// PDU counter class.// Copyright (C) 2008-2010 Malcolm Crowe, Lex Li, and other contributors.// // Permission is hereby granted, free of charge, to any person obtaining a copy of this// software and associated documentation files (the "Software"), to deal in the Software// without restriction, including without limitation the rights to use, copy, modify, merge,// publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons// to whom the Software is furnished to do so, subject to the following conditions:// // The above copyright notice and this permission notice shall be included in all copies or// substantial portions of the Software.// // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE// FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER// DEALINGS IN THE SOFTWARE.using System;namespace GSF.Net.Snmp.Messaging{ /// <summary> /// A counter that generates ID. /// </summary> /// <remarks>The request ID is used to identifier sessions.</remarks> public sealed class NumberGenerator { /// <summary> /// Initializes a new instance of the <see cref="NumberGenerator"/> class. /// </summary> /// <param name="min">The min.</param> /// <param name="max">The max.</param> public NumberGenerator(int min, int max) { _min = min; _max = max; _salt = new Random().Next(_min, _max); } /// <summary> /// Returns next ID. This method is thread-safe within this instance of NumberGenerator. /// </summary> public int NextId { get { lock (_root) { if (_salt == _max) { _salt = _min; } else { _salt++; } return _salt; } } } private readonly object _root = new object(); private int _salt; private readonly int _min; private readonly int _max; internal void SetSalt(int value) { _salt = value; } }}
// PDU counter class.
// Copyright (C) 2008-2010 Malcolm Crowe, Lex Li, and other contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy of this
// software and associated documentation files (the "Software"), to deal in the Software
// without restriction, including without limitation the rights to use, copy, modify, merge,
// publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
// to whom the Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all copies or
// substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
// FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
using System;
namespace GSF.Net.Snmp.Messaging
{
/// <summary>
/// A counter that generates ID.
/// </summary>
/// <remarks>The request ID is used to identifier sessions.</remarks>
public sealed class NumberGenerator
{
/// <summary>
/// Initializes a new instance of the <see cref="NumberGenerator"/> class.
/// </summary>
/// <param name="min">The min.</param>
/// <param name="max">The max.</param>
public NumberGenerator(int min, int max)
{
_min = min;
_max = max;
_salt = new Random().Next(_min, _max);
}
/// <summary>
/// Returns next ID. This method is thread-safe within this instance of NumberGenerator.
/// </summary>
public int NextId
{
get
{
lock (_root)
{
if (_salt == _max)
{
_salt = _min;
}
else
{
_salt++;
}
return _salt;
}
}
}
private readonly object _root = new object();
private int _salt;
private readonly int _min;
private readonly int _max;
internal void SetSalt(int value)
{
_salt = value;
}
}
}