[GitHub] [arrow] fsaintjacques commented on a change in pull request #7302: ARROW-8978: [C++][CI] Fix valgrind warnings in cpp-conda-valgrind nightly build

[GitBox <gi...@apache.org>]

fsaintjacques commented on a change in pull request #7302:
URL: https://github.com/apache/arrow/pull/7302#discussion_r432645169



##########
File path: cpp/src/arrow/compute/util_internal.h
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@@ -0,0 +1,35 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you 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 "arrow/buffer.h"
+
+namespace arrow {
+namespace compute {
+namespace internal {
+
+/// \brief Set data at byte offset in buffer to 0. To help with valgrind issues
+static inline void ZeroByte(Buffer* buffer, int64_t byte_index) {

Review comment:
       Fails to [compile](https://github.com/apache/arrow/pull/7302/checks?check_run_id=721039111#step:7:455) on MSVC




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