------------------------------------------------------------------------------ -- -- -- 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: 1.1 $ -- -- -- -- 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 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; type sigset_t_ptr is access all sigset_t; function pthread_sigmask_set (how : int; set : access sigset_t) return int is function sigmask_set (how : int; set : access sigset_t; oset : sigset_t_ptr) return int; pragma Import (C, sigmask_set, "pthread_sigmask"); begin return sigmask_set (how, set, null); end pthread_sigmask_set; function pthread_sigmask_oset (how : int; oset : access sigset_t) return int is function sigmask_oset (how : int; set : sigset_t_ptr; oset : access sigset_t) return int; pragma Import (C, sigmask_oset, "pthread_sigmask"); begin return sigmask_oset (how, null, oset); end pthread_sigmask_oset; ----------------- -- 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;