[Gambas-user] A "Callback" function doesn't work.

[Ru Vuott]

Hello Jussi,

have you read Benoît's message ? Where he tells he seems to have been running my Gambas code  (...if I do not have mistranslated ) :

*******************
I can run your program with no crash if
********************


albeit with some precautions:


**********************************
1) I rewrite the code at line 62.

Dim status As Integer

client = jack_client_open(nomeClient, JackNullOption, VarPtr(status), Null)

(the status argument must be a pointer to a 'jack_status_t' that should
be an 'int')

2) I run the code from a module and not from a form. In other words,
outside of the QT4 GUI loop that does not like threads.
***********************************


He says he run from a module. So I'ld like to know if I have to create a new project without FMain/Form... and - if affermative - how can I launch it?


bye
vuott







--------------------------------------------
Gio 18/7/13, Jussi Lahtinen <jussi.lahtinen at ...626...> ha scritto:

 Oggetto: Re: [Gambas-user] A "Callback" function doesn't work.
 A: "mailing list for gambas users" <gambas-user at lists.sourceforge.net>
 Data: Giovedì 18 luglio 2013, 14:46
 
 > > Dim status As Short
 > >
 > > client = jack_client_open(nomeClient, options,
 > > VarPtr(status), Null)
 >
 
 
 > However... the relative compiled program was created,
 and launched in
 > Terminal I obtained this value:   4
 >
 
 OK, so with memcpy you should use sizeof(gb.Single).
 
 After these corrections I got SGN11 from libjack.
 
 Starting program: /usr/bin/gbx3
 [Thread debugging using libthread_db enabled]
 Using host libthread_db library
 "/lib/x86_64-linux-gnu/libthread_db.so.1".
 [New Thread 0x7fffe6ee9700 (LWP 5951)]
 [New Thread 0x7fffe6e68700 (LWP 5952)]
 Cannot lock down 82246176 byte memory area (Cannot allocate
 memory)
 0
 Campionamento = 44100
 [New Thread 0x7fffe6de7700 (LWP 5953)]
 
 Program received signal SIGSEGV, Segmentation fault.
 0x00007fffe6f0323c in ?? () from
 /usr/lib/x86_64-linux-gnu/libjack.so.0.1.0
 (gdb) bt
 #0  0x00007fffe6f0323c in ?? () from
 /usr/lib/x86_64-linux-gnu/libjack.so.0.1.0
 #1  0x00007fffffffc548 in ?? ()
 #2  0x0000000000006f9c in ?? ()
 #3  0x000000000000003d in ?? ()
 #4  0x0000000000000004 in ?? ()
 #5  0x0000000000000000 in ?? ()
 
 
 I don't know what is going on. If you really want to find
 out, maybe you
 should contact developers of jack,
 or compile libjack from sources with debugging information.
 Then I would
 think we could have more meaningful bt.
 
 But maybe we just missed something from the C to Gambas
 translation...
 
 Jussi
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