internal static void RunInternal(ExecutionContext executionContext, ContextCallback callback, object state, bool preserveSyncCtx)
{
if (!executionContext.IsPreAllocatedDefault)
{
executionContext.isNewCapture = false;
}
Thread currentThread = Thread.CurrentThread;
ExecutionContextSwitcher ecsw = new ExecutionContextSwitcher();
RuntimeHelpers.PrepareConstrainedRegions();
try
{
ExecutionContext.Reader executionContextReader = currentThread.GetExecutionContextReader();
if ((executionContextReader.IsNull || executionContextReader.IsDefaultFTContext(preserveSyncCtx)) && (SecurityContext.CurrentlyInDefaultFTSecurityContext(executionContextReader) && executionContext.IsDefaultFTContext(preserveSyncCtx)) && executionContextReader.HasSameLocalValues(executionContext))
{
ExecutionContext.EstablishCopyOnWriteScope(currentThread, true, ref ecsw);
}
else
{
if (executionContext.IsPreAllocatedDefault)
{
executionContext = new ExecutionContext();
}
ecsw = ExecutionContext.SetExecutionContext(executionContext, preserveSyncCtx);
}
callback(state);
}
finally
{
ecsw.Undo();
}
}
