| ------------------------------------------------------------------------------ |
| -- -- |
| -- GNAT RUN-TIME COMPONENTS -- |
| -- -- |
| -- S Y S T E M -- |
| -- -- |
| -- S p e c -- |
| -- (Darwin/PPC Version) -- |
| -- -- |
| -- Copyright (C) 1992-2005, 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 2, 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. See the GNU General Public License -- |
| -- for more details. You should have received a copy of the GNU General -- |
| -- Public License distributed with GNAT; see file COPYING. If not, write -- |
| -- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, -- |
| -- Boston, MA 02110-1301, 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. -- |
| -- -- |
| -- 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). |
| |
| type Name is (SYSTEM_NAME_GNAT); |
| System_Name : constant Name := SYSTEM_NAME_GNAT; |
| |
| -- System-Dependent Named Numbers |
| |
| Min_Int : constant := Long_Long_Integer'First; |
| Max_Int : constant := Long_Long_Integer'Last; |
| |
| Max_Binary_Modulus : constant := 2 ** Long_Long_Integer'Size; |
| Max_Nonbinary_Modulus : constant := Integer'Last; |
| |
| Max_Base_Digits : constant := Long_Long_Float'Digits; |
| Max_Digits : constant := Long_Long_Float'Digits; |
| |
| Max_Mantissa : constant := 63; |
| Fine_Delta : constant := 2.0 ** (-Max_Mantissa); |
| |
| Tick : constant := 0.01; |
| |
| -- Storage-related Declarations |
| |
| type Address is private; |
| 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; |
| |
| -- Priority-related Declarations (RM D.1) |
| |
| -- The values defined here are derived from the following Darwin |
| -- sources: |
| -- |
| -- Libc/pthreads/pthread.c |
| -- pthread_init calls host_info to retrieve the HOST_PRIORITY_INFO. |
| -- This file includes "pthread_internals". |
| -- Libc/pthreads/pthread_internals.h |
| -- This file includes <mach/mach.h>. |
| -- xnu/osfmk/mach/mach.h |
| -- This file includes <mach/mach_types.h>. |
| -- xnu/osfmk/mach/mach_types.h |
| -- This file includes <mach/host_info.h>. |
| -- xnu/osfmk/mach/host_info.h |
| -- This file contains the definition of the host_info_t data structure |
| -- and the function prototype for host_info. |
| -- xnu/osfmk/kern/host.c |
| -- This file defines the function host_info which sets the |
| -- priority_info field of struct host_info_t. This file includes |
| -- <kern/processor.h>. |
| -- xnu/osfmk/kern/processor.h |
| -- This file includes <kern/sched.h>. |
| -- xnu/osfmk/kern/sched.h |
| -- This file defines the values for each level of priority. |
| |
| Max_Interrupt_Priority : constant Positive := 63; |
| Max_Priority : constant Positive := Max_Interrupt_Priority - 1; |
| |
| subtype Any_Priority is Integer range 0 .. Max_Interrupt_Priority; |
| subtype Priority is Any_Priority range 0 .. Max_Priority; |
| subtype Interrupt_Priority is Any_Priority |
| range Priority'Last + 1 .. Max_Interrupt_Priority; |
| |
| Default_Priority : constant Priority := |
| (Priority'Last - Priority'First) / 2; |
| |
| private |
| |
| type Address is mod Memory_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. |
| |
| AAMP : constant Boolean := False; |
| Backend_Divide_Checks : constant Boolean := False; |
| Backend_Overflow_Checks : constant Boolean := False; |
| Command_Line_Args : constant Boolean := True; |
| Compiler_System_Version : constant Boolean := False; |
| Configurable_Run_Time : constant Boolean := False; |
| Denorm : constant Boolean := True; |
| Duration_32_Bits : constant Boolean := False; |
| Exit_Status_Supported : constant Boolean := True; |
| Fractional_Fixed_Ops : constant Boolean := False; |
| Frontend_Layout : constant Boolean := False; |
| Functions_Return_By_DSP : constant Boolean := False; |
| Machine_Overflows : constant Boolean := False; |
| Machine_Rounds : constant Boolean := True; |
| OpenVMS : constant Boolean := False; |
| Preallocated_Stacks : constant Boolean := False; |
| Signed_Zeros : constant Boolean := True; |
| Stack_Check_Default : constant Boolean := False; |
| Stack_Check_Probes : constant Boolean := False; |
| Support_64_Bit_Divides : constant Boolean := True; |
| Support_Aggregates : constant Boolean := True; |
| Support_Composite_Assign : constant Boolean := True; |
| Support_Composite_Compare : constant Boolean := True; |
| Support_Long_Shifts : constant Boolean := True; |
| Suppress_Standard_Library : constant Boolean := False; |
| Use_Ada_Main_Program_Name : constant Boolean := False; |
| ZCX_By_Default : constant Boolean := True; |
| GCC_ZCX_Support : constant Boolean := True; |
| Front_End_ZCX_Support : constant Boolean := False; |
| |
| -- Obsolete entries, to be removed eventually (bootstrap issues!) |
| |
| -- High_Integrity_Mode : constant Boolean := False; |
| -- Long_Shifts_Inlined : constant Boolean := True; |
| |
| end System; |
