From 618df147e19d12075f351930d6bf85e9b171c99c Mon Sep 17 00:00:00 2001
From: chatty
Date: Tue, 27 Jul 1993 14:02:13 +0000
Subject: Initial revision

---
 comm/XtMultiplexer.cc | 136 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 136 insertions(+)
 create mode 100644 comm/XtMultiplexer.cc

(limited to 'comm/XtMultiplexer.cc')

diff --git a/comm/XtMultiplexer.cc b/comm/XtMultiplexer.cc
new file mode 100644
index 0000000..edd2409
--- /dev/null
+++ b/comm/XtMultiplexer.cc
@@ -0,0 +1,136 @@
+/*
+ *	The Unix Channel
+ *
+ *	by Michel Beaudouin-Lafon and Stephane Chatty
+ *
+ *	Copyright 1990-1993
+ *	Laboratoire de Recherche en Informatique (LRI)
+ *	Centre d'Etudes de la Navigation Aerienne
+ *
+ *	Xt-based multiplexers
+ *
+ *	$Id$
+ *	$CurLog$
+ */
+
+#include "XtMultiplexer.h"
+#include "error.h"
+
+UchXtMultiplexer :: UchXtMultiplexer ()
+: UchBaseMultiplexer ()
+{
+	memset (ReadId, 0, NFILE * sizeof (XtInputId));
+	memset (WriteId, 0, NFILE * sizeof (XtInputId));
+}
+
+
+UchXtMultiplexer :: ~UchXtMultiplexer ()
+{
+}
+
+/* the input and output callback for channels */
+static void
+inputCB (XtPointer client_data, int*, XtInputId*)
+{
+	UchChannel* chan = (UchChannel*) client_data;
+	chan->HandleRead ();
+}
+
+static void
+outputCB (XtPointer client_data, int*, XtInputId*)
+{
+	UchChannel* chan = (UchChannel*) client_data;
+	chan->HandleWrite ();
+}
+
+void
+UchXtMultiplexer :: SetMasks (int fd, IOMODE mode)
+{
+	UchChannel* ch = Channels [fd];
+	if (!ch)
+		return;
+
+	/* remove if already there */
+	if (ReadId [fd]) {
+		XtRemoveInput (ReadId [fd]);
+		ReadId [fd] = (XtInputId) 0;
+		ReadCount--;
+	}
+	if (WriteId [fd]) {
+		XtRemoveInput (WriteId [fd]);
+		WriteId [fd] = (XtInputId) 0;
+		WriteCount--;
+	}
+
+	/* add channel */
+	if (mode & IORead) {
+		ReadId [fd] = XtAddInput (fd, (XtPointer) XtInputReadMask, inputCB, (caddr_t) ch);
+		ReadCount++;
+	}
+
+	if (mode & IOWrite) {
+		WriteId [fd] = XtAddInput (fd, (XtPointer) XtInputWriteMask, outputCB, (caddr_t) ch);
+		WriteCount++;
+	}
+
+	if (mode & IOSelect)
+		Error (ErrWarn, "AddChannel", "select condition ignored");
+}
+
+void
+UchXtMultiplexer :: FireTimers (void* mpx, XtIntervalId*)
+{
+	CcuCoreTimer::Fire (((UchXtMultiplexer*) mpx)->GetTimerSet ());
+}
+
+void
+UchXtMultiplexer :: SetTimeOut (Millisecond delay)
+{
+	/* should replace with XtAppAddTimeOut */
+	TimeOut = XtAddTimeOut (delay, &UchXtMultiplexer::FireTimers, this);
+}
+
+void
+UchXtMultiplexer :: SuppressTimeOut ()
+{
+	XtRemoveTimeOut (TimeOut);
+	TimeOut = 0;
+}
+
+void
+UchXtMultiplexer :: FireSignals (void* mpx)
+{
+	((UchXtMultiplexer*) mpx)->HandleDeferredSignals ();
+}
+
+
+void
+UchXtMultiplexer :: AddSignalHook ()
+{
+	/* should replace with XtAppAddWorkProc */
+	XtAddWorkProc ((XtWorkProc) (&UchXtMultiplexer::FireSignals), this);
+}
+		
+
+MPX_RES
+UchXtMultiplexer :: Loop ()
+{
+	XEvent event;
+	bool waiting = TRUE;
+
+	while (Looping && (waiting || ReadCount || WriteCount)) {
+		// *** problem with other loop: work proc are not called!
+		// *** we must find a way to exit properly with this one...
+		// *** sending ourselves an event???
+		XtNextEvent (&event);
+		XtDispatchEvent (&event);
+		if (ReadCount || WriteCount)
+			waiting = FALSE;
+	}
+	if (Looping) {
+		Looping = FALSE;
+		return isMpxEmpty;
+	}
+	return isMpxTerminated;
+}
+
-- 
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