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s-osinte-aix.adb: map Ada priorities to target priorities appropriately for different scheduling... 

2007-04-20  Matthew Gingell  <gingell@adacore.com>

	* s-osinte-aix.adb: map Ada priorities to target
	priorities appropriately for different scheduling policies.

From-SVN: r125367
This commit is contained in:
Matthew Gingell 2007-06-06 12:15:34 +02:00 committed by Arnaud Charlet
parent 6bb81bc17c
commit 73d39ad24e
1 changed files with 18 additions and 11 deletions
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29
gcc/ada/s-osinte-aix.adb
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@ -6,7 +6,7 @@
-- --
-- B o d y --
-- --
-- Copyright (C) 1997-2006, Free Software Fundation, Inc. --
-- Copyright (C) 1997-2007, 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- --
@ -34,8 +34,8 @@
-- 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
@ -62,11 +62,20 @@ package body System.OS_Interface is
function To_Target_Priority
(Prio : System.Any_Priority) return Interfaces.C.int
is
begin
-- Priorities on AIX are defined in the range 1 .. 127, so we
-- map 0 .. 126 to 1 .. 127.
Dispatching_Policy : Character;
pragma Import (C, Dispatching_Policy, "__gl_task_dispatching_policy");
return Interfaces.C.int (Prio) + 1;
begin
-- For the case SCHED_OTHER the only valid priority across all supported
-- versions of AIX is 1. 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 = ' ' then
return 1;
else
return Interfaces.C.int (Prio) + 1;
end if;
end To_Target_Priority;
-----------------
@ -81,8 +90,7 @@ package body System.OS_Interface is
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;
@ -105,8 +113,7 @@ package body System.OS_Interface is
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 is negative due to a round-up, adjust for positive F value
if F < 0.0 then
S := S - 1;