187 lines
6.3 KiB
Ada
187 lines
6.3 KiB
Ada
------------------------------------------------------------------------------
|
|
-- --
|
|
-- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS --
|
|
-- --
|
|
-- S Y S T E M . O S _ I N T E R F A C E --
|
|
-- --
|
|
-- B o d y --
|
|
-- --
|
|
-- Copyright (C) 1997-2020, 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 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. --
|
|
-- --
|
|
-- 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
|
|
|
|
package body System.OS_Interface is
|
|
|
|
use Interfaces.C;
|
|
|
|
-----------------
|
|
-- To_Duration --
|
|
-----------------
|
|
|
|
function To_Duration (TS : timespec) return Duration is
|
|
begin
|
|
return Duration (TS.tv_sec) + Duration (TS.tv_nsec) / 10#1#E9;
|
|
end To_Duration;
|
|
|
|
------------------------
|
|
-- 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
|
|
-- 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 --
|
|
-----------------
|
|
|
|
function To_Timespec (D : Duration) return timespec is
|
|
S : time_t;
|
|
F : Duration;
|
|
|
|
begin
|
|
S := time_t (Long_Long_Integer (D));
|
|
F := D - Duration (S);
|
|
|
|
-- If F is negative 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 timespec'(tv_sec => S,
|
|
tv_nsec => long (Long_Long_Integer (F * 10#1#E9)));
|
|
end To_Timespec;
|
|
|
|
-----------------
|
|
-- sched_yield --
|
|
-----------------
|
|
|
|
-- 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;
|