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9501864db8
There are much better ways to handle this and most editors shouldn't need this in modern times, drop the noise from the files. Its not consitently applied anyway. (Bitbake rev: 5e43070e3087d09aea2f459b033d035c5ef747d0) Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
149 lines
4.4 KiB
Python
149 lines
4.4 KiB
Python
#
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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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# SPDX-License-Identifier: GPL-2.0-only
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#
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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, collections
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from xmlrpc.server import SimpleXMLRPCServer, SimpleXMLRPCRequestHandler
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class BBUIEventQueue:
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def __init__(self, BBServer, clientinfo=("localhost, 0")):
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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.clientinfo = clientinfo
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server = UIXMLRPCServer(self.clientinfo)
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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.send_event, "event.sendpickle" )
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server.socket.settimeout(1)
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self.EventHandle = None
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# the event handler registration may fail here due to cooker being in invalid state
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# this is a transient situation, and we should retry a couple of times before
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# giving up
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for count_tries in range(5):
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ret = self.BBServer.registerEventHandler(self.host, self.port)
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if isinstance(ret, collections.Iterable):
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self.EventHandle, error = ret
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else:
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self.EventHandle = ret
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error = ""
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if self.EventHandle != None:
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break
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errmsg = "Could not register UI event handler. Error: %s, host %s, "\
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"port %d" % (error, self.host, self.port)
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bb.warn("%s, retry" % errmsg)
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import time
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time.sleep(1)
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else:
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raise Exception(errmsg)
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self.server = server
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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(event)
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self.eventQueueNotify.set()
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self.eventQueueLock.release()
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def send_event(self, event):
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self.queue_event(pickle.loads(event))
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def startCallbackHandler(self):
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self.server.timeout = 1
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bb.utils.set_process_name("UIEventQueue")
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while not self.server.quit:
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try:
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self.server.handle_request()
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except Exception as e:
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import traceback
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logger.error("BBUIEventQueue.startCallbackHandler: Exception while trying to handle request: %s\n%s" % (e, traceback.format_exc()))
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self.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 ):
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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, use_builtin_types=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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