/// <summary>
/// Helper method to open a named pipe via native APIs and return in
/// .Net NamedPipeClientStream wrapper object.
/// </summary>
protected override NamedPipeClientStream DoConnect(int timeout)
{
// Create pipe flags.
uint pipeFlags = NamedPipeNative.FILE_FLAG_OVERLAPPED;
//
// WaitNamedPipe API is not supported by Windows Server container now, so we need to repeatedly
// attempt connection to pipe server until timeout expires.
//
int startTime = Environment.TickCount;
int elapsedTime = 0;
SafePipeHandle pipeHandle = null;
do
{
// Get handle to pipe.
pipeHandle = NamedPipeNative.CreateFile(
_pipeName,
NamedPipeNative.GENERIC_READ | NamedPipeNative.GENERIC_WRITE,
0,
IntPtr.Zero,
NamedPipeNative.OPEN_EXISTING,
pipeFlags,
IntPtr.Zero);
int lastError = Marshal.GetLastWin32Error();
if (pipeHandle.IsInvalid)
{
if (lastError == NamedPipeNative.ERROR_FILE_NOT_FOUND)
{
elapsedTime = unchecked (Environment.TickCount - startTime);
Thread.Sleep(100);
continue;
}
else
{
throw new PSInvalidOperationException(
StringUtil.Format(RemotingErrorIdStrings.CannotConnectContainerNamedPipe, lastError));
}
}
else
{
break;
}
} while (elapsedTime < timeout);
try
{
return(new NamedPipeClientStream(
PipeDirection.InOut,
true,
true,
pipeHandle));
}
catch (Exception)
{
pipeHandle.Dispose();
throw;
}
}
/// <summary>
/// Helper method to open a named pipe via native APIs and return in
/// .Net NamedPipeClientStream wrapper object.
/// </summary>
private NamedPipeClientStream OpenNamedPipe()
{
// Create pipe flags.
uint pipeFlags = NamedPipeNative.FILE_FLAG_OVERLAPPED;
// Get handle to pipe.
SafePipeHandle pipeHandle = NamedPipeNative.CreateFile(
_pipeName,
NamedPipeNative.GENERIC_READ | NamedPipeNative.GENERIC_WRITE,
0,
IntPtr.Zero,
NamedPipeNative.OPEN_EXISTING,
pipeFlags,
IntPtr.Zero);
int lastError = Marshal.GetLastWin32Error();
if (pipeHandle.IsInvalid)
{
throw new System.ComponentModel.Win32Exception(lastError);
}
try
{
return(new NamedPipeClientStream(
PipeDirection.InOut,
true, // IsAsync
true, // IsConnected
pipeHandle));
}
catch (Exception e)
{
CommandProcessorBase.CheckForSevereException(e);
pipeHandle.Dispose();
throw;
}
}