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) 1991-1994, Florida State University --
10 -- Copyright (C) 1995-2005, AdaCore --
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, 51 Franklin Street, Fifth Floor, --
21 -- Boston, MA 02110-1301, 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. --
31 -- Extensive contributions were provided by Ada Core Technologies, Inc. --
33 ------------------------------------------------------------------------------
35 -- This is a Solaris version of this package.
37 -- This package encapsulates all direct interfaces to OS services
38 -- that are needed by children of System.
41 -- Turn off polling, we do not want ATC polling to take place during
42 -- tasking operations. It causes infinite loops and other problems.
44 with Interfaces.C; use Interfaces.C;
45 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;
60 function To_Timespec (D : Duration) return timespec is
64 S := time_t (Long_Long_Integer (D));
65 F := D - Duration (S);
67 -- If F has negative value due to a round-up, adjust for positive F
69 if F < 0.0 then S := S - 1; F := F + 1.0; end if;
70 return timespec'(tv_sec => S,
71 tv_nsec => long (Long_Long_Integer (F * 10#1#E9)));
74 function To_Duration (TV : struct_timeval) return Duration is
76 return Duration (TV.tv_sec) + Duration (TV.tv_usec) / 10#1#E6;
79 function To_Timeval (D : Duration) return struct_timeval is
83 S := long (Long_Long_Integer (D));
84 F := D - Duration (S);
86 -- If F has negative value due to a round-up, adjust for positive F
88 if F < 0.0 then S := S - 1; F := F + 1.0; end if;
92 tv_usec => long (Long_Long_Integer (F * 10#1#E6)));
95 procedure pthread_init is
100 end System.OS_Interface;