1 files changed, 0 insertions, 106 deletions
diff --git a/Demo/sgi/video/vtime.py b/Demo/sgi/video/vtime.py
deleted file mode 100755
index c333e57..0000000
--- a/Demo/sgi/video/vtime.py
+++ /dev/null
@@ -1,106 +0,0 @@
-#
-# Module vtime - Keep virtual time between two nodes.
-#
-# We try for synchronised clocks by sending a packet of the for
-# (1,mytime,0) to the other side, and waiting (at most) a second for
-# a reply. This reply has the form (2,mytime,histime), and we can
-# estimate the time difference by defining histime to be exactly half-way
-# between the time we sent our message and got our reply. We send a
-# final (3,mynewtime,histime) message to allow the other side to do the
-# same computations.
-#
-# Note that the protocol suffers heavily from the 2-army problem.
-# It'll have to do until I can read up on time-sync protocols, though.
-#
-from socket import *
-import time
-
-MSGSIZE = 100
-MSGTIMEOUT = 1000
-
-recv_timeout = 'receive timeout'
-bad_connect = 'Bad connection'
-
-def timeavg(a,b):
-    return int((long(a)+b)/2L)
-def tryrecv(s):
-    cnt = 0
-    while 1:
-	if s.avail():
-	    return s.recvfrom(MSGSIZE)
-	time.millisleep(100)
-	cnt = cnt + 100
-	if cnt > MSGTIMEOUT:
-	    raise recv_timeout
-
-class VTime():
-    def init(self,(client,host,port)):
-	s = socket(AF_INET, SOCK_DGRAM)
-	host = gethostbyname(host)
-	localhost = gethostbyname(gethostname())
-	raddr = (host,port)
-	s.bind((localhost,port))
-	if client:
-	    #
-	    # We loop here because we want the *second* measurement
-	    # for accuracy
-	    for loopct in (0,2):
-		curtijd = time.millitimer()
-		check = `(loopct,curtijd,0)`
-		s.sendto(check,raddr)
-		while 1:
-		    try:
-			if loopct:
-			    data, other = s.recvfrom(MSGSIZE)
-			else:
-			    data, other = tryrecv(s)
-			newtijd = time.millitimer()
-			if other <> raddr:
-			    print 'Someone else syncing to us: ', other
-			    raise bad_connect
-			data = eval(data)
-			if data[:2] == (loopct+1,curtijd):
-			    break
-			if data[0] <> 2:
-			    print 'Illegal sync reply: ', data
-			    raise bad_connect
-		    except recv_timeout:
-			curtijd = time.millitimer()
-			check = `(loopct,curtijd,0)`
-			s.sendto(check,raddr)
-	    histime = data[2]
-	    s.sendto(`(4,newtijd,histime)`,raddr)
-	    mytime = timeavg(curtijd,newtijd)
-	    #mytime = curtijd
-	    self.timediff = histime - mytime
-	else:
-	    while 1:
-		data,other = s.recvfrom(MSGSIZE)
-		if other <> raddr:
-		    print 'Someone else syncing to us: ', other, ' Wanted ', raddr
-		    raise bad_connect
-		data = eval(data)
-		if data[0] in (0,2):
-		    curtijd = time.millitimer()
-		    s.sendto(`(data[0]+1,data[1],curtijd)`,raddr)
-		elif data[0] == 4:
-		    newtijd = time.millitimer()
-		    histime = data[1]
-		    mytime = timeavg(curtijd,newtijd)
-		    #mytime = curtijd
-		    self.timediff = histime-mytime
-		    break
-		else:
-		    print 'Funny data: ', data
-		    raise bad_connect
-	return self
-	#
-    def his2mine(self,tijd):
-	return tijd - self.timediff
-    #
-    def mine2his(self, tijd):
-	return tijd + self.timediff
-
-def test(clt, host, port):
-    xx = VTime().init(clt,host,port)
-    print 'Time diff: ', xx.his2mine(0)