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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;