source: branches/eraser6/Manager/PRNG.cs @ 185

using System;
using System.Collections.Generic;
using System.Text;

namespace Eraser.Manager
{
    public partial class Globals
    {
        internal static PRNGManager PRNGManager = new PRNGManager();
    }

    /// <summary>
    /// An interface class for all pseudorandom number generators used for the
    /// random data erase passes.
    /// </summary>
    public abstract class PRNG : Random
    {
        public override string ToString()
        {
            return Name;
        }

        /// <summary>
        /// The name of this erase pass, used for display in the UI
        /// </summary>
        public abstract string Name
        {
            get;
        }

        /// <summary>
        /// The GUID for this PRNG.
        /// </summary>
        public abstract Guid GUID
        {
            get;
        }
    }

    /// <summary>
    /// Class managing all the PRNG algorithms.
    /// </summary>
    public class PRNGManager
    {
        /// <summary>
        /// Retrieves all currently registered erasure methods.
        /// </summary>
        /// <returns>A mutable list, with an instance of each PRNG.</returns>
        public static Dictionary<Guid, PRNG> GetAll()
        {
            lock (Globals.PRNGManager.prngs)
                return Globals.PRNGManager.prngs;
        }

        /// <summary>
        /// Allows plug-ins to register PRNGs with the main program. Thread-safe.
        /// </summary>
        /// <param name="method"></param>
        public static void Register(PRNG prng)
        {
            lock (Globals.PRNGManager.prngs)
                Globals.PRNGManager.prngs.Add(prng.GUID, prng);
        }

        /// <summary>
        /// The list of currently registered erasure methods.
        /// </summary>
        private Dictionary<Guid, PRNG> prngs = new Dictionary<Guid, PRNG>();
    }
}