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Diffstat (limited to 'lang/gnat/files/5fosinte.adb')
| -rw-r--r-- | lang/gnat/files/5fosinte.adb | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/lang/gnat/files/5fosinte.adb b/lang/gnat/files/5fosinte.adb new file mode 100644 index 000000000000..33d4bcfd2b89 --- /dev/null +++ b/lang/gnat/files/5fosinte.adb @@ -0,0 +1,139 @@ +------------------------------------------------------------------------------ +-- -- +-- GNU ADA RUNTIME LIBRARY (GNARL) COMPONENTS -- +-- -- +-- S Y S T E M . O S _ I N T E R F A C E -- +-- -- +-- B o d y -- +-- (Version for new GNARL) -- +-- -- +-- $Revision: 1.2 $ -- +-- -- +-- Copyright (C) 1991,1992,1993,1994,1995,1996 Florida State University -- +-- -- +-- 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, 59 Temple Place - Suite 330, Boston, -- +-- MA 02111-1307, 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 + +-- This is only a first approximation. +-- It should be autogenerated by the m4 macro processor. +-- Contributed by Daniel M. Eischen (deischen@iworks.InterWorks.org) + +-- DO NOT EDIT this file. +-- It was automatically generated from another file by the m4 macro processor. +-- The name of the file you should edit is the same as this one, but with +-- ".ads" replaced by ".sm4", or +-- ".adb" replaced by ".bm4", or +-- ".c" replaced by ".cm4", or +-- ".dat" replaced by ".tm4" + +-- Local options selected: +-- __TARGET = i386-unknown-freebsd +-- __ARCH = I386 +-- __OS = FREEBSD +-- __HAS_SIGCONTEXT = 1 +-- __HAS_UCONTEXT = 0 +-- __THREADS = POSIX_THREADS +-- __THREAD_VARIANT = ?? +-- __HAS_TIMESPEC = 1 +-- __HAS_NANOSLEEP = 1 +-- __HAS_CLOCK_GETTIME = 0 +-- __HAS_GETTIMEOFDAY = 1 +-- __POSIX_THREAD_PRIO_PROTECT = 0 +-- __POSIX_THREAD_PRIO_INHERIT = 0 +-- __POSIX_THREAD_ATTR_STACKADDR = 1 +-- __POSIX_THREAD_ATTR_STACKSIZE = 1 +-- __POSIX_THREAD_PRIORITY_SCHEDULING = 0 + +-- This package encapsulates all direct interfaces to OS services +-- that are needed by children of System. + +-- This version is for POSIX-like operating systems +-- The original file "s-osinte.ads_m4" contains conditional +-- macro calls that allow selection of various options. + +with Interfaces.C; use Interfaces.C; +package body System.OS_Interface is + + ----------------- + -- 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; + + -- FreeBSD Pthreads has pthread_yield and it is imported as + -- sched_yield in 5fosinte.ads. The FreeBSD pthread_yield does + -- not have any parameters, so the import may be used directly + -- without the need for a wrapper as shown below. +-- function sched_yield return int is +-- procedure sched_yield_base (arg : System.Address); +-- pragma Import (C, sched_yield_base, "pthread_yield"); +-- begin +-- sched_yield_base (System.Null_Address); +-- return 0; +-- end sched_yield; + +end System.OS_Interface; |