shared_library.h

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//
// SharedLibrary.h
//
// $Id: //poco/1.3/Foundation/include/Poco/SharedLibrary.h#1 $
//
// Library: Foundation
// Package: SharedLibrary
// Module:  SharedLibrary
//
// Definition of the SharedLibrary class.
//
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// Permission is hereby granted, free of charge, to any person or organization
// obtaining a copy of the software and accompanying documentation covered by
// this license (the "Software") to use, reproduce, display, distribute,
// execute, and transmit the Software, and to prepare derivative works of the
// Software, and to permit third-parties to whom the Software is furnished to
// do so, all subject to the following:
//
// The copyright notices in the Software and this entire statement, including
// the above license grant, this restriction and the following disclaimer,
// must be included in all copies of the Software, in whole or in part, and
// all derivative works of the Software, unless such copies or derivative
// works are solely in the form of machine-executable object code generated by
// a source language processor.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
//
 
#ifndef Foundation_SharedLibrary_INCLUDED
#define Foundation_SharedLibrary_INCLUDED
 
#include "platform.hpp"
#include <string>
#include <mutex>
 
namespace BT
{
class SharedLibrary
{
public:
  enum Flags
  {
    SHLIB_GLOBAL = 1,
 
    SHLIB_LOCAL = 2
  };
 
  SharedLibrary();
 
  SharedLibrary(const std::string& path, int flags = 0);
 
  virtual ~SharedLibrary() = default;
 
  void load(const std::string& path, int flags = 0);
 
  void unload();
 
  bool isLoaded() const;
 
  bool hasSymbol(const std::string& name);
 
  void* getSymbol(const std::string& name);
 
  const std::string& getPath() const;
 
  static std::string prefix();
 
  static std::string suffix();
 
  static std::string getOSName(const std::string& name);
 
private:
  SharedLibrary(const SharedLibrary&);
  SharedLibrary& operator=(const SharedLibrary&);
 
  void* findSymbol(const std::string& name);
 
  std::string _path;
  void* _handle = nullptr;
  std::mutex _mutex;
};
 
}  // namespace BT
 
#endif  // Foundation_SharedLibrary_INCLUDED