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------------------------------------------------------------------------------
-- --
-- GNU ADA 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) 1999-2003 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- --
-- 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, 59 Temple Place - Suite 330, Boston, --
-- MA 02111-1307, 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 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. --
-- --
-- GNARL was developed by the GNARL team at Florida State University. --
-- Extensive contributions were provided by Ada Core Technologies, Inc. --
-- --
------------------------------------------------------------------------------
-- This is a LynxOS (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.
with Interfaces.C;
package body System.OS_Interface is
use Interfaces.C;
-------------------
-- clock_gettime --
-------------------
function clock_gettime
(clock_id : clockid_t;
tp : access timespec)
return int
is
function clock_gettime_base
(clock_id : clockid_t;
tp : access timespec)
return int;
pragma Import (C, clock_gettime_base, "clock_gettime");
begin
if clock_gettime_base (clock_id, tp) /= 0 then
return errno;
end if;
return 0;
end clock_gettime;
-----------------
-- 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;
function To_Duration (TV : struct_timeval) return Duration is
begin
return Duration (TV.tv_sec) + Duration (TV.tv_usec) / 10#1#E6;
end To_Duration;
-----------------
-- 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 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 timespec'(tv_sec => S,
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 : time_t;
F : Duration;
begin
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 < 0.0 then
S := S - 1;
F := F + 1.0;
end if;
return struct_timeval'(tv_sec => S,
tv_usec => time_t (Long_Long_Integer (F * 10#1#E6)));
end To_Timeval;
-------------------------
-- POSIX.1c Section 3 --
-------------------------
function sigwait
(set : access sigset_t;
sig : access Signal)
return int
is
function sigwait_base
(set : access sigset_t;
value : System.Address)
return Signal;
pragma Import (C, sigwait_base, "sigwait");
begin
sig.all := sigwait_base (set, Null_Address);
if sig.all = -1 then
return errno;
end if;
return 0;
end sigwait;
--------------------------
-- POSIX.1c Section 11 --
--------------------------
-- For all the following functions, LynxOS threads has the POSIX Draft 4
-- begavior; it sets errno but the standard Posix requires it to be
-- returned.
function pthread_mutexattr_init
(attr : access pthread_mutexattr_t)
return int
is
function pthread_mutexattr_create
(attr : access pthread_mutexattr_t)
return int;
pragma Import (C, pthread_mutexattr_create, "pthread_mutexattr_create");
begin
if pthread_mutexattr_create (attr) /= 0 then
return errno;
end if;
return 0;
end pthread_mutexattr_init;
function pthread_mutexattr_destroy
(attr : access pthread_mutexattr_t)
return int
is
function pthread_mutexattr_delete
(attr : access pthread_mutexattr_t)
return int;
pragma Import (C, pthread_mutexattr_delete, "pthread_mutexattr_delete");
begin
if pthread_mutexattr_delete (attr) /= 0 then
return errno;
end if;
return 0;
end pthread_mutexattr_destroy;
function pthread_mutex_init
(mutex : access pthread_mutex_t;
attr : access pthread_mutexattr_t)
return int
is
function pthread_mutex_init_base
(mutex : access pthread_mutex_t;
attr : pthread_mutexattr_t)
return int;
pragma Import (C, pthread_mutex_init_base, "pthread_mutex_init");
begin
if pthread_mutex_init_base (mutex, attr.all) /= 0 then
return errno;
end if;
return 0;
end pthread_mutex_init;
function pthread_mutex_destroy
(mutex : access pthread_mutex_t)
return int
is
function pthread_mutex_destroy_base
(mutex : access pthread_mutex_t)
return int;
pragma Import (C, pthread_mutex_destroy_base, "pthread_mutex_destroy");
begin
if pthread_mutex_destroy_base (mutex) /= 0 then
return errno;
end if;
return 0;
end pthread_mutex_destroy;
function pthread_mutex_lock
(mutex : access pthread_mutex_t)
return int
is
function pthread_mutex_lock_base
(mutex : access pthread_mutex_t)
return int;
pragma Import (C, pthread_mutex_lock_base, "pthread_mutex_lock");
begin
if pthread_mutex_lock_base (mutex) /= 0 then
return errno;
end if;
return 0;
end pthread_mutex_lock;
function pthread_mutex_unlock
(mutex : access pthread_mutex_t)
return int
is
function pthread_mutex_unlock_base
(mutex : access pthread_mutex_t)
return int;
pragma Import (C, pthread_mutex_unlock_base, "pthread_mutex_unlock");
begin
if pthread_mutex_unlock_base (mutex) /= 0 then
return errno;
end if;
return 0;
end pthread_mutex_unlock;
function pthread_condattr_init
(attr : access pthread_condattr_t)
return int
is
function pthread_condattr_create
(attr : access pthread_condattr_t)
return int;
pragma Import (C, pthread_condattr_create, "pthread_condattr_create");
begin
if pthread_condattr_create (attr) /= 0 then
return errno;
end if;
return 0;
end pthread_condattr_init;
function pthread_condattr_destroy
(attr : access pthread_condattr_t)
return int
is
function pthread_condattr_delete
(attr : access pthread_condattr_t)
return int;
pragma Import (C, pthread_condattr_delete, "pthread_condattr_delete");
begin
if pthread_condattr_delete (attr) /= 0 then
return errno;
end if;
return 0;
end pthread_condattr_destroy;
function pthread_cond_init
(cond : access pthread_cond_t;
attr : access pthread_condattr_t)
return int
is
function pthread_cond_init_base
(cond : access pthread_cond_t;
attr : pthread_condattr_t)
return int;
pragma Import (C, pthread_cond_init_base, "pthread_cond_init");
begin
if pthread_cond_init_base (cond, attr.all) /= 0 then
return errno;
end if;
return 0;
end pthread_cond_init;
function pthread_cond_destroy
(cond : access pthread_cond_t)
return int
is
function pthread_cond_destroy_base
(cond : access pthread_cond_t)
return int;
pragma Import (C, pthread_cond_destroy_base, "pthread_cond_destroy");
begin
if pthread_cond_destroy_base (cond) /= 0 then
return errno;
end if;
return 0;
end pthread_cond_destroy;
function pthread_cond_signal
(cond : access pthread_cond_t)
return int
is
function pthread_cond_signal_base
(cond : access pthread_cond_t)
return int;
pragma Import (C, pthread_cond_signal_base, "pthread_cond_signal");
begin
if pthread_cond_signal_base (cond) /= 0 then
return errno;
end if;
return 0;
end pthread_cond_signal;
function pthread_cond_wait
(cond : access pthread_cond_t;
mutex : access pthread_mutex_t)
return int
is
function pthread_cond_wait_base
(cond : access pthread_cond_t;
mutex : access pthread_mutex_t)
return int;
pragma Import (C, pthread_cond_wait_base, "pthread_cond_wait");
begin
if pthread_cond_wait_base (cond, mutex) /= 0 then
return errno;
end if;
return 0;
end pthread_cond_wait;
function pthread_cond_timedwait
(cond : access pthread_cond_t;
mutex : access pthread_mutex_t;
reltime : access timespec) return int
is
function pthread_cond_timedwait_base
(cond : access pthread_cond_t;
mutex : access pthread_mutex_t;
reltime : access timespec) return int;
pragma Import (C, pthread_cond_timedwait_base, "pthread_cond_timedwait");
begin
if pthread_cond_timedwait_base (cond, mutex, reltime) /= 0 then
if errno = EAGAIN then
return ETIMEDOUT;
end if;
return errno;
end if;
return 0;
end pthread_cond_timedwait;
--------------------------
-- POSIX.1c Section 13 --
--------------------------
function pthread_setschedparam
(thread : pthread_t;
policy : int;
param : access struct_sched_param)
return int
is
function pthread_setscheduler
(thread : pthread_t;
policy : int;
prio : int)
return int;
pragma Import (C, pthread_setscheduler, "pthread_setscheduler");
begin
if pthread_setscheduler (thread, policy, param.sched_priority) = -1 then
return errno;
end if;
return 0;
end pthread_setschedparam;
function pthread_mutexattr_setprotocol
(attr : access pthread_mutexattr_t;
protocol : int)
return int
is
pragma Unreferenced (attr, protocol);
begin
return 0;
end pthread_mutexattr_setprotocol;
function pthread_mutexattr_setprioceiling
(attr : access pthread_mutexattr_t;
prioceiling : int)
return int
is
pragma Unreferenced (attr, prioceiling);
begin
return 0;
end pthread_mutexattr_setprioceiling;
function pthread_attr_setscope
(attr : access pthread_attr_t;
contentionscope : int)
return int
is
pragma Unreferenced (attr, contentionscope);
begin
return 0;
end pthread_attr_setscope;
function sched_yield return int is
procedure pthread_yield;
pragma Import (C, pthread_yield, "pthread_yield");
begin
pthread_yield;
return 0;
end sched_yield;
-----------------------------
-- P1003.1c - Section 16 --
-----------------------------
function pthread_attr_setdetachstate
(attr : access pthread_attr_t;
detachstate : int)
return int
is
pragma Unreferenced (attr, detachstate);
begin
return 0;
end pthread_attr_setdetachstate;
function pthread_create
(thread : access pthread_t;
attributes : access pthread_attr_t;
start_routine : Thread_Body;
arg : System.Address)
return int
is
-- The LynxOS pthread_create doesn't seems to work.
-- Workaround : We're using st_new instead.
--
-- function pthread_create_base
-- (thread : access pthread_t;
-- attributes : pthread_attr_t;
-- start_routine : Thread_Body;
-- arg : System.Address)
-- return int;
-- pragma Import (C, pthread_create_base, "pthread_create");
St : aliased st_t := attributes.st;
function st_new
(start_routine : Thread_Body;
arg : System.Address;
attributes : access st_t;
thread : access pthread_t)
return int;
pragma Import (C, st_new, "st_new");
begin
-- Following code would be used if above commented function worked
-- if pthread_create_base
-- (thread, attributes.all, start_routine, arg) /= 0 then
if st_new (start_routine, arg, St'Access, thread) /= 0 then
return errno;
end if;
return 0;
end pthread_create;
function pthread_detach (thread : pthread_t) return int is
aliased_thread : aliased pthread_t := thread;
function pthread_detach_base (thread : access pthread_t) return int;
pragma Import (C, pthread_detach_base, "pthread_detach");
begin
if pthread_detach_base (aliased_thread'Access) /= 0 then
return errno;
end if;
return 0;
end pthread_detach;
--------------------------
-- POSIX.1c Section 17 --
--------------------------
function pthread_setspecific
(key : pthread_key_t;
value : System.Address)
return int
is
function pthread_setspecific_base
(key : pthread_key_t;
value : System.Address)
return int;
pragma Import (C, pthread_setspecific_base, "pthread_setspecific");
begin
if pthread_setspecific_base (key, value) /= 0 then
return errno;
end if;
return 0;
end pthread_setspecific;
function pthread_getspecific (key : pthread_key_t) return System.Address is
procedure pthread_getspecific_base
(key : pthread_key_t;
value : access System.Address);
pragma Import (C, pthread_getspecific_base, "pthread_getspecific");
value : aliased System.Address := System.Null_Address;
begin
pthread_getspecific_base (key, value'Unchecked_Access);
return value;
end pthread_getspecific;
function Get_Stack_Base (thread : pthread_t) return Address is
pragma Warnings (Off, thread);
begin
return Null_Address;
end Get_Stack_Base;
function pthread_key_create
(key : access pthread_key_t;
destructor : destructor_pointer)
return int
is
function pthread_keycreate
(key : access pthread_key_t;
destructor : destructor_pointer)
return int;
pragma Import (C, pthread_keycreate, "pthread_keycreate");
begin
if pthread_keycreate (key, destructor) /= 0 then
return errno;
end if;
return 0;
end pthread_key_create;
procedure pthread_init is
begin
null;
end pthread_init;
end System.OS_Interface;