static void Main(string[] args)
{
SingleInstanceApp app;
if (SingleInstanceApp.Aquire(out app))
{
using (app)
{
var emacsWindow = FindWindow(EmacsClassName, null);
if (args.Length == 0 && emacsWindow != IntPtr.Zero)
{//No args, just want to run emacs
//Just pop that window to the foreground
if (IsIconic(emacsWindow))
{
ShowWindow(emacsWindow, SW_RESTORE);
}
SetForegroundWindow(emacsWindow);
}
else
{
RunEmacsClient(args);
}
}
}
}
public static bool Aquire(Assembly assembly, out SingleInstanceApp app)
{
// get application GUID as defined in AssemblyInfo.cs
string appGuid =
((GuidAttribute)Assembly.GetExecutingAssembly().
GetCustomAttributes(typeof(GuidAttribute), false).
GetValue(0)).Value.ToString();
// unique id for global mutex - Global prefix means it is global to the machine
string mutexId = string.Format("{{{0}}}", appGuid);
// Need a place to store a return value in Mutex() constructor call
bool createdNew;
// edited by MasonGZhwiti to prevent race condition on security settings via VanNguyen
var mutex = new Mutex(false, mutexId, out createdNew);
// edited by acidzombie24
var hasHandle = false;
try
{
try
{
hasHandle = mutex.WaitOne(0, false);
}
catch (AbandonedMutexException)
{
// Log the fact that the mutex was abandoned in another process,
// it will still get acquired
hasHandle = true;
}
if (hasHandle)
{
app = new SingleInstanceApp(mutex);
return(true);
}
else
{
app = null;
return(false);
}
}
catch
{
if (hasHandle)
{
mutex.ReleaseMutex();
}
app = null;
return(false);
}
}
public static bool Aquire(out SingleInstanceApp app)
{
return(Aquire(Assembly.GetExecutingAssembly(), out app));
}