1 /* 2 * Reset handlers. 3 * 4 * Copyright (c) 2003-2008 Fabrice Bellard 5 * Copyright (c) 2016 Red Hat, Inc. 6 * 7 * Permission is hereby granted, free of charge, to any person obtaining a copy 8 * of this software and associated documentation files (the "Software"), to deal 9 * in the Software without restriction, including without limitation the rights 10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 11 * copies of the Software, and to permit persons to whom the Software is 12 * furnished to do so, subject to the following conditions: 13 * 14 * The above copyright notice and this permission notice shall be included in 15 * all copies or substantial portions of the Software. 16 * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 23 * THE SOFTWARE. 24 */ 25 26 #include "qemu/osdep.h" 27 #include "qemu/queue.h" 28 #include "sysemu/reset.h" 29 30 /* reset/shutdown handler */ 31 32 typedef struct QEMUResetEntry { 33 QTAILQ_ENTRY(QEMUResetEntry) entry; 34 QEMUResetHandler *func; 35 void *opaque; 36 } QEMUResetEntry; 37 38 static QTAILQ_HEAD(, QEMUResetEntry) reset_handlers = 39 QTAILQ_HEAD_INITIALIZER(reset_handlers); 40 41 void qemu_register_reset(QEMUResetHandler *func, void *opaque) 42 { 43 QEMUResetEntry *re = g_new0(QEMUResetEntry, 1); 44 45 re->func = func; 46 re->opaque = opaque; 47 QTAILQ_INSERT_TAIL(&reset_handlers, re, entry); 48 } 49 50 void qemu_unregister_reset(QEMUResetHandler *func, void *opaque) 51 { 52 QEMUResetEntry *re; 53 54 QTAILQ_FOREACH(re, &reset_handlers, entry) { 55 if (re->func == func && re->opaque == opaque) { 56 QTAILQ_REMOVE(&reset_handlers, re, entry); 57 g_free(re); 58 return; 59 } 60 } 61 } 62 63 void qemu_devices_reset(void) 64 { 65 QEMUResetEntry *re, *nre; 66 67 /* reset all devices */ 68 QTAILQ_FOREACH_SAFE(re, &reset_handlers, entry, nre) { 69 re->func(re->opaque); 70 } 71 } 72 73