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|
------------------------------------------------------------------------------
-- --
-- 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) 1991-1994, Florida State University --
-- Copyright (C) 1995-2010, AdaCore --
-- --
-- GNAT 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 DCE version of this package.
-- Currently HP-UX and SNI use this file
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.
-- This package encapsulates all direct interfaces to OS services
-- that are needed by children of System.
with Interfaces.C; use Interfaces.C;
package body System.OS_Interface is
-----------------
-- 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_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;
-------------------------
-- POSIX.1c Section 3 --
-------------------------
function sigwait
(set : access sigset_t;
sig : access Signal) return int
is
Result : int;
begin
Result := sigwait (set);
if Result = -1 then
sig.all := 0;
return errno;
end if;
sig.all := Signal (Result);
return 0;
end sigwait;
-- DCE_THREADS does not have pthread_kill. Instead, we just ignore it
function pthread_kill (thread : pthread_t; sig : Signal) return int is
pragma Unreferenced (thread, sig);
begin
return 0;
end pthread_kill;
--------------------------
-- POSIX.1c Section 11 --
--------------------------
-- For all following functions, DCE Threads has a non standard behavior.
-- 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;
else
return 0;
end if;
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;
else
return 0;
end if;
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;
else
return 0;
end if;
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;
else
return 0;
end if;
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;
else
return 0;
end if;
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;
else
return 0;
end if;
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;
else
return 0;
end if;
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;
else
return 0;
end if;
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;
else
return 0;
end if;
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;
else
return 0;
end if;
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;
else
return 0;
end if;
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;
else
return 0;
end if;
end pthread_cond_wait;
function pthread_cond_timedwait
(cond : access pthread_cond_t;
mutex : access pthread_mutex_t;
abstime : access timespec) return int
is
function pthread_cond_timedwait_base
(cond : access pthread_cond_t;
mutex : access pthread_mutex_t;
abstime : access timespec) return int;
pragma Import (C, pthread_cond_timedwait_base, "pthread_cond_timedwait");
begin
if pthread_cond_timedwait_base (cond, mutex, abstime) /= 0 then
return (if errno = EAGAIN then ETIMEDOUT else errno);
else
return 0;
end if;
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;
priority : int) return int;
pragma Import (C, pthread_setscheduler, "pthread_setscheduler");
begin
if pthread_setscheduler (thread, policy, param.sched_priority) = -1 then
return errno;
else
return 0;
end if;
end pthread_setschedparam;
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_init
(attributes : access pthread_attr_t) return int
is
function pthread_attr_create
(attributes : access pthread_attr_t) return int;
pragma Import (C, pthread_attr_create, "pthread_attr_create");
begin
if pthread_attr_create (attributes) /= 0 then
return errno;
else
return 0;
end if;
end pthread_attr_init;
function pthread_attr_destroy
(attributes : access pthread_attr_t) return int
is
function pthread_attr_delete
(attributes : access pthread_attr_t) return int;
pragma Import (C, pthread_attr_delete, "pthread_attr_delete");
begin
if pthread_attr_delete (attributes) /= 0 then
return errno;
else
return 0;
end if;
end pthread_attr_destroy;
function pthread_attr_setstacksize
(attr : access pthread_attr_t;
stacksize : size_t) return int
is
function pthread_attr_setstacksize_base
(attr : access pthread_attr_t;
stacksize : size_t) return int;
pragma Import (C, pthread_attr_setstacksize_base,
"pthread_attr_setstacksize");
begin
if pthread_attr_setstacksize_base (attr, stacksize) /= 0 then
return errno;
else
return 0;
end if;
end pthread_attr_setstacksize;
function pthread_create
(thread : access pthread_t;
attributes : access pthread_attr_t;
start_routine : Thread_Body;
arg : System.Address) return int
is
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");
begin
if pthread_create_base
(thread, attributes.all, start_routine, arg) /= 0
then
return errno;
else
return 0;
end if;
end pthread_create;
--------------------------
-- 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;
else
return 0;
end if;
end pthread_setspecific;
function pthread_getspecific (key : pthread_key_t) return System.Address is
function pthread_getspecific_base
(key : pthread_key_t;
value : access System.Address) return int;
pragma Import (C, pthread_getspecific_base, "pthread_getspecific");
Addr : aliased System.Address;
begin
if pthread_getspecific_base (key, Addr'Access) /= 0 then
return System.Null_Address;
else
return Addr;
end if;
end pthread_getspecific;
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;
else
return 0;
end if;
end pthread_key_create;
function Get_Stack_Base (thread : pthread_t) return Address is
pragma Warnings (Off, thread);
begin
return Null_Address;
end Get_Stack_Base;
procedure pthread_init is
begin
null;
end pthread_init;
function intr_attach (sig : int; handler : isr_address) return long is
function c_signal (sig : int; handler : isr_address) return long;
pragma Import (C, c_signal, "signal");
begin
return c_signal (sig, handler);
end intr_attach;
end System.OS_Interface;
|
