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");
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));
...
libvirt_eventloop_thr_func() called, and locked on
virEventRunDefaultImpl(), can it be called in thread, and if no, how
should i use it correctly ?
sorry for asking again, but i really can't solve it myself.
thx in advance.
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
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. > > Michalthank 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.