@@ -17,6 +17,7 @@
type handle
external init: unit -> handle = "stub_eventchn_init"
+external fdopen: Unix.file_descr -> handle = "stub_eventchn_fdopen"
external fd: handle -> Unix.file_descr = "stub_eventchn_fd"
type t = int
@@ -47,6 +47,10 @@ val init: unit -> handle
(** Return an initialised event channel interface. On error it
will throw a Failure exception. *)
+val fdopen: Unix.file_descr -> handle
+(** Return an initialised event channel interface, from an already open evtchn
+ file descriptor. On error it will throw a Failure exception. *)
+
val fd: handle -> Unix.file_descr
(** Return a file descriptor suitable for Unix.select. When
the descriptor becomes readable, it is safe to call 'pending'.
@@ -69,6 +69,25 @@ CAMLprim value stub_eventchn_init(void)
CAMLreturn(result);
}
+CAMLprim value stub_eventchn_fdopen(value fdval)
+{
+ CAMLparam1(fdval);
+ CAMLlocal1(result);
+ xenevtchn_handle *xce;
+
+ caml_enter_blocking_section();
+ xce = xenevtchn_fdopen(NULL, Int_val(fdval), 0);
+ caml_leave_blocking_section();
+
+ if (xce == NULL)
+ caml_failwith("evtchn fdopen failed");
+
+ result = caml_alloc_custom(&xenevtchn_ops, sizeof(xce), 0, 1);
+ _H(result) = xce;
+
+ CAMLreturn(result);
+}
+
CAMLprim value stub_eventchn_fd(value xce)
{
CAMLparam1(xce);