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 --
9 -- Copyright (C) 1999-2004 Free Software Foundation, Inc. --
11 -- GNARL is free software; you can redistribute it and/or modify it under --
12 -- terms of the GNU General Public License as published by the Free Soft- --
13 -- ware Foundation; either version 2, or (at your option) any later ver- --
14 -- sion. GNARL is distributed in the hope that it will be useful, but WITH- --
15 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
16 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
17 -- for more details. You should have received a copy of the GNU General --
18 -- Public License distributed with GNARL; see file COPYING. If not, write --
19 -- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
20 -- MA 02111-1307, USA. --
22 -- As a special exception, if other files instantiate generics from this --
23 -- unit, or you link this unit with other files to produce an executable, --
24 -- this unit does not by itself cause the resulting executable to be --
25 -- covered by the GNU General Public License. This exception does not --
26 -- however invalidate any other reasons why the executable file might be --
27 -- covered by the GNU Public License. --
29 -- GNARL was developed by the GNARL team at Florida State University. --
30 -- Extensive contributions were provided by Ada Core Technologies, Inc. --
32 ------------------------------------------------------------------------------
34 -- This is a Darwin Threads version of this package
37 -- Turn off polling, we do not want ATC polling to take place during
38 -- tasking operations. It causes infinite loops and other problems.
42 package body System.OS_Interface is
50 function To_Duration (TS : timespec) return Duration is
52 return Duration (TS.tv_sec) + Duration (TS.tv_nsec) / 10#1#E9;
55 function To_Duration (TV : struct_timeval) return Duration is
57 return Duration (TV.tv_sec) + Duration (TV.tv_usec) / 10#1#E6;
64 function To_Timespec (D : Duration) return timespec is
69 S := time_t (Long_Long_Integer (D));
70 F := D - Duration (S);
72 -- If F has negative value due to a round-up, adjust for positive F
80 return timespec'(tv_sec => S,
81 tv_nsec => long (Long_Long_Integer (F * 10#1#E9)));
88 function To_Timeval (D : Duration) return struct_timeval is
93 S := long (Long_Long_Integer (D));
94 F := D - Duration (S);
96 -- If F has negative value due to a round-up, adjust for positive F
104 return struct_timeval'(tv_sec => S,
105 tv_usec => long (Long_Long_Integer (F * 10#1#E6)));
112 function clock_gettime
113 (clock_id : clockid_t;
114 tp : access timespec) return int
116 pragma Unreferenced (clock_id);
118 tv : aliased struct_timeval;
120 function gettimeofday
121 (tv : access struct_timeval;
122 tz : System.Address := System.Null_Address) return int;
123 pragma Import (C, gettimeofday, "gettimeofday");
126 Result := gettimeofday (tv'Unchecked_Access);
127 tp.all := To_Timespec (To_Duration (tv));
135 function sched_yield return int is
136 procedure sched_yield_base (arg : System.Address);
137 pragma Import (C, sched_yield_base, "pthread_yield_np");
140 sched_yield_base (System.Null_Address);
148 procedure pthread_init is
157 function Get_Stack_Base (thread : pthread_t) return Address is
158 pragma Unreferenced (thread);
160 return System.Null_Address;
163 end System.OS_Interface;