1------------------------------------------------------------------------------ 2-- -- 3-- GNU ADA 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) 1991-2009 Florida State University -- 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. It is -- 28-- now maintained by Ada Core Technologies Inc. in cooperation with Florida -- 29-- State University (http://www.gnat.com). -- 30-- -- 31-- The GNARL files that were developed for RTEMS are maintained by On-Line -- 32-- Applications Research Corporation (http://www.oarcorp.com) in coopera- -- 33-- tion with Ada Core Technologies Inc. and Florida State University. -- 34-- -- 35------------------------------------------------------------------------------ 36 37-- This is the RTEMS version of this package 38 39-- This package encapsulates all direct interfaces to OS services 40-- that are needed by children of System. 41 42pragma Polling (Off); 43-- Turn off polling, we do not want ATC polling to take place during 44-- tasking operations. It causes infinite loops and other problems. 45 46with Interfaces.C; use Interfaces.C; 47package body System.OS_Interface is 48 49 ----------------- 50 -- To_Duration -- 51 ----------------- 52 53 function To_Duration (TS : timespec) return Duration is 54 begin 55 return Duration (TS.tv_sec) + Duration (TS.tv_nsec) / 10#1#E9; 56 end To_Duration; 57 58 ------------------------ 59 -- To_Target_Priority -- 60 ------------------------ 61 62 function To_Target_Priority 63 (Prio : System.Any_Priority) return Interfaces.C.int 64 is 65 begin 66 return Interfaces.C.int (Prio); 67 end To_Target_Priority; 68 69 ----------------- 70 -- To_Timespec -- 71 ----------------- 72 73 function To_Timespec (D : Duration) return timespec is 74 S : time_t; 75 F : Duration; 76 begin 77 S := time_t (Long_Long_Integer (D)); 78 F := D - Duration (S); 79 80 -- If F has negative value due to round-up, adjust for positive F value 81 82 if F < 0.0 then 83 S := S - 1; 84 F := F + 1.0; 85 end if; 86 return timespec'(tv_sec => S, 87 tv_nsec => long (Long_Long_Integer (F * 10#1#E9))); 88 end To_Timespec; 89 90 ------------------ 91 -- pthread_init -- 92 ------------------ 93 94 procedure pthread_init is 95 begin 96 null; 97 end pthread_init; 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 -- sigaltstack -- 112 ----------------- 113 114 function sigaltstack 115 (ss : not null access stack_t; 116 oss : access stack_t) return int is 117 pragma Unreferenced (ss); 118 pragma Unreferenced (oss); 119 begin 120 return 0; 121 end sigaltstack; 122 123 ----------------------------------- 124 -- pthread_rwlockattr_setkind_np -- 125 ----------------------------------- 126 127 function pthread_rwlockattr_setkind_np 128 (attr : access pthread_rwlockattr_t; 129 pref : int) return int is 130 pragma Unreferenced (attr); 131 pragma Unreferenced (pref); 132 begin 133 return 0; 134 end pthread_rwlockattr_setkind_np; 135 136end System.OS_Interface; 137