booster/aio/reactor.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_AIO_REACTOR_H
#define BOOSTER_AIO_REACTOR_H
#include <booster/config.h>
#include <booster/aio/types.h>
#include <memory>
#include <string>
namespace booster {
namespace aio {

        class reactor_impl;

        class BOOSTER_API reactor : public io_events {
                reactor(reactor const &);
                void operator=(reactor const &);
        public:

                static const int use_default    = 0; //< Best polling device available on the OS
                static const int use_select     = 1; //< select() API, default on Windows
                static const int use_poll       = 2; //< poll() API default on POSIX platforms without better polling support
                static const int use_epoll      = 3; //< epoll() available and default on Linux
                static const int use_dev_poll   = 4; //< /dev/poll available and default on Solaris and HP-UX
                static const int use_kqueue     = 5; //< kqueue available and default on BSD and Mac OS X.
                static const int use_max        = use_kqueue;  //< Maximal number

                struct event {
                        native_type fd; //< A descriptor that event occurred on
                        int events;     //< a bit mask of events \see io_events
                };


                reactor(int hint = use_default);
                ~reactor();

                void select(native_type fd,int flags);
                void select(native_type fd,int flags,system::error_code &e);
                void remove(native_type fd)
                {
                        select(fd,0);
                }
                void remove(native_type fd,system::error_code &e)
                {
                        select(fd,0,e);
                }
                
                int poll(event *events,int n,int timeout);
                int poll(event *events,int n,int timeout,system::error_code &e);

                std::string name() const;
        private:
                std::auto_ptr<reactor_impl> impl_;
        };
} // aio
} // booster


#endif