------------------------------------------------------------------------------ -- -- -- GNAT RUN-TIME COMPONENTS -- -- -- -- S Y S T E M -- -- -- -- S p e c -- -- (HP-UX Version) -- -- -- -- Copyright (C) 1992-2024, Free Software Foundation, Inc. -- -- -- -- This specification is derived from the Ada Reference Manual for use with -- -- GNAT. The copyright notice above, and the license provisions that follow -- -- apply solely to the contents of the part following the private keyword. -- -- -- -- 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 -- -- . -- -- -- -- GNAT was originally developed by the GNAT team at New York University. -- -- Extensive contributions were provided by Ada Core Technologies Inc. -- -- -- ------------------------------------------------------------------------------ package System is pragma Pure; -- Note that we take advantage of the implementation permission to make -- this unit Pure instead of Preelaborable; see RM 13.7.1(15). In Ada -- 2005, this is Pure in any case (AI-362). pragma No_Elaboration_Code_All; -- Allow the use of that restriction in units that WITH this unit type Name is (SYSTEM_NAME_GNAT); System_Name : constant Name := SYSTEM_NAME_GNAT; -- System-Dependent Named Numbers Min_Int : constant := -2 ** (Standard'Max_Integer_Size - 1); Max_Int : constant := 2 ** (Standard'Max_Integer_Size - 1) - 1; Max_Binary_Modulus : constant := 2 ** Standard'Max_Integer_Size; Max_Nonbinary_Modulus : constant := 2 ** Integer'Size - 1; Max_Base_Digits : constant := Long_Long_Float'Digits; Max_Digits : constant := Long_Long_Float'Digits; Max_Mantissa : constant := Standard'Max_Integer_Size - 1; Fine_Delta : constant := 2.0 ** (-Max_Mantissa); Tick : constant := 0.01; -- Storage-related Declarations type Address is private; pragma Preelaborable_Initialization (Address); Null_Address : constant Address; Storage_Unit : constant := 8; Word_Size : constant := 32; Memory_Size : constant := 2 ** 32; -- Address comparison function "<" (Left, Right : Address) return Boolean; function "<=" (Left, Right : Address) return Boolean; function ">" (Left, Right : Address) return Boolean; function ">=" (Left, Right : Address) return Boolean; function "=" (Left, Right : Address) return Boolean; pragma Import (Intrinsic, "<"); pragma Import (Intrinsic, "<="); pragma Import (Intrinsic, ">"); pragma Import (Intrinsic, ">="); pragma Import (Intrinsic, "="); -- Other System-Dependent Declarations type Bit_Order is (High_Order_First, Low_Order_First); Default_Bit_Order : constant Bit_Order := High_Order_First; pragma Warnings (Off, Default_Bit_Order); -- kill constant condition warning -- Priority-related Declarations (RM D.1) Max_Priority : constant Positive := 30; Max_Interrupt_Priority : constant Positive := 31; subtype Any_Priority is Integer range 0 .. 31; subtype Priority is Any_Priority range 0 .. 30; subtype Interrupt_Priority is Any_Priority range 31 .. 31; Default_Priority : constant Priority := 15; private type Address is mod Memory_Size; for Address'Size use Standard'Address_Size; Null_Address : constant Address := 0; -------------------------------------- -- System Implementation Parameters -- -------------------------------------- -- These parameters provide information about the target that is used -- by the compiler. They are in the private part of System, where they -- can be accessed using the special circuitry in the Targparm unit -- whose source should be consulted for more detailed descriptions -- of the individual switch values. Backend_Divide_Checks : constant Boolean := False; Backend_Overflow_Checks : constant Boolean := True; Command_Line_Args : constant Boolean := True; Configurable_Run_Time : constant Boolean := False; Denorm : constant Boolean := True; Duration_32_Bits : constant Boolean := False; Exit_Status_Supported : constant Boolean := True; Machine_Overflows : constant Boolean := False; Machine_Rounds : constant Boolean := True; Preallocated_Stacks : constant Boolean := False; Signed_Zeros : constant Boolean := True; Stack_Check_Default : constant Boolean := False; Stack_Check_Probes : constant Boolean := True; Stack_Check_Limits : constant Boolean := False; Support_Aggregates : constant Boolean := True; Support_Composite_Assign : constant Boolean := True; Support_Composite_Compare : constant Boolean := True; Support_Long_Shifts : constant Boolean := True; Always_Compatible_Rep : constant Boolean := False; Suppress_Standard_Library : constant Boolean := False; Use_Ada_Main_Program_Name : constant Boolean := False; ZCX_By_Default : constant Boolean := True; -------------------------- -- Underlying Priorities -- --------------------------- -- Important note: this section of the file must come AFTER the -- definition of the system implementation parameters to ensure -- that the value of these parameters is available for analysis -- of the declarations here (using Rtsfind at compile time). -- The underlying priorities table provides a generalized mechanism -- for mapping from Ada priorities to system priorities. In some -- cases a 1-1 mapping is not the convenient or optimal choice. -- For HP/UX DCE Threads, we use the full range of 31 priorities -- in the Ada model, but map them by compression onto the more limited -- range of priorities available in HP/UX. -- For POSIX Threads, this table is ignored. -- To replace the default values of the Underlying_Priorities mapping, -- copy this source file into your build directory, edit the file to -- reflect your desired behavior, and recompile with the command: -- $ gcc -c -O2 -gnatpgn system.ads -- then recompile the run-time parts that depend on this package: -- $ gnatmake -a -gnatn -O2 -- then force rebuilding your application if you need different options: -- $ gnatmake -f type Priorities_Mapping is array (Any_Priority) of Integer; pragma Suppress_Initialization (Priorities_Mapping); -- Suppress initialization in case gnat.adc specifies Normalize_Scalars Underlying_Priorities : constant Priorities_Mapping := (Priority'First => 16, 1 => 17, 2 => 18, 3 => 18, 4 => 18, 5 => 18, 6 => 19, 7 => 19, 8 => 19, 9 => 20, 10 => 20, 11 => 21, 12 => 21, 13 => 22, 14 => 23, Default_Priority => 24, 16 => 25, 17 => 25, 18 => 25, 19 => 26, 20 => 26, 21 => 26, 22 => 27, 23 => 27, 24 => 27, 25 => 28, 26 => 28, 27 => 29, 28 => 29, 29 => 30, Priority'Last => 30, Interrupt_Priority => 31); end System;