+++ /dev/null
-------------------------------------------------------------------------------
--- --
--- 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 --
--- --
--- $Revision: 1.1.16.1 $
--- --
--- Copyright (C) 1999-2000 Free Software Foundation, Inc. --
--- --
--- 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 LynxOS (Native) 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;
-
- -------------------
- -- clock_gettime --
- -------------------
-
- function clock_gettime
- (clock_id : clockid_t;
- tp : access timespec)
- return int
- is
- function clock_gettime_base
- (clock_id : clockid_t;
- tp : access timespec)
- return int;
- pragma Import (C, clock_gettime_base, "clock_gettime");
-
- begin
- if clock_gettime_base (clock_id, tp) /= 0 then
- return errno;
- end if;
-
- return 0;
- end clock_gettime;
-
- -----------------
- -- 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 : 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
- function sigwait_base
- (set : access sigset_t;
- value : System.Address)
- return Signal;
- pragma Import (C, sigwait_base, "sigwait");
-
- begin
- sig.all := sigwait_base (set, Null_Address);
-
- if sig.all = -1 then
- return errno;
- end if;
-
- return 0;
- end sigwait;
-
- --------------------------
- -- POSIX.1c Section 11 --
- --------------------------
-
- -- For all the following functions, LynxOS threads has the POSIX Draft 4
- -- begavior; 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;
- end if;
-
- return 0;
- 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;
- end if;
-
- return 0;
- 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;
- end if;
-
- return 0;
- 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;
- end if;
-
- return 0;
- 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;
- end if;
-
- return 0;
- 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;
- end if;
-
- return 0;
- 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;
- end if;
-
- return 0;
- 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;
- end if;
-
- return 0;
- 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;
- end if;
-
- return 0;
- 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;
- end if;
-
- return 0;
- 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;
- end if;
-
- return 0;
- 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;
- end if;
-
- return 0;
- end pthread_cond_wait;
-
- function pthread_cond_timedwait
- (cond : access pthread_cond_t;
- mutex : access pthread_mutex_t;
- reltime : access timespec) return int
- is
- function pthread_cond_timedwait_base
- (cond : access pthread_cond_t;
- mutex : access pthread_mutex_t;
- reltime : access timespec) return int;
- pragma Import (C, pthread_cond_timedwait_base, "pthread_cond_timedwait");
-
- begin
- if pthread_cond_timedwait_base (cond, mutex, reltime) /= 0 then
- if errno = EAGAIN then
- return ETIMEDOUT;
- end if;
-
- return errno;
- end if;
-
- return 0;
- 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;
- prio : int)
- return int;
- pragma Import (C, pthread_setscheduler, "pthread_setscheduler");
-
- begin
- if pthread_setscheduler (thread, policy, param.sched_priority) = -1 then
- return errno;
- end if;
-
- return 0;
- end pthread_setschedparam;
-
- function pthread_mutexattr_setprotocol
- (attr : access pthread_mutexattr_t;
- protocol : int)
- return int
- is
- begin
- return 0;
- end pthread_mutexattr_setprotocol;
-
- function pthread_mutexattr_setprioceiling
- (attr : access pthread_mutexattr_t;
- prioceiling : int)
- return int
- is
- begin
- return 0;
- end pthread_mutexattr_setprioceiling;
-
- function pthread_attr_setscope
- (attr : access pthread_attr_t;
- contentionscope : int)
- return int
- is
- begin
- return 0;
- end pthread_attr_setscope;
-
- 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_setdetachstate
- (attr : access pthread_attr_t;
- detachstate : int)
- return int
- is
- begin
- return 0;
- end pthread_attr_setdetachstate;
-
- function pthread_create
- (thread : access pthread_t;
- attributes : access pthread_attr_t;
- start_routine : Thread_Body;
- arg : System.Address)
- return int
- is
- -- The LynxOS pthread_create doesn't seems to work.
- -- Workaround : We're using st_new instead.
- --
- -- 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");
-
- St : aliased st_t := attributes.st;
-
- function st_new
- (start_routine : Thread_Body;
- arg : System.Address;
- attributes : access st_t;
- thread : access pthread_t)
- return int;
- pragma Import (C, st_new, "st_new");
-
- begin
- -- Following code would be used if above commented function worked
-
- -- if pthread_create_base
- -- (thread, attributes.all, start_routine, arg) /= 0 then
-
- if st_new (start_routine, arg, St'Access, thread) /= 0 then
- return errno;
- end if;
-
- return 0;
- end pthread_create;
-
- function pthread_detach (thread : pthread_t) return int is
- aliased_thread : aliased pthread_t := thread;
-
- function pthread_detach_base (thread : access pthread_t) return int;
- pragma Import (C, pthread_detach_base, "pthread_detach");
-
- begin
- if pthread_detach_base (aliased_thread'Access) /= 0 then
- return errno;
- end if;
-
- return 0;
- end pthread_detach;
-
- --------------------------
- -- 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;
- end if;
-
- return 0;
- end pthread_setspecific;
-
- function pthread_getspecific (key : pthread_key_t) return System.Address is
- procedure pthread_getspecific_base
- (key : pthread_key_t;
- value : access System.Address);
- pragma Import (C, pthread_getspecific_base, "pthread_getspecific");
-
- value : aliased System.Address := System.Null_Address;
-
- begin
- pthread_getspecific_base (key, value'Unchecked_Access);
- return value;
- end pthread_getspecific;
-
- function Get_Stack_Base (thread : pthread_t) return Address is
- begin
- return Null_Address;
- end Get_Stack_Base;
-
- 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;
- end if;
-
- return 0;
- end pthread_key_create;
-
- procedure pthread_init is
- begin
- null;
- end pthread_init;
-
-end System.OS_Interface;
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