-- --
-- B o d y --
-- --
--- Copyright (C) 1997-2006, Free Software Fundation, Inc. --
+-- Copyright (C) 1997-2009, 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- --
+-- ware Foundation; either version 3, or (at your option) any later ver- --
+-- sion. GNAT 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, 51 Franklin Street, Fifth Floor, --
--- Boston, MA 02110-1301, USA. --
+-- or FITNESS FOR A PARTICULAR PURPOSE. --
-- --
--- 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. --
+-- As a special exception under Section 7 of GPL version 3, you are granted --
+-- additional permissions described in the GCC Runtime Library Exception, --
+-- version 3.1, as published by the Free Software Foundation. --
+-- --
+-- You should have received a copy of the GNU General Public License and --
+-- a copy of the GCC Runtime Library Exception along with this program; --
+-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
+-- <http://www.gnu.org/licenses/>. --
-- --
-- GNARL was developed by the GNARL team at Florida State University. --
-- Extensive contributions were provided by Ada Core Technologies, Inc. --
-- This is a AIX (Native) version of this package
pragma Polling (Off);
--- Turn off polling, we do not want ATC polling to take place during
--- tasking operations. It causes infinite loops and other problems.
+-- Turn off polling, we do not want ATC polling to take place during tasking
+-- operations. It causes infinite loops and other problems.
package body System.OS_Interface is
return Duration (TS.tv_sec) + Duration (TS.tv_nsec) / 10#1#E9;
end To_Duration;
- function To_Duration (TV : struct_timeval) return Duration is
+ ------------------------
+ -- To_Target_Priority --
+ ------------------------
+
+ function To_Target_Priority
+ (Prio : System.Any_Priority) return Interfaces.C.int
+ is
+ Dispatching_Policy : Character;
+ pragma Import (C, Dispatching_Policy, "__gl_task_dispatching_policy");
+
+ Time_Slice_Val : Integer;
+ pragma Import (C, Time_Slice_Val, "__gl_time_slice_val");
+
begin
- return Duration (TV.tv_sec) + Duration (TV.tv_usec) / 10#1#E6;
- end To_Duration;
+ -- For the case SCHED_OTHER the only valid priority across all supported
+ -- versions of AIX is 1 (note that the scheduling policy can be set
+ -- with the pragma Task_Dispatching_Policy or setting the time slice
+ -- value). Otherwise, for SCHED_RR and SCHED_FIFO, the system defines
+ -- priorities in the range 1 .. 127. This means that we must map
+ -- System.Any_Priority in the range 0 .. 126 to 1 .. 127.
+
+ if Dispatching_Policy = ' ' and then Time_Slice_Val < 0 then
+ return 1;
+ else
+ return Interfaces.C.int (Prio) + 1;
+ end if;
+ end To_Target_Priority;
-----------------
-- To_Timespec --
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 is negative due to a round-up, adjust for positive F value
if F < 0.0 then
S := S - 1;
tv_nsec => long (Long_Long_Integer (F * 10#1#E9)));
end To_Timespec;
- ----------------
- -- To_Timeval --
- ----------------
-
- 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;
-
-------------------
-- clock_gettime --
-------------------
tp : access timespec)
return int
is
- pragma Warnings (Off, clock_id);
+ pragma Unreferenced (clock_id);
+
+ -- Older AIX don't have clock_gettime, so use gettimeofday
+
+ use Interfaces;
+ type timeval is array (1 .. 2) of C.long;
+
+ procedure timeval_to_duration
+ (T : not null access timeval;
+ sec : not null access C.long;
+ usec : not null access C.long);
+ pragma Import (C, timeval_to_duration, "__gnat_timeval_to_duration");
+
+ Micro : constant := 10**6;
+ sec : aliased C.long;
+ usec : aliased C.long;
+ TV : aliased timeval;
Result : int;
- tv : aliased struct_timeval;
function gettimeofday
- (tv : access struct_timeval;
- tz : System.Address := System.Null_Address)
- return int;
+ (Tv : access timeval;
+ Tz : System.Address := System.Null_Address) return int;
pragma Import (C, gettimeofday, "gettimeofday");
begin
- Result := gettimeofday (tv'Unchecked_Access);
- tp.all := To_Timespec (To_Duration (tv));
+ Result := gettimeofday (TV'Access, System.Null_Address);
+ pragma Assert (Result = 0);
+ timeval_to_duration (TV'Access, sec'Access, usec'Access);
+ tp.all := To_Timespec (Duration (sec) + Duration (usec) / Micro);
return Result;
end clock_gettime;
-- AIX Thread does not have sched_yield;
function sched_yield return int is
-
procedure pthread_yield;
pragma Import (C, pthread_yield, "sched_yield");
-
begin
pthread_yield;
return 0;
end sched_yield;
+ --------------------
+ -- Get_Stack_Base --
+ --------------------
+
function Get_Stack_Base (thread : pthread_t) return Address is
pragma Warnings (Off, thread);
-
begin
return Null_Address;
end Get_Stack_Base;
+ --------------------------
+ -- PTHREAD_PRIO_INHERIT --
+ --------------------------
+
+ AIX_Version : Integer := 0;
+ -- AIX version in the form xy for AIX version x.y (0 means not set)
+
+ SYS_NMLN : constant := 32;
+ -- AIX system constant used to define utsname, see sys/utsname.h
+
+ subtype String_NMLN is String (1 .. SYS_NMLN);
+
+ type utsname is record
+ sysname : String_NMLN;
+ nodename : String_NMLN;
+ release : String_NMLN;
+ version : String_NMLN;
+ machine : String_NMLN;
+ procserial : String_NMLN;
+ end record;
+ pragma Convention (C, utsname);
+
+ procedure uname (name : out utsname);
+ pragma Import (C, uname);
+
+ function PTHREAD_PRIO_INHERIT return int is
+ name : utsname;
+
+ function Val (C : Character) return Integer;
+ -- Transform a numeric character ('0' .. '9') to an integer
+
+ ---------
+ -- Val --
+ ---------
+
+ function Val (C : Character) return Integer is
+ begin
+ return Character'Pos (C) - Character'Pos ('0');
+ end Val;
+
+ -- Start of processing for PTHREAD_PRIO_INHERIT
+
+ begin
+ if AIX_Version = 0 then
+
+ -- Set AIX_Version
+
+ uname (name);
+ AIX_Version := Val (name.version (1)) * 10 + Val (name.release (1));
+ end if;
+
+ if AIX_Version < 53 then
+
+ -- Under AIX < 5.3, PTHREAD_PRIO_INHERIT is defined as 0 in pthread.h
+
+ return 0;
+
+ else
+ -- Under AIX >= 5.3, PTHREAD_PRIO_INHERIT is defined as 3
+
+ return 3;
+ end if;
+ end PTHREAD_PRIO_INHERIT;
+
end System.OS_Interface;
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