| ------------------------------------------------------------------------------ |
| -- -- |
| -- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS -- |
| -- -- |
| -- S Y S T E M . O S _ I N T E R F A C E -- |
| -- -- |
| -- B o d y -- |
| -- -- |
| -- Copyright (C) 1998-2005, 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, 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. -- |
| -- -- |
| -- GNARL was developed by the GNARL team at Florida State University. -- |
| -- Extensive contributions were provided by Ada Core Technologies, Inc. -- |
| -- -- |
| ------------------------------------------------------------------------------ |
| |
| -- This is the DEC Unix version of this package |
| |
| -- This package encapsulates all direct interfaces to OS services |
| -- that are needed by children of System. |
| |
| pragma Polling (Off); |
| -- Turn off polling, we do not want ATC polling to take place during |
| -- tasking operations. It causes infinite loops and other problems. |
| |
| with Interfaces.C; use Interfaces.C; |
| with System.Machine_Code; use System.Machine_Code; |
| |
| package body System.OS_Interface is |
| |
| -------------------- |
| -- Get_Stack_Base -- |
| -------------------- |
| |
| function Get_Stack_Base (thread : pthread_t) return Address is |
| pragma Unreferenced (thread); |
| begin |
| return Null_Address; |
| end Get_Stack_Base; |
| |
| ------------------ |
| -- pthread_init -- |
| ------------------ |
| |
| procedure pthread_init is |
| begin |
| null; |
| end pthread_init; |
| |
| ------------------ |
| -- pthread_self -- |
| ------------------ |
| |
| function pthread_self return pthread_t is |
| Self : pthread_t; |
| begin |
| Asm ("call_pal 0x9e" & ASCII.LF & ASCII.HT & |
| "bis $31, $0, %0", |
| Outputs => pthread_t'Asm_Output ("=r", Self), |
| Clobber => "$0"); |
| return Self; |
| end pthread_self; |
| |
| ---------------------- |
| -- Hide_Yellow_Zone -- |
| ---------------------- |
| |
| procedure Hide_Yellow_Zone is |
| type Teb_Ptr is access all pthread_teb_t; |
| Teb : Teb_Ptr; |
| Res : Interfaces.C.int; |
| pragma Unreferenced (Res); |
| |
| begin |
| -- Get the Thread Environment Block address |
| |
| Asm ("call_pal 0x9e" & ASCII.LF & ASCII.HT & |
| "bis $31, $0, %0", |
| Outputs => Teb_Ptr'Asm_Output ("=r", Teb), |
| Clobber => "$0"); |
| |
| -- Stick a guard page right above the Yellow Zone if it exists |
| |
| if Teb.all.stack_yellow /= Teb.all.stack_guard then |
| Res := mprotect (Teb.all.stack_yellow, Get_Page_Size, PROT_ON); |
| end if; |
| end Hide_Yellow_Zone; |
| |
| ----------------- |
| -- To_Duration -- |
| ----------------- |
| |
| function To_Duration (TS : timespec) return Duration is |
| begin |
| return Duration (TS.tv_sec) + Duration (TS.tv_nsec) / 10#1#E9; |
| end To_Duration; |
| |
| function To_Duration (TV : struct_timeval) return Duration is |
| begin |
| return Duration (TV.tv_sec) + Duration (TV.tv_usec) / 10#1#E6; |
| end To_Duration; |
| |
| ----------------- |
| -- To_Timespec -- |
| ----------------- |
| |
| function To_Timespec (D : Duration) return timespec is |
| S : time_t; |
| F : Duration; |
| |
| begin |
| S := time_t (Long_Long_Integer (D)); |
| F := D - Duration (S); |
| |
| -- If F has negative value due to a round-up, adjust for positive F |
| -- value. |
| |
| if F < 0.0 then |
| S := S - 1; |
| F := F + 1.0; |
| end if; |
| |
| return timespec'(tv_sec => S, |
| tv_nsec => long (Long_Long_Integer (F * 10#1#E9))); |
| end To_Timespec; |
| |
| ---------------- |
| -- To_Timeval -- |
| ---------------- |
| |
| function To_Timeval (D : Duration) return struct_timeval is |
| S : time_t; |
| F : Duration; |
| |
| begin |
| S := time_t (Long_Long_Integer (D)); |
| F := D - Duration (S); |
| |
| -- If F has negative value due to a round-up, adjust for positive F |
| -- value. |
| |
| if F < 0.0 then |
| S := S - 1; |
| F := F + 1.0; |
| end if; |
| |
| return |
| struct_timeval' |
| (tv_sec => S, |
| tv_usec => time_t (Long_Long_Integer (F * 10#1#E6))); |
| end To_Timeval; |
| |
| end System.OS_Interface; |
