126 lines
3.8 KiB
Python
126 lines
3.8 KiB
Python
# ex:ts=4:sw=4:sts=4:et
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# -*- tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*-
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#
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# Copyright (C) 2006 - 2007 Michael 'Mickey' Lauer
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# Copyright (C) 2006 - 2007 Richard Purdie
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License version 2 as
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# published by the Free Software Foundation.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License along
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# with this program; if not, write to the Free Software Foundation, Inc.,
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# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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"""
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Use this class to fork off a thread to recieve event callbacks from the bitbake
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server and queue them for the UI to process. This process must be used to avoid
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client/server deadlocks.
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"""
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import socket, threading, pickle
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from SimpleXMLRPCServer import SimpleXMLRPCServer, SimpleXMLRPCRequestHandler
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class BBUIEventQueue:
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def __init__(self, BBServer):
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self.eventQueue = []
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self.eventQueueLock = threading.Lock()
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self.eventQueueNotify = threading.Event()
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self.BBServer = BBServer
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self.t = threading.Thread()
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self.t.setDaemon(True)
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self.t.run = self.startCallbackHandler
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self.t.start()
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def getEvent(self):
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self.eventQueueLock.acquire()
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if len(self.eventQueue) == 0:
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self.eventQueueLock.release()
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return None
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item = self.eventQueue.pop(0)
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if len(self.eventQueue) == 0:
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self.eventQueueNotify.clear()
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self.eventQueueLock.release()
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return item
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def waitEvent(self, delay):
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self.eventQueueNotify.wait(delay)
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return self.getEvent()
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def queue_event(self, event):
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self.eventQueueLock.acquire()
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self.eventQueue.append(pickle.loads(event))
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self.eventQueueNotify.set()
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self.eventQueueLock.release()
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def startCallbackHandler(self):
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server = UIXMLRPCServer()
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self.host, self.port = server.socket.getsockname()
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server.register_function( self.system_quit, "event.quit" )
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server.register_function( self.queue_event, "event.send" )
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server.socket.settimeout(1)
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self.EventHandle = self.BBServer.registerEventHandler(self.host, self.port)
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self.server = server
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while not server.quit:
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server.handle_request()
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server.server_close()
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def system_quit( self ):
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"""
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Shut down the callback thread
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"""
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try:
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self.BBServer.unregisterEventHandler(self.EventHandle)
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except:
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pass
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self.server.quit = True
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class UIXMLRPCServer (SimpleXMLRPCServer):
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def __init__( self, interface = ("localhost", 0) ):
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self.quit = False
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SimpleXMLRPCServer.__init__( self,
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interface,
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requestHandler=SimpleXMLRPCRequestHandler,
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logRequests=False, allow_none=True)
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def get_request(self):
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while not self.quit:
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try:
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sock, addr = self.socket.accept()
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sock.settimeout(1)
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return (sock, addr)
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except socket.timeout:
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pass
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return (None,None)
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def close_request(self, request):
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if request is None:
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return
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SimpleXMLRPCServer.close_request(self, request)
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def process_request(self, request, client_address):
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if request is None:
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return
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SimpleXMLRPCServer.process_request(self, request, client_address)
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