OpenCores
URL https://opencores.org/ocsvn/openrisc/openrisc/trunk

Subversion Repositories openrisc

[/] [openrisc/] [trunk/] [gnu-stable/] [gcc-4.5.1/] [gcc/] [ada/] [s-osprim-solaris.adb] - Blame information for rev 826

Details | Compare with Previous | View Log

Line No. Rev Author Line
1 281 jeremybenn
------------------------------------------------------------------------------
2
--                                                                          --
3
--                 GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS                 --
4
--                                                                          --
5
--                  S Y S T E M . O S _ P R I M I T I V E S                 --
6
--                                                                          --
7
--                                  B o d y                                 --
8
--                                                                          --
9
--          Copyright (C) 1998-2009, Free Software Foundation, Inc.         --
10
--                                                                          --
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 3,  or (at your option) any later ver- --
14
-- sion.  GNAT 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.                                     --
17
--                                                                          --
18
-- As a special exception under Section 7 of GPL version 3, you are granted --
19
-- additional permissions described in the GCC Runtime Library Exception,   --
20
-- version 3.1, as published by the Free Software Foundation.               --
21
--                                                                          --
22
-- You should have received a copy of the GNU General Public License and    --
23
-- a copy of the GCC Runtime Library Exception along with this program;     --
24
-- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
25
-- <http://www.gnu.org/licenses/>.                                          --
26
--                                                                          --
27
-- GNARL was developed by the GNARL team at Florida State University.       --
28
-- Extensive contributions were provided by Ada Core Technologies, Inc.     --
29
--                                                                          --
30
------------------------------------------------------------------------------
31
 
32
--  This version uses gettimeofday and select
33
--  This file is suitable for Solaris (32 and 64 bits).
34
 
35
package body System.OS_Primitives is
36
 
37
   --  ??? These definitions are duplicated from System.OS_Interface
38
   --  because we don't want to depend on any package. Consider removing
39
   --  these declarations in System.OS_Interface and move these ones in
40
   --  the spec.
41
 
42
   type struct_timeval is record
43
      tv_sec  : Long_Integer;
44
      tv_usec : Long_Integer;
45
   end record;
46
   pragma Convention (C, struct_timeval);
47
 
48
   procedure gettimeofday
49
     (tv : not null access struct_timeval;
50
      tz : Address := Null_Address);
51
   pragma Import (C, gettimeofday, "gettimeofday");
52
 
53
   procedure C_select
54
     (n         : Integer := 0;
55
      readfds,
56
      writefds,
57
      exceptfds : Address := Null_Address;
58
      timeout   : not null access struct_timeval);
59
   pragma Import (C, C_select, "select");
60
 
61
   -----------
62
   -- Clock --
63
   -----------
64
 
65
   function Clock return Duration is
66
      TV : aliased struct_timeval;
67
 
68
   begin
69
      gettimeofday (TV'Access);
70
      return Duration (TV.tv_sec) + Duration (TV.tv_usec) / 10#1#E6;
71
   end Clock;
72
 
73
   ---------------------
74
   -- Monotonic_Clock --
75
   ---------------------
76
 
77
   function Monotonic_Clock return Duration renames Clock;
78
 
79
   -----------------
80
   -- Timed_Delay --
81
   -----------------
82
 
83
   procedure Timed_Delay
84
     (Time : Duration;
85
      Mode : Integer)
86
   is
87
      Rel_Time   : Duration;
88
      Abs_Time   : Duration;
89
      Base_Time  : constant Duration := Clock;
90
      Check_Time : Duration := Base_Time;
91
      timeval    : aliased struct_timeval;
92
 
93
   begin
94
      if Mode = Relative then
95
         Rel_Time := Time;
96
         Abs_Time := Time + Check_Time;
97
      else
98
         Rel_Time := Time - Check_Time;
99
         Abs_Time := Time;
100
      end if;
101
 
102
      if Rel_Time > 0.0 then
103
         loop
104
            timeval.tv_sec := Long_Integer (Rel_Time);
105
 
106
            if Duration (timeval.tv_sec) > Rel_Time then
107
               timeval.tv_sec := timeval.tv_sec - 1;
108
            end if;
109
 
110
            timeval.tv_usec :=
111
              Long_Integer ((Rel_Time - Duration (timeval.tv_sec)) * 10#1#E6);
112
 
113
            C_select (timeout => timeval'Unchecked_Access);
114
            Check_Time := Clock;
115
 
116
            exit when Abs_Time <= Check_Time or else Check_Time < Base_Time;
117
 
118
            Rel_Time := Abs_Time - Check_Time;
119
         end loop;
120
      end if;
121
   end Timed_Delay;
122
 
123
   ----------------
124
   -- Initialize --
125
   ----------------
126
 
127
   procedure Initialize is
128
   begin
129
      null;
130
   end Initialize;
131
 
132
end System.OS_Primitives;

powered by: WebSVN 2.1.0

© copyright 1999-2024 OpenCores.org, equivalent to Oliscience, all rights reserved. OpenCores®, registered trademark.