stopandwait.h

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/*
 * stopandwait.h
 *
 * Copyright (C) 2011 IBR, TU Braunschweig
 *
 * Written-by: Johannes Morgenroth <morgenroth@ibr.cs.tu-bs.de>
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */

#ifndef STOPANDWAIT_H_
#define STOPANDWAIT_H_

#include <ibrcommon/thread/Conditional.h>
#include <stdint.h>

namespace ibrcommon
{
        class stopandwait
        {
        public:
                stopandwait(const size_t timeout, const size_t maxretry = 0);
                virtual ~stopandwait();

                void setTimeout(size_t timeout);

        protected:
                int __send(const char *buffer, const size_t length);
                int __recv(char *buffer, size_t &length);

                virtual int __send_impl(const char *buffer, const size_t length)  = 0;
                virtual int __recv_impl(char *buffer, size_t &length) = 0;

        private:
                size_t _maxretry;
                uint8_t _out_seqno;
                uint8_t _in_seqno;
                uint8_t _ack_seqno;

                unsigned int _count;
                size_t _timeout;
                ibrcommon::Conditional _ack_cond;
        };
}

#endif /* STOPANDWAIT_H_ */