mix device operations handled via a vtable

1 files changed, 19 insertions, 0 deletions

diff --git a/mixlib/mix_vm.c b/mixlib/mix_vm.c
index 979d558..6da21e2 100644
--- a/mixlib/mix_vm.c
+++ b/mixlib/mix_vm.c
@@ -87,6 +87,8 @@ mix_vm_delete (mix_vm_t * vm)
 {
   int i;
   
+  g_return_if_fail (vm != NULL);
+  
   if (vm->line_table != NULL) g_tree_destroy (vm->line_table);
   if (vm->address_table != NULL) g_tree_destroy (vm->address_table);
   if (vm->symbol_table != NULL) mix_symbol_table_delete (vm->symbol_table);
@@ -97,6 +99,23 @@ mix_vm_delete (mix_vm_t * vm)
   g_free (vm);
 }
 
+/* connect devices to a virtual machine */
+mix_device_t *
+mix_vm_connect_device (mix_vm_t *vm, mix_device_t *device)
+{
+  mix_device_t *old;
+  mix_device_type_t type;
+  
+  g_return_val_if_fail (vm != NULL, NULL);
+  g_return_val_if_fail (device != NULL, NULL);
+  
+  type = mix_device_type (device);
+  old = vm->devices[type];
+  vm->devices[type] = device;
+  
+  return old;
+}
+
 /* Reset a vm  (set state as of a newly created one) */
 void
 mix_vm_reset (mix_vm_t * vm)