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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [gcc/] [ada/] [a-exetim-posix.adb] - Rev 718
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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) 2007-2011, 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 POSIX (Realtime Extension) version of this package with Ada.Task_Identification; use Ada.Task_Identification; with Ada.Unchecked_Conversion; with System.OS_Constants; use System.OS_Constants; with System.OS_Interface; use System.OS_Interface; with Interfaces.C; use Interfaces.C; package body Ada.Execution_Time is pragma Linker_Options ("-lrt"); -- POSIX.1b Realtime Extensions library. Needed to have access to function -- clock_gettime. --------- -- "+" -- --------- 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 TS : aliased timespec; Result : Interfaces.C.int; function To_CPU_Time is new Ada.Unchecked_Conversion (Duration, CPU_Time); -- Time is equal to Duration (although it is a private type) and -- CPU_Time is equal to Time. function clock_gettime (clock_id : Interfaces.C.int; tp : access timespec) return int; pragma Import (C, clock_gettime, "clock_gettime"); -- Function from the POSIX.1b Realtime Extensions library begin if T = Ada.Task_Identification.Null_Task_Id then raise Program_Error; end if; Result := clock_gettime (clock_id => CLOCK_THREAD_CPUTIME_ID, tp => TS'Unchecked_Access); pragma Assert (Result = 0); return To_CPU_Time (To_Duration (TS)); 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;
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