Mercurial > hg > CbC > CbC_gcc
comparison gcc/ada/libgnat/s-osprim__solaris.adb @ 111:04ced10e8804
gcc 7
| author | kono |
|---|---|
| date | Fri, 27 Oct 2017 22:46:09 +0900 |
| parents | |
| children | 84e7813d76e9 |
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| 68:561a7518be6b | 111:04ced10e8804 |
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| 1 ------------------------------------------------------------------------------ | |
| 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) 1998-2017, 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 -- Timed_Delay -- | |
| 75 ----------------- | |
| 76 | |
| 77 procedure Timed_Delay | |
| 78 (Time : Duration; | |
| 79 Mode : Integer) | |
| 80 is | |
| 81 Rel_Time : Duration; | |
| 82 Abs_Time : Duration; | |
| 83 Base_Time : constant Duration := Clock; | |
| 84 Check_Time : Duration := Base_Time; | |
| 85 timeval : aliased struct_timeval; | |
| 86 | |
| 87 begin | |
| 88 if Mode = Relative then | |
| 89 Rel_Time := Time; | |
| 90 Abs_Time := Time + Check_Time; | |
| 91 else | |
| 92 Rel_Time := Time - Check_Time; | |
| 93 Abs_Time := Time; | |
| 94 end if; | |
| 95 | |
| 96 if Rel_Time > 0.0 then | |
| 97 loop | |
| 98 timeval.tv_sec := Long_Integer (Rel_Time); | |
| 99 | |
| 100 if Duration (timeval.tv_sec) > Rel_Time then | |
| 101 timeval.tv_sec := timeval.tv_sec - 1; | |
| 102 end if; | |
| 103 | |
| 104 timeval.tv_usec := | |
| 105 Long_Integer ((Rel_Time - Duration (timeval.tv_sec)) * 10#1#E6); | |
| 106 | |
| 107 C_select (timeout => timeval'Unchecked_Access); | |
| 108 Check_Time := Clock; | |
| 109 | |
| 110 exit when Abs_Time <= Check_Time or else Check_Time < Base_Time; | |
| 111 | |
| 112 Rel_Time := Abs_Time - Check_Time; | |
| 113 end loop; | |
| 114 end if; | |
| 115 end Timed_Delay; | |
| 116 | |
| 117 ---------------- | |
| 118 -- Initialize -- | |
| 119 ---------------- | |
| 120 | |
| 121 procedure Initialize is | |
| 122 begin | |
| 123 null; | |
| 124 end Initialize; | |
| 125 | |
| 126 end System.OS_Primitives; |