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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) 1999-2007, 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- --
+-- 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, 51 Franklin Street, Fifth Floor, --
+-- Boston, MA 02110-1301, 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.
+
+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;
+
+ ------------------------
+ -- To_Target_Priority --
+ ------------------------
+
+ function To_Target_Priority
+ (Prio : System.Any_Priority) return Interfaces.C.int
+ is
+ begin
+ return Interfaces.C.int (Prio);
+ 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 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
+ 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;
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