Re: [libvirt-users] event handler

Michal Privoznik писал 2013-10-14 08:48: > On 14.10.2013 02:42, Alexandr wrote: >> good day to all. >> i still have not solved my problem with event handling. >> currently i have following code >> >> >> void libvirt_eventloop_thr_func() >> { >> while(true) //TODO: stop somehow on exit >> { >> if(virEventRunDefaultImpl() < 0) >> { >> virErrorPtr err = virGetLastError(); >> fprintf(stderr, "Failed to run event loop: %s\n", err && >> err->message ? err->message : "Unknown error"); >> } >> } >> } >> >> >> >> ... >> >> virSetErrorFunc(NULL, libvirt_error_handler); >> libvirt_connection = virConnectOpen("qemu:///system"); > > Move this line ^^^ ... > >> if (virEventRegisterDefaultImpl() < 0) >> { >> virErrorPtr err = virGetLastError(); >> fprintf(stderr, "Failed to register event implementation: %s\n", >> err && err->message ? err->message: "Unknown error"); >> return -1; >> } >> { >> int callback = >> virConnectDomainEventRegisterAny(libvirt_connection, NULL, >> VIR_DOMAIN_EVENT_ID_LIFECYCLE, >> VIR_DOMAIN_EVENT_CALLBACK(domain_event_handler), NULL, NULL); >> if(callback == -1) >> { >> std::cout<<"Error: failed to register domain event handle >> callback\n"; >> return -1; >> } >> } >> >> boost::thread(boost::bind(&libvirt_eventloop_thr_func)); > > ... over here. The virConnectOpen detects if there's an even loop > registered. And in your case you don't have any registered when > calling it. > > Michal thank you very match, it now working as expected, but one thing are missed from documentations, current api docs says what i do not need to call virInitialize(), but if i call virEventRegisterDefaultImpl() without calling virInitialize() programm crashing (i have not used virInitialize() in my programm, just virConnectOpen() as docs said). problem solved now.

From virInitialize documentation [1]: