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author | Tudor Florea <tudor.florea@enea.com> | 2015-10-09 22:59:03 +0200 |
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committer | Tudor Florea <tudor.florea@enea.com> | 2015-10-09 22:59:03 +0200 |
commit | 972dcfcdbfe75dcfeb777150c136576cf1a71e99 (patch) | |
tree | 97a61cd7e293d7ae9d56ef7ed0f81253365bb026 /bitbake/lib/bb/ui/uievent.py | |
download | poky-972dcfcdbfe75dcfeb777150c136576cf1a71e99.tar.gz |
initial commit for Enea Linux 5.0 arm
Signed-off-by: Tudor Florea <tudor.florea@enea.com>
Diffstat (limited to 'bitbake/lib/bb/ui/uievent.py')
-rw-r--r-- | bitbake/lib/bb/ui/uievent.py | 150 |
1 files changed, 150 insertions, 0 deletions
diff --git a/bitbake/lib/bb/ui/uievent.py b/bitbake/lib/bb/ui/uievent.py new file mode 100644 index 0000000000..c6b100c840 --- /dev/null +++ b/bitbake/lib/bb/ui/uievent.py | |||
@@ -0,0 +1,150 @@ | |||
1 | # ex:ts=4:sw=4:sts=4:et | ||
2 | # -*- tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*- | ||
3 | # | ||
4 | # Copyright (C) 2006 - 2007 Michael 'Mickey' Lauer | ||
5 | # Copyright (C) 2006 - 2007 Richard Purdie | ||
6 | # | ||
7 | # This program is free software; you can redistribute it and/or modify | ||
8 | # it under the terms of the GNU General Public License version 2 as | ||
9 | # published by the Free Software Foundation. | ||
10 | # | ||
11 | # This program is distributed in the hope that it will be useful, | ||
12 | # but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
13 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
14 | # GNU General Public License for more details. | ||
15 | # | ||
16 | # You should have received a copy of the GNU General Public License along | ||
17 | # with this program; if not, write to the Free Software Foundation, Inc., | ||
18 | # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | ||
19 | |||
20 | |||
21 | """ | ||
22 | Use this class to fork off a thread to recieve event callbacks from the bitbake | ||
23 | server and queue them for the UI to process. This process must be used to avoid | ||
24 | client/server deadlocks. | ||
25 | """ | ||
26 | |||
27 | import socket, threading, pickle | ||
28 | from SimpleXMLRPCServer import SimpleXMLRPCServer, SimpleXMLRPCRequestHandler | ||
29 | |||
30 | class BBUIEventQueue: | ||
31 | def __init__(self, BBServer, clientinfo=("localhost, 0")): | ||
32 | |||
33 | self.eventQueue = [] | ||
34 | self.eventQueueLock = threading.Lock() | ||
35 | self.eventQueueNotify = threading.Event() | ||
36 | |||
37 | self.BBServer = BBServer | ||
38 | self.clientinfo = clientinfo | ||
39 | |||
40 | server = UIXMLRPCServer(self.clientinfo) | ||
41 | self.host, self.port = server.socket.getsockname() | ||
42 | |||
43 | server.register_function( self.system_quit, "event.quit" ) | ||
44 | server.register_function( self.send_event, "event.sendpickle" ) | ||
45 | server.socket.settimeout(1) | ||
46 | |||
47 | self.EventHandler = None | ||
48 | count_tries = 0 | ||
49 | |||
50 | # the event handler registration may fail here due to cooker being in invalid state | ||
51 | # this is a transient situation, and we should retry a couple of times before | ||
52 | # giving up | ||
53 | |||
54 | while self.EventHandler == None and count_tries < 5: | ||
55 | self.EventHandle = self.BBServer.registerEventHandler(self.host, self.port) | ||
56 | |||
57 | if (self.EventHandle != None): | ||
58 | break | ||
59 | |||
60 | bb.warn("Could not register UI event handler %s:%d, retry" % (self.host, self.port)) | ||
61 | count_tries += 1 | ||
62 | import time | ||
63 | time.sleep(1) | ||
64 | |||
65 | |||
66 | if self.EventHandle == None: | ||
67 | raise Exception("Could not register UI event handler") | ||
68 | |||
69 | self.server = server | ||
70 | |||
71 | self.t = threading.Thread() | ||
72 | self.t.setDaemon(True) | ||
73 | self.t.run = self.startCallbackHandler | ||
74 | self.t.start() | ||
75 | |||
76 | def getEvent(self): | ||
77 | |||
78 | self.eventQueueLock.acquire() | ||
79 | |||
80 | if len(self.eventQueue) == 0: | ||
81 | self.eventQueueLock.release() | ||
82 | return None | ||
83 | |||
84 | item = self.eventQueue.pop(0) | ||
85 | |||
86 | if len(self.eventQueue) == 0: | ||
87 | self.eventQueueNotify.clear() | ||
88 | |||
89 | self.eventQueueLock.release() | ||
90 | return item | ||
91 | |||
92 | def waitEvent(self, delay): | ||
93 | self.eventQueueNotify.wait(delay) | ||
94 | return self.getEvent() | ||
95 | |||
96 | def queue_event(self, event): | ||
97 | self.eventQueueLock.acquire() | ||
98 | self.eventQueue.append(event) | ||
99 | self.eventQueueNotify.set() | ||
100 | self.eventQueueLock.release() | ||
101 | |||
102 | def send_event(self, event): | ||
103 | self.queue_event(pickle.loads(event)) | ||
104 | |||
105 | def startCallbackHandler(self): | ||
106 | |||
107 | self.server.timeout = 1 | ||
108 | while not self.server.quit: | ||
109 | self.server.handle_request() | ||
110 | self.server.server_close() | ||
111 | |||
112 | def system_quit( self ): | ||
113 | """ | ||
114 | Shut down the callback thread | ||
115 | """ | ||
116 | try: | ||
117 | self.BBServer.unregisterEventHandler(self.EventHandle) | ||
118 | except: | ||
119 | pass | ||
120 | self.server.quit = True | ||
121 | |||
122 | class UIXMLRPCServer (SimpleXMLRPCServer): | ||
123 | |||
124 | def __init__( self, interface ): | ||
125 | self.quit = False | ||
126 | SimpleXMLRPCServer.__init__( self, | ||
127 | interface, | ||
128 | requestHandler=SimpleXMLRPCRequestHandler, | ||
129 | logRequests=False, allow_none=True) | ||
130 | |||
131 | def get_request(self): | ||
132 | while not self.quit: | ||
133 | try: | ||
134 | sock, addr = self.socket.accept() | ||
135 | sock.settimeout(1) | ||
136 | return (sock, addr) | ||
137 | except socket.timeout: | ||
138 | pass | ||
139 | return (None, None) | ||
140 | |||
141 | def close_request(self, request): | ||
142 | if request is None: | ||
143 | return | ||
144 | SimpleXMLRPCServer.close_request(self, request) | ||
145 | |||
146 | def process_request(self, request, client_address): | ||
147 | if request is None: | ||
148 | return | ||
149 | SimpleXMLRPCServer.process_request(self, request, client_address) | ||
150 | |||