shared_object.h

//
//  Copyright (C) 2009-2012 Artyom Beilis (Tonkikh)
//
//  Distributed under the Boost Software License, Version 1.0. (See
//  accompanying file LICENSE_1_0.txt or copy at
//  http://www.boost.org/LICENSE_1_0.txt)
//
#ifndef BOOSTER_SHARED_OBJECT_H
#define BOOSTER_SHARED_OBJECT_H

#include <booster/config.h>
#include <booster/noncopyable.h>
#include <booster/hold_ptr.h>
#include <booster/backtrace.h>
#include <booster/cstdint.h>
#include <string>

namespace booster {
        class BOOSTER_API shared_object : public booster::noncopyable {
        public:
                static const int load_lazy      = 1; 
                static const int load_now       = 2; 
                static const int load_global    = 4; 
                static const int load_local     = 8; 
                shared_object();
                ~shared_object();
                shared_object(std::string const &file_name,int flags);
                shared_object(std::string const &file_name);
                bool is_open() const;
                bool open(std::string const &file_name);
                bool open(std::string const &file_name,std::string &error_message);
                bool open(std::string const &file_name,int flags);
                bool open(std::string const &file_name,std::string &error_message,int flags);
                void close();

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

                template<typename T>
                void symbol(T &s,std::string const &name) const
                {
                        void *p = resolve_symbol(name);
                        if(!p) {
                                throw booster::runtime_error("booster::shared_object:failed to resolve symbol:" + name);
                        }
                        s = reinterpret_cast<T>(reinterpret_cast<size_t>(p));
                }

                static std::string name(std::string const &module);
                static std::string name(std::string const &module,std::string const &soversion);
        private:
                struct data;
                hold_ptr<data> d;
        };
}

#endif