1 ------------------------------------------------------------------------------
3 -- GNU ADA RUN-TIME LIBRARY (GNARL) COMPONENTS --
5 -- S Y S T E M . O S _ I N T E R F A C E --
11 -- Copyright (C) 1997-2001, Free Software Fundation, Inc. --
13 -- GNARL is free software; you can redistribute it and/or modify it under --
14 -- terms of the GNU General Public License as published by the Free Soft- --
15 -- ware Foundation; either version 2, or (at your option) any later ver- --
16 -- sion. GNARL is distributed in the hope that it will be useful, but WITH- --
17 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
18 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
19 -- for more details. You should have received a copy of the GNU General --
20 -- Public License distributed with GNARL; see file COPYING. If not, write --
21 -- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
22 -- MA 02111-1307, USA. --
24 -- As a special exception, if other files instantiate generics from this --
25 -- unit, or you link this unit with other files to produce an executable, --
26 -- this unit does not by itself cause the resulting executable to be --
27 -- covered by the GNU General Public License. This exception does not --
28 -- however invalidate any other reasons why the executable file might be --
29 -- covered by the GNU Public License. --
31 -- GNARL was developed by the GNARL team at Florida State University. It is --
32 -- now maintained by Ada Core Technologies, Inc. (http://www.gnat.com). --
34 ------------------------------------------------------------------------------
36 -- This is a AIX (Native) version of this package
39 -- Turn off polling, we do not want ATC polling to take place during
40 -- tasking operations. It causes infinite loops and other problems.
44 package body System.OS_Interface is
52 function To_Duration (TS : timespec) return Duration is
54 return Duration (TS.tv_sec) + Duration (TS.tv_nsec) / 10#1#E9;
57 function To_Duration (TV : struct_timeval) return Duration is
59 return Duration (TV.tv_sec) + Duration (TV.tv_usec) / 10#1#E6;
66 function To_Timespec (D : Duration) return timespec is
71 S := time_t (Long_Long_Integer (D));
72 F := D - Duration (S);
74 -- If F has negative value due to a round-up, adjust for positive F
82 return timespec' (tv_sec => S,
83 tv_nsec => long (Long_Long_Integer (F * 10#1#E9)));
90 function To_Timeval (D : Duration) return struct_timeval is
95 S := long (Long_Long_Integer (D));
96 F := D - Duration (S);
98 -- If F has negative value due to a round-up, adjust for positive F
106 return struct_timeval' (tv_sec => S,
107 tv_usec => long (Long_Long_Integer (F * 10#1#E6)));
114 function clock_gettime
115 (clock_id : clockid_t;
116 tp : access timespec)
120 tv : aliased struct_timeval;
122 function gettimeofday
123 (tv : access struct_timeval;
124 tz : System.Address := System.Null_Address) return int;
125 pragma Import (C, gettimeofday, "gettimeofday");
128 Result := gettimeofday (tv'Unchecked_Access);
129 tp.all := To_Timespec (To_Duration (tv));
137 -- AIX Thread does not have sched_yield;
139 function sched_yield return int is
141 procedure pthread_yield;
142 pragma Import (C, pthread_yield, "sched_yield");
149 function Get_Stack_Base (thread : pthread_t) return Address is
154 end System.OS_Interface;