gmane.comp.programming.vala

[Vala] Fwd: Error in `./gtk_foobar_sample': double free orcorruption (!prev)

Nadav Vinik — 2013-06-19T19:03:30

Hello

I got this error only if cap.next catch packet with len more then zero:

/*packet = */cap.next(out header);
stdout.printf("Got packet caplen = %d\n", header.len);

I convert the code from "a.c" which it run well there.
taken from:
http://www.tcpdump.org/pcap.html

pcap vapi taken from:
https://github.com/apmasell/vapis/blob/master/libpcap.vapi

Vala 0.20.1

Thanks
Nadav

$ sudo ./gtk_foobar_sample
Got packet caplen = 90
*** Error in `./gtk_foobar_sample': double free or corruption (!prev):
0x00000000018e4370 ***
======= Backtrace: =========
/lib/x86_64-linux-gnu/libc.so.6(+0x80a46)[0x7f85cd0d6a46]
/usr/lib/x86_64-linux-gnu/libpcap.so.0.8(+0x696a)[0x7f85cd42496a]
/usr/lib/x86_64-linux-gnu/libpcap.so.0.8(pcap_close+0x1e)[0x7f85cd42b2fe]
./gtk_foobar_sample(main+0xd5)[0x4012f5]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf5)[0x7f85cd077ea5]
./gtk_foobar_sample[0x40139d]
======= Memory map: ========
00400000-00403000 r-xp 00000000 08:0b 13320688
/media/debian-home/nadav3/tmp/gtk-foobar-sample/src/

Re: [Vala] threads in vala

Eric Gregory — 2013-06-19T18:12:43


No, as the name suggests it's an asynchronous method.  If you need threads,
have a look at GLib.Thread:
http://www.valadoc.org/#!api=glib-2.0/GLib.Thread

Regarding the yield error, note that yields must be inside an async method

[Vala] threads in vala

Nadav Vinik — 2013-06-19T05:39:30

Hello

I try to write a program with vala to display some network packets with
pcap,

I use async method to the infinite loop however it still cause the program
to stuck.

Does the async method is not a real thread?

if I call to yield inside the pcap loop inside the async method I get an
error:  "yield expression not available outside async method"

example code:

public void on_btn_click (Button b)
    {

          fill_list_with_pcap.begin((obj, res) => {
            fill_list_with_pcap.end(res);
            loop.quit();
        });
        loop.run();
}

private async void fill_list_with_pcap() {
     cap.loop(-1,(header, data) => {
          yield sleep_async (100, new Cancellable ());
      }
}

compile with vala 0.18.1


Thanks
Nadav

Re: [Vala] Little things in Vala design?

Steven Oliver — 2013-06-17T14:50:33

What quirks exactly were you talking about? The article read more
comparative than anything?

Steven N. Oliver


On Sun, Jun 16, 2013 at 11:57 PM, Mario Daniel Ruiz Saavedra <
desiderantes-ur4TIblo6goN+BqQ9rBEUg< at >public.gmane.org> wrote:

[Vala] Implementing Tracing Functionality in Vala

Anirudh Sanjeev — 2013-06-17T13:49:13

Hi,

I am working to add Tracing Functionality to Vala, and can use some help on
which direction to take.

What is Tracing Functionality?
=========================
When you compile with the "--trace" flag, and run a vala program, every
time a Vala Function (not a library/System function) is called, a message
is printed in your console.

For example, if you have a program like
function foo(int x) {
  // do something
}

int main() {
  foo (42);
}

And you run this program, there will be an output like:
[TRACE] foo(42)

I am modelling this on Mono's Tracing functionality [1]

Why is tracing functionality useful?
=============================
It will help vastly while debugging and for a new contributor to quickly
identify the code path, so he/she can identify the relevant functions which
are executed when a bug is reproduced or a feature is activated.

This gives a much better starting point for people unfamiliar with the
codebase, which I hope will be orders of magnitude more productive than
"grep"ping the cod

[Vala] Little things in Vala design?

Mario Daniel Ruiz Saavedra — 2013-06-17T03:57:54

Looking at [http://lwn.net/SubscriberLink/553131/f8a66b10c5cbd80f/] i wonder, how much of those little quirks are shared by vala? Can those be axed?

_______________________________________________
Mario Daniel Ruiz Saavedra
Estudiante Ing. Sistemas - Uninorte
mruizd-JMgHAozgOv0PQx2L+B5UNQ< at >public.gmane.org - identi.ca/desiderantes

Re: [Vala] [OT] Software for community alarms.

Edwin De La Cruz — 2013-06-14T12:19:47

El 14/06/13 07:16, Daniel Espinosa escribió:
I used the postgresql binding to Vala and has given me no problem, it 
has been relatively easy.
_______________________________________________
vala-list mailing list
vala-list-rDKQcyrBJuzYtjvyW6yDsg< at >public.gmane.org
https://mail.gnome.org/mailman/listinfo/vala-list

Re: [Vala] [OT] Software for community alarms.

Daniel Espinosa — 2013-06-14T12:16:47

May you want to test LIBGDA's Vala bindins and its Vala Extensions. I've
contributed to, in order to bring Django equivalent to Vala, using LIBGDA
and bring it to other languages using GObject Introspection.
El jun 13, 2013 10:25 p.m., "Edwin De La Cruz" <edwinspire< at >gmail.com>
escribió:

_______________________________________________
vala-list mailing list
vala-list< at >gnome.org
https://mail.gnome.org/mailman/listinfo/vala-list

[Vala] [OT] Software for community alarms.

Edwin De La Cruz — 2013-06-14T03:24:44

Best regards to all.
I am developing a software for community alarms with sms notifications, 
fully automatic, PostgreSQL database, web GUI using a micro HTTP server 
(which I have also developed), HTML, Dojo, Ajax, OpenStreetMap and Vala 
programming language.

Years ago I had conceived the idea but written in C # and running on 
Windows, but abandoned the project.
Now that I am a follower of Vala since I met him I have returned to 
recreate the project from 0 to the characteristics I mentioned earlier.

I would like to share the project and give me their opinion or point of 
view is very important to me your opinion as professionals and users.

Software testing I have done on Debian 7 without any problem.

Opensource software, it can download and install on the following page:
http://usaga-software.edwinspire.com/

or

https://github.com/edwinspire/usaga

A preliminary video software
http://youtu.be/dB5ulneLIvQ

All opinions are welcome.
_______________________________________________
vala-list mailing lis

Re: [Vala] Handling multiline strings

Satyajit Sahoo — 2013-06-10T19:43:01

Thanks. That was of great help.


On 11 June 2013 00:09, Evan Nemerson <evan-H/B4sTsTNzqZox4op4iWzw< at >public.gmane.org> wrote:

Re: [Vala] Handling multiline strings

Evan Nemerson — 2013-06-10T18:39:20

You can't, though instead of relying on verbatim strings you could do
something like

string foo = ("Line 1 and %s\n" +
              "Line 2 and %s\n" +
              "Line 3\n" +
              "Line 4").printf (var1, var2);

Note that method calls have a higher priority than string concatenation,
which is why I enclosed the strings in parenthesis.  Without the method
call you could just do

string foo = "Line 1 and %s\n" +
             "Line 2 and %s\n" +
             "Line 3\n" +
             "Line 4";

-Evan

Re: [Vala] Handling multiline strings

Satyajit Sahoo — 2013-06-10T17:43:23

Yeah. I'm using what Mario suggested. I just needed a better looking
alternative. I guess I want to avoid string manipulation and stay that way
:(


On 10 June 2013 20:06, Craig <weberc2-Re5JQEeQqe8AvxtiuMwx3w< at >public.gmane.org> wrote:

Re: [Vala] Handling multiline strings

Craig — 2013-06-10T14:36:39

Alternatively, if you want the string literal to look presentable and you
know it will l not have tabs, you can strip said tabs from the string. But
generally Mario's suggestion is preferred, I think.
On Jun 10, 2013 8:04 AM, "Mario Daniel Ruiz Saavedra" <
desiderantes-ur4TIblo6goN+BqQ9rBEUg< at >public.gmane.org> wrote:

Re: [Vala] Handling multiline strings

Mario Daniel Ruiz Saavedra — 2013-06-10T13:03:51

Use: string new = "Line 1 and %s\nLine 2 and %s\nLine 3\nLine 4".printf(var1,var2);
_______________________________________________
Mario Daniel Ruiz Saavedra
Estudiante Ing. Sistemas - Uninorte
mruizd-JMgHAozgOv0PQx2L+B5UNQ< at >public.gmane.org - identi.ca/desiderantes

-----Original Message-----
From: Satyajit Sahoo <satyajit.happy-Re5JQEeQqe8AvxtiuMwx3w< at >public.gmane.org>
Sender: "vala-list" <vala-list-bounces-rDKQcyrBJuzYtjvyW6yDsg< at >public.gmane.org>
Date: Mon, 10 Jun 2013 18:22:49 
To: vala-list<vala-list-rDKQcyrBJuzYtjvyW6yDsg< at >public.gmane.org>
Subject: [Vala] Handling multiline strings

Hi. I'm trying to write a multiline string into a file,

e.g.

string new = """Line 1 and %s

Line 2 and %s

Line 3

Line 4""".printf (var1, var2);

The problem is, when I write it to the file, the lines from the 2nd line,
have tab characters preceding them. I want to keep the idention level of
the code to improve redability. How can I make it ignore the tabs used for
code indention while writing to the file?

[Vala] Handling multiline strings

Satyajit Sahoo — 2013-06-10T12:52:49

Hi. I'm trying to write a multiline string into a file,

e.g.

string new = """Line 1 and %s

Line 2 and %s

Line 3

Line 4""".printf (var1, var2);

The problem is, when I write it to the file, the lines from the 2nd line,
have tab characters preceding them. I want to keep the idention level of
the code to improve redability. How can I make it ignore the tabs used for
code indention while writing to the file?

[Vala] RELEASE: Vala 0.20.1 + GTK 3.6.4 for Win32

2013-06-09T08:10:10

Hello people, 

I'm pleased to announce the availability of a Win32 bundle for Vala 0.20.1. 

Download link here :
http://www.tarnyko.net/en/?q=node/35
or here :
http://www.tarnyko.net/dl/vala.htm 

It now contains GTK+ 3.6.4 as it is considered stable enough, and so the 
install mimics the one you can find in Ubuntu Raring e.g. 

Bundled GTK+2 has been updated to the latest 2.24.18, too. 

For ValaWinPKG users, a repo will follow quickly. In should appear directly 
in the software when it is ready. 


Regards,
Tarnyko

[Vala] Internazionalize genie program

Alejandro T. Colombini — 2013-06-06T11:11:56

2013/6/3 Gontzal Uriarte <txasatonga-Re5JQEeQqe8AvxtiuMwx3w< at >public.gmane.org>


Hi,
  if you are using Autotools, you can follow this manual[1], I used it with
C and also in a Vala porject, the onliy difference is in the sorce code,
but using valadoc.org documentation you should find any C symbol for its
transaltion to Vala or Genie, I guess.

  Another approach, if you use the Anjuta IDE, is to generate a Vala
project with it and get some inspiration from the generated Autotools
configuration. Maybe this is not the best option, but if you get the
Autotools and gettext manuals and learn what the macros and all the stuff
you use do, you may learn a lot this way (at least I did). Anyway, Trying
it by yourself first is the best approach, if you have the time.

[1] http://people.gnome.org/~malcolm/i18n/

[Vala] Internazionalize genie program

Gontzal Uriarte — 2013-06-03T17:29:51

Hello:
How can I internationalize a genie program using Glib.intl

Thanks.

Re: [Vala] Use alpha in GtkColorButton in GTK3 with Vala

Satyajit Sahoo — 2013-06-02T04:47:20

Thanks all. It works perfectly. I hope the code samples in valadoc.org can
be updated though.


On 2 June 2013 02:41, Evan Nemerson <evan-H/B4sTsTNzqZox4op4iWzw< at >public.gmane.org> wrote:

Re: [Vala] Use alpha in GtkColorButton in GTK3 with Vala

Evan Nemerson — 2013-06-01T21:11:26

You can cast to Gtk.ColorChooser:

  ((Gtk.ColorChooser) myButton).set_use_alpha (true);

Unfortunately, we can't really "fix" the bindings right now since
removing Gtk.ColorButton.set_use_alpha means that the bindings stop
working for older versions of GTK+.

At some point we may be able to mostly resolve this in valac (after
switching GTK+ to GIR and once Florian's recent work on the [Version]
attribute lands) by introducing a flag to remove deprecated items from
the tree when targeting a newer version of the library.


-Evan

_______________________________________________
vala-list mailing list
vala-list< at >gnome.org
https://mail.gnome.org/mailman/listinfo/vala-list

Re: [Vala] Use alpha in GtkColorButton in GTK3 with Vala

Jonas Kulla — 2013-06-01T20:27:07

2013/6/1 Satyajit Sahoo <satyajit.happy-Re5JQEeQqe8AvxtiuMwx3w< at >public.gmane.org>


Hi,

looking at the documentation, it seems that the "use-alpha" property
was moved out of ColorButton (and probably other color widgets)
and unified in the ColorChooser interface, but left in those concrete
classes for backwards compatibility. The problem I think is that
when you do "myButton.set_use_alpha()" valac cannot know if you
mean ColorButton::set_use_alpha or ColorChooser::set_use_alpha
and just defaults to the former.

Normally I would tell you to just ignore warnings that gcc spits out
(as there are others caused by bugs in valac), but if you really want
them gone you could remove all the use-alpha related calls from
the ColorButton class in the gtk3 vapi (although others compiling
your project would still get them).

Jonas