| ------------------------------------------------------------------------------ |
| -- -- |
| -- 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) 1991-1994, Florida State University -- |
| -- Copyright (C) 1995-2003, Ada Core Technologies -- |
| -- -- |
| -- 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 FSU Threads 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; |
| |
| ----------------- |
| -- 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 : long; |
| F : Duration; |
| |
| begin |
| S := long (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 => long (Long_Long_Integer (F * 10#1#E6))); |
| end To_Timeval; |
| |
| ------------- |
| -- sigwait -- |
| ------------- |
| |
| -- FSU_THREADS has a nonstandard sigwait |
| |
| function sigwait |
| (set : access sigset_t; |
| sig : access Signal) return int |
| is |
| Result : int; |
| |
| function sigwait_base (set : access sigset_t) return int; |
| pragma Import (C, sigwait_base, "sigwait"); |
| |
| begin |
| Result := sigwait_base (set); |
| |
| if Result = -1 then |
| sig.all := 0; |
| return errno; |
| end if; |
| |
| sig.all := Signal (Result); |
| return 0; |
| end sigwait; |
| |
| ------------------------ |
| -- pthread_mutex_lock -- |
| ------------------------ |
| |
| -- FSU_THREADS has nonstandard pthread_mutex_lock and unlock. |
| -- It sets errno but the standard Posix requires it to be returned. |
| |
| 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"); |
| |
| Result : int; |
| |
| begin |
| Result := pthread_mutex_lock_base (mutex); |
| |
| if Result /= 0 then |
| return errno; |
| end if; |
| |
| return 0; |
| end pthread_mutex_lock; |
| |
| -------------------------- |
| -- pthread_mutex_unlock -- |
| -------------------------- |
| |
| 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"); |
| |
| Result : int; |
| |
| begin |
| Result := pthread_mutex_unlock_base (mutex); |
| |
| if Result /= 0 then |
| return errno; |
| end if; |
| |
| return 0; |
| end pthread_mutex_unlock; |
| |
| ----------------------- |
| -- pthread_cond_wait -- |
| ----------------------- |
| |
| -- FSU_THREADS has a nonstandard pthread_cond_wait. |
| -- The FSU_THREADS version returns EINTR when interrupted. |
| |
| 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"); |
| |
| Result : int; |
| |
| begin |
| Result := pthread_cond_wait_base (cond, mutex); |
| |
| if Result = EINTR then |
| return 0; |
| else |
| return Result; |
| end if; |
| end pthread_cond_wait; |
| |
| ---------------------------- |
| -- pthread_cond_timedwait -- |
| ---------------------------- |
| |
| -- FSU_THREADS has a nonstandard pthread_cond_timedwait. The |
| -- FSU_THREADS version returns -1 and set errno to EAGAIN for timeout. |
| |
| 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"); |
| |
| Result : int; |
| |
| begin |
| Result := pthread_cond_timedwait_base (cond, mutex, abstime); |
| |
| if Result = -1 then |
| if errno = EAGAIN then |
| return ETIMEDOUT; |
| else |
| return EINVAL; |
| end if; |
| end if; |
| |
| return 0; |
| end pthread_cond_timedwait; |
| |
| --------------------------- |
| -- pthread_setschedparam -- |
| --------------------------- |
| |
| -- FSU_THREADS does not have pthread_setschedparam |
| |
| -- This routine returns a non-negative value upon failure |
| -- but the error code can not be set conforming the POSIX standard. |
| |
| function pthread_setschedparam |
| (thread : pthread_t; |
| policy : int; |
| param : access struct_sched_param) return int |
| is |
| function pthread_setschedattr |
| (thread : pthread_t; |
| attr : pthread_attr_t) return int; |
| pragma Import (C, pthread_setschedattr, "pthread_setschedattr"); |
| |
| attr : aliased pthread_attr_t; |
| Result : int; |
| |
| begin |
| Result := pthread_attr_init (attr'Access); |
| |
| if Result /= 0 then |
| return Result; |
| end if; |
| |
| attr.sched := policy; |
| |
| -- Short-cut around pthread_attr_setprio |
| |
| attr.prio := param.sched_priority; |
| |
| Result := pthread_setschedattr (thread, attr); |
| |
| if Result /= 0 then |
| return Result; |
| end if; |
| |
| Result := pthread_attr_destroy (attr'Access); |
| |
| if Result /= 0 then |
| return Result; |
| else |
| return 0; |
| end if; |
| end pthread_setschedparam; |
| |
| ------------------------- |
| -- pthread_getspecific -- |
| ------------------------- |
| |
| -- FSU_THREADS has a nonstandard pthread_getspecific |
| |
| 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"); |
| |
| Tmp : aliased System.Address; |
| Result : int; |
| |
| begin |
| Result := pthread_getspecific_base (key, Tmp'Access); |
| |
| if Result /= 0 then |
| return System.Null_Address; |
| end if; |
| |
| return Tmp; |
| end pthread_getspecific; |
| |
| --------------------------------- |
| -- pthread_attr_setdetachstate -- |
| --------------------------------- |
| |
| function pthread_attr_setdetachstate |
| (attr : access pthread_attr_t; |
| detachstate : int) return int |
| is |
| function pthread_attr_setdetachstate_base |
| (attr : access pthread_attr_t; |
| detachstate : access int) return int; |
| pragma Import |
| (C, pthread_attr_setdetachstate_base, "pthread_attr_setdetachstate"); |
| |
| Tmp : aliased int := detachstate; |
| |
| begin |
| return pthread_attr_setdetachstate_base (attr, Tmp'Access); |
| end pthread_attr_setdetachstate; |
| |
| ----------------- |
| -- sched_yield -- |
| ----------------- |
| |
| -- FSU_THREADS does not have sched_yield; |
| |
| function sched_yield return int is |
| procedure sched_yield_base (arg : System.Address); |
| pragma Import (C, sched_yield_base, "pthread_yield"); |
| |
| begin |
| sched_yield_base (System.Null_Address); |
| return 0; |
| end sched_yield; |
| |
| ---------------- |
| -- Stack_Base -- |
| ---------------- |
| |
| function Get_Stack_Base (thread : pthread_t) return Address is |
| begin |
| return thread.stack_base; |
| end Get_Stack_Base; |
| |
| end System.OS_Interface; |
