| ------------------------------------------------------------------------------ |
| -- -- |
| -- 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) 1997-2009, 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 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 |
| |
| 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. |
| |
| 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; |
| |
| ------------------- |
| -- clock_gettime -- |
| ------------------- |
| |
| function clock_gettime |
| (clock_id : clockid_t; |
| tp : access timespec) |
| return int |
| is |
| 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; |
| |
| function gettimeofday |
| (Tv : access timeval; |
| Tz : System.Address := System.Null_Address) return int; |
| pragma Import (C, gettimeofday, "gettimeofday"); |
| |
| begin |
| 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; |
| |
| ----------------- |
| -- 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; |
