1------------------------------------------------------------------------------ 2-- -- 3-- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS -- 4-- -- 5-- S Y S T E M . O S _ I N T E R F A C E -- 6-- -- 7-- B o d y -- 8-- -- 9-- Copyright (C) 2001-2010, AdaCore -- 10-- -- 11-- GNAT 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 is a LynxOS (POSIX Threads) version of this package 33 34pragma Polling (Off); 35-- Turn off polling, we do not want ATC polling to take place during 36-- tasking operations. It causes infinite loops and other problems. 37 38package body System.OS_Interface is 39 40 use Interfaces.C; 41 42 ----------------- 43 -- To_Duration -- 44 ----------------- 45 46 function To_Duration (TS : timespec) return Duration is 47 begin 48 return Duration (TS.tv_sec) + Duration (TS.tv_nsec) / 10#1#E9; 49 end To_Duration; 50 51 ----------------- 52 -- To_Timespec -- 53 ----------------- 54 55 function To_Timespec (D : Duration) return timespec is 56 S : time_t; 57 F : Duration; 58 59 begin 60 S := time_t (Long_Long_Integer (D)); 61 F := D - Duration (S); 62 63 -- If F has negative value due to a round-up, adjust for positive F 64 -- value. 65 66 if F < 0.0 then 67 S := S - 1; 68 F := F + 1.0; 69 end if; 70 71 return timespec'(tv_sec => S, 72 tv_nsec => long (Long_Long_Integer (F * 10#1#E9))); 73 end To_Timespec; 74 75 ------------- 76 -- sigwait -- 77 ------------- 78 79 function sigwait 80 (set : access sigset_t; 81 sig : access Signal) 82 return int 83 is 84 function sigwaitinfo 85 (set : access sigset_t; 86 info : System.Address) return Signal; 87 pragma Import (C, sigwaitinfo, "sigwaitinfo"); 88 89 begin 90 sig.all := sigwaitinfo (set, Null_Address); 91 92 if sig.all = -1 then 93 return errno; 94 end if; 95 96 return 0; 97 end sigwait; 98 99 -------------------- 100 -- Get_Stack_Base -- 101 -------------------- 102 103 function Get_Stack_Base (thread : pthread_t) return Address is 104 pragma Warnings (Off, thread); 105 106 begin 107 return Null_Address; 108 end Get_Stack_Base; 109 110 ------------------ 111 -- pthread_init -- 112 ------------------ 113 114 procedure pthread_init is 115 begin 116 null; 117 end pthread_init; 118 119end System.OS_Interface; 120