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