tools: ocaml: rename the topology types and functions

The aims are:
1. make the records instantiable if they have field names in common; and
2. to make it easier to derive the names programatically from the IDL

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Ian Jackson <ian.jackson.citrix.com>
Committed-by: Ian Jackson <ian.jackson.citrix.com>
Cc: David Scott <dave.scott@eu.citrix.com>

tools/ocaml/libs/xl/xl.ml

@@ -211,14 +211,15 @@ module Physinfo = struct
 
 end
 
-type topology = 
-{
-	core: int;
-	socket: int;
-	node: int;
-}
-
-type topologyinfo = topology option array
+module Topologyinfo = struct
+	type t =
+	{
+		core: int;
+		socket: int;
+		node: int;
+	}
+	external get: unit -> t = "stub_xl_topologyinfo"
+end
 
 module Sched_credit = struct
 	type t =
@@ -236,7 +237,6 @@ type button =
 
 external button_press : domid -> button -> unit = "stub_xl_button_press"
 
-external topologyinfo: unit -> topologyinfo = "stub_xl_topologyinfo"
 
 external send_trigger : domid -> string -> int -> unit = "stub_xl_send_trigger"
 external send_sysrq : domid -> char -> unit = "stub_xl_send_sysrq"

tools/ocaml/libs/xl/xl.mli

@@ -211,14 +211,15 @@ module Physinfo : sig
 
 end
 
-type topology = 
-{
-	core: int;
-	socket: int;
-	node: int;
-}
-
-type topologyinfo = topology option array
+module Topologyinfo : sig
+	type t =
+	{
+		core: int;
+		socket: int;
+		node: int;
+	}
+	external get : unit -> t = "stub_xl_topologyinfo"
+end
 
 module Sched_credit : sig
 	type t =
@@ -237,8 +238,6 @@ type button =
 
 external button_press : domid -> button -> unit = "stub_xl_button_press"
 
-external topologyinfo: unit -> topologyinfo = "stub_xl_topologyinfo"
-
 external send_trigger : domid -> string -> int -> unit = "stub_xl_send_trigger"
 external send_sysrq : domid -> char -> unit = "stub_xl_send_sysrq"
 external send_debug_keys : domid -> string -> unit = "stub_xl_send_debug_keys"