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This commit is contained in:
Tedd Hansen
@@ -1,239 +1,239 @@
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/*
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* Copyright (c) Contributors, http://opensimulator.org/
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* See CONTRIBUTORS.TXT for a full list of copyright holders.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * Neither the name of the OpenSim Project nor the
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* names of its contributors may be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS AS IS AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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using System;
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using System.Collections;
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using System.Collections.Generic;
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using System.Reflection;
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using OpenSim.Region.ScriptEngine.Common;
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namespace OpenSim.Region.ScriptEngine.Common.ScriptEngineBase
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{
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public class AppDomainManager
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{
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//
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// This class does AppDomain handling and loading/unloading of scripts in it.
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// It is instanced in "ScriptEngine" and controlled from "ScriptManager"
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//
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// 1. Create a new AppDomain if old one is full (or doesn't exist)
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// 2. Load scripts into AppDomain
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// 3. Unload scripts from AppDomain (stopping them and marking them as inactive)
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// 4. Unload AppDomain completely when all scripts in it has stopped
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//
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private int maxScriptsPerAppDomain = 1;
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/// <summary>
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/// Internal list of all AppDomains
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/// </summary>
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private List<AppDomainStructure> appDomains = new List<AppDomainStructure>();
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/// <summary>
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/// Structure to keep track of data around AppDomain
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/// </summary>
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private class AppDomainStructure
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{
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/// <summary>
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/// The AppDomain itself
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/// </summary>
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public AppDomain CurrentAppDomain;
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/// <summary>
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/// Number of scripts loaded into AppDomain
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/// </summary>
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public int ScriptsLoaded;
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/// <summary>
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/// Number of dead scripts
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/// </summary>
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public int ScriptsWaitingUnload;
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}
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/// <summary>
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/// Current AppDomain
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/// </summary>
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private AppDomainStructure currentAD;
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private object getLock = new object(); // Mutex
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private object freeLock = new object(); // Mutex
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//private ScriptEngine m_scriptEngine;
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//public AppDomainManager(ScriptEngine scriptEngine)
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public AppDomainManager()
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{
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//m_scriptEngine = scriptEngine;
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}
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/// <summary>
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/// Find a free AppDomain, creating one if necessary
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/// </summary>
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/// <returns>Free AppDomain</returns>
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private AppDomainStructure GetFreeAppDomain()
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{
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Console.WriteLine("Finding free AppDomain");
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lock (getLock)
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{
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// Current full?
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if (currentAD != null && currentAD.ScriptsLoaded >= maxScriptsPerAppDomain)
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{
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// Add it to AppDomains list and empty current
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appDomains.Add(currentAD);
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currentAD = null;
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}
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// No current
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if (currentAD == null)
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{
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// Create a new current AppDomain
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currentAD = new AppDomainStructure();
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currentAD.CurrentAppDomain = PrepareNewAppDomain();
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}
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Console.WriteLine("Scripts loaded in this Appdomain: " + currentAD.ScriptsLoaded);
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return currentAD;
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} // lock
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}
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private int AppDomainNameCount;
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/// <summary>
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/// Create and prepare a new AppDomain for scripts
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/// </summary>
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/// <returns>The new AppDomain</returns>
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private AppDomain PrepareNewAppDomain()
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{
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// Create and prepare a new AppDomain
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AppDomainNameCount++;
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// TODO: Currently security match current appdomain
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// Construct and initialize settings for a second AppDomain.
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AppDomainSetup ads = new AppDomainSetup();
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ads.ApplicationBase = AppDomain.CurrentDomain.BaseDirectory;
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ads.DisallowBindingRedirects = false;
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ads.DisallowCodeDownload = true;
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ads.LoaderOptimization = LoaderOptimization.MultiDomain; // Sounds good ;)
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ads.ShadowCopyFiles = "true"; // Enabled shadowing
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ads.ConfigurationFile = AppDomain.CurrentDomain.SetupInformation.ConfigurationFile;
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AppDomain AD = AppDomain.CreateDomain("ScriptAppDomain_" + AppDomainNameCount, null, ads);
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Console.WriteLine("Loading: " +
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AssemblyName.GetAssemblyName("OpenSim.Region.ScriptEngine.Common.dll").ToString());
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AD.Load(AssemblyName.GetAssemblyName("OpenSim.Region.ScriptEngine.Common.dll"));
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// Return the new AppDomain
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return AD;
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}
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/// <summary>
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/// Unload appdomains that are full and have only dead scripts
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/// </summary>
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private void UnloadAppDomains()
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{
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lock (freeLock)
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{
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// Go through all
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foreach (AppDomainStructure ads in new ArrayList(appDomains))
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{
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// Don't process current AppDomain
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if (ads.CurrentAppDomain != currentAD.CurrentAppDomain)
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{
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// Not current AppDomain
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// Is number of unloaded bigger or equal to number of loaded?
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if (ads.ScriptsLoaded <= ads.ScriptsWaitingUnload)
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{
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Console.WriteLine("Found empty AppDomain, unloading");
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// Remove from internal list
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appDomains.Remove(ads);
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#if DEBUG
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long m = GC.GetTotalMemory(true);
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#endif
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// Unload
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AppDomain.Unload(ads.CurrentAppDomain);
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#if DEBUG
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Console.WriteLine("AppDomain unload freed " + (m - GC.GetTotalMemory(true)) +
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" bytes of memory");
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#endif
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}
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}
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} // foreach
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} // lock
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}
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public IScript LoadScript(string FileName)
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{
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// Find next available AppDomain to put it in
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AppDomainStructure FreeAppDomain = GetFreeAppDomain();
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Console.WriteLine("Loading into AppDomain: " + FileName);
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IScript mbrt =
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(IScript)
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FreeAppDomain.CurrentAppDomain.CreateInstanceFromAndUnwrap(FileName, "SecondLife.Script");
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//Console.WriteLine("ScriptEngine AppDomainManager: is proxy={0}", RemotingServices.IsTransparentProxy(mbrt));
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FreeAppDomain.ScriptsLoaded++;
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return mbrt;
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}
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/// <summary>
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/// Increase "dead script" counter for an AppDomain
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/// </summary>
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/// <param name="ad"></param>
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//[Obsolete("Needs fixing, needs a real purpose in life!!!")]
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public void StopScript(AppDomain ad)
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{
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lock (freeLock)
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{
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Console.WriteLine("Stopping script in AppDomain");
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// Check if it is current AppDomain
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if (currentAD.CurrentAppDomain == ad)
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{
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// Yes - increase
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currentAD.ScriptsWaitingUnload++;
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return;
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}
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// Lopp through all AppDomains
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foreach (AppDomainStructure ads in new ArrayList(appDomains))
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{
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if (ads.CurrentAppDomain == ad)
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{
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// Found it
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ads.ScriptsWaitingUnload++;
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break;
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}
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} // foreach
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} // lock
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UnloadAppDomains(); // Outsite lock, has its own GetLock
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}
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}
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/*
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* Copyright (c) Contributors, http://opensimulator.org/
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* See CONTRIBUTORS.TXT for a full list of copyright holders.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * Neither the name of the OpenSim Project nor the
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* names of its contributors may be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS AS IS AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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using System;
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using System.Collections;
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using System.Collections.Generic;
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using System.Reflection;
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using OpenSim.Region.ScriptEngine.Common;
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namespace OpenSim.Region.ScriptEngine.Common.ScriptEngineBase
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{
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public class AppDomainManager
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{
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//
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// This class does AppDomain handling and loading/unloading of scripts in it.
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// It is instanced in "ScriptEngine" and controlled from "ScriptManager"
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//
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// 1. Create a new AppDomain if old one is full (or doesn't exist)
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// 2. Load scripts into AppDomain
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// 3. Unload scripts from AppDomain (stopping them and marking them as inactive)
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// 4. Unload AppDomain completely when all scripts in it has stopped
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//
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private int maxScriptsPerAppDomain = 1;
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/// <summary>
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/// Internal list of all AppDomains
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/// </summary>
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private List<AppDomainStructure> appDomains = new List<AppDomainStructure>();
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/// <summary>
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/// Structure to keep track of data around AppDomain
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/// </summary>
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private class AppDomainStructure
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{
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/// <summary>
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/// The AppDomain itself
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/// </summary>
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public AppDomain CurrentAppDomain;
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/// <summary>
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/// Number of scripts loaded into AppDomain
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/// </summary>
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public int ScriptsLoaded;
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/// <summary>
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/// Number of dead scripts
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/// </summary>
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public int ScriptsWaitingUnload;
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}
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/// <summary>
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/// Current AppDomain
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/// </summary>
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private AppDomainStructure currentAD;
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private object getLock = new object(); // Mutex
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private object freeLock = new object(); // Mutex
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//private ScriptEngine m_scriptEngine;
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//public AppDomainManager(ScriptEngine scriptEngine)
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public AppDomainManager()
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{
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//m_scriptEngine = scriptEngine;
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}
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/// <summary>
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/// Find a free AppDomain, creating one if necessary
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/// </summary>
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/// <returns>Free AppDomain</returns>
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private AppDomainStructure GetFreeAppDomain()
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{
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Console.WriteLine("Finding free AppDomain");
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lock (getLock)
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{
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// Current full?
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if (currentAD != null && currentAD.ScriptsLoaded >= maxScriptsPerAppDomain)
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{
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// Add it to AppDomains list and empty current
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appDomains.Add(currentAD);
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currentAD = null;
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}
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// No current
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if (currentAD == null)
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{
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// Create a new current AppDomain
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currentAD = new AppDomainStructure();
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currentAD.CurrentAppDomain = PrepareNewAppDomain();
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}
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Console.WriteLine("Scripts loaded in this Appdomain: " + currentAD.ScriptsLoaded);
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return currentAD;
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} // lock
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}
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private int AppDomainNameCount;
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/// <summary>
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/// Create and prepare a new AppDomain for scripts
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/// </summary>
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/// <returns>The new AppDomain</returns>
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private AppDomain PrepareNewAppDomain()
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{
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// Create and prepare a new AppDomain
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AppDomainNameCount++;
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// TODO: Currently security match current appdomain
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// Construct and initialize settings for a second AppDomain.
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AppDomainSetup ads = new AppDomainSetup();
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ads.ApplicationBase = AppDomain.CurrentDomain.BaseDirectory;
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ads.DisallowBindingRedirects = false;
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ads.DisallowCodeDownload = true;
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ads.LoaderOptimization = LoaderOptimization.MultiDomain; // Sounds good ;)
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ads.ShadowCopyFiles = "true"; // Enabled shadowing
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ads.ConfigurationFile = AppDomain.CurrentDomain.SetupInformation.ConfigurationFile;
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AppDomain AD = AppDomain.CreateDomain("ScriptAppDomain_" + AppDomainNameCount, null, ads);
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Console.WriteLine("Loading: " +
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AssemblyName.GetAssemblyName("OpenSim.Region.ScriptEngine.Common.dll").ToString());
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AD.Load(AssemblyName.GetAssemblyName("OpenSim.Region.ScriptEngine.Common.dll"));
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// Return the new AppDomain
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return AD;
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}
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/// <summary>
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/// Unload appdomains that are full and have only dead scripts
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/// </summary>
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private void UnloadAppDomains()
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{
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lock (freeLock)
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{
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// Go through all
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foreach (AppDomainStructure ads in new ArrayList(appDomains))
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{
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// Don't process current AppDomain
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if (ads.CurrentAppDomain != currentAD.CurrentAppDomain)
|
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{
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// Not current AppDomain
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// Is number of unloaded bigger or equal to number of loaded?
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if (ads.ScriptsLoaded <= ads.ScriptsWaitingUnload)
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{
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Console.WriteLine("Found empty AppDomain, unloading");
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// Remove from internal list
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appDomains.Remove(ads);
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#if DEBUG
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long m = GC.GetTotalMemory(true);
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#endif
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// Unload
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AppDomain.Unload(ads.CurrentAppDomain);
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#if DEBUG
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Console.WriteLine("AppDomain unload freed " + (m - GC.GetTotalMemory(true)) +
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" bytes of memory");
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#endif
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}
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}
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} // foreach
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} // lock
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}
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public IScript LoadScript(string FileName)
|
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{
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// Find next available AppDomain to put it in
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AppDomainStructure FreeAppDomain = GetFreeAppDomain();
|
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|
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Console.WriteLine("Loading into AppDomain: " + FileName);
|
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IScript mbrt =
|
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(IScript)
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FreeAppDomain.CurrentAppDomain.CreateInstanceFromAndUnwrap(FileName, "SecondLife.Script");
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//Console.WriteLine("ScriptEngine AppDomainManager: is proxy={0}", RemotingServices.IsTransparentProxy(mbrt));
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FreeAppDomain.ScriptsLoaded++;
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return mbrt;
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}
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||||
|
||||
|
||||
/// <summary>
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||||
/// Increase "dead script" counter for an AppDomain
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/// </summary>
|
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/// <param name="ad"></param>
|
||||
//[Obsolete("Needs fixing, needs a real purpose in life!!!")]
|
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public void StopScript(AppDomain ad)
|
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{
|
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lock (freeLock)
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{
|
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Console.WriteLine("Stopping script in AppDomain");
|
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// Check if it is current AppDomain
|
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if (currentAD.CurrentAppDomain == ad)
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{
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// Yes - increase
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currentAD.ScriptsWaitingUnload++;
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return;
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}
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// Lopp through all AppDomains
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foreach (AppDomainStructure ads in new ArrayList(appDomains))
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{
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if (ads.CurrentAppDomain == ad)
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{
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// Found it
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ads.ScriptsWaitingUnload++;
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break;
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}
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} // foreach
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} // lock
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UnloadAppDomains(); // Outsite lock, has its own GetLock
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}
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||||
}
|
||||
}
|
||||
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