------------------------------------------------------------------------------ -- -- -- 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) 1995-2005, AdaCore -- -- -- -- 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 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; 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; 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 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 if errno = EAGAIN then return ETIMEDOUT; else return errno; end if; 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;