/*
 *	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
 *
 *	Tk-based multiplexers
 *
 *	$Id$
 *	$CurLog$
 */

#include "TkMultiplexer.h"
#include "error.h"

#include <memory.h>

static void
ioHandler (ClientData client_data, int mask)
{
	UchChannel* ch = (UchChannel*) client_data;
	if (mask & TK_WRITABLE)
		ch->HandleWrite ();
	if (mask & TK_READABLE)
		ch->HandleRead ();
}

UchTkMultiplexer :: UchTkMultiplexer ()
: UchBaseMultiplexer ()
{
	memset (Active, 0, NFILE * sizeof (bool));
}


UchTkMultiplexer :: ~UchTkMultiplexer ()
{
}

void
UchTkMultiplexer :: SetMasks (int fd, IOMODE mode)
{
	UchChannel* ch = Channels [fd];
	if (!ch)
		return;

	/* remove if already there */
	if (Active [fd]) {
		Tk_DeleteFileHandler (fd);
		ReadCount--;
	}

	/* add channel */
	int mask = 0;

	if (mode & IORead)
		mask |= TK_READABLE;

	if (mode & IOWrite)
		mask |= TK_WRITABLE;

	if (mode & IOSelect)
		Error (ErrWarn, "AddChannel", "select condition ignored");

	if (mask) {
		Tk_CreateFileHandler (fd, mask, ioHandler, (ClientData) ch);
		ReadCount++;
		Active [fd] = TRUE;
	}
}

void
UchTkMultiplexer :: FireTimers (ClientData mpx)
{
	CcuCoreTimer::Fire (((UchTkMultiplexer*) mpx)->GetTimerSet ());
}

void
UchTkMultiplexer :: SetTimeOut (Millisecond delay)
{
	TimeOut = Tk_CreateTimerHandler (int (delay), &UchTkMultiplexer::FireTimers, (ClientData) this);
}

void
UchTkMultiplexer :: SuppressTimeOut ()
{
	Tk_DeleteTimerHandler (TimeOut);
	TimeOut = 0;
}

void
UchTkMultiplexer :: FireSignals (ClientData mpx)
{
	((UchTkMultiplexer*) mpx)->HandleDeferredSignals ();
}

void
UchTkMultiplexer :: AddSignalHook ()
{
	Tk_DoWhenIdle (&UchTkMultiplexer::FireSignals, (ClientData) this);
}
		
MPX_RES
UchTkMultiplexer :: Loop ()
{
	Looping = TRUE;

	Tk_MainLoop ();

	if (Looping) {
		Looping = FALSE;
		return isMpxEmpty;
	}
	return isMpxTerminated;
}