introduce virSaveLastError(), virFreeError()

ChangeLog

+Mon Feb  9 14:07:51 GMT 2009 John Levon <john.levon@sun.com>
+
+	* include/libvirt/virterror.h:
+	* src/libvirt_public.syms:
+	* src/virterror.c: introduce virSaveLastError(), virFreeError()
+
 Mon Feb  9 10:21:33 GMT 2009 Daniel P. Berrange <berrange@redhat.com>
 
 	* src/virsh.c: Limit readonly history to 500 to avoid unbounded

include/libvirt/virterror.h

@@ -172,8 +172,10 @@ typedef void (*virErrorFunc) (void *userData, virErrorPtr error);
  */
 
 virErrorPtr		virGetLastError		(void);
+virErrorPtr		virSaveLastError	(void);
 void			virResetLastError	(void);
 void			virResetError		(virErrorPtr err);
+void			virFreeError		(virErrorPtr err);
 
 virErrorPtr		virConnGetLastError	(virConnectPtr conn);
 void			virConnResetLastError	(virConnectPtr conn);

src/libvirt_public.syms

@@ -247,4 +247,10 @@ LIBVIRT_0.6.0 {
 
 } LIBVIRT_0.5.0;
 
+LIBVIRT_0.6.1 {
+    global:
+	virFreeError;
+	virSaveLastError;
+} LIBVIRT_0.6.0;
+
 # .... define new API here using predicted next version number ....

src/virterror.c

@@ -285,6 +285,27 @@ virCopyLastError(virErrorPtr to)
     return to->code;
 }
 
+/**
+ * virSaveLastError:
+ *
+ * Save the last error into a new error object.
+ *
+ * Returns a pointer to the copied error or NULL if allocation failed.
+ * It is the caller's responsibility to free the error with
+ * virFreeError().
+ */
+virErrorPtr
+virSaveLastError(void)
+{
+    virErrorPtr to;
+
+    if (VIR_ALLOC(to) < 0)
+        return NULL;
+
+    virCopyLastError(to);
+    return to;
+}
+
 /**
  * virResetError:
  * @err: pointer to the virError to clean up
@@ -303,6 +324,18 @@ virResetError(virErrorPtr err)
     memset(err, 0, sizeof(virError));
 }
 
+/**
+ * virFreeError:
+ * @err: error to free
+ *
+ * Resets and frees the given error.
+ */
+void
+virFreeError(virErrorPtr err)
+{
+    virResetError(err);
+    VIR_FREE(err);
+}
 
 /**
  * virResetLastError: