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) 1991-2017, Florida State University -- 10-- Copyright (C) 1995-2019, 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-- This version is for QNX operating systems 34 35pragma Polling (Off); 36-- Turn off polling, we do not want ATC polling to take place during 37-- tasking operations. It causes infinite loops and other problems. 38 39-- This package encapsulates all direct interfaces to OS services 40-- that are needed by children of System. 41 42with Interfaces.C; use Interfaces.C; 43package body System.OS_Interface is 44 45 ----------------- 46 -- sigaltstack -- 47 ----------------- 48 49 function sigaltstack 50 (ss : not null access stack_t; 51 oss : access stack_t) return int 52 is 53 pragma Unreferenced (ss, oss); 54 begin 55 return 0; 56 end sigaltstack; 57 58 -------------------- 59 -- Get_Stack_Base -- 60 -------------------- 61 62 function Get_Stack_Base (thread : pthread_t) return Address is 63 pragma Unreferenced (thread); 64 begin 65 return Null_Address; 66 end Get_Stack_Base; 67 68 ------------------ 69 -- pthread_init -- 70 ------------------ 71 72 procedure pthread_init is 73 begin 74 null; 75 end pthread_init; 76 77 ----------------- 78 -- To_Duration -- 79 ----------------- 80 81 function To_Duration (TS : timespec) return Duration is 82 begin 83 return Duration (TS.tv_sec) + Duration (TS.tv_nsec) / 10#1#E9; 84 end To_Duration; 85 86 ------------------------ 87 -- To_Target_Priority -- 88 ------------------------ 89 90 function To_Target_Priority 91 (Prio : System.Any_Priority) return Interfaces.C.int 92 is 93 begin 94 return Interfaces.C.int (Prio + 1); 95 end To_Target_Priority; 96 97 ----------------- 98 -- To_Timespec -- 99 ----------------- 100 101 function To_Timespec (D : Duration) return timespec is 102 S : time_t; 103 F : Duration; 104 105 begin 106 S := time_t (Long_Long_Integer (D)); 107 F := D - Duration (S); 108 109 -- If F has negative value due to a round-up, adjust for positive F 110 -- value. 111 112 if F < 0.0 then 113 S := S - 1; 114 F := F + 1.0; 115 end if; 116 117 return timespec'(tv_sec => S, 118 tv_nsec => long (Long_Long_Integer (F * 10#1#E9))); 119 end To_Timespec; 120 121end System.OS_Interface; 122