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-common.h" 15 #include "qemu/event_notifier.h" 16 #include "qemu/main-loop.h" 17 18 int event_notifier_init(EventNotifier *e, int active) 19 { 20 e->event = CreateEvent(NULL, TRUE, FALSE, NULL); 21 assert(e->event); 22 return 0; 23 } 24 25 void event_notifier_cleanup(EventNotifier *e) 26 { 27 CloseHandle(e->event); 28 e->event = NULL; 29 } 30 31 HANDLE event_notifier_get_handle(EventNotifier *e) 32 { 33 return e->event; 34 } 35 36 int event_notifier_set(EventNotifier *e) 37 { 38 SetEvent(e->event); 39 return 0; 40 } 41 42 int event_notifier_test_and_clear(EventNotifier *e) 43 { 44 int ret = WaitForSingleObject(e->event, 0); 45 if (ret == WAIT_OBJECT_0) { 46 ResetEvent(e->event); 47 return true; 48 } 49 return false; 50 } 51