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[/] [openrisc/] [tags/] [gnu-src/] [gcc-4.5.1/] [gcc-4.5.1-or32-1.0rc3/] [gcc/] [ada/] [s-osinte-tru64.adb] - Rev 593
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------------------------------------------------------------------------------ -- -- -- 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) 1998-2009, 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 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 -- -- <http://www.gnu.org/licenses/>. -- -- -- -- 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", Volatile => True); return Self; end pthread_self; ---------------------- -- Hide_Yellow_Zone -- ---------------------- procedure Hide_Unhide_Yellow_Zone (Hide : Boolean) 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", Volatile => True); -- 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 => (if Hide then PROT_ON else PROT_OFF)); end if; end Hide_Unhide_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; ----------------- -- 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; end System.OS_Interface;
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