From 426b96164487ef441f25e2befc05a5bcce7a0524 Mon Sep 17 00:00:00 2001
From: Eduardo Habkost <ehabkost@redhat.com>
Date: Sun, 11 Mar 2018 14:42:09 -0400
Subject: [PATCH] machine: DEFINE_MACHINE() macro

The macro will allow easy registration of a TYPE_MACHINE subclass, using
only the machine name and a MachineClass initialization function as
parameter.

Backports commit ed0b6de343448d1014b53bcf541041373322fa1c from qemu
---
 qemu/include/hw/boards.h | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/qemu/include/hw/boards.h b/qemu/include/hw/boards.h
index c0f1e9b1..4f3e0efc 100644
--- a/qemu/include/hw/boards.h
+++ b/qemu/include/hw/boards.h
@@ -129,6 +129,29 @@ struct MachineState {
     AccelState *accelerator;
 };
 
+#define DEFINE_MACHINE(namestr, machine_initfn) \
+    static void machine_initfn##_class_init(struct uc_struct *uc, ObjectClass *oc, void *data) \
+    { \
+        MachineClass *mc = MACHINE_CLASS(uc, oc); \
+        machine_initfn(mc); \
+    } \
+    static const TypeInfo machine_initfn##_typeinfo = { \
+        MACHINE_TYPE_NAME(namestr), \
+        TYPE_MACHINE, \
+        0, \
+        0, \
+        NULL, \
+        NULL, \
+        NULL, \
+        NULL, \
+        NULL, \
+        machine_initfn##_class_init, \
+    }; \
+    void machine_initfn##_register_types(struct uc_struct *uc) \
+    { \
+        type_register_static(uc, &machine_initfn##_typeinfo); \
+    }
+
 void machine_register_types(struct uc_struct *uc);
 
 #endif