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) 1998-2002, 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 the DEC Unix version of this package.
36 -- This package encapsulates all direct interfaces to OS services
37 -- that are needed by children of System.
40 -- Turn off polling, we do not want ATC polling to take place during
41 -- tasking operations. It causes infinite loops and other problems.
43 with Interfaces
.C
; use Interfaces
.C
;
44 with System
.Machine_Code
; use System
.Machine_Code
;
46 package body System
.OS_Interface
is
52 procedure pthread_init
is
61 function pthread_self
return pthread_t
is
64 Asm
("call_pal 0x9e" & ASCII
.LF
& ASCII
.HT
&
66 Outputs
=> pthread_t
'Asm_Output ("=r", Self
),
75 function To_Duration
(TS
: timespec
) return Duration is
77 return Duration (TS
.tv_sec
) + Duration (TS
.tv_nsec
) / 10#
1#E9
;
80 function To_Duration
(TV
: struct_timeval
) return Duration is
82 return Duration (TV
.tv_sec
) + Duration (TV
.tv_usec
) / 10#
1#E6
;
89 function To_Timespec
(D
: Duration) return timespec
is
94 S
:= time_t
(Long_Long_Integer (D
));
95 F
:= D
- Duration (S
);
97 -- If F has negative value due to a round-up, adjust for positive F
105 return timespec
'(tv_sec => S,
106 tv_nsec => long (Long_Long_Integer (F * 10#1#E9)));
113 function To_Timeval (D : Duration) return struct_timeval is
118 S := time_t (Long_Long_Integer (D));
119 F := D - Duration (S);
121 -- If F has negative value due to a round-up, adjust for positive F
132 tv_usec
=> time_t
(Long_Long_Integer (F
* 10#
1#E6
)));
135 end System
.OS_Interface
;