barrier.h

/* Copyright (c) 2006-2014, Stefan Eilemann <eile@equalizergraphics.com>
 *                    2011, Cedric Stalder <cedric.stalder@gmail.com>
 *
 * This file is part of Collage <https://github.com/Eyescale/Collage>
 *
 * This library is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License version 2.1 as published
 * by the Free Software Foundation.
 *
 * This library is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
 * details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this library; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#ifndef CO_BARRIER_H
#define CO_BARRIER_H

#include <co/object.h> // base class
#include <co/types.h>

namespace co
{
namespace detail
{
class Barrier;
}

class Barrier : public Object
{
public:
    CO_API Barrier(LocalNodePtr localNode, const uint128_t& masterNodeID,
                   const uint32_t height = 0);

    CO_API Barrier(LocalNodePtr localNode, const ObjectVersion& barrier);

    CO_API virtual ~Barrier();

    bool isGood() const { return isAttached(); }
    CO_API void setHeight(const uint32_t height);

    CO_API void increase();

    CO_API uint32_t getHeight() const;

    CO_API bool enter(const uint32_t timeout = LB_TIMEOUT_INDEFINITE);

protected:
    void attach(const uint128_t& id, const uint32_t instanceID) override;
    ChangeType getChangeType() const override { return DELTA; }
    void getInstanceData(DataOStream& os) override;
    void applyInstanceData(DataIStream& is) override;
    void pack(DataOStream& os) override;
    void unpack(DataIStream& is) override;

private:
    detail::Barrier* const _impl;

    void _cleanup(const uint64_t time);
    void _sendNotify(const uint128_t& version, NodePtr node);

    /* The command handlers. */
    bool _cmdEnter(ICommand& command);
    bool _cmdEnterReply(ICommand& command);

    LB_TS_VAR(_thread);
};
}

#endif // CO_BARRIER_H