1------------------------------------------------------------------------------
2--                                                                          --
3--                         GNAT RUN-TIME COMPONENTS                         --
4--                                                                          --
5--                   A D A . E X E C U T I O N _ T I M E                    --
6--                                                                          --
7--                                 S p e c                                  --
8--                                                                          --
9--          Copyright (C) 2009-2019, Free Software Foundation, Inc.         --
10--                                                                          --
11-- This specification is derived from the Ada Reference Manual for use with --
12-- GNAT. The copyright notice above, and the license provisions that follow --
13-- apply solely to the  contents of the part following the private keyword. --
14--                                                                          --
15-- GNAT is free software;  you can  redistribute it  and/or modify it under --
16-- terms of the  GNU General Public License as published  by the Free Soft- --
17-- ware  Foundation;  either version 3,  or (at your option) any later ver- --
18-- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
19-- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
20-- or FITNESS FOR A PARTICULAR PURPOSE.                                     --
21--                                                                          --
22-- As a special exception under Section 7 of GPL version 3, you are granted --
23-- additional permissions described in the GCC Runtime Library Exception,   --
24-- version 3.1, as published by the Free Software Foundation.               --
25--                                                                          --
26-- You should have received a copy of the GNU General Public License and    --
27-- a copy of the GCC Runtime Library Exception along with this program;     --
28-- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
29-- <http://www.gnu.org/licenses/>.                                          --
30--                                                                          --
31-- GNAT was originally developed  by the GNAT team at  New York University. --
32-- Extensive contributions were provided by Ada Core Technologies Inc.      --
33--                                                                          --
34------------------------------------------------------------------------------
35
36--  This is the Windows native version of this package
37
38with Ada.Task_Identification;
39with Ada.Real_Time;
40
41package Ada.Execution_Time with
42  SPARK_Mode
43is
44   type CPU_Time is private;
45
46   CPU_Time_First : constant CPU_Time;
47   CPU_Time_Last  : constant CPU_Time;
48   CPU_Time_Unit  : constant := 0.000001;
49   CPU_Tick       : constant Ada.Real_Time.Time_Span;
50
51   use type Ada.Task_Identification.Task_Id;
52
53   function Clock
54     (T : Ada.Task_Identification.Task_Id :=
55        Ada.Task_Identification.Current_Task)
56      return CPU_Time
57   with
58     Volatile_Function,
59     Global => Ada.Real_Time.Clock_Time,
60     Pre    => T /= Ada.Task_Identification.Null_Task_Id;
61
62   function "+"
63     (Left  : CPU_Time;
64      Right : Ada.Real_Time.Time_Span) return CPU_Time
65   with
66     Global => null;
67
68   function "+"
69     (Left  : Ada.Real_Time.Time_Span;
70      Right : CPU_Time) return CPU_Time
71   with
72     Global => null;
73
74   function "-"
75     (Left  : CPU_Time;
76      Right : Ada.Real_Time.Time_Span) return CPU_Time
77   with
78     Global => null;
79
80   function "-"
81     (Left  : CPU_Time;
82      Right : CPU_Time) return Ada.Real_Time.Time_Span
83   with
84     Global => null;
85
86   function "<"  (Left, Right : CPU_Time) return Boolean with
87     Global => null;
88   function "<=" (Left, Right : CPU_Time) return Boolean with
89     Global => null;
90   function ">"  (Left, Right : CPU_Time) return Boolean with
91     Global => null;
92   function ">=" (Left, Right : CPU_Time) return Boolean with
93     Global => null;
94
95   procedure Split
96     (T  : CPU_Time;
97      SC : out Ada.Real_Time.Seconds_Count;
98      TS : out Ada.Real_Time.Time_Span)
99   with
100     Global => null;
101
102   function Time_Of
103     (SC : Ada.Real_Time.Seconds_Count;
104      TS : Ada.Real_Time.Time_Span := Ada.Real_Time.Time_Span_Zero)
105      return CPU_Time
106   with
107     Global => null;
108
109   Interrupt_Clocks_Supported          : constant Boolean := False;
110   Separate_Interrupt_Clocks_Supported : constant Boolean := False;
111
112   pragma Warnings (Off, "check will fail at run time");
113   function Clock_For_Interrupts return CPU_Time with
114     Volatile_Function,
115     Global => Ada.Real_Time.Clock_Time,
116     Pre    => Interrupt_Clocks_Supported;
117   pragma Warnings (On, "check will fail at run time");
118
119private
120   pragma SPARK_Mode (Off);
121
122   type CPU_Time is new Ada.Real_Time.Time;
123
124   CPU_Time_First : constant CPU_Time  := CPU_Time (Ada.Real_Time.Time_First);
125   CPU_Time_Last  : constant CPU_Time  := CPU_Time (Ada.Real_Time.Time_Last);
126
127   CPU_Tick : constant Ada.Real_Time.Time_Span := Ada.Real_Time.Tick;
128
129   pragma Import (Intrinsic, "<");
130   pragma Import (Intrinsic, "<=");
131   pragma Import (Intrinsic, ">");
132   pragma Import (Intrinsic, ">=");
133
134end Ada.Execution_Time;
135