From 4068e7bb6e42d94f2f2b14c1667e77b9d19ce9b6 Mon Sep 17 00:00:00 2001
From: chatty
Date: Mon, 26 Jul 1993 07:52:54 +0000
Subject: Added functions for UchSignalHandlers

---
 comm/Multiplexer.cc | 36 +++++++++++++++++++++++++++++++++++-
 comm/Multiplexer.h  |  6 ++++++
 2 files changed, 41 insertions(+), 1 deletion(-)

(limited to 'comm')

diff --git a/comm/Multiplexer.cc b/comm/Multiplexer.cc
index 3ac88ff..a763c6d 100644
--- a/comm/Multiplexer.cc
+++ b/comm/Multiplexer.cc
@@ -14,7 +14,9 @@
 
 #include "Multiplexer.h"
 #include "TimeOut.h"
+#include "Signal.h"
 
+#include <signal.h>	// for NSIG
 #include <sys/errno.h>
 #include <sys/time.h>
 #include <sys/socket.h>
@@ -75,11 +77,16 @@ UchMultiplexer :: UchMultiplexer ()
   WriteCount (0),
   SelectCount (0),
   Looping (FALSE),
-  TimeOut (-1)
+  SigFired (FALSE),
+  TimeOut (-1),
+  Handlers (new UchBaseSignalHandler* [NSIG]),
+  NbSignals (new int [NSIG])
 {
 	FD_ZERO (&ReadMask);
 	FD_ZERO (&WriteMask);
 	FD_ZERO (&SelectMask);
+	memset (Handlers, 0, NSIG * sizeof (UchBaseSignalHandler*));
+	memset (NbSignals, 0, NSIG * sizeof (int));
 }
 
 /*?nodoc?*/
@@ -89,6 +96,8 @@ UchMultiplexer :: ~UchMultiplexer ()
 	delete [NFILE] Channels;
 #else
 	delete [] Channels;
+	delete [] NbSignals;
+	delete [] Handlers;
 #endif
 	Channels = 0;
 }
@@ -263,6 +272,7 @@ UchMultiplexer :: SetModeNotify (UchChannel*, IOMODE)
 	// nothing
 }
 
+////// should add signal handling
 /*?nextdoc?*/
 int
 UchMultiplexer :: Scan (bool nointr, bool poll)
@@ -368,8 +378,22 @@ UchMultiplexer :: LoopScan (bool nointr)
 	Looping = TRUE;
 	
 	for (fd0 = 0; Looping; fd0 < NFILE ? fd0++ : (fd0 = 0)) {
+		/* First, handle signals */
+		if (SigFired) {
+			CcuSignalBlocker b (AllSigs);
+			int c;
+			for (int i = 0; i < NSIG; ++i)
+				if (c = NbSignals [i]) {
+					Handlers [i]->DeferredHandle (c);
+					NbSignals [i] = 0;
+					Handlers [i] = 0;
+				}
+		}
+
+		/* Then, timers */
 		CcuCoreTimer::Fire (&Timers);
 
+		/* Then, I/Os */
 		if (ReadCount == 0 && WriteCount == 0 && SelectCount == 0)
 			return 0;
 		
@@ -462,3 +486,13 @@ UchMultiplexer :: LoopEnd ()
 
 #endif /* DOC */
 
+void
+UchMultiplexer :: RegisterSignal (UchBaseSignalHandler& h)
+{
+	SigFired = TRUE;
+	int sig = h.GetSignal () - 1;
+	/* We have to work with arrays, because we are in a signal
+	   handler, and we cannot use lists */
+	Handlers [sig] = &h;
+	NbSignals [sig]++;
+}
diff --git a/comm/Multiplexer.h b/comm/Multiplexer.h
index 0c30bfd..7024463 100644
--- a/comm/Multiplexer.h
+++ b/comm/Multiplexer.h
@@ -32,6 +32,7 @@ extern	char*	StrReprBuf;
 //
 class UchMultiplexer : public CcuSmartData {
 friend	class	UchBaseTimeOut;
+friend	class	UchBaseSignalHandler;
 
 protected:
 	pUchChannel*	Channels;
@@ -44,6 +45,9 @@ protected:
 	short		SelectCount;
 	bool		Looping;
 	Millisecond	TimeOut;
+	bool	SigFired;
+	UchBaseSignalHandler**	Handlers;
+	int*	NbSignals;
 	int		fd0;	// used by HandleSelect and LoopScan
 	
 	void		SetMasks (int, IOMODE);
@@ -51,6 +55,8 @@ inline	CcuTimerSet*	GetTimerSet ()	{ return &Timers; }
 inline	void	SetTimeOut (Millisecond t)	{ TimeOut = t; }
 inline	void	SuppressTimeOut ()		{TimeOut = -1; }
 
+	void	RegisterSignal (UchBaseSignalHandler&);
+
 public:
 		UchMultiplexer ();
 		~UchMultiplexer ();
-- 
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