[libvirt] Using callback under Windows compiling of libvirt library

[Dev.Atom]

I use libportablexdr 4.9.1 from the web site you indicate. I have compile it 
without any problem using the mingwin fedora environment (I have compile all 
under this environment), I haven't modified anything in the source, a simple 
configure like this :

./configure --host=i686-pc-mingw32 --prefix=/usr/i686-pc-mingw32/sys-root/mingw/

then, make and make install, nothing else.

Can explain me or point me on an explaination for registering event-handling 
please ?

--------------------------------------------------
From: "Matthias Bolte" <matthias.bolte at googlemail.com>
Sent: Thursday, March 18, 2010 11:39 AM
To: "Dev.Atom" <arnaud.champion at devatom.fr>
Cc: <libvir-list at redhat.com>
Subject: Re: [libvirt] Using callback under Windows compiling of libvirt 
library

> 2010/3/18 Dev.Atom <arnaud.champion at devatom.fr>:
>> Hi,
>>
>> I have compiled LibVirt 0.7.4 under mingw, and I want to use it with 
>> domain
>> callback. Here is a a code sample of my situation (I'm using visual 
>> studio)
>
> Did you compile it on Windows, or cross-compile it from Linux?
>
>>
>> static
>>
>> int domain_event(virConnectPtr conn,
>>
>> virDomainPtr dom,
>>
>> int evt,
>>
>> int detail,
>>
>> void *opaque)
>>
>> {
>>
>> bool test = true;
>>
>> return 0;
>>
>> }
>>
>> int
>>
>> _tmain(int argc, _TCHAR* argv[])
>>
>> {
>>
>> virConnectPtr conn = virConnectOpen(
>>
>> "qemu+tcp://192.168.220.198/session");
>>
>> // Set Callback
>>
>> int cbresult = virConnectDomainEventRegister(conn, domain_event, NULL,
>> NULL);
>>
>> // Lookup Domain
>>
>> virDomainPtr dom = virDomainLookupByName(conn,
>>
>> "Test1");
>>
>> if (virDomainIsActive(dom) == 1)
>>
>> {
>>
>> // Start Domain
>>
>> int startDom = virDomainCreate(dom);
>>
>> if (startDom != 0)
>>
>> {
>>
>> virErrorPtr e = virGetLastError();
>>
>> bool test = true;
>>
>> }
>>
>> }
>>
>> else
>>
>> {
>>
>> // Stop Domain
>>
>> int StopDom = virDomainDestroy(dom);
>>
>> if (StopDom != 0)
>>
>> {
>>
>> virErrorPtr e = virGetLastError();
>>
>> bool test = true;
>>
>> }
>>
>> }
>>
>> return 0;
>>
>> }
>
> This code is incomplete, you're missing the event-handling, see the
> virEventRegisterImpl function.
>
> Have you tried the domain-event example yet? See
> examples/domain-events/events-c/event-test.c in the libvirt codebase.
>
>>
>> This code works well when I did'nt use callbacks, but when I use it, it
>> throw an error at the virDomainCreate or virDomainDestroy call. In the
>> application windows (console) I have an "unmarshaling msg", I have study 
>> the
>> case it comme from the call of "xdr_string" method in the
>> "xdr_remote_nonull_string" method (remote_protocol.c).
>>
>> I think, the xdr_string method is unable to marshall strings from the 
>> XDR*
>> object to a char**.
>>
>
> Where did you get your XDR lib from? I'm using libportablexdr [1]
> version 4.9.1 on Windows, but had to patch it to get it compile
> correctly with MinGW.
>
> This may be a bug in your XDR lib, or may be a problem in the way
> libvirt uses XDR, or it's just a symptom of that fact that you try to
> use domain events without registering event-handling first.
>
> [1] http://people.redhat.com/~rjones/portablexdr/
>
> Matthias