summaryrefslogtreecommitdiff
path: root/lang/gnat/files/5fosinte.adb
blob: 8d28fda719332cc0eb2160053add6a32053a5971 (plain) (blame)
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;