conf: Introduce virDomainVideoDefClear helper

Future patches rely on the ability to reset the contents of the
virDomainVideoDef structure rather than re-allocating it.

Signed-off-by: Erik Skultety <eskultet@redhat.com>
Reviewed-by: John Ferlan <jferlan@redhat.com>

src/conf/domain_conf.c

@@ -2538,7 +2538,8 @@ virDomainVideoDefNew(void)
 }
 
 
-void virDomainVideoDefFree(virDomainVideoDefPtr def)
+void
+virDomainVideoDefClear(virDomainVideoDefPtr def)
 {
     if (!def)
         return;
@@ -2548,6 +2549,17 @@ void virDomainVideoDefFree(virDomainVideoDefPtr def)
     VIR_FREE(def->accel);
     VIR_FREE(def->virtio);
     VIR_FREE(def->driver);
+
+    memset(def, 0, sizeof(*def));
+}
+
+
+void virDomainVideoDefFree(virDomainVideoDefPtr def)
+{
+    if (!def)
+        return;
+
+    virDomainVideoDefClear(def);
     VIR_FREE(def);
 }
 

src/conf/domain_conf.h

@@ -2884,6 +2884,7 @@ void virDomainNVRAMDefFree(virDomainNVRAMDefPtr def);
 void virDomainWatchdogDefFree(virDomainWatchdogDefPtr def);
 virDomainVideoDefPtr virDomainVideoDefNew(void);
 void virDomainVideoDefFree(virDomainVideoDefPtr def);
+void virDomainVideoDefClear(virDomainVideoDefPtr def);
 virDomainHostdevDefPtr virDomainHostdevDefNew(void);
 void virDomainHostdevDefClear(virDomainHostdevDefPtr def);
 void virDomainHostdevDefFree(virDomainHostdevDefPtr def);

src/libvirt_private.syms

@@ -558,6 +558,7 @@ virDomainTPMModelTypeToString;
 virDomainUSBDeviceDefForeach;
 virDomainVideoDefaultRAM;
 virDomainVideoDefaultType;
+virDomainVideoDefClear;
 virDomainVideoDefFree;
 virDomainVideoDefNew;
 virDomainVideoTypeFromString;