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/*-
* See the file LICENSE for redistribution information.
*
* Copyright (c) 2009, 2015 Oracle and/or its affiliates. All rights reserved.
*
*/
using System;
using System.Collections.Generic;
using System.Text;
using BerkeleyDB.Internal;
namespace BerkeleyDB {
/// <summary>
/// A class to represent cache priority for database pages
/// </summary>
public class CachePriority {
private uint _priority;
internal uint priority {
get { return _priority; }
private set { _priority = value; }
}
private CachePriority(uint value) {
priority = value;
}
internal static CachePriority fromUInt(uint value) {
switch (value) {
case DbConstants.DB_PRIORITY_VERY_LOW:
return VERY_LOW;
case DbConstants.DB_PRIORITY_LOW:
return LOW;
case DbConstants.DB_PRIORITY_DEFAULT:
return DEFAULT;
case DbConstants.DB_PRIORITY_HIGH:
return HIGH;
case DbConstants.DB_PRIORITY_VERY_HIGH:
return VERY_HIGH;
default:
throw new ArgumentException("Invalid CachePriority value.");
}
}
/// <summary>
/// The lowest priority: pages are the most likely to be discarded.
/// </summary>
public static CachePriority VERY_LOW =
new CachePriority(DbConstants.DB_PRIORITY_VERY_LOW);
/// <summary>
/// The next lowest priority.
/// </summary>
public static CachePriority LOW =
new CachePriority(DbConstants.DB_PRIORITY_LOW);
/// <summary>
/// The default priority.
/// </summary>
public static CachePriority DEFAULT =
new CachePriority(DbConstants.DB_PRIORITY_DEFAULT);
/// <summary>
/// The next highest priority.
/// </summary>
public static CachePriority HIGH =
new CachePriority(DbConstants.DB_PRIORITY_HIGH);
/// <summary>
/// The highest priority: pages are the least likely to be discarded.
/// </summary>
public static CachePriority VERY_HIGH =
new CachePriority(DbConstants.DB_PRIORITY_VERY_HIGH);
}
}
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