------------------------------------------------------------------------------ -- -- -- 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;