1 ------------------------------------------------------------------------------
3 -- GNAT 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) 1999-2006 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, 51 Franklin Street, Fifth Floor, --
20 -- Boston, MA 02110-1301, 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.
40 package body System.OS_Interface is
48 function To_Duration (TS : timespec) return Duration is
50 return Duration (TS.tv_sec) + Duration (TS.tv_nsec) / 10#1#E9;
53 function To_Duration (TV : struct_timeval) return Duration is
55 return Duration (TV.tv_sec) + Duration (TV.tv_usec) / 10#1#E6;
62 function To_Timespec (D : Duration) return timespec is
67 S := time_t (Long_Long_Integer (D));
68 F := D - Duration (S);
70 -- If F has negative value due to a round-up, adjust for positive F
78 return timespec'(tv_sec => S,
79 tv_nsec => int32_t (Long_Long_Integer (F * 10#1#E9)));
86 function To_Timeval (D : Duration) return struct_timeval is
92 F := D - Duration (S);
94 -- If F has negative value due to a round-up, adjust for positive F
102 return struct_timeval'
104 tv_usec => int32_t (Long_Long_Integer (F * 10#1#E6)));
111 function clock_gettime
112 (clock_id : clockid_t;
113 tp : access timespec) return int
115 pragma Unreferenced (clock_id);
117 tv : aliased struct_timeval;
119 function gettimeofday
120 (tv : access struct_timeval;
121 tz : System.Address := System.Null_Address) return int;
122 pragma Import (C, gettimeofday, "gettimeofday");
125 Result := gettimeofday (tv'Unchecked_Access);
126 tp.all := To_Timespec (To_Duration (tv));
134 function sched_yield return int is
135 procedure sched_yield_base (arg : System.Address);
136 pragma Import (C, sched_yield_base, "pthread_yield_np");
139 sched_yield_base (System.Null_Address);
147 procedure pthread_init is
156 function Get_Stack_Base (thread : pthread_t) return Address is
157 pragma Unreferenced (thread);
159 return System.Null_Address;
162 end System.OS_Interface;