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------------------------------------------------------------------------------
-- --
-- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS --
-- --
-- S Y S T E M . O S _ I N T E R F A C E --
-- --
-- B o d y --
-- --
-- Copyright (C) 1991-2005 Free Software Foundation, Inc. --
-- --
-- GNARL is free software; you can redistribute it and/or modify it under --
-- terms of the GNU General Public License as published by the Free Soft- --
-- ware Foundation; either version 2, or (at your option) any later ver- --
-- sion. GNARL is distributed in the hope that it will be useful, but WITH- --
-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
-- for more details. You should have received a copy of the GNU General --
-- Public License distributed with GNARL; see file COPYING. If not, write --
-- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
-- Boston, MA 02110-1301, USA. --
-- --
-- As a special exception, if other files instantiate generics from this --
-- unit, or you link this unit with other files to produce an executable, --
-- this unit does not by itself cause the resulting executable to be --
-- covered by the GNU General Public License. This exception does not --
-- however invalidate any other reasons why the executable file might be --
-- covered by the GNU Public License. --
-- --
-- GNARL was developed by the GNARL team at Florida State University. It is --
-- now maintained by Ada Core Technologies Inc. in cooperation with Florida --
-- State University (http://www.gnat.com). --
-- --
------------------------------------------------------------------------------
-- This is the FreeBSD THREADS version of this package
with Interfaces.C; use Interfaces.C;
package body System.OS_Interface is
function Errno return int is
type int_ptr is access all int;
function internal_errno return int_ptr;
pragma Import (C, internal_errno, "__error");
begin
return (internal_errno.all);
end Errno;
function Get_Stack_Base (thread : pthread_t) return Address is
pragma Unreferenced (thread);
begin
return (0);
end Get_Stack_Base;
procedure pthread_init is
begin
null;
end pthread_init;
-----------------
-- To_Duration --
-----------------
function To_Duration (TS : timespec) return Duration is
begin
return Duration (TS.ts_sec) + Duration (TS.ts_nsec) / 10#1#E9;
end To_Duration;
-----------------
-- To_Timespec --
-----------------
function To_Timespec (D : Duration) return timespec is
S : time_t;
F : Duration;
begin
S := time_t (Long_Long_Integer (D));
F := D - Duration (S);
-- If F has negative value due to a round-up, adjust for positive F
-- value.
if F < 0.0 then S := S - 1; F := F + 1.0; end if;
return timespec'(ts_sec => S,
ts_nsec => long (Long_Long_Integer (F * 10#1#E9)));
end To_Timespec;
function To_Duration (TV : struct_timeval) return Duration is
begin
return Duration (TV.tv_sec) + Duration (TV.tv_usec) / 10#1#E6;
end To_Duration;
function To_Timeval (D : Duration) return struct_timeval is
S : long;
F : Duration;
begin
S := long (Long_Long_Integer (D));
F := D - Duration (S);
-- If F has negative value due to a round-up, adjust for positive F
-- value.
if F < 0.0 then S := S - 1; F := F + 1.0; end if;
return struct_timeval'(tv_sec => S,
tv_usec => long (Long_Long_Integer (F * 10#1#E6)));
end To_Timeval;
end System.OS_Interface;
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