream_compaction_test.cpp STREAM_MODE testing)

cpp/tests/streams/round_test.cpp

@@ -0,0 +1,40 @@
+/*
+ * Copyright (c) 2024, NVIDIA CORPORATION.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <cudf_test/base_fixture.hpp>
+#include <cudf_test/column_wrapper.hpp>
+#include <cudf_test/default_stream.hpp>
+
+#include <cudf/column/column_view.hpp>
+#include <cudf/round.hpp>
+
+#include <vector>
+
+class RoundTest : public cudf::test::BaseFixture {};
+
+TEST_F(RoundTest, RoundHalfToEven)
+{
+  std::vector<double> vals = {1.729, 17.29, 172.9, 1729};
+  cudf::test::fixed_width_column_wrapper<double> input(vals.begin(), vals.end());
+  cudf::round(input, 0, cudf::rounding_method::HALF_UP, cudf::test::get_default_stream());
+}
+
+TEST_F(RoundTest, RoundHalfAwayFromEven)
+{
+  std::vector<double> vals = {1.5, 2.5, 1.35, 1.45, 15, 25};
+  cudf::test::fixed_width_column_wrapper<double> input(vals.begin(), vals.end());
+  cudf::round(input, -1, cudf::rounding_method::HALF_EVEN, cudf::test::get_default_stream());
+}