------------------------------------------------------------------------------ -- -- -- 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) 1999-2000 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 begin return 0; end pthread_mutexattr_setprotocol; function pthread_mutexattr_setprioceiling (attr : access pthread_mutexattr_t; prioceiling : int) return int is begin return 0; end pthread_mutexattr_setprioceiling; function pthread_attr_setscope (attr : access pthread_attr_t; contentionscope : int) return int is 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 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 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;