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 --
10 -- Copyright (C) 1997-2001, Free Software Fundation, Inc. --
12 -- GNARL is free software; you can redistribute it and/or modify it under --
13 -- terms of the GNU General Public License as published by the Free Soft- --
14 -- ware Foundation; either version 2, or (at your option) any later ver- --
15 -- sion. GNARL is distributed in the hope that it will be useful, but WITH- --
16 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
17 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
18 -- for more details. You should have received a copy of the GNU General --
19 -- Public License distributed with GNARL; see file COPYING. If not, write --
20 -- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
21 -- MA 02111-1307, USA. --
23 -- As a special exception, if other files instantiate generics from this --
24 -- unit, or you link this unit with other files to produce an executable, --
25 -- this unit does not by itself cause the resulting executable to be --
26 -- covered by the GNU General Public License. This exception does not --
27 -- however invalidate any other reasons why the executable file might be --
28 -- covered by the GNU Public License. --
30 -- GNARL was developed by the GNARL team at Florida State University. It is --
31 -- now maintained by Ada Core Technologies, Inc. (http://www.gnat.com). --
33 ------------------------------------------------------------------------------
35 -- This is a AIX (Native) version of this package
38 -- Turn off polling, we do not want ATC polling to take place during
39 -- tasking operations. It causes infinite loops and other problems.
43 package body System.OS_Interface is
51 function To_Duration (TS : timespec) return Duration is
53 return Duration (TS.tv_sec) + Duration (TS.tv_nsec) / 10#1#E9;
56 function To_Duration (TV : struct_timeval) return Duration is
58 return Duration (TV.tv_sec) + Duration (TV.tv_usec) / 10#1#E6;
65 function To_Timespec (D : Duration) return timespec is
70 S := time_t (Long_Long_Integer (D));
71 F := D - Duration (S);
73 -- If F has negative value due to a round-up, adjust for positive F
81 return timespec' (tv_sec => S,
82 tv_nsec => long (Long_Long_Integer (F * 10#1#E9)));
89 function To_Timeval (D : Duration) return struct_timeval is
94 S := long (Long_Long_Integer (D));
95 F := D - Duration (S);
97 -- If F has negative value due to a round-up, adjust for positive F
105 return struct_timeval' (tv_sec => S,
106 tv_usec => long (Long_Long_Integer (F * 10#1#E6)));
113 function clock_gettime
114 (clock_id : clockid_t;
115 tp : access timespec)
119 tv : aliased struct_timeval;
121 function gettimeofday
122 (tv : access struct_timeval;
123 tz : System.Address := System.Null_Address) return int;
124 pragma Import (C, gettimeofday, "gettimeofday");
127 Result := gettimeofday (tv'Unchecked_Access);
128 tp.all := To_Timespec (To_Duration (tv));
136 -- AIX Thread does not have sched_yield;
138 function sched_yield return int is
140 procedure pthread_yield;
141 pragma Import (C, pthread_yield, "sched_yield");
148 function Get_Stack_Base (thread : pthread_t) return Address is
153 end System.OS_Interface;