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https://github.com/greenshot/greenshot
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Fixed License [skip ci]
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Robin
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1 changed files with 54 additions and 64 deletions
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@ -1,26 +1,25 @@
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/*
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Dapplo - building blocks for desktop applications
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Copyright (C) 2015-2016 Dapplo
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For more information see: http://dapplo.net/
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Dapplo repositories are hosted on GitHub: https://github.com/dapplo
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This file is part of Dapplo.Addons
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Dapplo.Addons is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Dapplo.Addons is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Dapplo.Addons. If not, see <http://www.gnu.org/licenses/>.
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*/
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// Dapplo - building blocks for desktop applications
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// Copyright (C) 2015-2016 Dapplo
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//
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// For more information see: http://dapplo.net/
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// Dapplo repositories are hosted on GitHub: https://github.com/dapplo
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//
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// This file is part of Dapplo.Addons
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//
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// Dapplo.Addons is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Dapplo.Addons is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have Config a copy of the GNU Lesser General Public License
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// along with Dapplo.Addons. If not, see <http://www.gnu.org/licenses/lgpl.txt>.
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#region using
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using log4net;
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using System;
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@ -28,31 +27,24 @@ using System.Security.AccessControl;
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using System.Security.Principal;
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using System.Threading;
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#endregion
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namespace Greenshot.Helpers
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{
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/// <summary>
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/// This comes from Dapplo.Addons, which was created for Greenshot, this file is copied here as this is the only part we use in 1.2.8
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/// This protects your resources or application from running more than once
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/// Simplifies the usage of the Mutex class, as described here: https://msdn.microsoft.com/en-us/library/System.Threading.Mutex.aspx
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/// This protects your resources or application from running more than once
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/// Simplifies the usage of the Mutex class, as described here:
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/// https://msdn.microsoft.com/en-us/library/System.Threading.Mutex.aspx
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/// </summary>
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public class ResourceMutex : IDisposable
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{
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private static ILog LOG = LogManager.GetLogger(typeof(DestinationHelper));
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private static readonly ILog Log = LogManager.GetLogger(typeof(DestinationHelper));
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private readonly string _mutexId;
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private readonly string _resourceName;
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private Mutex _applicationMutex;
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/// <summary>
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/// Test if the Mutex was created and locked.
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/// </summary>
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public bool IsLocked
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{
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get;
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set;
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}
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/// <summary>
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/// Private constructor
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/// Private constructor
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/// </summary>
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/// <param name="mutexId"></param>
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/// <param name="resourceName"></param>
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@ -63,7 +55,12 @@ namespace Greenshot.Helpers
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}
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/// <summary>
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/// Create a ResourceMutex for the specified mutex id and resource-name
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/// Test if the Mutex was created and locked.
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/// </summary>
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public bool IsLocked { get; set; }
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/// <summary>
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/// Create a ResourceMutex for the specified mutex id and resource-name
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/// </summary>
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/// <param name="mutexId">ID of the mutex, preferably a Guid as string</param>
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/// <param name="resourceName">Name of the resource to lock, e.g your application name, usefull for logs</param>
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@ -76,12 +73,12 @@ namespace Greenshot.Helpers
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}
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/// <summary>
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/// This tries to get the Mutex, which takes care of having multiple instances running
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/// This tries to get the Mutex, which takes care of having multiple instances running
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/// </summary>
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/// <returns>true if it worked, false if another instance is already running or something went wrong</returns>
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public bool Lock()
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{
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LOG.DebugFormat("{0} is trying to get Mutex {1}", _resourceName, _mutexId);
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Log.DebugFormat("{0} is trying to get Mutex {1}", _resourceName, _mutexId);
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IsLocked = true;
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// check whether there's an local instance running already, but use local so this works in a multi-user environment
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@ -100,7 +97,7 @@ namespace Greenshot.Helpers
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// 2) if the mutex wasn't created new get the right to it, this returns false if it's already locked
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if (!createdNew && !_applicationMutex.WaitOne(100, false))
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{
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LOG.InfoFormat("{0} is already in use, mutex {1} is NOT locked for the caller", _resourceName, _mutexId);
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Log.InfoFormat("{0} is already in use, mutex {1} is NOT locked for the caller", _resourceName, _mutexId);
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IsLocked = false;
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// Clean up
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_applicationMutex.Close();
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@ -108,45 +105,38 @@ namespace Greenshot.Helpers
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}
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else
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{
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if (createdNew)
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{
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LOG.InfoFormat("{0} has created & claimed the mutex {1}", _resourceName, _mutexId);
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}
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else
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{
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LOG.InfoFormat("{0} has claimed the mutex {1}", _resourceName, _mutexId);
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}
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Log.InfoFormat(createdNew ? "{0} has created & claimed the mutex {1}" : "{0} has claimed the mutex {1}", _resourceName, _mutexId);
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}
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}
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catch (AbandonedMutexException e)
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{
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// Another instance didn't cleanup correctly!
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// we can ignore the exception, it happend on the "waitone" but still the mutex belongs to us
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LOG.WarnFormat("{0} didn't cleanup correctly, but we got the mutex {1}.", _resourceName, _mutexId);
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LOG.Warn(e);
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Log.WarnFormat("{0} didn't cleanup correctly, but we got the mutex {1}.", _resourceName, _mutexId);
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Log.Warn(e);
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}
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catch (UnauthorizedAccessException e)
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{
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LOG.ErrorFormat("{0} is most likely already running for a different user in the same session, can't create/get mutex {1} due to error.", _resourceName, _mutexId);
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LOG.Error(e);
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Log.ErrorFormat("{0} is most likely already running for a different user in the same session, can't create/get mutex {1} due to error.", _resourceName, _mutexId);
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Log.Error(e);
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IsLocked = false;
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}
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catch (Exception ex)
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{
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LOG.ErrorFormat("Problem obtaining the Mutex {1} for {0}, assuming it was already taken!", _resourceName, _mutexId);
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LOG.Error(ex);
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Log.ErrorFormat("Problem obtaining the Mutex {1} for {0}, assuming it was already taken!", _resourceName, _mutexId);
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Log.Error(ex);
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IsLocked = false;
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}
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return IsLocked;
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}
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#region IDisposable Support
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// To detect redundant Dispose calls
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private bool _disposedValue = false;
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private bool _disposedValue;
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/// <summary>
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/// The real disposing code
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/// The real disposing code
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/// </summary>
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/// <param name="disposing">true if dispose is called, false when the finalizer is called</param>
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protected virtual void Dispose(bool disposing)
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@ -159,21 +149,20 @@ namespace Greenshot.Helpers
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{
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_applicationMutex.ReleaseMutex();
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_applicationMutex = null;
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LOG.InfoFormat("Released Mutex {0} for {1}", _mutexId, _resourceName);
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Log.InfoFormat("Released Mutex {0} for {1}", _mutexId, _resourceName);
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}
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catch (Exception ex)
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{
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LOG.ErrorFormat("Error releasing Mutex {0} for {1}", _mutexId, _resourceName);
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LOG.Error(ex);
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Log.ErrorFormat("Error releasing Mutex {0} for {1}", _mutexId, _resourceName);
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Log.Error(ex);
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}
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}
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_disposedValue = true;
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}
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}
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/// <summary>
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/// Make sure the ApplicationMutex is disposed when the finalizer is called
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/// Make sure the ApplicationMutex is disposed when the finalizer is called
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/// </summary>
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~ResourceMutex()
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{
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@ -182,7 +171,7 @@ namespace Greenshot.Helpers
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}
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/// <summary>
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/// The dispose interface, which calls Dispose(true) to signal that dispose is called.
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/// The dispose interface, which calls Dispose(true) to signal that dispose is called.
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/// </summary>
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public void Dispose()
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{
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@ -190,6 +179,7 @@ namespace Greenshot.Helpers
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Dispose(true);
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GC.SuppressFinalize(this);
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}
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#endregion
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}
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}
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}
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