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protocols/broadcast,sync_struct: add disconnect callback

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This commit is contained in:
Sebastien Bourdeauducq 2017-01-30 10:47:56 +08:00
parent 43aad0914e
commit dcea48a52d
2 changed files with 36 additions and 22 deletions
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8
artiq/protocols/broadcast.py
View File

@ -9,11 +9,12 @@ _init_string = b"ARTIQ broadcast\n"
class Receiver:
def __init__(self, name, notify_cb):
def __init__(self, name, notify_cb, disconnect_cb=None):
self.name = name
if not isinstance(notify_cb, list):
notify_cb = [notify_cb]
self.notify_cbs = notify_cb
self.disconnect_cb = disconnect_cb
async def connect(self, host, port):
self.reader, self.writer = \
@ -29,6 +30,7 @@ class Receiver:
raise
async def close(self):
self.disconnect_cb = None
try:
self.receive_task.cancel()
try:
@ -41,6 +43,7 @@ class Receiver:
del self.writer
async def _receive_cr(self):
try:
target = None
while True:
line = await self.reader.readline()
@ -50,6 +53,9 @@ class Receiver:
for notify_cb in self.notify_cbs:
notify_cb(obj)
finally:
if self.disconnect_cb is not None:
self.disconnect_cb()
class Broadcaster(AsyncioServer):

10
artiq/protocols/sync_struct.py
View File

@ -52,8 +52,10 @@ class Subscriber:
from the publisher. The mod is passed as parameter. The function is
called after the mod has been processed.
A list of functions may also be used, and they will be called in turn.
:param disconnect_cb: An optional function called when disconnection happens
from external causes (i.e. not when ``close`` is called).
"""
def __init__(self, notifier_name, target_builder, notify_cb=None):
def __init__(self, notifier_name, target_builder, notify_cb=None, disconnect_cb=None):
self.notifier_name = notifier_name
self.target_builder = target_builder
if notify_cb is None:
@ -61,6 +63,7 @@ class Subscriber:
if not isinstance(notify_cb, list):
notify_cb = [notify_cb]
self.notify_cbs = notify_cb
self.disconnect_cb = disconnect_cb
async def connect(self, host, port, before_receive_cb=None):
self.reader, self.writer = \
@ -78,6 +81,7 @@ class Subscriber:
raise
async def close(self):
self.disconnect_cb = None
try:
self.receive_task.cancel()
try:
@ -90,6 +94,7 @@ class Subscriber:
del self.writer
async def _receive_cr(self):
try:
target = None
while True:
line = await self.reader.readline()
@ -104,6 +109,9 @@ class Subscriber:
for notify_cb in self.notify_cbs:
notify_cb(mod)
finally:
if self.disconnect_cb is not None:
self.disconnect_cb()
class Notifier: