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jeremybenn |
------------------------------------------------------------------------------
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-- --
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-- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS --
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-- --
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-- S Y S T E M . O S _ I N T E R F A C E --
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-- --
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-- B o d y --
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-- --
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-- Copyright (C) 1991-2009, Free Software Foundation, Inc. --
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-- --
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-- GNARL is free software; you can redistribute it and/or modify it under --
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-- terms of the GNU General Public License as published by the Free Soft- --
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-- ware Foundation; either version 3, or (at your option) any later ver- --
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-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE. --
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-- --
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-- As a special exception under Section 7 of GPL version 3, you are granted --
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-- additional permissions described in the GCC Runtime Library Exception, --
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-- version 3.1, as published by the Free Software Foundation. --
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-- --
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-- You should have received a copy of the GNU General Public License and --
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-- a copy of the GCC Runtime Library Exception along with this program; --
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-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
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-- <http://www.gnu.org/licenses/>. --
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-- --
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-- GNARL was developed by the GNARL team at Florida State University. It is --
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-- now maintained by Ada Core Technologies Inc. in cooperation with Florida --
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-- State University (http://www.gnat.com). --
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-- --
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------------------------------------------------------------------------------
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-- This is the FreeBSD THREADS version of this package
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with Interfaces.C; use Interfaces.C;
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package body System.OS_Interface is
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-----------
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-- Errno --
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-----------
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function Errno return int is
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type int_ptr is access all int;
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function internal_errno return int_ptr;
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pragma Import (C, internal_errno, "__error");
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begin
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return (internal_errno.all);
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end Errno;
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--------------------
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-- Get_Stack_Base --
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--------------------
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function Get_Stack_Base (thread : pthread_t) return Address is
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pragma Unreferenced (thread);
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begin
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return (0);
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end Get_Stack_Base;
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------------------
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-- pthread_init --
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------------------
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procedure pthread_init is
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begin
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null;
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end pthread_init;
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-----------------
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-- To_Duration --
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-----------------
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function To_Duration (TS : timespec) return Duration is
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begin
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return Duration (TS.ts_sec) + Duration (TS.ts_nsec) / 10#1#E9;
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end To_Duration;
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------------------------
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-- To_Target_Priority --
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------------------------
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function To_Target_Priority
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(Prio : System.Any_Priority) return Interfaces.C.int
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is
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begin
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return Interfaces.C.int (Prio);
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end To_Target_Priority;
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-----------------
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-- To_Timespec --
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-----------------
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function To_Timespec (D : Duration) return timespec is
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S : time_t;
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F : Duration;
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begin
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S := time_t (Long_Long_Integer (D));
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F := D - Duration (S);
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-- If F has negative value due to a round-up, adjust for positive F
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if F < 0.0 then
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S := S - 1;
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F := F + 1.0;
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end if;
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return timespec'(ts_sec => S,
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ts_nsec => long (Long_Long_Integer (F * 10#1#E9)));
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end To_Timespec;
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end System.OS_Interface;
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