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31f08be6a3
Note you need an existing gnat compiler to build this. (A package will do.) PR: 3687 Submitted by: Maurice Castro <maurice@planet.serc.rmit.edu.au> and Daniel M. Eischen <deischen@iworks.InterWorks.org>
140 lines
6.1 KiB
Ada
140 lines
6.1 KiB
Ada
------------------------------------------------------------------------------
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-- --
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-- GNU ADA RUNTIME 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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-- (Version for new GNARL) --
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-- --
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-- $Revision: 1.2 $ --
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-- --
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-- Copyright (C) 1991,1992,1993,1994,1995,1996 Florida State University --
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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 2, or (at your option) any later ver- --
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-- sion. GNARL 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. See the GNU General Public License --
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-- for more details. You should have received a copy of the GNU General --
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-- Public License distributed with GNARL; see file COPYING. If not, write --
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-- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
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-- MA 02111-1307, USA. --
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-- --
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-- As a special exception, if other files instantiate generics from this --
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-- unit, or you link this unit with other files to produce an executable, --
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-- this unit does not by itself cause the resulting executable to be --
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-- covered by the GNU General Public License. This exception does not --
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-- however invalidate any other reasons why the executable file might be --
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-- covered by the GNU Public License. --
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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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-- This is only a first approximation.
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-- It should be autogenerated by the m4 macro processor.
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-- Contributed by Daniel M. Eischen (deischen@iworks.InterWorks.org)
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-- DO NOT EDIT this file.
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-- It was automatically generated from another file by the m4 macro processor.
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-- The name of the file you should edit is the same as this one, but with
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-- ".ads" replaced by ".sm4", or
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-- ".adb" replaced by ".bm4", or
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-- ".c" replaced by ".cm4", or
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-- ".dat" replaced by ".tm4"
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-- Local options selected:
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-- __TARGET = i386-unknown-freebsd
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-- __ARCH = I386
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-- __OS = FREEBSD
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-- __HAS_SIGCONTEXT = 1
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-- __HAS_UCONTEXT = 0
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-- __THREADS = POSIX_THREADS
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-- __THREAD_VARIANT = ??
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-- __HAS_TIMESPEC = 1
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-- __HAS_NANOSLEEP = 1
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-- __HAS_CLOCK_GETTIME = 0
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-- __HAS_GETTIMEOFDAY = 1
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-- __POSIX_THREAD_PRIO_PROTECT = 0
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-- __POSIX_THREAD_PRIO_INHERIT = 0
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-- __POSIX_THREAD_ATTR_STACKADDR = 1
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-- __POSIX_THREAD_ATTR_STACKSIZE = 1
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-- __POSIX_THREAD_PRIORITY_SCHEDULING = 0
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-- This package encapsulates all direct interfaces to OS services
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-- that are needed by children of System.
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-- This version is for POSIX-like operating systems
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-- The original file "s-osinte.ads_m4" contains conditional
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-- macro calls that allow selection of various options.
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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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-- 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_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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-- value.
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if F < 0.0 then S := S - 1; F := F + 1.0; 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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function To_Duration (TV : struct_timeval) return Duration is
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begin
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return Duration (TV.tv_sec) + Duration (TV.tv_usec) / 10#1#E6;
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end To_Duration;
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function To_Timeval (D : Duration) return struct_timeval is
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S : long;
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F : Duration;
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begin
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S := long (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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-- value.
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if F < 0.0 then S := S - 1; F := F + 1.0; end if;
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return struct_timeval' (tv_sec => S,
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tv_usec => long (Long_Long_Integer (F * 10#1#E6)));
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end To_Timeval;
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-- FreeBSD Pthreads has pthread_yield and it is imported as
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-- sched_yield in 5fosinte.ads. The FreeBSD pthread_yield does
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-- not have any parameters, so the import may be used directly
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-- without the need for a wrapper as shown below.
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-- function sched_yield return int is
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-- procedure sched_yield_base (arg : System.Address);
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-- pragma Import (C, sched_yield_base, "pthread_yield");
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-- begin
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-- sched_yield_base (System.Null_Address);
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-- return 0;
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-- end sched_yield;
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end System.OS_Interface;
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