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+------------------------------------------------------------------------------
+-- --
+-- 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 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 the 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;
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