X-Git-Url: https://oss.titaniummirror.com/gitweb?a=blobdiff_plain;f=gcc%2Fada%2F5wosprim.adb;fp=gcc%2Fada%2F5wosprim.adb;h=0000000000000000000000000000000000000000;hb=6fed43773c9b0ce596dca5686f37ac3fc0fa11c0;hp=bfd265ee2bdf31f14e8ebe96f93aa5851768793e;hpb=27b11d56b743098deb193d510b337ba22dc52e5c;p=msp430-gcc.git diff --git a/gcc/ada/5wosprim.adb b/gcc/ada/5wosprim.adb deleted file mode 100644 index bfd265ee..00000000 --- a/gcc/ada/5wosprim.adb +++ /dev/null @@ -1,227 +0,0 @@ ------------------------------------------------------------------------------- --- -- --- GNU ADA RUN-TIME LIBRARY (GNARL) COMPONENTS -- --- -- --- S Y S T E M . O S _ P R I M I T I V E S -- --- -- --- B o d y -- --- -- --- $Revision: 1.1.16.2 $ --- -- --- Copyright (C) 1998-2001 Free Software Foundation, Inc. -- --- -- --- GNARL 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 2, or (at your option) any later ver- -- --- sion. GNARL 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. See the GNU General Public License -- --- for more details. You should have received a copy of the GNU General -- --- Public License distributed with GNARL; see file COPYING. If not, write -- --- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, -- --- MA 02111-1307, USA. -- --- -- --- As a special exception, if other files instantiate generics from this -- --- unit, or you link this unit with other files to produce an executable, -- --- this unit does not by itself cause the resulting executable to be -- --- covered by the GNU General Public License. This exception does not -- --- however invalidate any other reasons why the executable file might be -- --- covered by the GNU Public License. -- --- -- --- GNARL was developed by the GNARL team at Florida State University. -- --- Extensive contributions were provided by Ada Core Technologies Inc. -- --- -- ------------------------------------------------------------------------------- - --- This is the NT version of this package - -with Ada.Exceptions; -with System.OS_Interface; - -package body System.OS_Primitives is - - use System.OS_Interface; - - --------------------------------------- - -- Data for the high resolution clock -- - --------------------------------------- - - Tick_Frequency : aliased LARGE_INTEGER; - -- Holds frequency of high-performance counter used by Clock - -- Windows NT uses a 1_193_182 Hz counter on PCs. - - Base_Ticks : aliased LARGE_INTEGER; - -- Holds the Tick count for the base time. - - Base_Clock : Duration; - -- Holds the current clock for the standard clock's base time - - Base_Monotonic_Clock : Duration; - -- Holds the current clock for monotonic clock's base time - - Base_Time : aliased Long_Long_Integer; - -- Holds the base time used to check for system time change, used with - -- the standard clock. - - procedure Get_Base_Time; - -- Retrieve the base time. This base time will be used by clock to - -- compute the current time by adding to it a fraction of the - -- performance counter. This is for the implementation of a - -- high-resolution clock. - - ----------- - -- Clock -- - ----------- - - -- This implementation of clock provides high resolution timer values - -- using QueryPerformanceCounter. This call return a 64 bits values (based - -- on the 8253 16 bits counter). This counter is updated every 1/1_193_182 - -- times per seconds. The call to QueryPerformanceCounter takes 6 - -- microsecs to complete. - - function Clock return Duration is - Max_Shift : constant Duration := 2.0; - Hundreds_Nano_In_Sec : constant := 1E7; - Current_Ticks : aliased LARGE_INTEGER; - Elap_Secs_Tick : Duration; - Elap_Secs_Sys : Duration; - Now : aliased Long_Long_Integer; - - begin - if not QueryPerformanceCounter (Current_Ticks'Access) then - return 0.0; - end if; - - GetSystemTimeAsFileTime (Now'Access); - - Elap_Secs_Sys := - Duration (abs (Now - Base_Time) / Hundreds_Nano_In_Sec); - - Elap_Secs_Tick := - Duration (Long_Long_Float (Current_Ticks - Base_Ticks) / - Long_Long_Float (Tick_Frequency)); - - -- If we have a shift of more than Max_Shift seconds we resynchonize the - -- Clock. This is probably due to a manual Clock adjustment, an DST - -- adjustment or an NNTP synchronisation. And we want to adjust the - -- time for this system (non-monotonic) clock. - - if abs (Elap_Secs_Sys - Elap_Secs_Tick) > Max_Shift then - Get_Base_Time; - - Elap_Secs_Tick := - Duration (Long_Long_Float (Current_Ticks - Base_Ticks) / - Long_Long_Float (Tick_Frequency)); - end if; - - return Base_Clock + Elap_Secs_Tick; - end Clock; - - ------------------- - -- Get_Base_Time -- - ------------------- - - procedure Get_Base_Time is - use System.OS_Interface; - - -- The resolution for GetSystemTime is 1 millisecond. - - -- The time to get both base times should take less than 1 millisecond. - -- Therefore, the elapsed time reported by GetSystemTime between both - -- actions should be null. - - Max_Elapsed : constant := 0; - - Test_Now : aliased Long_Long_Integer; - - epoch_1970 : constant := 16#19D_B1DE_D53E_8000#; -- win32 UTC epoch - system_time_ns : constant := 100; -- 100 ns per tick - Sec_Unit : constant := 10#1#E9; - - begin - -- Here we must be sure that both of these calls are done in a short - -- amount of time. Both are base time and should in theory be taken - -- at the very same time. - - loop - GetSystemTimeAsFileTime (Base_Time'Access); - - if not QueryPerformanceCounter (Base_Ticks'Access) then - pragma Assert - (Standard.False, - "Could not query high performance counter in Clock"); - null; - end if; - - GetSystemTimeAsFileTime (Test_Now'Access); - - exit when Test_Now - Base_Time = Max_Elapsed; - end loop; - - Base_Clock := Duration - (Long_Long_Float ((Base_Time - epoch_1970) * system_time_ns) / - Long_Long_Float (Sec_Unit)); - end Get_Base_Time; - - --------------------- - -- Monotonic_Clock -- - --------------------- - - function Monotonic_Clock return Duration is - Current_Ticks : aliased LARGE_INTEGER; - Elap_Secs_Tick : Duration; - begin - if not QueryPerformanceCounter (Current_Ticks'Access) then - return 0.0; - end if; - - Elap_Secs_Tick := - Duration (Long_Long_Float (Current_Ticks - Base_Ticks) / - Long_Long_Float (Tick_Frequency)); - - return Base_Monotonic_Clock + Elap_Secs_Tick; - end Monotonic_Clock; - - ----------------- - -- Timed_Delay -- - ----------------- - - procedure Timed_Delay (Time : Duration; Mode : Integer) is - Rel_Time : Duration; - Abs_Time : Duration; - Check_Time : Duration := Monotonic_Clock; - - begin - if Mode = Relative then - Rel_Time := Time; - Abs_Time := Time + Check_Time; - else - Rel_Time := Time - Check_Time; - Abs_Time := Time; - end if; - - if Rel_Time > 0.0 then - loop - Sleep (DWORD (Rel_Time * 1000.0)); - Check_Time := Monotonic_Clock; - - exit when Abs_Time <= Check_Time; - - Rel_Time := Abs_Time - Check_Time; - end loop; - end if; - end Timed_Delay; - --- Package elaboration, get starting time as base - -begin - if not QueryPerformanceFrequency (Tick_Frequency'Access) then - Ada.Exceptions.Raise_Exception - (Program_Error'Identity, - "cannot get high performance counter frequency"); - end if; - - Get_Base_Time; - - Base_Monotonic_Clock := Base_Clock; -end System.OS_Primitives;