在線程內調用dbus方法時,我收到了segfaults。這是我的場景:我有一個暴露方法測試的程序Service1。第二個程序Service2公開了一個方法公開。由於此方法進行了一些嚴格的數值計算,我將一些參數從公開傳遞給正在運行的線程閱讀器。該線程在結束工作時調用Service1的方法測試。我在上次dbus調用中發現段錯誤。在線程中調用dbus-python
代碼:
# Service1.py
class Service1(Object):
def __init__(self, bus):
name = BusName('com.example.Service1', bus)
path = '/'
super(Service1, self).__init__(name, path)
@method(dbus_interface='com.example.Service1',
in_signature='s', out_signature='s')
def test(self, test):
print 'test being called'
return test
dbus_loop = DBusGMainLoop()
dsession = SessionBus(mainloop=dbus_loop)
loop = gobject.MainLoop()
gobject.threads_init()
im = Service1(dsession)
loop.run()
# Service2.py
dbus_loop = DBusGMainLoop()
dsession = SessionBus(mainloop=dbus_loop)
class Service2(Object):
def __init__(self, bus):
name = BusName('com.example.Service2', bus)
super(Service2, self).__init__(name, '/')
self.queue = Queue()
self.db = bus.get_object('com.example.Service1', '/')
self.dbi = dbus.Interface(self.db, dbus_interface='com.example.Service1')
@method(dbus_interface='com.example.Service2',
in_signature='', out_signature='')
def expose(self):
print 'calling expose'
self.queue.put(('params',))
def reader(self):
while True:
val = self.queue.get()
dd = self.dbi.test('test')
print dd
self.queue.task_done()
gobject.threads_init()
loop = gobject.MainLoop()
im = Service2(dsession)
reader = threading.Thread(target=im.reader)
reader.start()
loop.run()
要進行測試,運行Service1.py,Service2.py後來這個片段:
dbus_loop = DBusGMainLoop()
session = SessionBus(mainloop=dbus_loop)
proxy = session.get_object('com.example.Service2', '/')
test_i = dbus.Interface(proxy, dbus_interface='com.example.Service2')
test_i.expose()
Service2.py應該運行此代碼後幾次崩潰。但爲什麼?
我認爲這個http://jameswestby.net/weblog/tech/14-caution-python-multiprocessing-and-glib-dont-mix.html可能與我的問題有關 – Sergio 2011-06-17 10:56:17