1------------------------------------------------------------------------------ 2-- -- 3-- GNAT RUN-TIME COMPONENTS -- 4-- -- 5-- S Y S T E M -- 6-- -- 7-- S p e c -- 8-- (HP-UX Version) -- 9-- -- 10-- Copyright (C) 1992-2012, Free Software Foundation, Inc. -- 11-- -- 12-- This specification is derived from the Ada Reference Manual for use with -- 13-- GNAT. The copyright notice above, and the license provisions that follow -- 14-- apply solely to the contents of the part following the private keyword. -- 15-- -- 16-- GNAT is free software; you can redistribute it and/or modify it under -- 17-- terms of the GNU General Public License as published by the Free Soft- -- 18-- ware Foundation; either version 3, or (at your option) any later ver- -- 19-- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- 20-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- 21-- or FITNESS FOR A PARTICULAR PURPOSE. -- 22-- -- 23-- As a special exception under Section 7 of GPL version 3, you are granted -- 24-- additional permissions described in the GCC Runtime Library Exception, -- 25-- version 3.1, as published by the Free Software Foundation. -- 26-- -- 27-- You should have received a copy of the GNU General Public License and -- 28-- a copy of the GCC Runtime Library Exception along with this program; -- 29-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -- 30-- <http://www.gnu.org/licenses/>. -- 31-- -- 32-- GNAT was originally developed by the GNAT team at New York University. -- 33-- Extensive contributions were provided by Ada Core Technologies Inc. -- 34-- -- 35------------------------------------------------------------------------------ 36 37package System is 38 pragma Pure; 39 -- Note that we take advantage of the implementation permission to make 40 -- this unit Pure instead of Preelaborable; see RM 13.7.1(15). In Ada 41 -- 2005, this is Pure in any case (AI-362). 42 43 type Name is (SYSTEM_NAME_GNAT); 44 System_Name : constant Name := SYSTEM_NAME_GNAT; 45 46 -- System-Dependent Named Numbers 47 48 Min_Int : constant := Long_Long_Integer'First; 49 Max_Int : constant := Long_Long_Integer'Last; 50 51 Max_Binary_Modulus : constant := 2 ** Long_Long_Integer'Size; 52 Max_Nonbinary_Modulus : constant := 2 ** Integer'Size - 1; 53 54 Max_Base_Digits : constant := Long_Long_Float'Digits; 55 Max_Digits : constant := Long_Long_Float'Digits; 56 57 Max_Mantissa : constant := 63; 58 Fine_Delta : constant := 2.0 ** (-Max_Mantissa); 59 60 Tick : constant := 0.01; 61 62 -- Storage-related Declarations 63 64 type Address is private; 65 pragma Preelaborable_Initialization (Address); 66 Null_Address : constant Address; 67 68 Storage_Unit : constant := 8; 69 Word_Size : constant := 32; 70 Memory_Size : constant := 2 ** 32; 71 72 -- Address comparison 73 74 function "<" (Left, Right : Address) return Boolean; 75 function "<=" (Left, Right : Address) return Boolean; 76 function ">" (Left, Right : Address) return Boolean; 77 function ">=" (Left, Right : Address) return Boolean; 78 function "=" (Left, Right : Address) return Boolean; 79 80 pragma Import (Intrinsic, "<"); 81 pragma Import (Intrinsic, "<="); 82 pragma Import (Intrinsic, ">"); 83 pragma Import (Intrinsic, ">="); 84 pragma Import (Intrinsic, "="); 85 86 -- Other System-Dependent Declarations 87 88 type Bit_Order is (High_Order_First, Low_Order_First); 89 Default_Bit_Order : constant Bit_Order := High_Order_First; 90 pragma Warnings (Off, Default_Bit_Order); -- kill constant condition warning 91 92 -- Priority-related Declarations (RM D.1) 93 94 Max_Priority : constant Positive := 30; 95 Max_Interrupt_Priority : constant Positive := 31; 96 97 subtype Any_Priority is Integer range 0 .. 31; 98 subtype Priority is Any_Priority range 0 .. 30; 99 subtype Interrupt_Priority is Any_Priority range 31 .. 31; 100 101 Default_Priority : constant Priority := 15; 102 103private 104 105 type Address is mod Memory_Size; 106 Null_Address : constant Address := 0; 107 108 -------------------------------------- 109 -- System Implementation Parameters -- 110 -------------------------------------- 111 112 -- These parameters provide information about the target that is used 113 -- by the compiler. They are in the private part of System, where they 114 -- can be accessed using the special circuitry in the Targparm unit 115 -- whose source should be consulted for more detailed descriptions 116 -- of the individual switch values. 117 118 Backend_Divide_Checks : constant Boolean := False; 119 Backend_Overflow_Checks : constant Boolean := True; 120 Command_Line_Args : constant Boolean := True; 121 Configurable_Run_Time : constant Boolean := False; 122 Denorm : constant Boolean := True; 123 Duration_32_Bits : constant Boolean := False; 124 Exit_Status_Supported : constant Boolean := True; 125 Fractional_Fixed_Ops : constant Boolean := False; 126 Frontend_Layout : constant Boolean := False; 127 Machine_Overflows : constant Boolean := False; 128 Machine_Rounds : constant Boolean := True; 129 Preallocated_Stacks : constant Boolean := False; 130 Signed_Zeros : constant Boolean := True; 131 Stack_Check_Default : constant Boolean := False; 132 Stack_Check_Probes : constant Boolean := True; 133 Stack_Check_Limits : constant Boolean := False; 134 Support_Aggregates : constant Boolean := True; 135 Support_Composite_Assign : constant Boolean := True; 136 Support_Composite_Compare : constant Boolean := True; 137 Support_Long_Shifts : constant Boolean := True; 138 Always_Compatible_Rep : constant Boolean := True; 139 Suppress_Standard_Library : constant Boolean := False; 140 Use_Ada_Main_Program_Name : constant Boolean := False; 141 ZCX_By_Default : constant Boolean := True; 142 143 -------------------------- 144 -- Underlying Priorities -- 145 --------------------------- 146 147 -- Important note: this section of the file must come AFTER the 148 -- definition of the system implementation parameters to ensure 149 -- that the value of these parameters is available for analysis 150 -- of the declarations here (using Rtsfind at compile time). 151 152 -- The underlying priorities table provides a generalized mechanism 153 -- for mapping from Ada priorities to system priorities. In some 154 -- cases a 1-1 mapping is not the convenient or optimal choice. 155 156 -- For HP/UX DCE Threads, we use the full range of 31 priorities 157 -- in the Ada model, but map them by compression onto the more limited 158 -- range of priorities available in HP/UX. 159 -- For POSIX Threads, this table is ignored. 160 161 -- To replace the default values of the Underlying_Priorities mapping, 162 -- copy this source file into your build directory, edit the file to 163 -- reflect your desired behavior, and recompile with the command: 164 165 -- $ gcc -c -O2 -gnatpgn system.ads 166 167 -- then recompile the run-time parts that depend on this package: 168 169 -- $ gnatmake -a -gnatn -O2 <your application> 170 171 -- then force rebuilding your application if you need different options: 172 173 -- $ gnatmake -f <your options> <your application> 174 175 type Priorities_Mapping is array (Any_Priority) of Integer; 176 pragma Suppress_Initialization (Priorities_Mapping); 177 -- Suppress initialization in case gnat.adc specifies Normalize_Scalars 178 179 Underlying_Priorities : constant Priorities_Mapping := 180 181 (Priority'First => 16, 182 183 1 => 17, 184 2 => 18, 185 3 => 18, 186 4 => 18, 187 5 => 18, 188 6 => 19, 189 7 => 19, 190 8 => 19, 191 9 => 20, 192 10 => 20, 193 11 => 21, 194 12 => 21, 195 13 => 22, 196 14 => 23, 197 198 Default_Priority => 24, 199 200 16 => 25, 201 17 => 25, 202 18 => 25, 203 19 => 26, 204 20 => 26, 205 21 => 26, 206 22 => 27, 207 23 => 27, 208 24 => 27, 209 25 => 28, 210 26 => 28, 211 27 => 29, 212 28 => 29, 213 29 => 30, 214 215 Priority'Last => 30, 216 217 Interrupt_Priority => 31); 218 219end System; 220