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) 1991-2007, 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. It is --
30 -- now maintained by Ada Core Technologies Inc. in cooperation with Florida --
31 -- State University (http://www.gnat.com). --
33 ------------------------------------------------------------------------------
35 -- This is the FreeBSD THREADS version of this package
37 with Interfaces.C; use Interfaces.C;
39 package body System.OS_Interface is
41 function Errno return int is
42 type int_ptr is access all int;
44 function internal_errno return int_ptr;
45 pragma Import (C, internal_errno, "__error");
47 return (internal_errno.all);
50 function Get_Stack_Base (thread : pthread_t) return Address is
51 pragma Unreferenced (thread);
56 procedure pthread_init is
65 function To_Duration (TS : timespec) return Duration is
67 return Duration (TS.ts_sec) + Duration (TS.ts_nsec) / 10#1#E9;
70 ------------------------
71 -- To_Target_Priority --
72 ------------------------
74 function To_Target_Priority
75 (Prio : System.Any_Priority) return Interfaces.C.int
78 return Interfaces.C.int (Prio);
79 end To_Target_Priority;
85 function To_Timespec (D : Duration) return timespec is
89 S := time_t (Long_Long_Integer (D));
90 F := D - Duration (S);
92 -- If F has negative value due to a round-up, adjust for positive F
94 if F < 0.0 then S := S - 1; F := F + 1.0; end if;
95 return timespec'(ts_sec => S,
96 ts_nsec => long (Long_Long_Integer (F * 10#1#E9)));
99 end System.OS_Interface;