ClickHouse/programs/library-bridge/SharedLibrary.h

#pragma once

#include <dlfcn.h>
#include <memory>
#include <string>
#include <boost/noncopyable.hpp>


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(std::string_view path, int flags = RTLD_LAZY);

    ~SharedLibrary();

    template <typename Func>
    Func get(std::string_view name)
    {
        return reinterpret_cast<Func>(getImpl(name));
    }

    template <typename Func>
    Func tryGet(std::string_view name)
    {
        return reinterpret_cast<Func>(getImpl(name, true));
    }

private:
    void * getImpl(std::string_view name, bool no_throw = false);

    void * handle = nullptr;
};

using SharedLibraryPtr = std::shared_ptr<SharedLibrary>;

}