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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 "Poco/Foundation.h"

#if defined(hpux) || defined(_hpux)

#include "Poco/SharedLibrary_HPUX.h"

#elif defined(POCO_OS_FAMILY_UNIX)

#include "Poco/SharedLibrary_UNIX.h"

#elif defined(POCO_OS_FAMILY_WINDOWS) && defined(POCO_WIN32_UTF8)

#include "Poco/SharedLibrary_WIN32U.h"

#elif defined(POCO_OS_FAMILY_WINDOWS)

#include "Poco/SharedLibrary_WIN32.h"

#elif defined(POCO_OS_FAMILY_VMS)

#include "Poco/SharedLibrary_VMS.h"

#endif

namespace Poco {

class Foundation_API SharedLibrary: private SharedLibraryImpl

        /// The SharedLibrary class dynamically 

        /// loads shared libraries at run-time.

{

public:

        SharedLibrary();

                /// Creates a SharedLibrary object.

        SharedLibrary(const std::string& path);

                /// Creates a SharedLibrary object and loads a library

                /// from the given path.

        virtual ~SharedLibrary();

                /// Destroys the SharedLibrary. The actual library

                /// remains loaded.

        void load(const std::string& path);

                /// Loads a shared library from the given path.

                /// Throws a LibraryAlreadyLoadedException if

                /// a library has already been loaded.

                /// Throws a LibraryLoadException if the library

                /// cannot be loaded.

        void unload();

                /// Unloads a shared library.

        bool isLoaded() const;

                /// Returns true iff a library has been loaded.

        bool hasSymbol(const std::string& name);

                /// Returns true iff the loaded library contains

                /// a symbol with the given name.

        void* getSymbol(const std::string& name);

                /// Returns the address of the symbol with

                /// the given name. For functions, this

                /// is the entry point of the function.

                /// Throws a NotFoundException if the symbol

                /// does not exist.

        const std::string& getPath() const;

                /// Returns the path of the library, as

                /// specified in a call to load() or the 

                /// constructor.

        static std::string suffix();

                /// Returns the platform-specific filename suffix

                /// for shared libraries (including the period).

                /// In debug mode, the suffix also includes a

                /// "d" to specify the debug version of a library.

private:

        SharedLibrary(const SharedLibrary&);

        SharedLibrary& operator = (const SharedLibrary&);

};

} // namespace Poco

#endif // Foundation_SharedLibrary_INCLUDED