1 ------------------------------------------------------------------------------
3 -- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS --
5 -- S Y S T E M . O S _ I N T E R F A C E --
9 -- Copyright (C) 2001-2020, AdaCore --
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. --
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. --
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/>. --
27 -- GNARL was developed by the GNARL team at Florida State University. --
28 -- Extensive contributions were provided by Ada Core Technologies, Inc. --
30 ------------------------------------------------------------------------------
32 -- Version of System.OS_Interface for LynxOS-178 (POSIX Threads)
35 -- Turn off polling, we do not want ATC polling to take place during tasking
36 -- operations. It may cause infinite loops and other problems.
38 package body System.OS_Interface is
44 function Current_CPU return Multiprocessors.CPU is
46 -- No multiprocessor support, always return the first CPU Id
48 return Multiprocessors.CPU'First;
55 function Get_Affinity (Id : Thread_Id) return Multiprocessors.CPU_Range is
56 pragma Unreferenced (Id);
59 -- No multiprocessor support, always return Not_A_Specific_CPU
61 return Multiprocessors.Not_A_Specific_CPU;
68 function Get_CPU (Id : Thread_Id) return Multiprocessors.CPU is
69 pragma Unreferenced (Id);
72 -- No multiprocessor support, always return the first CPU Id
74 return Multiprocessors.CPU'First;
81 SC_PAGESIZE : constant := 17;
82 -- C macro to get pagesize value from sysconf
84 function sysconf (name : int) return long;
85 pragma Import (C, sysconf, "sysconf");
87 function Get_Page_Size return int is
89 return int (sysconf (SC_PAGESIZE));
96 function To_Duration (TS : timespec) return Duration is
98 return Duration (TS.tv_sec) + Duration (TS.tv_nsec) / 10#1#E9;
101 ------------------------
102 -- To_Target_Priority --
103 ------------------------
105 function To_Target_Priority
106 (Prio : System.Any_Priority) return Interfaces.C.int
109 return Interfaces.C.int (Prio);
110 end To_Target_Priority;
116 function To_Timespec (D : Duration) return timespec is
121 S := time_t (Long_Long_Integer (D));
122 F := D - Duration (S);
124 -- If F is negative due to a round-up, adjust for positive F value
131 return timespec'(tv_sec => S,
132 tv_nsec => long (Long_Long_Integer (F * 10#1#E9)));
140 (set : access sigset_t;
145 (set : access sigset_t;
146 info : System.Address) return Signal;
147 pragma Import (C, sigwaitinfo, "sigwaitinfo");
150 sig.all := sigwaitinfo (set, Null_Address);
163 function Get_Stack_Base (thread : pthread_t) return Address is
164 pragma Warnings (Off, thread);
173 procedure pthread_init is
178 end System.OS_Interface;