def Merge(e1,e2):
e = None
def prepare():
e.fresh = False
for l in e.listeners.itervalues():
l.prepare()
def push1(x1):
if e2.fresh or e2.cell.get() != None:
x2 = e2.cell.get()
for l in e.listeners.itervalues():
l.push((x1,x2))
e2.cell.set(None)
else:
e1.cell.set(x1)
def push2(x2):
if e1.fresh or e1.cell.get() != None:
x1 = e1.cell.get()
for l in e.listeners.itervalues():
l.push((x1,x2))
e1.cell.set(None)
else:
e2.cell.set(x2)
def finish():
x1 = e1.cell.get()
x2 = e2.cell.get()
e1.cell.set(None)
e2.cell.set(None)
if x2 != None:
for l in e.listeners.itervalues():
l.push((None,x2))
if x1 != None:
for l in e.listeners.itervalues():
l.push((x1,None))
for l in e.listeners.itervalues():
l.finish()
e.fresh = True
def terminate1():
e.term1 = True
if e.term2:
for l in e.listeners.itervalues():
l.terminate()
def terminate2():
e.term2 = True
if e.term1:
for l in e.listeners.itervalues():
l.terminate()
e1.add_listener(FListener(prepare,push1,finish,terminate1))
e2.add_listener(FListener(prepare,push2,finish,terminate2))
if e1.type is None or e2.type is None:
out_type = None
else:
# TODO(astory): option
out_type = types.FType((e1.type.type, e2.type.type))
e = FEvent(type=out_type)
e.term1 = False
e.term2 = False
e1.cell = util.FRef()
e2.cell = util.FRef()
return e
def Merge(e1, e2):
e = None
def prepare():
e.fresh = False
for l in e.listeners.itervalues():
l.prepare()
def push1(x1):
if e2.fresh or e2.cell.get() != None:
x2 = e2.cell.get()
for l in e.listeners.itervalues():
l.push((x1, x2))
e2.cell.set(None)
else:
e1.cell.set(x1)
def push2(x2):
if e1.fresh or e1.cell.get() != None:
x1 = e1.cell.get()
for l in e.listeners.itervalues():
l.push((x1, x2))
e1.cell.set(None)
else:
e2.cell.set(x2)
def finish():
x1 = e1.cell.get()
x2 = e2.cell.get()
e1.cell.set(None)
e2.cell.set(None)
if x2 != None:
for l in e.listeners.itervalues():
l.push((None, x2))
if x1 != None:
for l in e.listeners.itervalues():
l.push((x1, None))
for l in e.listeners.itervalues():
l.finish()
e.fresh = True
def terminate1():
e.term1 = True
if e.term2:
for l in e.listeners.itervalues():
l.terminate()
def terminate2():
e.term2 = True
if e.term1:
for l in e.listeners.itervalues():
l.terminate()
e1.add_listener(FListener(prepare, push1, finish, terminate1))
e2.add_listener(FListener(prepare, push2, finish, terminate2))
if e1.type is None or e2.type is None:
out_type = None
else:
# TODO(astory): option
out_type = types.FType((e1.type.type, e2.type.type))
e = FEvent(type=out_type)
e.term1 = False
e.term2 = False
e1.cell = util.FRef()
e2.cell = util.FRef()
return e
