request_with_state.h

/***************************************************************************
 * include/stxxl/bits/io/request_with_state.h
 *
 * Part of the STXXL. See http://stxxl.sourceforge.net
 *
 * Copyright (C) 2008 Andreas Beckmann <[email protected]>
 * Copyright (C) 2009 Johannes Singler <[email protected]>
 *
 * 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 STXXL_IO__REQUEST_WITH_STATE_H_
#define STXXL_IO__REQUEST_WITH_STATE_H_

#include <stxxl/bits/common/state.h>
#include <stxxl/bits/io/request.h>
#include <stxxl/bits/io/request_with_waiters.h>


__STXXL_BEGIN_NAMESPACE


class request_with_state : public request, public request_with_waiters
{
protected:
 enum request_state { OP = 0, DONE = 1, READY2DIE = 2 };

 state<request_state> _state;

protected:
 request_with_state(
 const completion_handler & on_cmpl,
 file * f,
 void * buf,
 offset_type off,
 size_type b,
 request_type t) :
 request(on_cmpl, f, buf, off, b, t),
 _state(OP)
 { }

public:
 virtual ~request_with_state();
 void wait(bool measure_time = true);
 bool poll();
 bool cancel();
};


__STXXL_END_NAMESPACE

#endif // !STXXL_IO__REQUEST_WITH_STATE_H_
// vim: et:ts=4:sw=4