1------------------------------------------------------------------------------ 2-- -- 3-- GNU ADA 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) 1998-2003 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 2, or (at your option) any later ver- -- 14-- sion. GNARL 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. See the GNU General Public License -- 17-- for more details. You should have received a copy of the GNU General -- 18-- Public License distributed with GNARL; see file COPYING. If not, write -- 19-- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, -- 20-- MA 02111-1307, USA. -- 21-- -- 22-- As a special exception, if other files instantiate generics from this -- 23-- unit, or you link this unit with other files to produce an executable, -- 24-- this unit does not by itself cause the resulting executable to be -- 25-- covered by the GNU General Public License. This exception does not -- 26-- however invalidate any other reasons why the executable file might be -- 27-- covered by the GNU Public License. -- 28-- -- 29-- GNARL was developed by the GNARL team at Florida State University. -- 30-- Extensive contributions were provided by Ada Core Technologies, Inc. -- 31-- -- 32------------------------------------------------------------------------------ 33 34-- This version uses gettimeofday and select 35-- This file is suitable for Solaris (32 and 64 bits). 36 37package body System.OS_Primitives is 38 39 -- ??? These definitions are duplicated from System.OS_Interface 40 -- because we don't want to depend on any package. Consider removing 41 -- these declarations in System.OS_Interface and move these ones in 42 -- the spec. 43 44 type struct_timeval is record 45 tv_sec : Long_Integer; 46 tv_usec : Long_Integer; 47 end record; 48 pragma Convention (C, struct_timeval); 49 50 procedure gettimeofday 51 (tv : access struct_timeval; 52 tz : Address := Null_Address); 53 pragma Import (C, gettimeofday, "gettimeofday"); 54 55 procedure C_select 56 (n : Integer := 0; 57 readfds, 58 writefds, 59 exceptfds : Address := Null_Address; 60 timeout : access struct_timeval); 61 pragma Import (C, C_select, "select"); 62 63 ----------- 64 -- Clock -- 65 ----------- 66 67 function Clock return Duration is 68 TV : aliased struct_timeval; 69 70 begin 71 gettimeofday (TV'Access); 72 return Duration (TV.tv_sec) + Duration (TV.tv_usec) / 10#1#E6; 73 end Clock; 74 75 --------------------- 76 -- Monotonic_Clock -- 77 --------------------- 78 79 function Monotonic_Clock return Duration renames Clock; 80 81 ----------------- 82 -- Timed_Delay -- 83 ----------------- 84 85 procedure Timed_Delay 86 (Time : Duration; 87 Mode : Integer) 88 is 89 Rel_Time : Duration; 90 Abs_Time : Duration; 91 Check_Time : Duration := Clock; 92 timeval : aliased struct_timeval; 93 94 begin 95 if Mode = Relative then 96 Rel_Time := Time; 97 Abs_Time := Time + Check_Time; 98 else 99 Rel_Time := Time - Check_Time; 100 Abs_Time := Time; 101 end if; 102 103 if Rel_Time > 0.0 then 104 loop 105 timeval.tv_sec := Long_Integer (Rel_Time); 106 107 if Duration (timeval.tv_sec) > Rel_Time then 108 timeval.tv_sec := timeval.tv_sec - 1; 109 end if; 110 111 timeval.tv_usec := 112 Long_Integer ((Rel_Time - Duration (timeval.tv_sec)) * 10#1#E6); 113 114 C_select (timeout => timeval'Unchecked_Access); 115 Check_Time := Clock; 116 117 exit when Abs_Time <= Check_Time; 118 119 Rel_Time := Abs_Time - Check_Time; 120 end loop; 121 end if; 122 end Timed_Delay; 123 124end System.OS_Primitives; 125