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/******************************************************************************
* The MIT License
* Copyright (c) 2003 Novell Inc. www.novell.com
*
* 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.
*******************************************************************************/
//
// Novell.Directory.Ldap.Rfc2251.RfcMessageID.cs
//
// Author:
// Sunil Kumar (Sunilk@novell.com)
//
// (C) 2003 Novell, Inc (http://www.novell.com)
//
using System;
using Novell.Directory.Ldap.Asn1;
namespace Novell.Directory.Ldap.Rfc2251
{
/// <summary> Represents an Ldap Message ID.
///
/// <pre>
/// MessageID ::= INTEGER (0 .. maxInt)
///
/// maxInt INTEGER ::= 2147483647 -- (2^^31 - 1) --
///
/// Note: The creation of a MessageID should be hidden within the creation of
/// an RfcLdapMessage. The MessageID needs to be in sequence, and has an
/// upper and lower limit. There is never a case when a user should be
/// able to specify the MessageID for an RfcLdapMessage. The MessageID()
/// class should be package protected. (So the MessageID value isn't
/// arbitrarily run up.)
/// </pre>
/// </summary>
class RfcMessageID:Asn1Integer
{
/// <summary> Increments the message number atomically
///
/// </summary>
/// <returns> the new message number
/// </returns>
private static int MessageID
{
get
{
lock (lock_Renamed)
{
return (messageID < System.Int32.MaxValue)?++messageID:(messageID = 1);
}
}
}
private static int messageID = 0;
private static System.Object lock_Renamed;
/// <summary> Creates a MessageID with an auto incremented Asn1Integer value.
///
/// Bounds: (0 .. 2,147,483,647) (2^^31 - 1 or Integer.MAX_VALUE)
///
/// MessageID zero is never used in this implementation. Always
/// start the messages with one.
/// </summary>
protected internal RfcMessageID():base(MessageID)
{
}
/// <summary> Creates a MessageID with a specified int value.</summary>
protected internal RfcMessageID(int i):base(i)
{
}
static RfcMessageID()
{
lock_Renamed = new System.Object();
}
}
}
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