1 /* 2 * event notifier support 3 * 4 * Copyright Red Hat, Inc. 2010 5 * 6 * Authors: 7 * Michael S. Tsirkin <mst@redhat.com> 8 * 9 * This work is licensed under the terms of the GNU GPL, version 2 or later. 10 * See the COPYING file in the top-level directory. 11 */ 12 13 #include "qemu/osdep.h" 14 #include "qemu/event_notifier.h" 15 #include "qemu/main-loop.h" 16 17 int event_notifier_init(EventNotifier *e, int active) 18 { 19 e->event = CreateEvent(NULL, TRUE, FALSE, NULL); 20 assert(e->event); 21 return 0; 22 } 23 24 void event_notifier_cleanup(EventNotifier *e) 25 { 26 CloseHandle(e->event); 27 e->event = NULL; 28 } 29 30 HANDLE event_notifier_get_handle(EventNotifier *e) 31 { 32 return e->event; 33 } 34 35 int event_notifier_set(EventNotifier *e) 36 { 37 SetEvent(e->event); 38 return 0; 39 } 40 41 int event_notifier_test_and_clear(EventNotifier *e) 42 { 43 int ret = WaitForSingleObject(e->event, 0); 44 if (ret == WAIT_OBJECT_0) { 45 ResetEvent(e->event); 46 return true; 47 } 48 return false; 49 } 50