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.venv/Lib/site-packages/pyarrow/include/arrow/util/memory.h

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+// 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.
+
+#pragma once
+
+#include <cstdint>
+#include <memory>
+
+#include "arrow/util/macros.h"
+
+namespace arrow {
+namespace internal {
+
+// A helper function for doing memcpy with multiple threads. This is required
+// to saturate the memory bandwidth of modern cpus.
+void parallel_memcopy(uint8_t* dst, const uint8_t* src, int64_t nbytes,
+                      uintptr_t block_size, int num_threads);
+
+// A helper function for checking if two wrapped objects implementing `Equals`
+// are equal.
+template <typename T>
+bool SharedPtrEquals(const std::shared_ptr<T>& left, const std::shared_ptr<T>& right) {
+  if (left == right) return true;
+  if (left == NULLPTR || right == NULLPTR) return false;
+  return left->Equals(*right);
+}
+
+}  // namespace internal
+}  // namespace arrow