48 lines
1.5 KiB
C++
48 lines
1.5 KiB
C++
// Licensed to the Apache Software Foundation (ASF) under one
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// or more contributor license agreements. See the NOTICE file
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// distributed with this work for additional information
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// regarding copyright ownership. The ASF licenses this file
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// to you under the Apache License, Version 2.0 (the
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// "License"); you may not use this file except in compliance
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// with the License. You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing,
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// software distributed under the License is distributed on an
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// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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// KIND, either express or implied. See the License for the
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// specific language governing permissions and limitations
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// under the License.
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// This file is copied from
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// https://github.com/apache/impala/blob/branch-2.9.0/be/src/util/mem-range.h
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// and modified by Doris
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#pragma once
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#include <cstdint>
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#include "common/logging.h"
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namespace doris {
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/// Represents a range of memory. This is a convenient alternative to passing around
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/// a separate pointer and length.
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class MemRange {
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public:
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MemRange(uint8_t* data, int64_t len) : data_(data), len_(len) {
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DCHECK_GE(len, 0);
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DCHECK(len == 0 || data != nullptr);
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}
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uint8_t* data() const { return data_; }
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int64_t len() const { return len_; }
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static MemRange null() { return MemRange(nullptr, 0); }
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private:
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uint8_t* data_;
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int64_t len_;
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};
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} // namespace doris
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