Introduce Virtio-loopback epsilon release:

Epsilon release introduces a new compatibility layer which make virtio-loopback
design to work with QEMU and rust-vmm vhost-user backend without require any
changes.

Signed-off-by: Timos Ampelikiotis <t.ampelikiotis@virtualopensystems.com>
Change-Id: I52e57563e08a7d0bdc002f8e928ee61ba0c53dd9

1 files changed, 143 insertions, 0 deletions

diff --git a/qapi/qapi-dealloc-visitor.c b/qapi/qapi-dealloc-visitor.c
new file mode 100644
index 000000000..ef283f296
--- /dev/null
+++ b/qapi/qapi-dealloc-visitor.c
@@ -0,0 +1,143 @@
+/*
+ * Dealloc Visitor
+ *
+ * Copyright (C) 2012-2016 Red Hat, Inc.
+ * Copyright IBM, Corp. 2011
+ *
+ * Authors:
+ *  Michael Roth   <mdroth@linux.vnet.ibm.com>
+ *
+ * This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
+ * See the COPYING.LIB file in the top-level directory.
+ *
+ */
+
+#include "qemu/osdep.h"
+#include "qapi/dealloc-visitor.h"
+#include "qapi/qmp/qnull.h"
+#include "qapi/visitor-impl.h"
+
+struct QapiDeallocVisitor
+{
+    Visitor visitor;
+};
+
+static bool qapi_dealloc_start_struct(Visitor *v, const char *name, void **obj,
+                                      size_t unused, Error **errp)
+{
+    return true;
+}
+
+static void qapi_dealloc_end_struct(Visitor *v, void **obj)
+{
+    if (obj) {
+        g_free(*obj);
+    }
+}
+
+static void qapi_dealloc_end_alternate(Visitor *v, void **obj)
+{
+    if (obj) {
+        g_free(*obj);
+    }
+}
+
+static bool qapi_dealloc_start_list(Visitor *v, const char *name,
+                                    GenericList **list, size_t size,
+                                    Error **errp)
+{
+    return true;
+}
+
+static GenericList *qapi_dealloc_next_list(Visitor *v, GenericList *tail,
+                                           size_t size)
+{
+    GenericList *next = tail->next;
+    g_free(tail);
+    return next;
+}
+
+static void qapi_dealloc_end_list(Visitor *v, void **obj)
+{
+}
+
+static bool qapi_dealloc_type_str(Visitor *v, const char *name, char **obj,
+                                  Error **errp)
+{
+    if (obj) {
+        g_free(*obj);
+    }
+    return true;
+}
+
+static bool qapi_dealloc_type_int64(Visitor *v, const char *name, int64_t *obj,
+                                    Error **errp)
+{
+    return true;
+}
+
+static bool qapi_dealloc_type_uint64(Visitor *v, const char *name,
+                                     uint64_t *obj, Error **errp)
+{
+    return true;
+}
+
+static bool qapi_dealloc_type_bool(Visitor *v, const char *name, bool *obj,
+                                   Error **errp)
+{
+    return true;
+}
+
+static bool qapi_dealloc_type_number(Visitor *v, const char *name, double *obj,
+                                     Error **errp)
+{
+    return true;
+}
+
+static bool qapi_dealloc_type_anything(Visitor *v, const char *name,
+                                       QObject **obj, Error **errp)
+{
+    if (obj) {
+        qobject_unref(*obj);
+    }
+    return true;
+}
+
+static bool qapi_dealloc_type_null(Visitor *v, const char *name,
+                                   QNull **obj, Error **errp)
+{
+    if (obj) {
+        qobject_unref(*obj);
+    }
+    return true;
+}
+
+static void qapi_dealloc_free(Visitor *v)
+{
+    g_free(container_of(v, QapiDeallocVisitor, visitor));
+}
+
+Visitor *qapi_dealloc_visitor_new(void)
+{
+    QapiDeallocVisitor *v;
+
+    v = g_malloc0(sizeof(*v));
+
+    v->visitor.type = VISITOR_DEALLOC;
+    v->visitor.start_struct = qapi_dealloc_start_struct;
+    v->visitor.end_struct = qapi_dealloc_end_struct;
+    v->visitor.end_alternate = qapi_dealloc_end_alternate;
+    v->visitor.start_list = qapi_dealloc_start_list;
+    v->visitor.next_list = qapi_dealloc_next_list;
+    v->visitor.end_list = qapi_dealloc_end_list;
+    v->visitor.type_int64 = qapi_dealloc_type_int64;
+    v->visitor.type_uint64 = qapi_dealloc_type_uint64;
+    v->visitor.type_bool = qapi_dealloc_type_bool;
+    v->visitor.type_str = qapi_dealloc_type_str;
+    v->visitor.type_number = qapi_dealloc_type_number;
+    v->visitor.type_any = qapi_dealloc_type_anything;
+    v->visitor.type_null = qapi_dealloc_type_null;
+    v->visitor.free = qapi_dealloc_free;
+
+    return &v->visitor;
+}