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Diffstat (limited to 'gcc/ada/s-osinte-fsu.adb')
| -rw-r--r-- | gcc/ada/s-osinte-fsu.adb | 366 |
1 files changed, 366 insertions, 0 deletions
diff --git a/gcc/ada/s-osinte-fsu.adb b/gcc/ada/s-osinte-fsu.adb new file mode 100644 index 00000000000..b646a789b50 --- /dev/null +++ b/gcc/ada/s-osinte-fsu.adb @@ -0,0 +1,366 @@ +------------------------------------------------------------------------------ +-- -- +-- 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; |