------------------------------------------------------------------------------ -- -- -- GNU ADA RUN-TIME LIBRARY (GNARL) COMPONENTS -- -- -- -- S Y S T E M . O S _ I N T E R F A C E -- -- -- -- S p e c -- -- -- -- Copyright (C) 1991-1994, Florida State University -- -- Copyright (C) 1995-2004, 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, 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. -- -- Extensive contributions were provided by Ada Core Technologies, Inc. -- -- -- ------------------------------------------------------------------------------ -- This is the OS/2 version of this package -- This package encapsulates all direct interfaces to OS services -- that are needed by children of System. -- PLEASE DO NOT add any with-clauses to this package or remove the pragma -- Preelaborate. This package is designed to be a bottom-level (leaf) package. with Interfaces.C; package System.OS_Interface is pragma Preelaborate; package C renames Interfaces.C; subtype int is C.int; subtype unsigned_long is C.unsigned_long; type Duration_In_Millisec is new C.long; -- New type to prevent confusing time functions in this package -- with time functions returning seconds or other units. type Thread_Id is new unsigned_long; ----------- -- Errno -- ----------- function errno return int; pragma Import (C, errno, "__get_errno"); EAGAIN : constant := 5; EINTR : constant := 13; EINVAL : constant := 14; ENOMEM : constant := 25; ------------- -- Signals -- ------------- Max_Interrupt : constant := 15; type Signal is new int range 0 .. Max_Interrupt; -- Signals for OS/2, only SIGTERM used currently. The values are -- fake, since OS/2 uses 32 bit exception numbers that cannot be -- used to index arrays etc. The GNULLI maps these Unix-like signals -- to OS/2 exception numbers. -- SIGTERM is used for the abort interrupt. SIGHUP : constant := 1; -- hangup SIGINT : constant := 2; -- interrupt (rubout) SIGQUIT : constant := 3; -- quit (ASCD FS) SIGILL : constant := 4; -- illegal instruction (not reset) SIGTRAP : constant := 5; -- trace trap (not reset) SIGIOT : constant := 6; -- IOT instruction SIGEMT : constant := 0; -- EMT instruction SIGFPE : constant := 8; -- floating point exception SIGKILL : constant := 9; -- kill (cannot be caught or ignored) SIGBUS : constant := 10; -- bus error SIGSEGV : constant := 11; -- segmentation violation SIGSYS : constant := 12; -- bad argument to system call SIGPIPE : constant := 13; -- write on a pipe with no one to read it SIGALRM : constant := 14; -- alarm clock SIGTERM : constant := 15; -- software termination signal from kill subtype sigset_t is unsigned_long; ---------- -- Time -- ---------- function Clock return Duration; pragma Inline (Clock); -- Clock measuring time since the epoch, which is the boot-time. -- The clock resolution is approximately 838 ns. procedure Delay_For (Period : in Duration_In_Millisec); pragma Inline (Delay_For); -- Changed Sleep to Delay_For, for consistency with System.Time_Operations ---------------- -- Scheduling -- ---------------- -- Put the calling task at the end of the ready queue for its priority procedure Yield; pragma Inline (Yield); end System.OS_Interface;