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------------------------------------------------------------------------------
-- --
-- GNAT RUN-TIME COMPONENTS --
-- --
-- A D A . E X E C U T I O N _ T I M E --
-- --
-- S p e c --
-- --
-- This specification is derived from the Ada Reference Manual for use with --
-- GNAT. In accordance with the copyright of that document, you can freely --
-- copy and modify this specification, provided that if you redistribute a --
-- modified version, any changes that you have made are clearly indicated. --
-- --
------------------------------------------------------------------------------
-- This unit is not implemented in typical GNAT implementations that lie on
-- top of operating systems, because it is infeasible to implement in such
-- environments.
-- If a target environment provides appropriate support for this package
-- then the Unimplemented_Unit pragma should be removed from this spec and
-- an appropriate body provided.
with Ada.Task_Identification;
with Ada.Real_Time;
package Ada.Execution_Time with
SPARK_Mode
is
pragma Preelaborate;
pragma Unimplemented_Unit;
type CPU_Time is private;
CPU_Time_First : constant CPU_Time;
CPU_Time_Last : constant CPU_Time;
CPU_Time_Unit : constant := 0.000001;
CPU_Tick : constant Ada.Real_Time.Time_Span;
use type Ada.Task_Identification.Task_Id;
function Clock
(T : Ada.Task_Identification.Task_Id :=
Ada.Task_Identification.Current_Task)
return CPU_Time
with
Volatile_Function,
Global => Ada.Real_Time.Clock_Time,
Pre => T /= Ada.Task_Identification.Null_Task_Id;
function "+"
(Left : CPU_Time;
Right : Ada.Real_Time.Time_Span) return CPU_Time
with
Global => null;
function "+"
(Left : Ada.Real_Time.Time_Span;
Right : CPU_Time) return CPU_Time
with
Global => null;
function "-"
(Left : CPU_Time;
Right : Ada.Real_Time.Time_Span) return CPU_Time
with
Global => null;
function "-"
(Left : CPU_Time;
Right : CPU_Time) return Ada.Real_Time.Time_Span
with
Global => null;
function "<" (Left, Right : CPU_Time) return Boolean with
Global => null;
function "<=" (Left, Right : CPU_Time) return Boolean with
Global => null;
function ">" (Left, Right : CPU_Time) return Boolean with
Global => null;
function ">=" (Left, Right : CPU_Time) return Boolean with
Global => null;
procedure Split
(T : CPU_Time;
SC : out Ada.Real_Time.Seconds_Count;
TS : out Ada.Real_Time.Time_Span)
with
Global => null;
function Time_Of
(SC : Ada.Real_Time.Seconds_Count;
TS : Ada.Real_Time.Time_Span := Ada.Real_Time.Time_Span_Zero)
return CPU_Time
with
Global => null;
Interrupt_Clocks_Supported : constant Boolean := False;
Separate_Interrupt_Clocks_Supported : constant Boolean := False;
pragma Warnings (Off, "check will fail at run time");
function Clock_For_Interrupts return CPU_Time with
Volatile_Function,
Global => Ada.Real_Time.Clock_Time,
Pre => Interrupt_Clocks_Supported;
pragma Warnings (On, "check will fail at run time");
private
pragma SPARK_Mode (Off);
type CPU_Time is new Ada.Real_Time.Time;
CPU_Time_First : constant CPU_Time := CPU_Time (Ada.Real_Time.Time_First);
CPU_Time_Last : constant CPU_Time := CPU_Time (Ada.Real_Time.Time_Last);
CPU_Tick : constant Ada.Real_Time.Time_Span := Ada.Real_Time.Tick;
end Ada.Execution_Time;
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