/// <summary>
/// Invokes the parser using a separate thread.
/// </summary>
/// <remarks>
/// Uses the <see cref="ParserWorkitem"/> helper class to execute parsing. This
/// ensures that parser invocations always return, even if the parser itself hangs.
/// </remarks>
/// <param name="rd">A <see cref="System.IO.TextReader"/> with the code to parse.</param>
/// <param name="filename">The filename or the value of <see cref="CODE"/> constant.</param>
/// <param name="errors">The error list returned by the parser.</param>
/// <returns></returns>
static CompilationUnitNode InvokeParse(TextReader rd, string filename, out List <Parser.Error> errors)
{
errors = null;
EventWaitHandle wait = new EventWaitHandle(false, EventResetMode.AutoReset);
ParserWorkitem workitem = new ParserWorkitem(rd, filename, wait);
Thread workerThread = new Thread(workitem.Parse);
workerThread.Priority = ThreadPriority.AboveNormal;
workerThread.Start();
if (wait.WaitOne(_timeout, false))
{
// Were there any exceptions in parser itself? If so, rethrow these.
if (workitem.ExceptionFromParser != null)
{
throw workitem.ExceptionFromParser;
}
// Parser finished regularly. -> Return results.
errors = workitem.Errors;
return(workitem.Result);
}
// If we arrive here, the timeout has elapsed ->
// abort parser thread, then throw TimeoutException.
// *************************************************
workerThread.Abort();
workerThread.Join(); // waits until the thread really is canceled
throw new TimeoutException("Parser invocation timed out, timeout value (in ms): " + _timeout + ".");
}
/// <summary>
/// Invokes the parser using a separate thread.
/// </summary>
/// <remarks>
/// Uses the <see cref="ParserWorkitem"/> helper class to execute parsing. This
/// ensures that parser invocations always return, even if the parser itself hangs.
/// </remarks>
/// <param name="rd">A <see cref="System.IO.TextReader"/> with the code to parse.</param>
/// <param name="filename">The filename or the value of <see cref="CODE"/> constant.</param>
/// <param name="errors">The error list returned by the parser.</param>
/// <returns></returns>
static CompilationUnitNode InvokeParse(TextReader rd, string filename, out List<Parser.Error> errors)
{
errors = null;
EventWaitHandle wait = new EventWaitHandle(false, EventResetMode.AutoReset);
ParserWorkitem workitem = new ParserWorkitem(rd, filename, wait);
Thread workerThread = new Thread(workitem.Parse);
workerThread.Priority = ThreadPriority.AboveNormal;
workerThread.Start();
if (wait.WaitOne(_timeout, false))
{
// Were there any exceptions in parser itself? If so, rethrow these.
if (workitem.ExceptionFromParser != null)
throw workitem.ExceptionFromParser;
// Parser finished regularly. -> Return results.
errors = workitem.Errors;
return workitem.Result;
}
// If we arrive here, the timeout has elapsed ->
// abort parser thread, then throw TimeoutException.
// *************************************************
workerThread.Abort();
workerThread.Join(); // waits until the thread really is canceled
throw new TimeoutException("Parser invocation timed out, timeout value (in ms): " + _timeout + ".");
}