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) 1991-2001 Florida State University --
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. in cooperation with Florida --
32 -- State University (http://www.gnat.com). --
34 ------------------------------------------------------------------------------
36 -- This is the DEC Unix and IRIX version of this package.
38 -- This package encapsulates all direct interfaces to OS services
39 -- that are needed by children of System.
42 -- Turn off polling, we do not want ATC polling to take place during
43 -- tasking operations. It causes infinite loops and other problems.
45 with Interfaces
.C
; use Interfaces
.C
;
46 package body System
.OS_Interface
is
52 procedure pthread_init
is
61 function To_Duration
(TS
: timespec
) return Duration is
63 return Duration (TS
.tv_sec
) + Duration (TS
.tv_nsec
) / 10#
1#E9
;
66 function To_Duration
(TV
: struct_timeval
) return Duration is
68 return Duration (TV
.tv_sec
) + Duration (TV
.tv_usec
) / 10#
1#E6
;
75 function To_Timespec
(D
: Duration) return timespec
is
80 S
:= time_t
(Long_Long_Integer (D
));
81 F
:= D
- Duration (S
);
83 -- If F has negative value due to a round-up, adjust for positive F
91 return timespec
' (tv_sec => S,
92 tv_nsec => long (Long_Long_Integer (F * 10#1#E9)));
95 function To_Timeval (D : Duration) return struct_timeval is
100 S := time_t (Long_Long_Integer (D));
101 F := D - Duration (S);
103 -- If F has negative value due to a round-up, adjust for positive F
111 return struct_timeval' (tv_sec
=> S
,
112 tv_usec
=> time_t
(Long_Long_Integer (F
* 10#
1#E6
)));
115 end System
.OS_Interface
;