/// <summary>
/// Ensures that the function is being executed on the owning thread (which is the thread on which DDE has been called for the first time).
/// </summary>
internal static void CheckOwnerThread()
{
if (_threadOwner == 0) // Invoked for the first time, remember the thread
{
_threadOwner = Win32Declarations.GetCurrentThreadId();
Trace.WriteLine(String.Format("DDE has remembered thread “{0}”#{1} as its owning thread.", Thread.CurrentThread.Name, _threadOwner), "[DDE]");
}
else
{ // There's already an “own thread” recorded, check that it matches the current thread
if (Win32Declarations.GetCurrentThreadId() != _threadOwner)
{
throw new InvalidOperationException(String.Format("DDE functions must be accessed from one thread only, the same one on which they were accessed for the first time (#{0} not “{1}”#{2}).", _threadOwner, Thread.CurrentThread.Name, Win32Declarations.GetCurrentThreadId()));
}
}
}
