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)

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 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**.

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(a)googlemail.com&gt; Sent: Thursday, March 18, 2010 11:39 AM To: "Dev.Atom" <arnaud.champion(a)devatom.fr&gt; Cc: <libvir-list(a)redhat.com&gt; Subject: Re: [libvirt] Using callback under Windows compiling of libvirt library > 2010/3/18 Dev.Atom <arnaud.champion(a)devatom.fr&gt;: >> 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 -- libvir-list mailing list libvir-list(a)redhat.com https://www.redhat.com/mailman/listinfo/libvir-list