libxl: make the libxl error type an IDL enum

This makes it easier to use in language bindings.

Signed-off-by: Rob Hoes <rob.hoes@citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>

tools/libxl/libxl.h

@@ -459,24 +459,6 @@ typedef struct libxl__ctx libxl_ctx;
 
 const libxl_version_info* libxl_get_version_info(libxl_ctx *ctx);
 
-enum {
-    ERROR_NONSPECIFIC = -1,
-    ERROR_VERSION = -2,
-    ERROR_FAIL = -3,
-    ERROR_NI = -4,
-    ERROR_NOMEM = -5,
-    ERROR_INVAL = -6,
-    ERROR_BADFAIL = -7,
-    ERROR_GUEST_TIMEDOUT = -8,
-    ERROR_TIMEDOUT = -9,
-    ERROR_NOPARAVIRT = -10,
-    ERROR_NOT_READY = -11,
-    ERROR_OSEVENT_REG_FAIL = -12,
-    ERROR_BUFFERFULL = -13,
-    ERROR_UNKNOWN_CHILD = -14,
-};
-
-
 /*
  * Some libxl operations can take a long time.  These functions take a
  * parameter to control their concurrency:

tools/libxl/libxl_types.idl

@@ -28,6 +28,23 @@ MemKB = UInt(64, init_val = "LIBXL_MEMKB_DEFAULT")
 # Constants / Enumerations
 #
 
+libxl_error = Enumeration("error", [
+    (-1, "NONSPECIFIC"),
+    (-2, "VERSION"),
+    (-3, "FAIL"),
+    (-4, "NI"),
+    (-5, "NOMEM"),
+    (-6, "INVAL"),
+    (-7, "BADFAIL"),
+    (-8, "GUEST_TIMEDOUT"),
+    (-9, "TIMEDOUT"),
+    (-10, "NOPARAVIRT"),
+    (-11, "NOT_READY"),
+    (-12, "OSEVENT_REG_FAIL"),
+    (-13, "BUFFERFULL"),
+    (-14, "UNKNOWN_CHILD"),
+    ], value_namespace = "")
+
 libxl_domain_type = Enumeration("domain_type", [
     (-1, "INVALID"),
     (1, "HVM"),