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Move all code related to single instance logic to separate class (#2871)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,154 @@ | ||
| // Copyright (c) 2022 AlphaSierraPapa for the SharpDevelop Team | ||
| // | ||
| // 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.Collections.Generic; | ||
| using System.Diagnostics; | ||
| using System.IO; | ||
| using System.Linq; | ||
| using System.Threading; | ||
|
|
||
| namespace ICSharpCode.ILSpy | ||
| { | ||
| internal static class SingleInstanceHandling | ||
| { | ||
| internal static Mutex SingleInstanceMutex; | ||
|
|
||
| internal static void ForceSingleInstance(IEnumerable<string> cmdArgs) | ||
| { | ||
| bool isFirst; | ||
| try | ||
| { | ||
| SingleInstanceMutex = new Mutex(initiallyOwned: true, @"Local\ILSpyInstance", out isFirst); | ||
| } | ||
| catch (WaitHandleCannotBeOpenedException) | ||
| { | ||
| isFirst = true; | ||
| } | ||
| if (!isFirst) | ||
| { | ||
| try | ||
| { | ||
| SingleInstanceMutex.WaitOne(10000); | ||
| } | ||
| catch (AbandonedMutexException) | ||
| { | ||
| // continue, there is no concurrent start happening. | ||
| } | ||
| } | ||
| cmdArgs = cmdArgs.Select(FullyQualifyPath); | ||
| string message = string.Join(Environment.NewLine, cmdArgs); | ||
| if (SendToPreviousInstance("ILSpy:\r\n" + message, !App.CommandLineArguments.NoActivate)) | ||
| { | ||
| ReleaseSingleInstanceMutex(); | ||
| Environment.Exit(0); | ||
| } | ||
| } | ||
|
|
||
| internal static string FullyQualifyPath(string argument) | ||
| { | ||
| // Fully qualify the paths before passing them to another process, | ||
| // because that process might use a different current directory. | ||
| if (string.IsNullOrEmpty(argument) || argument[0] == '/') | ||
| return argument; | ||
| try | ||
| { | ||
| return Path.Combine(Environment.CurrentDirectory, argument); | ||
| } | ||
| catch (ArgumentException) | ||
| { | ||
| return argument; | ||
| } | ||
| } | ||
|
|
||
| internal static void ReleaseSingleInstanceMutex() | ||
| { | ||
| var mutex = SingleInstanceMutex; | ||
| SingleInstanceMutex = null; | ||
| if (mutex == null) | ||
| { | ||
| return; | ||
| } | ||
| using (mutex) | ||
| { | ||
| mutex.ReleaseMutex(); | ||
| } | ||
| } | ||
|
|
||
| #region Pass Command Line Arguments to previous instance | ||
| internal static bool SendToPreviousInstance(string message, bool activate) | ||
| { | ||
| string ownProcessName; | ||
| using (var ownProcess = Process.GetCurrentProcess()) | ||
| { | ||
| ownProcessName = ownProcess.ProcessName; | ||
| } | ||
|
|
||
| bool success = false; | ||
| NativeMethods.EnumWindows( | ||
| (hWnd, lParam) => { | ||
| string windowTitle = NativeMethods.GetWindowText(hWnd, 100); | ||
| if (windowTitle.StartsWith("ILSpy", StringComparison.Ordinal)) | ||
| { | ||
| string processName = NativeMethods.GetProcessNameFromWindow(hWnd); | ||
| Debug.WriteLine("Found {0:x4}: '{1}' in '{2}'", hWnd, windowTitle, processName); | ||
| if (string.Equals(processName, ownProcessName, StringComparison.OrdinalIgnoreCase)) | ||
| { | ||
| IntPtr result = Send(hWnd, message); | ||
| Debug.WriteLine("WM_COPYDATA result: {0:x8}", result); | ||
| if (result == (IntPtr)1) | ||
| { | ||
| if (activate) | ||
| NativeMethods.SetForegroundWindow(hWnd); | ||
| success = true; | ||
| return false; // stop enumeration | ||
| } | ||
| } | ||
| } | ||
| return true; // continue enumeration | ||
| }, IntPtr.Zero); | ||
| return success; | ||
| } | ||
|
|
||
| unsafe static IntPtr Send(IntPtr hWnd, string message) | ||
| { | ||
| const uint SMTO_NORMAL = 0; | ||
|
|
||
| CopyDataStruct lParam; | ||
| lParam.Padding = IntPtr.Zero; | ||
| lParam.Size = message.Length * 2; | ||
| fixed (char* buffer = message) | ||
| { | ||
| lParam.Buffer = (IntPtr)buffer; | ||
| IntPtr result; | ||
| // SendMessage with 3s timeout (e.g. when the target process is stopped in the debugger) | ||
| if (NativeMethods.SendMessageTimeout( | ||
| hWnd, NativeMethods.WM_COPYDATA, IntPtr.Zero, ref lParam, | ||
| SMTO_NORMAL, 3000, out result) != IntPtr.Zero) | ||
| { | ||
| return result; | ||
| } | ||
| else | ||
| { | ||
| return IntPtr.Zero; | ||
| } | ||
| } | ||
| } | ||
| #endregion | ||
| } | ||
| } |