ZeroInstall.Store.ManagerBase.AquireMutex C# (CSharp) Method

        protected void AquireMutex()
        {
            if (MachineWide)
            {
                var mutexSecurity = new MutexSecurity();
                mutexSecurity.AddAccessRule(new MutexAccessRule(new SecurityIdentifier(WellKnownSidType.WorldSid, null), MutexRights.FullControl, AccessControlType.Allow));
                bool createdNew;
                _mutex = new Mutex(false, @"Global\" + MutexName, out createdNew, mutexSecurity);
            }
            _mutex = new Mutex(false, MutexName);

            try
            {
                switch (WaitHandle.WaitAny(new[] {_mutex, Handler.CancellationToken.WaitHandle},
                    millisecondsTimeout: (Handler.Verbosity == Verbosity.Batch) ? 30000 : 1000, exitContext: false))
                {
                    case 0:
                        return;
                    case 1:
                        throw new OperationCanceledException();
                    default:
                    case WaitHandle.WaitTimeout:
                        throw new UnauthorizedAccessException("Another process is already holding the mutex " + MutexName + ".");
                }
            }
            catch (AbandonedMutexException ex)
            {
                // Abandoned mutexes also get owned, but indicate something may have gone wrong elsewhere
                Log.Warn(ex.Message);
            }
        }