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# *****************************************************************************
# * Copyright (c) 2011, 2013-2014, 2016 Wind River Systems, Inc. and others.
# * All rights reserved. This program and the accompanying materials
# * are made available under the terms of the Eclipse Public License v1.0
# * which accompanies this distribution, and is available at
# * http://www.eclipse.org/legal/epl-v10.html
# *
# * Contributors:
# * Wind River Systems - initial API and implementation
# *****************************************************************************
from .. import memorymap
from ... import channel
from ...channel.Command import Command
class MemoryMapProxy(memorymap.MemoryMapService):
def __init__(self, channel):
self.channel = channel
self.listeners = {}
def get(self, contextID, done):
done = self._makeCallback(done)
service = self
class GetCommand(Command):
def __init__(self):
super(GetCommand, self).__init__(service.channel, service,
"get", (contextID,))
def done(self, error, args):
memMap = None
if not error:
assert len(args) == 2
error = self.toError(args[0])
if args[1]:
memMap = _toMemoryMap(args[1])
done.doneGet(self.token, error, memMap)
return GetCommand().token
def set(self, contextID, memMap, done):
if isinstance(memMap, memorymap.MemoryRegion) or \
isinstance(memMap, dict):
memMap = (memMap,)
done = self._makeCallback(done)
service = self
class SetCommand(Command):
def __init__(self):
super(SetCommand, self).__init__(service.channel, service,
"set", (contextID, memMap))
def done(self, error, args):
if not error:
assert len(args) == 1
error = self.toError(args[0])
done.doneSet(self.token, error)
return SetCommand().token
def addListener(self, listener):
l = ChannelEventListener(self, listener)
self.channel.addEventListener(self, l)
self.listeners[listener] = l
def removeListener(self, listener):
l = self.listeners.pop(listener, None)
if l:
self.channel.removeEventListener(self, l)
class ChannelEventListener(channel.EventListener):
def __init__(self, service, listener):
self.service = service
self.listener = listener
def event(self, name, data):
try:
args = channel.fromJSONSequence(data)
if name == "changed":
assert len(args) == 1
self.listener.changed(args[0])
else:
raise IOError("MemoryMap service: unknown event: " + name)
except Exception as x:
import sys
x.tb = sys.exc_info()[2]
self.service.channel.terminate(x)
def _toMemoryMap(o):
if o is None:
return None
return list(map(_toMemoryRegion, o))
def _toMemoryRegion(o):
if o is None:
return None
return memorymap.MemoryRegion(o)
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