531 lines
16 KiB
Ada
531 lines
16 KiB
Ada
------------------------------------------------------------------------------
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-- --
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-- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS --
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-- --
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-- S Y S T E M . O S _ I N T E R F A C E --
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-- --
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-- B o d y --
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-- --
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-- Copyright (C) 1991-1994, Florida State University --
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-- Copyright (C) 1995-2005, AdaCore --
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-- --
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-- GNARL is free software; you can redistribute it and/or modify it under --
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-- terms of the GNU General Public License as published by the Free Soft- --
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-- ware Foundation; either version 2, or (at your option) any later ver- --
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-- sion. GNARL is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
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-- for more details. You should have received a copy of the GNU General --
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-- Public License distributed with GNARL; see file COPYING. If not, write --
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-- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
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-- Boston, MA 02110-1301, USA. --
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-- --
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-- As a special exception, if other files instantiate generics from this --
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-- unit, or you link this unit with other files to produce an executable, --
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-- this unit does not by itself cause the resulting executable to be --
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-- covered by the GNU General Public License. This exception does not --
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-- however invalidate any other reasons why the executable file might be --
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-- covered by the GNU Public License. --
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-- --
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-- GNARL was developed by the GNARL team at Florida State University. --
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-- Extensive contributions were provided by Ada Core Technologies, Inc. --
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-- --
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------------------------------------------------------------------------------
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-- This is a DCE version of this package.
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-- Currently HP-UX and SNI use this file
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pragma Polling (Off);
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-- Turn off polling, we do not want ATC polling to take place during
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-- tasking operations. It causes infinite loops and other problems.
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-- This package encapsulates all direct interfaces to OS services
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-- that are needed by children of System.
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with Interfaces.C; use Interfaces.C;
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package body System.OS_Interface is
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-----------------
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-- To_Duration --
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-----------------
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function To_Duration (TS : timespec) return Duration is
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begin
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return Duration (TS.tv_sec) + Duration (TS.tv_nsec) / 10#1#E9;
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end To_Duration;
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-----------------
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-- To_Timespec --
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-----------------
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function To_Timespec (D : Duration) return timespec is
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S : time_t;
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F : Duration;
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begin
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S := time_t (Long_Long_Integer (D));
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F := D - Duration (S);
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-- If F has negative value due to a round-up, adjust for positive F
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-- value.
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if F < 0.0 then
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S := S - 1;
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F := F + 1.0;
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end if;
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return timespec'(tv_sec => S,
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tv_nsec => long (Long_Long_Integer (F * 10#1#E9)));
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end To_Timespec;
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function To_Duration (TV : struct_timeval) return Duration is
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begin
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return Duration (TV.tv_sec) + Duration (TV.tv_usec) / 10#1#E6;
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end To_Duration;
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function To_Timeval (D : Duration) return struct_timeval is
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S : time_t;
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F : Duration;
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begin
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S := time_t (Long_Long_Integer (D));
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F := D - Duration (S);
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-- If F has negative value due to a round-up, adjust for positive F
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-- value.
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if F < 0.0 then
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S := S - 1;
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F := F + 1.0;
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end if;
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return
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struct_timeval'
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(tv_sec => S,
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tv_usec => time_t (Long_Long_Integer (F * 10#1#E6)));
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end To_Timeval;
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-------------------------
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-- POSIX.1c Section 3 --
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-------------------------
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function sigwait
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(set : access sigset_t;
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sig : access Signal) return int
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is
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Result : int;
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begin
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Result := sigwait (set);
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if Result = -1 then
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sig.all := 0;
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return errno;
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end if;
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sig.all := Signal (Result);
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return 0;
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end sigwait;
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-- DCE_THREADS does not have pthread_kill. Instead, we just ignore it.
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function pthread_kill (thread : pthread_t; sig : Signal) return int is
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pragma Unreferenced (thread, sig);
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begin
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return 0;
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end pthread_kill;
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--------------------------
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-- POSIX.1c Section 11 --
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--------------------------
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-- For all following functions, DCE Threads has a non standard behavior.
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-- It sets errno but the standard Posix requires it to be returned.
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function pthread_mutexattr_init
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(attr : access pthread_mutexattr_t) return int
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is
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function pthread_mutexattr_create
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(attr : access pthread_mutexattr_t) return int;
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pragma Import (C, pthread_mutexattr_create, "pthread_mutexattr_create");
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begin
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if pthread_mutexattr_create (attr) /= 0 then
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return errno;
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else
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return 0;
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end if;
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end pthread_mutexattr_init;
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function pthread_mutexattr_destroy
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(attr : access pthread_mutexattr_t) return int
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is
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function pthread_mutexattr_delete
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(attr : access pthread_mutexattr_t) return int;
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pragma Import (C, pthread_mutexattr_delete, "pthread_mutexattr_delete");
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begin
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if pthread_mutexattr_delete (attr) /= 0 then
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return errno;
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else
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return 0;
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end if;
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end pthread_mutexattr_destroy;
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function pthread_mutex_init
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(mutex : access pthread_mutex_t;
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attr : access pthread_mutexattr_t) return int
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is
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function pthread_mutex_init_base
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(mutex : access pthread_mutex_t;
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attr : pthread_mutexattr_t) return int;
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pragma Import (C, pthread_mutex_init_base, "pthread_mutex_init");
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begin
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if pthread_mutex_init_base (mutex, attr.all) /= 0 then
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return errno;
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else
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return 0;
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end if;
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end pthread_mutex_init;
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function pthread_mutex_destroy
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(mutex : access pthread_mutex_t) return int
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is
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function pthread_mutex_destroy_base
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(mutex : access pthread_mutex_t) return int;
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pragma Import (C, pthread_mutex_destroy_base, "pthread_mutex_destroy");
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begin
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if pthread_mutex_destroy_base (mutex) /= 0 then
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return errno;
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else
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return 0;
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end if;
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end pthread_mutex_destroy;
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function pthread_mutex_lock
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(mutex : access pthread_mutex_t) return int
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is
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function pthread_mutex_lock_base
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(mutex : access pthread_mutex_t) return int;
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pragma Import (C, pthread_mutex_lock_base, "pthread_mutex_lock");
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begin
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if pthread_mutex_lock_base (mutex) /= 0 then
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return errno;
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else
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return 0;
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end if;
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end pthread_mutex_lock;
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function pthread_mutex_unlock
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(mutex : access pthread_mutex_t) return int
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is
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function pthread_mutex_unlock_base
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(mutex : access pthread_mutex_t) return int;
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pragma Import (C, pthread_mutex_unlock_base, "pthread_mutex_unlock");
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begin
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if pthread_mutex_unlock_base (mutex) /= 0 then
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return errno;
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else
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return 0;
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end if;
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end pthread_mutex_unlock;
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function pthread_condattr_init
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(attr : access pthread_condattr_t) return int
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is
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function pthread_condattr_create
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(attr : access pthread_condattr_t) return int;
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pragma Import (C, pthread_condattr_create, "pthread_condattr_create");
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begin
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if pthread_condattr_create (attr) /= 0 then
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return errno;
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else
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return 0;
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end if;
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end pthread_condattr_init;
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function pthread_condattr_destroy
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(attr : access pthread_condattr_t) return int
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is
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function pthread_condattr_delete
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(attr : access pthread_condattr_t) return int;
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pragma Import (C, pthread_condattr_delete, "pthread_condattr_delete");
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begin
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if pthread_condattr_delete (attr) /= 0 then
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return errno;
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else
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return 0;
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end if;
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end pthread_condattr_destroy;
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function pthread_cond_init
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(cond : access pthread_cond_t;
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attr : access pthread_condattr_t) return int
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is
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function pthread_cond_init_base
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(cond : access pthread_cond_t;
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attr : pthread_condattr_t) return int;
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pragma Import (C, pthread_cond_init_base, "pthread_cond_init");
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begin
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if pthread_cond_init_base (cond, attr.all) /= 0 then
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return errno;
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else
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return 0;
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end if;
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end pthread_cond_init;
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function pthread_cond_destroy
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(cond : access pthread_cond_t) return int
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is
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function pthread_cond_destroy_base
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(cond : access pthread_cond_t) return int;
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pragma Import (C, pthread_cond_destroy_base, "pthread_cond_destroy");
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begin
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if pthread_cond_destroy_base (cond) /= 0 then
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return errno;
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else
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return 0;
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end if;
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end pthread_cond_destroy;
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function pthread_cond_signal
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(cond : access pthread_cond_t) return int
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is
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function pthread_cond_signal_base
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(cond : access pthread_cond_t) return int;
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pragma Import (C, pthread_cond_signal_base, "pthread_cond_signal");
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begin
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if pthread_cond_signal_base (cond) /= 0 then
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return errno;
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else
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return 0;
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end if;
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end pthread_cond_signal;
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function pthread_cond_wait
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(cond : access pthread_cond_t;
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mutex : access pthread_mutex_t) return int
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is
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function pthread_cond_wait_base
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(cond : access pthread_cond_t;
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mutex : access pthread_mutex_t) return int;
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pragma Import (C, pthread_cond_wait_base, "pthread_cond_wait");
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begin
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if pthread_cond_wait_base (cond, mutex) /= 0 then
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return errno;
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else
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return 0;
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end if;
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end pthread_cond_wait;
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function pthread_cond_timedwait
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(cond : access pthread_cond_t;
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mutex : access pthread_mutex_t;
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abstime : access timespec) return int
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is
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function pthread_cond_timedwait_base
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(cond : access pthread_cond_t;
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mutex : access pthread_mutex_t;
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abstime : access timespec) return int;
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pragma Import (C, pthread_cond_timedwait_base, "pthread_cond_timedwait");
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begin
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if pthread_cond_timedwait_base (cond, mutex, abstime) /= 0 then
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if errno = EAGAIN then
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return ETIMEDOUT;
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else
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return errno;
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end if;
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else
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return 0;
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end if;
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end pthread_cond_timedwait;
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----------------------------
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-- POSIX.1c Section 13 --
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----------------------------
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function pthread_setschedparam
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(thread : pthread_t;
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policy : int;
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param : access struct_sched_param) return int
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is
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function pthread_setscheduler
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(thread : pthread_t;
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policy : int;
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priority : int) return int;
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pragma Import (C, pthread_setscheduler, "pthread_setscheduler");
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begin
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if pthread_setscheduler (thread, policy, param.sched_priority) = -1 then
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return errno;
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else
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return 0;
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end if;
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end pthread_setschedparam;
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function sched_yield return int is
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procedure pthread_yield;
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pragma Import (C, pthread_yield, "pthread_yield");
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begin
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pthread_yield;
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return 0;
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end sched_yield;
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-----------------------------
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-- P1003.1c - Section 16 --
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-----------------------------
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function pthread_attr_init
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(attributes : access pthread_attr_t) return int
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is
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function pthread_attr_create
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(attributes : access pthread_attr_t) return int;
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pragma Import (C, pthread_attr_create, "pthread_attr_create");
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begin
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if pthread_attr_create (attributes) /= 0 then
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return errno;
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else
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return 0;
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end if;
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end pthread_attr_init;
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function pthread_attr_destroy
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(attributes : access pthread_attr_t) return int
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is
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function pthread_attr_delete
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(attributes : access pthread_attr_t) return int;
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pragma Import (C, pthread_attr_delete, "pthread_attr_delete");
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begin
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if pthread_attr_delete (attributes) /= 0 then
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return errno;
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else
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return 0;
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end if;
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end pthread_attr_destroy;
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function pthread_attr_setstacksize
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(attr : access pthread_attr_t;
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stacksize : size_t) return int
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is
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function pthread_attr_setstacksize_base
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(attr : access pthread_attr_t;
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stacksize : size_t) return int;
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pragma Import (C, pthread_attr_setstacksize_base,
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"pthread_attr_setstacksize");
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begin
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if pthread_attr_setstacksize_base (attr, stacksize) /= 0 then
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return errno;
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else
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return 0;
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end if;
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end pthread_attr_setstacksize;
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function pthread_create
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(thread : access pthread_t;
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attributes : access pthread_attr_t;
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start_routine : Thread_Body;
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arg : System.Address) return int
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is
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function pthread_create_base
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(thread : access pthread_t;
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attributes : pthread_attr_t;
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start_routine : Thread_Body;
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arg : System.Address) return int;
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pragma Import (C, pthread_create_base, "pthread_create");
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begin
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if pthread_create_base
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(thread, attributes.all, start_routine, arg) /= 0
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then
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return errno;
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else
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return 0;
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end if;
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end pthread_create;
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|
|
--------------------------
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-- POSIX.1c Section 17 --
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--------------------------
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function pthread_setspecific
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(key : pthread_key_t;
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value : System.Address) return int
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is
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function pthread_setspecific_base
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(key : pthread_key_t;
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value : System.Address) return int;
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pragma Import (C, pthread_setspecific_base, "pthread_setspecific");
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begin
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if pthread_setspecific_base (key, value) /= 0 then
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return errno;
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else
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return 0;
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end if;
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end pthread_setspecific;
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|
|
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function pthread_getspecific (key : pthread_key_t) return System.Address is
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function pthread_getspecific_base
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(key : pthread_key_t;
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value : access System.Address) return int;
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pragma Import (C, pthread_getspecific_base, "pthread_getspecific");
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Addr : aliased System.Address;
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begin
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if pthread_getspecific_base (key, Addr'Access) /= 0 then
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return System.Null_Address;
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else
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return Addr;
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end if;
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end pthread_getspecific;
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|
|
|
function pthread_key_create
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|
(key : access pthread_key_t;
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|
destructor : destructor_pointer) return int
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|
is
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|
function pthread_keycreate
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|
(key : access pthread_key_t;
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|
destructor : destructor_pointer) return int;
|
|
pragma Import (C, pthread_keycreate, "pthread_keycreate");
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|
begin
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if pthread_keycreate (key, destructor) /= 0 then
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return errno;
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|
else
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|
return 0;
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|
end if;
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|
end pthread_key_create;
|
|
|
|
function Get_Stack_Base (thread : pthread_t) return Address is
|
|
pragma Warnings (Off, thread);
|
|
begin
|
|
return Null_Address;
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|
end Get_Stack_Base;
|
|
|
|
procedure pthread_init is
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|
begin
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null;
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|
end pthread_init;
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|
|
|
function intr_attach (sig : int; handler : isr_address) return long is
|
|
function c_signal (sig : int; handler : isr_address) return long;
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|
pragma Import (C, c_signal, "signal");
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|
begin
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return c_signal (sig, handler);
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|
end intr_attach;
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|
end System.OS_Interface;
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