One possible way to avoid reentrancy could be to use idle handlers.
Example:
def my_callback(args):
obj, arg1, arg, ... = args
# ....
return False
# ...
some_object.connect("signal-name", lambda obj, arg1, arg2, ...:
gobject.idle_add(my_callback, (obj, arg1, arg, ...))
Given how much run-time oriented python is, it should be fairly easy
to make a generic proxy function or class that takes care of this
easily, like this:
class IdleHandlerProxy(object):
def __init__(self, callback):
self.__cb = callback
def __call__(self, *args):
gobject.idle_add(self.__proxy_func, args)
def __proxy_func(self, *args):
self.__cb(*args)
return False
then:
some_object.connect("signal-name", IdleHandlerProxy(my_callback), data)
Warning: code is untested.
A Qui, 2004-01-15 �s 22:58, Tim Newsham escreveu:
> Hi,
> I recently tracked down a bug in my gtk/python app. The cause is
> that one of the GTK signal handlers I have is being invoked in
> a reentrant manner. I'm unsure what the best/proper way to deal
> with this is.
>
> Here's a quick description of what's going on. I have a handler
> for button click events. When a button click is received, I
> construct a GtkMenu and pop it up for the user to select something.
> The menu has items in it that connect to callback functions when
> selected. Now what is happening is that if the user clicks several
> times rapidly, the menu items show up and the user can rapidly
> select two menu items. When the function for handling this selection
> is invoked, it must do something internally which allows gtk to
> process some more signals, because the same handler is then invoked
> again before it is finished handling the first selection.
>
> My question is.. what is the "right" way, or at least a good way
> of handling this in GTK and PyGTK in particular? Since I am
> using context menus in a number of places in a similar fashion
> I fear there may be other race conditions like this in my code.
> I would like to have a good mechanism for serializing the use
> of the context menu. I think one solution would be if all other
> gtk interactions were disabled while a context menu was active
> (if this isnt already the case). Would that work or would I just
> be making the race smaller?
>
> Tim N.
>
> _______________________________________________
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> Read the PyGTK FAQ: http://www.async.com.br/faq/pygtk/
--
Gustavo J. A. M. Carneiro
<[EMAIL PROTECTED]> <[EMAIL PROTECTED]>
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