/// <summary>
/// Check if anyother pipeline is executing.
/// In case of nested pipeline, checks that it is called
/// from currently executing pipeline's thread.
/// </summary>
/// <param name="syncCall">True if method is called from Invoke, false
/// if called from InvokeAsync</param>
/// <param name="syncObject">The sync object on which the lock is acquired.</param>
/// <param name="isInLock">True if the method is invoked in a critical section.</param>
/// <exception cref="InvalidOperationException">
/// 1) A pipeline is already executing. Pipeline cannot execute
/// concurrently.
/// 2) InvokeAsync is called on nested pipeline. Nested pipeline
/// cannot be executed Asynchronously.
/// 3) Attempt is made to invoke a nested pipeline directly. Nested
/// pipeline must be invoked from a running pipeline.
/// </exception>
internal void DoConcurrentCheck(bool syncCall, object syncObject, bool isInLock)
{
PipelineBase currentPipeline = (PipelineBase)RunspaceBase.GetCurrentlyRunningPipeline();
if (IsNested == false)
{
if (currentPipeline == null)
{
return;
}
else
{
// Detect if we're running a pulse pipeline, or we're running a nested pipeline
// in a pulse pipeline
if (currentPipeline == RunspaceBase.PulsePipeline ||
(currentPipeline.IsNested && RunspaceBase.PulsePipeline != null))
{
// If so, wait and try again
if (isInLock)
{
// If the method is invoked in the lock statement, release the
// lock before wait on the pulse pipeline
Monitor.Exit(syncObject);
}
try
{
RunspaceBase.WaitForFinishofPipelines();
}
finally
{
if (isInLock)
{
// If the method is invoked in the lock statement, acquire the
// lock before we carry on with the rest operations
Monitor.Enter(syncObject);
}
}
DoConcurrentCheck(syncCall, syncObject, isInLock);
return;
}
throw PSTraceSource.NewInvalidOperationException(
RunspaceStrings.ConcurrentInvokeNotAllowed);
}
}
else
{
if (_performNestedCheck)
{
if (syncCall == false)
{
throw PSTraceSource.NewInvalidOperationException(
RunspaceStrings.NestedPipelineInvokeAsync);
}
if (currentPipeline == null)
{
if (this.IsChild)
{
// OK it's not really a nested pipeline but a call with RunspaceMode=UseCurrentRunspace
// This shouldn't fail so we'll clear the IsNested and IsChild flags and then return
// That way executions proceeds but everything gets clean up at the end when the pipeline completes
this.IsChild = false;
_isNested = false;
return;
}
throw PSTraceSource.NewInvalidOperationException(
RunspaceStrings.NestedPipelineNoParentPipeline);
}
Dbg.Assert(currentPipeline.NestedPipelineExecutionThread != null, "Current pipeline should always have NestedPipelineExecutionThread set");
Thread th = Thread.CurrentThread;
if (currentPipeline.NestedPipelineExecutionThread.Equals(th) == false)
{
throw PSTraceSource.NewInvalidOperationException(
RunspaceStrings.NestedPipelineNoParentPipeline);
}
}
}
}
/// <summary>
/// Invoke the pipeline asynchronously with input.
/// </summary>
/// <param name="input">input to provide to pipeline. Input is
/// used only for synchronous execution</param>
/// <param name="syncCall">True if this method is called from
/// synchronous invoke else false</param>
/// <remarks>
/// Results are returned through the <see cref="Pipeline.Output"/> reader.
/// </remarks>
/// <exception cref="InvalidOperationException">
/// No command is added to pipeline
/// </exception>
/// <exception cref="InvalidPipelineStateException">
/// PipelineState is not NotStarted.
/// </exception>
/// <exception cref="InvalidOperationException">
/// 1) A pipeline is already executing. Pipeline cannot execute
/// concurrently.
/// 2) InvokeAsync is called on nested pipeline. Nested pipeline
/// cannot be executed Asynchronously.
/// 3) Attempt is made to invoke a nested pipeline directly. Nested
/// pipeline must be invoked from a running pipeline.
/// </exception>
/// <exception cref="InvalidRunspaceStateException">
/// RunspaceState is not Open
/// </exception>
/// <exception cref="ObjectDisposedException">
/// Pipeline already disposed
/// </exception>
private void CoreInvoke(IEnumerable input, bool syncCall)
{
lock (SyncRoot)
{
// NTRAID#Windows Out Of Band Releases-915851-2005/09/13
if (_disposed)
{
throw PSTraceSource.NewObjectDisposedException("pipeline");
}
if (Commands == null || Commands.Count == 0)
{
throw PSTraceSource.NewInvalidOperationException(
RunspaceStrings.NoCommandInPipeline);
}
if (PipelineState != PipelineState.NotStarted)
{
InvalidPipelineStateException e =
new InvalidPipelineStateException
(
StringUtil.Format(RunspaceStrings.PipelineReInvokeNotAllowed),
PipelineState,
PipelineState.NotStarted
);
throw e;
}
if (syncCall && !(InputStream is PSDataCollectionStream <PSObject> || InputStream is PSDataCollectionStream <object>))
{
// Method is called from synchronous invoke.
if (input != null)
{
// TO-DO-Add a test make sure that ObjectDisposed
// exception is thrown
// Write input data in to inputStream and close the input
// pipe. If Input stream is already closed an
// ObjectDisposed exception will be thrown
foreach (object temp in input)
{
InputStream.Write(temp);
}
}
InputStream.Close();
}
SyncInvokeCall = syncCall;
// Create event which will be signalled when pipeline execution
// is completed/failed/stoped.
// Note:Runspace.Close waits for all the running pipeline
// to finish. This Event must be created before pipeline is
// added to list of running pipelines. This avoids the race condition
// where Close is called after pipeline is added to list of
// running pipeline but before event is created.
PipelineFinishedEvent = new ManualResetEvent(false);
// 1) Do the check to ensure that pipeline no other
// pipeline is running.
// 2) Runspace object maintains a list of pipelines in
// execution. Add this pipeline to the list.
RunspaceBase.DoConcurrentCheckAndAddToRunningPipelines(this, syncCall);
// Note: Set PipelineState to Running only after adding pipeline to list
// of pipelines in execution. AddForExecution checks that runspace is in
// state where pipeline can be run.
// StartPipelineExecution raises this event. See Windows Bug 1160481 for
// more details.
SetPipelineState(PipelineState.Running);
}
try
{
// Let the derived class start the pipeline execution.
StartPipelineExecution();
}
catch (Exception exception)
{
// If we fail in any of the above three steps, set the correct states.
RunspaceBase.RemoveFromRunningPipelineList(this);
SetPipelineState(PipelineState.Failed, exception);
// Note: we are not raising the events in this case. However this is
// fine as user is getting the exception.
throw;
}
}
internal SessionStateProxy(RunspaceBase runspace)
{
this._runspace = runspace;
}
internal SessionStateProxy(RunspaceBase runspace)
{
this._runspace = runspace;
}
internal SessionStateProxy(RunspaceBase runspace)
{
Dbg.Assert(runspace != null, "Caller should validate the parameter");
_runspace = runspace;
}
