| ------------------------------------------------------------------------------ |
| -- -- |
| -- 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) 1995-2003, Ada Core Technologies -- |
| -- -- |
| -- 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. |
| |
| -- It 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; |
