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+------------------------------------------------------------------------------
+-- --
+-- GNAT RUN-TIME COMPONENTS --
+-- --
+-- A D A . E X E C U T I O N _ T I M E --
+-- --
+-- B o d y --
+-- --
+-- Copyright (C) 2007-2012, Free Software Foundation, Inc. --
+-- --
+-- GNAT is free software; you can redistribute it and/or modify it under --
+-- terms of the GNU General Public License as published by the Free Soft- --
+-- ware Foundation; either version 3, or (at your option) any later ver- --
+-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
+-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
+-- or FITNESS FOR A PARTICULAR PURPOSE. --
+-- --
+-- As a special exception under Section 7 of GPL version 3, you are granted --
+-- additional permissions described in the GCC Runtime Library Exception, --
+-- version 3.1, as published by the Free Software Foundation. --
+-- --
+-- You should have received a copy of the GNU General Public License and --
+-- a copy of the GCC Runtime Library Exception along with this program; --
+-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
+-- <http://www.gnu.org/licenses/>. --
+-- --
+-- GNAT was originally developed by the GNAT team at New York University. --
+-- Extensive contributions were provided by Ada Core Technologies Inc. --
+-- --
+------------------------------------------------------------------------------
+
+-- This is the Windows native version of this package
+
+with Ada.Task_Identification; use Ada.Task_Identification;
+with Ada.Unchecked_Conversion;
+
+with System.OS_Interface; use System.OS_Interface;
+with System.Task_Primitives.Operations; use System.Task_Primitives.Operations;
+with System.Tasking; use System.Tasking;
+with System.Win32; use System.Win32;
+
+package body Ada.Execution_Time is
+
+ ---------
+ -- "+" --
+ ---------
+
+ function "+"
+ (Left : CPU_Time;
+ Right : Ada.Real_Time.Time_Span) return CPU_Time
+ is
+ use type Ada.Real_Time.Time;
+ begin
+ return CPU_Time (Ada.Real_Time.Time (Left) + Right);
+ end "+";
+
+ function "+"
+ (Left : Ada.Real_Time.Time_Span;
+ Right : CPU_Time) return CPU_Time
+ is
+ use type Ada.Real_Time.Time;
+ begin
+ return CPU_Time (Left + Ada.Real_Time.Time (Right));
+ end "+";
+
+ ---------
+ -- "-" --
+ ---------
+
+ function "-"
+ (Left : CPU_Time;
+ Right : Ada.Real_Time.Time_Span) return CPU_Time
+ is
+ use type Ada.Real_Time.Time;
+ begin
+ return CPU_Time (Ada.Real_Time.Time (Left) - Right);
+ end "-";
+
+ function "-"
+ (Left : CPU_Time;
+ Right : CPU_Time) return Ada.Real_Time.Time_Span
+ is
+ use type Ada.Real_Time.Time;
+ begin
+ return (Ada.Real_Time.Time (Left) - Ada.Real_Time.Time (Right));
+ end "-";
+
+ -----------
+ -- Clock --
+ -----------
+
+ function Clock
+ (T : Ada.Task_Identification.Task_Id :=
+ Ada.Task_Identification.Current_Task) return CPU_Time
+ is
+ Hundreds_Nano_In_Sec : constant Long_Long_Float := 1.0E7;
+
+ function To_Time is new Ada.Unchecked_Conversion
+ (Duration, Ada.Real_Time.Time);
+
+ function To_Task_Id is new Ada.Unchecked_Conversion
+ (Ada.Task_Identification.Task_Id, System.Tasking.Task_Id);
+
+ C_Time : aliased Long_Long_Integer;
+ E_Time : aliased Long_Long_Integer;
+ K_Time : aliased Long_Long_Integer;
+ U_Time : aliased Long_Long_Integer;
+ Res : BOOL;
+
+ begin
+ if T = Ada.Task_Identification.Null_Task_Id then
+ raise Program_Error;
+ end if;
+
+ Res :=
+ GetThreadTimes
+ (HANDLE (Get_Thread_Id (To_Task_Id (T))),
+ C_Time'Access, E_Time'Access, K_Time'Access, U_Time'Access);
+
+ if Res = System.Win32.FALSE then
+ raise Program_Error;
+ end if;
+
+ return
+ CPU_Time
+ (To_Time
+ (Duration
+ ((Long_Long_Float (K_Time) / Hundreds_Nano_In_Sec)
+ + (Long_Long_Float (U_Time) / Hundreds_Nano_In_Sec))));
+ end Clock;
+
+ --------------------------
+ -- Clock_For_Interrupts --
+ --------------------------
+
+ function Clock_For_Interrupts return CPU_Time is
+ begin
+ -- According to AI 0170-1, D.14(18.1/3), if Interrupt_Clocks_Supported
+ -- is set to False the function raises Program_Error.
+
+ raise Program_Error;
+ return CPU_Time_First;
+ end Clock_For_Interrupts;
+
+ -----------
+ -- Split --
+ -----------
+
+ procedure Split
+ (T : CPU_Time;
+ SC : out Ada.Real_Time.Seconds_Count;
+ TS : out Ada.Real_Time.Time_Span)
+ is
+ use type Ada.Real_Time.Time;
+ begin
+ Ada.Real_Time.Split (Ada.Real_Time.Time (T), SC, TS);
+ end Split;
+
+ -------------
+ -- Time_Of --
+ -------------
+
+ function Time_Of
+ (SC : Ada.Real_Time.Seconds_Count;
+ TS : Ada.Real_Time.Time_Span := Ada.Real_Time.Time_Span_Zero)
+ return CPU_Time
+ is
+ begin
+ return CPU_Time (Ada.Real_Time.Time_Of (SC, TS));
+ end Time_Of;
+
+end Ada.Execution_Time;