Hallo Alltogether,
I've searched in this mailing list, but it seems to me that there is no general
approach to pass exceptions from one thread to another.
I think most application do a unique way of handling "unhandled exceptions", at
least they (should) try to log them.
The following discussion seems to me most valuable (Sorry for the long URL, I
don't know a way of shorter) http://groups.google.de/group/comp.l...820c20ff3fcea8 http://groups.google.de/group/comp.l...8a8d9e85883fe3
I've the feeling that if you're using the python class threading.Threa d you've a
unique interface of handling it. (thread synchronizing + exception raising)
But' when you've a C++ extension, that uses it's own thread implementation and
your exceptions happens in python code (but from a thread that is controlled by
your extension) you have another problem.
Maybe I've overseen something in the python docu, so I ask for the solutions,
concepts, hints ... you solved the problem.
Regards
Alexander 2  2102 
Alexander Eisenhuth wrote:
Hallo Alltogether,
I've searched in this mailing list, but it seems to me that there is no
general approach to pass exceptions from one thread to another.
Very few languages have that.
Actually, it could be made to work for Python, but it would have to
be carefully designed. Something that raises an exception in another
thread the next time the thread blocks would have relatively sane
semantics. You couldn't raise an exception on a compute-bound thread,
only at block points (locks, I/O, long system calls.)
John Nagle
John Nagle schrieb:
Alexander Eisenhuth wrote:
>Hallo Alltogether,
I've searched in this mailing list, but it seems to me that there is
no general approach to pass exceptions from one thread to another.
Very few languages have that.
Actually, it could be made to work for Python, but it would have to
be carefully designed. Something that raises an exception in another
thread the next time the thread blocks would have relatively sane
semantics. You couldn't raise an exception on a compute-bound thread,
only at block points (locks, I/O, long system calls.)
John Nagle
Yes you're right, it must be well designed with a clear responsibility
delegation. I can imgagine the following points:
- Thread termination with termination handler (for Thread instance)
- Main Thread information / synchronisation
- Default/Customized main thread exception handler This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics | |
by: Roy Smith |
last post by:
What is supposed to happen when an exception is raised and not caught in
a thread? The Reference Manual (section 4.2) states "When an exception
is not handled at all, the interpreter terminates execution of the
program, or returns to its interactive main loop", but it looks like
what really happens is the thread is terminated, not the whole program.
If I run the following:
-------
#!/usr/bin/env python
|
by: Steven Bethard |
last post by:
I feel like this has probably been answered before, but I couldn't
find something quite like it in the archives. Feel free to point me
somewhere if you know where this has already been answered.
I have a list in a particular order that I want to split into two
lists: the list of every nth item, and the list of remaining items.
It's important to maintain the original order in both lists.
So the first list is simple:
|
by: Shane Groff |
last post by:
I know this is a recurring discussion (I've spent the last 3 days
reading through threads on the topic), but I feel compelled to start
it up again.
After reading through the existing threads, I find myself convinced
that exceptions are a better mechanism, for example because
constructors and operators can't return errors, and code that doesn't
need to handle/translate/recover in the face of errors, but can just
propagate the error is...
|
by: Einar Høst |
last post by:
Hi,
I'm getting into the Trace-functionality in .NET, using it to provide some
much-needed logging across dlls in the project we're working on. However,
being a newbie, I'm wondering if some more experienced loggers can provide
me with some ideas as to how to log in a simple yet flexible manner. For
instance, I'd like the code to be as uncluttered as possible by Trace
statements.
As an example of basic logging functionality, I've come...
|
by: Sako |
last post by:
I am trying to teach myself perl by writing a program I've been meaning
to implement, so I am pretty green in perl. I'm having problems sharing
filehandles opened by a thread - been RTFM for a few days, but am having
no luck.
I am attempting to write a threaded server program that listens on a
socket for requests, then passes the socket's filehandle to an event
processor routine, while the listener thread keeps on listening.
However, I...
| | |
by: robert |
last post by:
I get python crashes and (in better cases) strange Python exceptions when (in most cases) importing and using cookielib lazy on demand in a thread.
It is mainly with cookielib, but remember the problem also with other imports (e.g. urllib2 etc.).
And again very often in all these cases where I get weired Python exceptions, the problem is around re-functions - usually during re.compile calls during import (see some of the exceptions below). But...
|
by: Pieter |
last post by:
Hi,
For some procedures that throws exceptions, I would like to show different
messages to the user depending on what type of exception he's getting. For
instance this one: when the file is locked, I want a messagebox to tell that
the user has to close the file first.
Is there a way to identify an exception by some kind of unique number or
something like this? I don't want to identify it on the Exception Message
because some users are...
|
by: james |
last post by:
Hi all,
I have a console app that uses
AppDomain.CurrentDomain.UnhandledException. However it only seems to
catch exceptions in the current thread. Exceptions in other threads
(like from a timer) don't seem to get reported at all (and my
application keeps running). How do I catch unhandled exceptions in
other threads?
-James
|
by: marktang |
last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main usage, and What is the difference between ONU and Router. Let’s take a closer look !
Part I. Meaning of...
|
by: Hystou |
last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it.
First, let's disable language synchronization. With a Microsoft account, language settings sync across devices. To prevent any complications,...
|
by: Oralloy |
last post by:
Hello folks,
I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>".
The problem is that using the GNU compilers, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed.
This is as boiled down as I can make it.
Here is my compilation command:
g++-12 -std=c++20 -Wnarrowing bit_field.cpp
Here is the code in...
| | |
by: Hystou |
last post by:
Overview:
Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows Update option using the Control Panel or Settings app; it automatically checks for updates and installs any it finds, whether you like it or not. For most users, this new feature is actually very convenient. If you want to control the update process,...
|
by: agi2029 |
last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing, and deployment—without human intervention. Imagine an AI that can take a project description, break it down, write the code, debug it, and then launch it, all on its own....
Now, this would greatly impact the work of software developers. The idea...
|
by: isladogs |
last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM).
In this session, we are pleased to welcome a new presenter, Adolph Dupré who will be discussing some powerful techniques for using class modules.
He will explain when you may want to use classes instead of User Defined Types (UDT). For example, to manage the data in unbound forms.
Adolph will...
|
by: conductexam |
last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one.
At the time of converting from word file to html my equations which are in the word document file was convert into image.
Globals.ThisAddIn.Application.ActiveDocument.Select();...
|
by: TSSRALBI |
last post by:
Hello
I'm a network technician in training and I need your help.
I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs.
The last exercise I practiced was to create a LAN-to-LAN VPN between two Pfsense firewalls, by using IPSEC protocols.
I succeeded, with both firewalls in the same network. But I'm wondering if it's possible to do the same thing, with 2 Pfsense firewalls...
|
by: adsilva |
last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
| |
