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using System;
using System.Collections.Generic;
using System.Threading;
using Pfz.Caching;
using Pfz.Extensions;
using Pfz.Threading;
namespace Pfz.Remoting.Internal
{
internal sealed class _BidirectionalDictionary:
ThreadSafeDisposable,
IGarbageCollectionAware
{
private long _idGenerator;
private sealed class Helper
{
internal Dictionary<object, long> _dictionary2 = new Dictionary<object, long>(ReferenceComparer.Instance);
}
internal Dictionary<long, object> _dictionary1 = new Dictionary<long, object>();
private Dictionary<Thread, Helper> _helpers = new Dictionary<Thread, Helper>(ReferenceComparer.Instance);
internal _BidirectionalDictionary()
{
GCUtils.RegisterForCollectedNotification(this);
}
protected override void Dispose(bool disposing)
{
if (disposing)
GCUtils.UnregisterFromCollectedNotification(this);
base.Dispose(disposing);
}
void IGarbageCollectionAware.OnCollected()
{
if (WasDisposed)
return;
try
{
lock(DisposeLock)
{
_dictionary1 = new Dictionary<long,object>(_dictionary1);
var oldHelper = _helpers;
var newHelper = new Dictionary<Thread, Helper>(ReferenceComparer.Instance);
foreach(var pair in oldHelper)
{
var thread = pair.Key;
var value = pair.Value;
if (thread.IsAlive)
{
newHelper.Add(thread, value);
value._dictionary2 = new Dictionary<object,long>(value._dictionary2, ReferenceComparer.Instance);
}
}
_helpers = newHelper;
}
}
catch
{
}
}
public object Get(long id)
{
object result;
lock(DisposeLock)
if (!_dictionary1.TryGetValue(id, out result))
throw new RemotingException("Can't find Id referenced from remote side... how?");
return result;
}
public _ReferenceOrWrapped GetOrWrap(object obj)
{
long id;
lock(DisposeLock)
{
var helper = _helpers.GetOrCreateValue(Thread.CurrentThread);
if (helper._dictionary2.TryGetValue(obj, out id))
return new _Reference { Id = id };
id = Interlocked.Increment(ref _idGenerator);
_dictionary1.Add(id, obj);
helper._dictionary2.Add(obj, id);
var type = obj.GetType();
if (type.IsSubclassOf(typeof(Delegate)))
{
_WrappedDelegate wd = new _WrappedDelegate();
wd.DelegateType = type;
wd.Id = id;
return wd;
}
_Wrapped wrapped = new _Wrapped();
wrapped.Id = id;
wrapped.InterfaceTypes = type.GetFinalInterfaces();
return wrapped;
}
}
internal void RemoveIds(long[] ids)
{
foreach(long id in ids)
{
object obj;
if (!_dictionary1.TryGetValue(id, out obj))
throw new RemotingException("Trying to remove a reference that does not exist!");
_dictionary1.Remove(id);
foreach(var helper in _helpers.Values)
{
long otherId;
if (helper._dictionary2.TryGetValue(obj, out otherId))
{
if (otherId == id)
{
helper._dictionary2.Remove(obj);
break;
}
}
}
}
}
internal void Clear()
{
lock(DisposeLock)
{
_dictionary1.Clear();
foreach(var helper in _helpers.Values)
helper._dictionary2.Clear();
}
}
}
}
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I started to program computers when I was 11 years old, as a hobbyist, programming in AMOS Basic and Blitz Basic for Amiga.
At 12 I had my first try with assembler, but it was too difficult at the time. Then, in the same year, I learned C and, after learning C, I was finally able to learn assembler (for Motorola 680x0).
Not sure, but probably between 12 and 13, I started to learn C++. I always programmed "in an object oriented way", but using function pointers instead of virtual methods.
At 15 I started to learn Pascal at school and to use Delphi. At 16 I started my first internship (using Delphi). At 18 I started to work professionally using C++ and since then I've developed my programming skills as a professional developer in C++ and C#, generally creating libraries that help other developers do their work easier, faster and with less errors.
Want more info or simply want to contact me?
Take a look at:
http://paulozemek.azurewebsites.net/
Or e-mail me at: paulozemek@outlook.com
Codeproject MVP 2012, 2015 & 2016
Microsoft MVP 2013-2014 (in October 2014 I started working at Microsoft, so I can't be a Microsoft MVP anymore).