1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
|
------------------------------------------------------------------------------
-- --
-- GNU ADA RUNTIME LIBRARY (GNARL) COMPONENTS --
-- --
-- S Y S T E M . O S _ I N T E R F A C E --
-- --
-- B o d y --
-- (Version for new GNARL) --
-- --
-- $Revision: 1.2 $ --
-- --
-- Copyright (C) 1991,1992,1993,1994,1995,1996 Florida State University --
-- --
-- GNARL is free software; you can redistribute it and/or modify it under --
-- terms of the GNU General Public License as published by the Free Soft- --
-- ware Foundation; either version 2, or (at your option) any later ver- --
-- sion. GNARL is distributed in the hope that it will be useful, but WITH- --
-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
-- for more details. You should have received a copy of the GNU General --
-- Public License distributed with GNARL; see file COPYING. If not, write --
-- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
-- MA 02111-1307, USA. --
-- --
-- As a special exception, if other files instantiate generics from this --
-- unit, or you link this unit with other files to produce an executable, --
-- this unit does not by itself cause the resulting executable to be --
-- covered by the GNU General Public License. This exception does not --
-- however invalidate any other reasons why the executable file might be --
-- covered by the GNU Public License. --
-- --
-- GNARL was developed by the GNARL team at Florida State University. It is --
-- now maintained by Ada Core Technologies Inc. in cooperation with Florida --
-- State University (http://www.gnat.com). --
-- --
------------------------------------------------------------------------------
-- This is the FreeBSD THREADS version of this package
-- This is only a first approximation.
-- It should be autogenerated by the m4 macro processor.
-- Contributed by Daniel M. Eischen (eischen@vigrid.com)
-- DO NOT EDIT this file.
-- It was automatically generated from another file by the m4 macro processor.
-- The name of the file you should edit is the same as this one, but with
-- ".ads" replaced by ".sm4", or
-- ".adb" replaced by ".bm4", or
-- ".c" replaced by ".cm4", or
-- ".dat" replaced by ".tm4"
-- Local options selected:
-- __TARGET = i386-unknown-freebsd
-- __ARCH = I386
-- __OS = FREEBSD
-- __HAS_SIGCONTEXT = 1
-- __HAS_UCONTEXT = 0
-- __THREADS = POSIX_THREADS
-- __THREAD_VARIANT = MIT-THREADS
-- __HAS_TIMESPEC = 1
-- __HAS_NANOSLEEP = 1
-- __HAS_CLOCK_GETTIME = 1
-- __HAS_GETTIMEOFDAY = 1
-- __POSIX_THREAD_PRIO_PROTECT = 0
-- __POSIX_THREAD_PRIO_INHERIT = 0
-- __POSIX_THREAD_ATTR_STACKADDR = 1
-- __POSIX_THREAD_ATTR_STACKSIZE = 1
-- __POSIX_THREAD_PRIORITY_SCHEDULING = 0
-- This package encapsulates all direct interfaces to OS services
-- that are needed by children of System.
-- This version is for POSIX-like operating systems
-- The original file "s-osinte.ads_m4" contains conditional
-- macro calls that allow selection of various options.
with Interfaces.C; use Interfaces.C;
package body System.OS_Interface is
function Errno return int is
type int_ptr is access all int;
function internal_errno return int_ptr;
pragma Import (C, internal_errno, "__error");
begin
return (internal_errno.all);
end Errno;
function Get_Stack_Base (thread : pthread_t) return Address is
begin
return (0);
end Get_Stack_Base;
procedure pthread_init is
begin
null;
end pthread_init;
-----------------
-- To_Duration --
-----------------
function To_Duration (TS : timespec) return Duration is
begin
return Duration (TS.ts_sec) + Duration (TS.ts_nsec) / 10#1#E9;
end To_Duration;
-----------------
-- To_Timespec --
-----------------
function To_Timespec (D : Duration) return timespec is
S : time_t;
F : Duration;
begin
S := time_t (Long_Long_Integer (D));
F := D - Duration (S);
-- If F has negative value due to a round-up, adjust for positive F
-- value.
if F < 0.0 then S := S - 1; F := F + 1.0; end if;
return timespec' (ts_sec => S,
ts_nsec => long (Long_Long_Integer (F * 10#1#E9)));
end To_Timespec;
function To_Duration (TV : struct_timeval) return Duration is
begin
return Duration (TV.tv_sec) + Duration (TV.tv_usec) / 10#1#E6;
end To_Duration;
function To_Timeval (D : Duration) return struct_timeval is
S : long;
F : Duration;
begin
S := long (Long_Long_Integer (D));
F := D - Duration (S);
-- If F has negative value due to a round-up, adjust for positive F
-- value.
if F < 0.0 then S := S - 1; F := F + 1.0; end if;
return struct_timeval' (tv_sec => S,
tv_usec => long (Long_Long_Integer (F * 10#1#E6)));
end To_Timeval;
end System.OS_Interface;
|
