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qemu: add a cleanup callback function to EventNotifier 

Adding a cleanup callback function to the EventNotifier struct
which allows users to execute event_notifier_cleanup in a
different context.

Signed-off-by: Gal Hammer <ghammer@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Gal Hammer 2018-01-14 12:06:54 +02:00 committed by Michael S. Tsirkin
parent 406d2aa2cc
commit f87d72f5c5
3 changed files with 7 additions and 1 deletions
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1
include/qemu/event_notifier.h
View File

@ -26,6 +26,7 @@ struct EventNotifier {
int rfd; int rfd;
int wfd; int wfd;
#endif #endif
void (*cleanup)(EventNotifier *);
}; };
typedef void EventNotifierHandler(EventNotifier *); typedef void EventNotifierHandler(EventNotifier *);

5
util/event_notifier-posix.c
View File

@ -29,6 +29,7 @@ void event_notifier_init_fd(EventNotifier *e, int fd)
{ {
e->rfd = fd; e->rfd = fd;
e->wfd = fd; e->wfd = fd;
e->cleanup = NULL;
} }
#endif #endif
@ -65,6 +66,7 @@ int event_notifier_init(EventNotifier *e, int active)
e->rfd = fds[0]; e->rfd = fds[0];
e->wfd = fds[1]; e->wfd = fds[1];
} }
e->cleanup = NULL;
if (active) { if (active) {
event_notifier_set(e); event_notifier_set(e);
} }
@ -80,10 +82,11 @@ void event_notifier_cleanup(EventNotifier *e)
{ {
if (e->rfd != e->wfd) { if (e->rfd != e->wfd) {
close(e->rfd); close(e->rfd);
e->rfd = -1;
} }
close(e->wfd); close(e->wfd);
e->rfd = -1;
e->wfd = -1; e->wfd = -1;
e->cleanup = NULL;
} }
int event_notifier_get_fd(const EventNotifier *e) int event_notifier_get_fd(const EventNotifier *e)

2
util/event_notifier-win32.c
View File

@ -19,6 +19,7 @@ int event_notifier_init(EventNotifier *e, int active)
{ {
e->event = CreateEvent(NULL, TRUE, FALSE, NULL); e->event = CreateEvent(NULL, TRUE, FALSE, NULL);
assert(e->event); assert(e->event);
e->cleanup = NULL;
return 0; return 0;
} }
@ -26,6 +27,7 @@ void event_notifier_cleanup(EventNotifier *e)
{ {
CloseHandle(e->event); CloseHandle(e->event);
e->event = NULL; e->event = NULL;
e->cleanup = NULL;
} }
HANDLE event_notifier_get_handle(EventNotifier *e) HANDLE event_notifier_get_handle(EventNotifier *e)