// Copyright 2023 PingCAP, Inc.
//
// Licensed 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 <boost/noncopyable.hpp>
#include <memory>
#include <string>


namespace DB
{
/** Allows you to open a dynamic library and get a pointer to a function from it.
  */
class SharedLibrary : private boost::noncopyable
{
public:
    explicit SharedLibrary(const std::string & path);

    ~SharedLibrary();

    template <typename Func>
    Func get(const std::string & name)
    {
        return reinterpret_cast<Func>(getImpl(name));
    }
    template <typename Func>
    Func tryGet(const std::string & name)
    {
        return reinterpret_cast<Func>(getImpl(name, true));
    }

private:
    void * getImpl(const std::string & name, bool no_throw = false);

    void * handle = nullptr;
};

using SharedLibraryPtr = std::shared_ptr<SharedLibrary>;

} // namespace DB