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* Initial commit of the slimupdates2 rewrite. This pass maintains the original behavior of avatar update sending and has a simplified set of IClientAPI methods for sending avatar/prim updates

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2010-05-12 15:59:48 -07:00
parent 8368494554
commit bf5c81d77e
14 changed files with 712 additions and 704 deletions
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236
OpenSim/Framework/Lazy.cs Normal file
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//
// Lazy.cs
//
// Authors:
// Zoltan Varga (vargaz@gmail.com)
// Marek Safar (marek.safar@gmail.com)
//
// Copyright (C) 2009 Novell
//
// 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;
using System.Runtime.Serialization;
using System.Runtime.InteropServices;
using System.Security.Permissions;
using System.Threading;
using System.Diagnostics;
namespace OpenSim.Framework
{
public enum LazyThreadSafetyMode
{
None,
PublicationOnly,
ExecutionAndPublication
}
[SerializableAttribute]
[ComVisibleAttribute(false)]
[HostProtectionAttribute(SecurityAction.LinkDemand, Synchronization = true, ExternalThreading = true)]
public class Lazy<T>
{
T value;
bool inited;
LazyThreadSafetyMode mode;
Func<T> factory;
object monitor;
Exception exception;
public Lazy()
: this(LazyThreadSafetyMode.ExecutionAndPublication)
{
}
public Lazy(Func<T> valueFactory)
: this(valueFactory, LazyThreadSafetyMode.ExecutionAndPublication)
{
}
public Lazy(bool isThreadSafe)
: this(() => Activator.CreateInstance<T>(), isThreadSafe ? LazyThreadSafetyMode.ExecutionAndPublication : LazyThreadSafetyMode.None)
{
}
public Lazy(Func<T> valueFactory, bool isThreadSafe)
: this(valueFactory, isThreadSafe ? LazyThreadSafetyMode.ExecutionAndPublication : LazyThreadSafetyMode.None)
{
}
public Lazy(LazyThreadSafetyMode mode)
: this(() => Activator.CreateInstance<T>(), mode)
{
}
public Lazy(Func<T> valueFactory, LazyThreadSafetyMode mode)
{
if (valueFactory == null)
throw new ArgumentNullException("valueFactory");
this.factory = valueFactory;
if (mode != LazyThreadSafetyMode.None)
monitor = new object();
this.mode = mode;
}
// Don't trigger expensive initialization
[DebuggerBrowsable(DebuggerBrowsableState.Never)]
public T Value
{
get
{
if (inited)
return value;
if (exception != null)
throw exception;
return InitValue();
}
}
T InitValue()
{
switch (mode)
{
case LazyThreadSafetyMode.None:
{
var init_factory = factory;
if (init_factory == null)
throw exception = new InvalidOperationException("The initialization function tries to access Value on this instance");
try
{
factory = null;
T v = init_factory();
value = v;
Thread.MemoryBarrier();
inited = true;
}
catch (Exception ex)
{
exception = ex;
throw;
}
break;
}
case LazyThreadSafetyMode.PublicationOnly:
{
var init_factory = factory;
T v;
//exceptions are ignored
if (init_factory != null)
v = init_factory();
else
v = default(T);
lock (monitor)
{
if (inited)
return value;
value = v;
Thread.MemoryBarrier();
inited = true;
factory = null;
}
break;
}
case LazyThreadSafetyMode.ExecutionAndPublication:
{
lock (monitor)
{
if (inited)
return value;
if (factory == null)
throw exception = new InvalidOperationException("The initialization function tries to access Value on this instance");
var init_factory = factory;
try
{
factory = null;
T v = init_factory();
value = v;
Thread.MemoryBarrier();
inited = true;
}
catch (Exception ex)
{
exception = ex;
throw;
}
}
break;
}
default:
throw new InvalidOperationException("Invalid LazyThreadSafetyMode " + mode);
}
if (monitor == null)
{
value = factory();
inited = true;
}
else
{
lock (monitor)
{
if (inited)
return value;
if (factory == null)
throw new InvalidOperationException("The initialization function tries to access Value on this instance");
var init_factory = factory;
try
{
factory = null;
T v = init_factory();
value = v;
Thread.MemoryBarrier();
inited = true;
}
catch
{
factory = init_factory;
throw;
}
}
}
return value;
}
public bool IsValueCreated
{
get
{
return inited;
}
}
public override string ToString()
{
if (inited)
return value.ToString();
else
return "Value is not created";
}
}
}