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

Subversion Repositories openrisc

[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [gcc/] [ada/] [a-caldel.adb] - Blame information for rev 706

Details | Compare with Previous | View Log

Line No. Rev Author Line
1 706 jeremybenn
------------------------------------------------------------------------------
2
--                                                                          --
3
--                 GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS                 --
4
--                                                                          --
5
--                   A D A . C A L E N D A R . D E L A Y S                  --
6
--                                                                          --
7
--                                  B o d y                                 --
8
--                                                                          --
9
--             Copyright (C) 1991-1994, Florida State University            --
10
--                     Copyright (C) 1995-2010, AdaCore                     --
11
--                                                                          --
12
-- GNAT 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 3,  or (at your option) any later ver- --
15
-- sion.  GNAT 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.                                     --
18
--                                                                          --
19
-- As a special exception under Section 7 of GPL version 3, you are granted --
20
-- additional permissions described in the GCC Runtime Library Exception,   --
21
-- version 3.1, as published by the Free Software Foundation.               --
22
--                                                                          --
23
-- You should have received a copy of the GNU General Public License and    --
24
-- a copy of the GCC Runtime Library Exception along with this program;     --
25
-- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
26
-- <http://www.gnu.org/licenses/>.                                          --
27
--                                                                          --
28
-- GNARL was developed by the GNARL team at Florida State University.       --
29
-- Extensive contributions were provided by Ada Core Technologies, Inc.     --
30
--                                                                          --
31
------------------------------------------------------------------------------
32
 
33
with System.OS_Primitives;
34
with System.Soft_Links;
35
with System.Traces;
36
with System.Parameters;
37
 
38
package body Ada.Calendar.Delays is
39
 
40
   package OSP renames System.OS_Primitives;
41
   package SSL renames System.Soft_Links;
42
 
43
   use type SSL.Timed_Delay_Call;
44
 
45
   use System.Traces;
46
 
47
   --  Earlier, System.Time_Operations was used to implement the following
48
   --  operations. The idea was to avoid sucking in the tasking packages. This
49
   --  did not work. Logically, we can't have it both ways. There is no way to
50
   --  implement time delays that will have correct task semantics without
51
   --  reference to the tasking run-time system. To achieve this goal, we now
52
   --  use soft links.
53
 
54
   -----------------------
55
   -- Local Subprograms --
56
   -----------------------
57
 
58
   procedure Timed_Delay_NT (Time : Duration; Mode : Integer);
59
   --  Timed delay procedure used when no tasking is active
60
 
61
   ---------------
62
   -- Delay_For --
63
   ---------------
64
 
65
   procedure Delay_For (D : Duration) is
66
   begin
67
      if System.Parameters.Runtime_Traces then
68
         Send_Trace_Info (W_Delay, D);
69
      end if;
70
 
71
      SSL.Timed_Delay.all (Duration'Min (D, OSP.Max_Sensible_Delay),
72
                           OSP.Relative);
73
 
74
      if System.Parameters.Runtime_Traces then
75
         Send_Trace_Info (M_Delay, D);
76
      end if;
77
   end Delay_For;
78
 
79
   -----------------
80
   -- Delay_Until --
81
   -----------------
82
 
83
   procedure Delay_Until (T : Time) is
84
      D : constant Duration := To_Duration (T);
85
 
86
   begin
87
      if System.Parameters.Runtime_Traces then
88
         Send_Trace_Info (WU_Delay, D);
89
      end if;
90
 
91
      SSL.Timed_Delay.all (D, OSP.Absolute_Calendar);
92
 
93
      if System.Parameters.Runtime_Traces then
94
         Send_Trace_Info (M_Delay, D);
95
      end if;
96
   end Delay_Until;
97
 
98
   --------------------
99
   -- Timed_Delay_NT --
100
   --------------------
101
 
102
   procedure Timed_Delay_NT (Time : Duration; Mode : Integer) is
103
   begin
104
      OSP.Timed_Delay (Time, Mode);
105
   end Timed_Delay_NT;
106
 
107
   -----------------
108
   -- To_Duration --
109
   -----------------
110
 
111
   function To_Duration (T : Time) return Duration is
112
   begin
113
      --  Since time has multiple representations on different platforms, a
114
      --  target independent operation in Ada.Calendar is used to perform
115
      --  this conversion.
116
 
117
      return Delay_Operations.To_Duration (T);
118
   end To_Duration;
119
 
120
begin
121
   --  Set up the Timed_Delay soft link to the non tasking version if it has
122
   --  not been already set. If tasking is present, Timed_Delay has already set
123
   --  this soft link, or this will be overridden during the elaboration of
124
   --  System.Tasking.Initialization
125
 
126
   if SSL.Timed_Delay = null then
127
      SSL.Timed_Delay := Timed_Delay_NT'Access;
128
   end if;
129
 
130
end Ada.Calendar.Delays;

powered by: WebSVN 2.1.0

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