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) 2015-2016, Free Software Foundation, Inc. -- 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 the GNU/Hurd 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 38-- This package encapsulates all direct interfaces to OS services 39-- that are needed by children of System. 40 41package body System.OS_Interface is 42 43 -------------------- 44 -- Get_Stack_Base -- 45 -------------------- 46 47 function Get_Stack_Base (thread : pthread_t) return Address is 48 pragma Warnings (Off, thread); 49 50 begin 51 return Null_Address; 52 end Get_Stack_Base; 53 54 ------------------ 55 -- pthread_init -- 56 ------------------ 57 58 procedure pthread_init is 59 begin 60 null; 61 end pthread_init; 62 63 -------------------------------------- 64 -- pthread_mutexattr_setprioceiling -- 65 -------------------------------------- 66 67 function pthread_mutexattr_setprioceiling 68 (attr : access pthread_mutexattr_t; 69 prioceiling : int) return int is 70 pragma Unreferenced (attr, prioceiling); 71 begin 72 return 0; 73 end pthread_mutexattr_setprioceiling; 74 75 -------------------------------------- 76 -- pthread_mutexattr_getprioceiling -- 77 -------------------------------------- 78 79 function pthread_mutexattr_getprioceiling 80 (attr : access pthread_mutexattr_t; 81 prioceiling : access int) return int is 82 pragma Unreferenced (attr, prioceiling); 83 begin 84 return 0; 85 end pthread_mutexattr_getprioceiling; 86 87 --------------------------- 88 -- pthread_setschedparam -- 89 --------------------------- 90 91 function pthread_setschedparam 92 (thread : pthread_t; 93 policy : int; 94 param : access struct_sched_param) return int is 95 pragma Unreferenced (thread, policy, param); 96 begin 97 return 0; 98 end pthread_setschedparam; 99 100 ----------------- 101 -- To_Duration -- 102 ----------------- 103 104 function To_Duration (TS : timespec) return Duration is 105 begin 106 return Duration (TS.tv_sec) + Duration (TS.tv_nsec) / 10#1#E9; 107 end To_Duration; 108 109 ------------------------ 110 -- To_Target_Priority -- 111 ------------------------ 112 113 function To_Target_Priority 114 (Prio : System.Any_Priority) return Interfaces.C.int 115 is 116 begin 117 return Interfaces.C.int (Prio); 118 end To_Target_Priority; 119 120 ----------------- 121 -- To_Timespec -- 122 ----------------- 123 124 function To_Timespec (D : Duration) return timespec is 125 S : time_t; 126 F : Duration; 127 128 begin 129 S := time_t (Long_Long_Integer (D)); 130 F := D - Duration (S); 131 132 -- If F has negative value due to a round-up, adjust for positive F 133 -- value. 134 135 if F < 0.0 then 136 S := S - 1; 137 F := F + 1.0; 138 end if; 139 140 return timespec'(tv_sec => S, 141 tv_nsec => long (Long_Long_Integer (F * 10#1#E9))); 142 end To_Timespec; 143 144end System.OS_Interface; 145