unikernel/duniverse/mirage-ptime/solo5/dune

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+(library
+ (name mirage_ptime_solo5)
+ (public_name mirage-ptime.solo5)
+ (implements mirage-ptime)
+ (foreign_stubs
+  (language c)
+  (names mirage_ptime_stubs)))
+
+(rule
+ (target mirage_ptime_stubs.c)
+ (enabled_if
+  (<> %{context_name} "solo5"))
+ (deps
+  (:src mirage_ptime_stubs.default.c))
+ (action
+  (copy %{src} %{target})))
+
+(rule
+ (target mirage_ptime_stubs.c)
+ (enabled_if
+  (= %{context_name} "solo5"))
+ (deps
+  (:src mirage_ptime_stubs.solo5.c))
+ (action
+  (copy %{src} %{target})))

unikernel/duniverse/mirage-ptime/solo5/mirage_ptime.ml

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+(*
+ * Copyright (c) 2015 Matt Gray <matthew.thomas.gray@gmail.com>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *)
+
+external time : unit -> int64 = "caml_get_wall_clock"
+
+let nsec_per_day = Int64.mul 86_400L 1_000_000_000L
+let ps_per_ns = 1_000L
+
+let now_d_ps () =
+  let nsec = time () in
+  let days = Int64.div nsec nsec_per_day in
+  let rem_ns = Int64.rem nsec nsec_per_day in
+  let rem_ps = Int64.mul rem_ns ps_per_ns in
+  (Int64.to_int days, rem_ps)
+
+let now () = Ptime.v (now_d_ps ())
+let current_tz_offset_s () = None
+
+(* According to
+ * https://github.com/mirage/mini-os/blob/edfd5aae6ec5ba7d0a8834a3e9dfe5e69424150a/arch/x86/time.c#L194
+ * the clock period is 1 microsecond
+ *)
+let period = (0, 1_000_000L)
+let period_d_ps () = Some period
+let period () = Some (Ptime.Span.v period)

unikernel/duniverse/mirage-ptime/solo5/mirage_ptime_stubs.default.c

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+#include <caml/mlvalues.h>
+#include <caml/alloc.h>
+#include <caml/memory.h>
+#include <caml/fail.h>
+
+CAMLprim value
+caml_get_wall_clock(value v_unit)
+{
+  CAMLparam1(v_unit);
+  CAMLreturn(caml_copy_int64(0LL));
+}

unikernel/duniverse/mirage-ptime/solo5/mirage_ptime_stubs.solo5.c

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+/*
+ * Copyright (c) 2010 Anil Madhavapeddy <anil@recoil.org>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include "solo5.h"
+
+#include <sys/time.h>
+
+#include <caml/mlvalues.h>
+#include <caml/alloc.h>
+#include <caml/memory.h>
+#include <caml/fail.h>
+
+CAMLprim value
+caml_get_wall_clock(value v_unit)
+{
+  CAMLparam1(v_unit);
+  CAMLreturn(caml_copy_int64(solo5_clock_wall()));
+}