1 /* 2 * Dealloc Visitor 3 * 4 * Copyright IBM, Corp. 2011 5 * 6 * Authors: 7 * Michael Roth <mdroth@linux.vnet.ibm.com> 8 * 9 * This work is licensed under the terms of the GNU LGPL, version 2.1 or later. 10 * See the COPYING.LIB file in the top-level directory. 11 * 12 */ 13 14 #include "qapi-dealloc-visitor.h" 15 #include "qemu-queue.h" 16 #include "qemu-common.h" 17 #include "qemu-objects.h" 18 19 typedef struct StackEntry 20 { 21 void *value; 22 QTAILQ_ENTRY(StackEntry) node; 23 } StackEntry; 24 25 struct QapiDeallocVisitor 26 { 27 Visitor visitor; 28 QTAILQ_HEAD(, StackEntry) stack; 29 }; 30 31 static QapiDeallocVisitor *to_qov(Visitor *v) 32 { 33 return container_of(v, QapiDeallocVisitor, visitor); 34 } 35 36 static void qapi_dealloc_push(QapiDeallocVisitor *qov, void *value) 37 { 38 StackEntry *e = g_malloc0(sizeof(*e)); 39 40 e->value = value; 41 QTAILQ_INSERT_HEAD(&qov->stack, e, node); 42 } 43 44 static void *qapi_dealloc_pop(QapiDeallocVisitor *qov) 45 { 46 StackEntry *e = QTAILQ_FIRST(&qov->stack); 47 QObject *value; 48 QTAILQ_REMOVE(&qov->stack, e, node); 49 value = e->value; 50 g_free(e); 51 return value; 52 } 53 54 static void qapi_dealloc_start_struct(Visitor *v, void **obj, const char *kind, 55 const char *name, size_t unused, 56 Error **errp) 57 { 58 QapiDeallocVisitor *qov = to_qov(v); 59 qapi_dealloc_push(qov, obj); 60 } 61 62 static void qapi_dealloc_end_struct(Visitor *v, Error **errp) 63 { 64 QapiDeallocVisitor *qov = to_qov(v); 65 void **obj = qapi_dealloc_pop(qov); 66 if (obj) { 67 g_free(*obj); 68 } 69 } 70 71 static void qapi_dealloc_start_list(Visitor *v, const char *name, Error **errp) 72 { 73 } 74 75 static GenericList *qapi_dealloc_next_list(Visitor *v, GenericList **list, 76 Error **errp) 77 { 78 GenericList *retval = *list; 79 g_free(retval->value); 80 *list = retval->next; 81 return retval; 82 } 83 84 static void qapi_dealloc_end_list(Visitor *v, Error **errp) 85 { 86 } 87 88 static void qapi_dealloc_type_str(Visitor *v, char **obj, const char *name, 89 Error **errp) 90 { 91 if (obj) { 92 g_free(*obj); 93 } 94 } 95 96 static void qapi_dealloc_type_int(Visitor *v, int64_t *obj, const char *name, 97 Error **errp) 98 { 99 } 100 101 static void qapi_dealloc_type_bool(Visitor *v, bool *obj, const char *name, 102 Error **errp) 103 { 104 } 105 106 static void qapi_dealloc_type_number(Visitor *v, double *obj, const char *name, 107 Error **errp) 108 { 109 } 110 111 static void qapi_dealloc_type_enum(Visitor *v, int *obj, const char *strings[], 112 const char *kind, const char *name, 113 Error **errp) 114 { 115 } 116 117 Visitor *qapi_dealloc_get_visitor(QapiDeallocVisitor *v) 118 { 119 return &v->visitor; 120 } 121 122 void qapi_dealloc_visitor_cleanup(QapiDeallocVisitor *v) 123 { 124 g_free(v); 125 } 126 127 QapiDeallocVisitor *qapi_dealloc_visitor_new(void) 128 { 129 QapiDeallocVisitor *v; 130 131 v = g_malloc0(sizeof(*v)); 132 133 v->visitor.start_struct = qapi_dealloc_start_struct; 134 v->visitor.end_struct = qapi_dealloc_end_struct; 135 v->visitor.start_list = qapi_dealloc_start_list; 136 v->visitor.next_list = qapi_dealloc_next_list; 137 v->visitor.end_list = qapi_dealloc_end_list; 138 v->visitor.type_enum = qapi_dealloc_type_enum; 139 v->visitor.type_int = qapi_dealloc_type_int; 140 v->visitor.type_bool = qapi_dealloc_type_bool; 141 v->visitor.type_str = qapi_dealloc_type_str; 142 v->visitor.type_number = qapi_dealloc_type_number; 143 144 QTAILQ_INIT(&v->stack); 145 146 return v; 147 } 148