------------------------------------------------------------------------------ -- -- -- GNU ADA 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) 1999-2004 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, 59 Temple Place - Suite 330, Boston, -- -- MA 02111-1307, 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 a Darwin Threads version of this package 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; package body System.OS_Interface is use Interfaces.C; ----------------- -- 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 => int32_t (Long_Long_Integer (F * 10#1#E9))); end To_Timespec; ---------------- -- To_Timeval -- ---------------- function To_Timeval (D : Duration) return struct_timeval is S : int32_t; F : Duration; begin S := int32_t (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 => int32_t (Long_Long_Integer (F * 10#1#E6))); end To_Timeval; ------------------- -- clock_gettime -- ------------------- function clock_gettime (clock_id : clockid_t; tp : access timespec) return int is pragma Unreferenced (clock_id); Result : int; tv : aliased struct_timeval; function gettimeofday (tv : access struct_timeval; tz : System.Address := System.Null_Address) return int; pragma Import (C, gettimeofday, "gettimeofday"); begin Result := gettimeofday (tv'Unchecked_Access); tp.all := To_Timespec (To_Duration (tv)); return Result; end clock_gettime; ----------------- -- sched_yield -- ----------------- function sched_yield return int is procedure sched_yield_base (arg : System.Address); pragma Import (C, sched_yield_base, "pthread_yield_np"); begin sched_yield_base (System.Null_Address); return 0; end sched_yield; ------------------ -- pthread_init -- ------------------ procedure pthread_init is begin null; end pthread_init; ---------------- -- Stack_Base -- ---------------- function Get_Stack_Base (thread : pthread_t) return Address is pragma Unreferenced (thread); begin return System.Null_Address; end Get_Stack_Base; end System.OS_Interface;