Initial upstream commit
The history contained unlicensed code so everything got squashed, sorry.
Change-Id: Ie1335ecfcee7f740bb6de2e9887606be30a2deff
Signed-off-by: Nico Huber <nico.huber@secunet.com>
diff --git a/common/hw-time.ads b/common/hw-time.ads
new file mode 100644
index 0000000..743279b
--- /dev/null
+++ b/common/hw-time.ads
@@ -0,0 +1,75 @@
+--
+-- Copyright (C) 2015-2016 secunet Security Networks AG
+--
+-- This program is free software; you can redistribute it and/or modify
+-- it under the terms of the GNU General Public License as published by
+-- the Free Software Foundation; version 2 of the License.
+--
+-- This program is distributed in the hope that it will be useful,
+-- but WITHOUT ANY WARRANTY; without even the implied warranty of
+-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+-- GNU General Public License for more details.
+--
+
+package HW.Time
+ with Abstract_State => (State with External => Async_Writers)
+is
+
+ type T is private;
+
+ function Now return T
+ with
+ Volatile_Function,
+ Global => (Input => State);
+
+ function US_From_Now (US : Natural) return T
+ with
+ Volatile_Function,
+ Global => (Input => State);
+
+ function MS_From_Now (MS : Natural) return T
+ with
+ Volatile_Function,
+ Global => (Input => State);
+
+ function Now_US return Int64
+ with
+ Volatile_Function,
+ Global => (Input => State);
+
+ ----------------------------------------------------------------------------
+
+ pragma Warnings
+ (GNATprove, Off, "subprogram ""*Delay*"" has no effect",
+ Reason => "No effect on dataflow but time always passes.");
+
+ -- Delay execution until Deadline has been reached.
+ procedure Delay_Until (Deadline : T)
+ with
+ Global => (Input => State);
+
+ procedure U_Delay (US : Natural)
+ with
+ Global => (Input => State);
+
+ procedure M_Delay (MS : Natural)
+ with
+ Global => (Input => State);
+
+ pragma Warnings
+ (GNATprove, On, "subprogram ""*Delay*"" has no effect");
+
+ ----------------------------------------------------------------------------
+
+ function Timed_Out (Deadline : T) return Boolean
+ with
+ Volatile_Function,
+ Global => (Input => State);
+
+private
+
+ type T is new Word64;
+
+end HW.Time;
+
+-- vim: set ts=8 sts=3 sw=3 et: