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/*
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 _framing_SequenceNumber_h
#define _framing_SequenceNumber_h
#include "amqp_types.h"
#include <iosfwd>
#include "qpid/CommonImportExport.h"
namespace qpid {
namespace framing {
class Buffer;
/**
* 4-byte sequence number that 'wraps around'.
*/
class SequenceNumber
{
int32_t value;
public:
QPID_COMMON_EXTERN SequenceNumber();
QPID_COMMON_EXTERN SequenceNumber(uint32_t v);
QPID_COMMON_EXTERN SequenceNumber& operator++();//prefix ++
QPID_COMMON_EXTERN const SequenceNumber operator++(int);//postfix ++
QPID_COMMON_EXTERN SequenceNumber& operator--();//prefix ++
QPID_COMMON_EXTERN bool operator==(const SequenceNumber& other) const;
QPID_COMMON_EXTERN bool operator!=(const SequenceNumber& other) const;
QPID_COMMON_EXTERN bool operator<(const SequenceNumber& other) const;
QPID_COMMON_EXTERN bool operator>(const SequenceNumber& other) const;
QPID_COMMON_EXTERN bool operator<=(const SequenceNumber& other) const;
QPID_COMMON_EXTERN bool operator>=(const SequenceNumber& other) const;
uint32_t getValue() const { return (uint32_t) value; }
operator uint32_t() const { return (uint32_t) value; }
QPID_COMMON_EXTERN friend int32_t operator-(const SequenceNumber& a, const SequenceNumber& b);
void encode(Buffer& buffer) const;
void decode(Buffer& buffer);
uint32_t encodedSize() const;
template <class S> void serialize(S& s) { s(value); }
};
struct Window
{
SequenceNumber hwm;
SequenceNumber lwm;
};
QPID_COMMON_EXTERN std::ostream& operator<<(std::ostream& o, const SequenceNumber& n);
}} // namespace qpid::framing
#endif
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