// 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.

// This file is copied from

#pragma once

#include <cstdint>

#include <string>

#include "runtime/memory/mem_counter.h"

namespace doris {

/*

 * can be consumed manually by consume()/release(), or put into SCOPED_CONSUME_MEM_TRACKER,

 * which will automatically track all memory usage of the code segment where it is located.

 *

 * This class is thread-safe.

*/

class MemTracker final {

public:

    MemTracker() = default;

    MemTracker(std::string label) : _label(std::move(label)) {};

    ~MemTracker() = default;

    void consume(int64_t bytes) { _mem_counter.add(bytes); }

    void consume_no_update_peak(int64_t bytes) { _mem_counter.add_no_update_peak(bytes); }

    void release(int64_t bytes) { _mem_counter.sub(bytes); }

    void set_consumption(int64_t bytes) { _mem_counter.set(bytes); }

    int64_t consumption() const { return _mem_counter.current_value(); }

    int64_t peak_consumption() const { return _mem_counter.peak_value(); }

    const std::string& label() const { return _label; }

    std::string log_usage() const {

        return fmt::format("MemTracker name={}, Used={}({} B), Peak={}({} B)", _label,

                           PrettyPrinter::print_bytes(consumption()), consumption(),

                           PrettyPrinter::print_bytes(peak_consumption()), peak_consumption());

    }

private:

    MemCounter _mem_counter;

    std::string _label {"None"};

};

} // namespace doris