------------------------------------------------------------------------------
-- --
--- GNU ADA RUN-TIME LIBRARY (GNARL) COMPONENTS --
+-- GNAT 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. --
+-- Copyright (C) 1995-2008, 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- --
-- 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. --
+-- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
+-- Boston, MA 02110-1301, 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 is a LynxOS (POSIX Threads) version of this package
-- This package encapsulates all direct interfaces to OS services
--- that are needed by children of System.
+-- that are needed by the tasking run-time (libgnarl).
-- 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 Ada.Unchecked_Conversion;
+
with Interfaces.C;
-with Unchecked_Conversion;
package System.OS_Interface is
pragma Preelaborate;
--
--
-- The lowest numbered signal is 1, but 0 is a valid argument to some
- -- library functions, eg. kill(2). However, 0 is not just another
+ -- library functions, e.g. kill(2). However, 0 is not just another
-- signal: For instance 'I in Signal' and similar should be used with
-- caution.
pragma Convention (C, struct_sigaction);
type struct_sigaction_ptr is access all struct_sigaction;
- SA_SIGINFO : constant := 16#80#;
+ SA_SIGINFO : constant := 16#80#;
+
+ SA_ONSTACK : constant := 16#00#;
+ -- SA_ONSTACK is not defined on LynxOS, but it is referred to in the POSIX
+ -- implementation of System.Interrupt_Management. Therefore we define a
+ -- dummy value of zero here so that setting this flag is a nop.
SIG_BLOCK : constant := 0;
SIG_UNBLOCK : constant := 1;
pragma Convention (C, struct_timezone);
type struct_timezone_ptr is access all struct_timezone;
- type struct_timeval is private;
- -- This is needed on systems that do not have clock_gettime()
- -- but do have gettimeofday().
-
- function To_Duration (TV : struct_timeval) return Duration;
- pragma Inline (To_Duration);
-
- function To_Timeval (D : Duration) return struct_timeval;
- pragma Inline (To_Timeval);
-
-------------------------
-- Priority Scheduling --
-------------------------
type Thread_Body is access
function (arg : System.Address) return System.Address;
+ pragma Convention (C, Thread_Body);
function Thread_Body_Access is new
- Unchecked_Conversion (System.Address, Thread_Body);
+ Ada.Unchecked_Conversion (System.Address, Thread_Body);
type pthread_t is private;
subtype Thread_Id is pthread_t;
-- Stack --
-----------
+ Alternate_Stack_Size : constant := 0;
+ -- No alternate signal stack is used on this platform
+
Stack_Base_Available : constant Boolean := False;
- -- Indicates whether the stack base is available on this target.
+ -- Indicates whether the stack base is available on this target
function Get_Stack_Base (thread : pthread_t) return Address;
pragma Inline (Get_Stack_Base);
sig : Signal) return int;
pragma Import (C, pthread_kill, "pthread_kill");
- type sigset_t_ptr is access all sigset_t;
-
function pthread_sigmask
(how : int;
- set : sigset_t_ptr;
- oset : sigset_t_ptr) return int;
+ set : access sigset_t;
+ oset : access sigset_t) return int;
pragma Import (C, pthread_sigmask, "pthread_sigmask");
-- The behavior of pthread_sigmask on LynxOS requires
-- further investigation.
pragma Import (C, st_getspecific, "st_getspecific");
type destructor_pointer is access procedure (arg : System.Address);
+ pragma Convention (C, destructor_pointer);
function st_keycreate
(destructor : destructor_pointer;
type clockid_t is new unsigned_char;
CLOCK_REALTIME : constant clockid_t := 0;
- type struct_timeval is record
- tv_sec : time_t;
- tv_usec : time_t;
- end record;
- pragma Convention (C, struct_timeval);
-
type st_attr_t is record
stksize : int;
prio : int;
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