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#pragma clang system_header
// 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 "contrib/libs/apache/arrow_next/cpp/src/arrow/util/macros.h"
namespace arrow20 {
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 arrow20
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