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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) 1991-2017, Florida State University --
-- Copyright (C) 1995-2022, Free Software Foundation, Inc. --
-- --
-- GNAT 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 3, or (at your option) any later ver- --
-- sion. GNAT 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. --
-- --
-- As a special exception under Section 7 of GPL version 3, you are granted --
-- additional permissions described in the GCC Runtime Library Exception, --
-- version 3.1, as published by the Free Software Foundation. --
-- --
-- You should have received a copy of the GNU General Public License and --
-- a copy of the GCC Runtime Library Exception along with this program; --
-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
-- <http://www.gnu.org/licenses/>. --
-- --
-- GNARL was developed by the GNARL team at Florida State University. It is --
-- now maintained by Ada Core Technologies Inc. in cooperation with Florida --
-- State University (http://www.gnat.com). --
-- --
-- The GNARL files that were developed for RTEMS are maintained by On-Line --
-- Applications Research Corporation (http://www.oarcorp.com) in coopera- --
-- tion with Ada Core Technologies Inc. and Florida State University. --
-- --
------------------------------------------------------------------------------
-- This is the RTEMS version of this package
-- 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
---------------
-- RTEMS API --
---------------
type RTEMS_Attributes is new unsigned;
RTEMS_SIMPLE_BINARY_SEMAPHORE : constant := 16#00000020#;
RTEMS_FIFO : constant := 16#00000000#;
type RTEMS_Interval is new unsigned;
RTEMS_NO_TIMEOUT : constant := 0;
type RTEMS_Options is new unsigned;
RTEMS_WAIT : constant := 16#00000000#;
RTEMS_INTERRUPT_UNIQUE : constant := 16#00000001#;
type RTEMS_Name is new unsigned;
function RTEMS_Build_Name (C1, C2, C3, C4 : Character) return RTEMS_Name
with Import, External_Name => "rtems_build_name", Convention => C;
function RTEMS_Semaphore_Create
(Name : RTEMS_Name;
Count : unsigned;
Attributes : RTEMS_Attributes;
Priority_Ceiling : unsigned;
Semaphore : out Binary_Semaphore_Id) return int
with Import, External_Name => "rtems_semaphore_create", Convention => C;
function RTEMS_Semaphore_Delete (Semaphore : Binary_Semaphore_Id) return int
with Import, External_Name => "rtems_semaphore_delete", Convention => C;
function RTEMS_Semaphore_Flush (Semaphore : Binary_Semaphore_Id)
return int
with Import, External_Name => "rtems_semaphore_flush", Convention => C;
function RTEMS_Semaphore_Obtain
(Semaphore : Binary_Semaphore_Id;
Options : RTEMS_Options;
Timeout : RTEMS_Interval) return int
with Import, External_Name => "rtems_semaphore_obtain", Convention => C;
function RTEMS_Semaphore_Release (Semaphore : Binary_Semaphore_Id)
return int
with Import, External_Name => "rtems_semaphore_release", Convention => 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;
------------------------
-- To_Target_Priority --
------------------------
function To_Target_Priority
(Prio : System.Any_Priority) return Interfaces.C.int
is
begin
return Interfaces.C.int (Prio);
end To_Target_Priority;
-----------------
-- 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 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;
-----------------------------
-- Binary_Semaphore_Create --
-----------------------------
function Binary_Semaphore_Create return Binary_Semaphore_Id is
Semaphore : Binary_Semaphore_Id;
Status : int;
begin
Status :=
RTEMS_Semaphore_Create
(Name => RTEMS_Build_Name ('G', 'N', 'A', 'T'),
Count => 0,
Attributes => RTEMS_SIMPLE_BINARY_SEMAPHORE or RTEMS_FIFO,
Priority_Ceiling => 0,
Semaphore => Semaphore);
pragma Assert (Status = 0);
return Semaphore;
end Binary_Semaphore_Create;
-----------------------------
-- Binary_Semaphore_Delete --
-----------------------------
function Binary_Semaphore_Delete (ID : Binary_Semaphore_Id)
return int is
begin
return RTEMS_Semaphore_Delete (ID);
end Binary_Semaphore_Delete;
-----------------------------
-- Binary_Semaphore_Obtain --
-----------------------------
function Binary_Semaphore_Obtain (ID : Binary_Semaphore_Id)
return int is
begin
return RTEMS_Semaphore_Obtain (ID, RTEMS_WAIT, RTEMS_NO_TIMEOUT);
end Binary_Semaphore_Obtain;
------------------------------
-- Binary_Semaphore_Release --
------------------------------
function Binary_Semaphore_Release (ID : Binary_Semaphore_Id)
return int is
begin
return RTEMS_Semaphore_Release (ID);
end Binary_Semaphore_Release;
----------------------------
-- Binary_Semaphore_Flush --
----------------------------
function Binary_Semaphore_Flush (ID : Binary_Semaphore_Id) return int is
begin
return RTEMS_Semaphore_Flush (ID);
end Binary_Semaphore_Flush;
-----------------------
-- Interrupt_Connect --
-----------------------
function Interrupt_Connect
(Vector : Interrupt_Vector;
Handler : Interrupt_Handler;
Parameter : System.Address := System.Null_Address) return int
is
function RTEMS_Interrupt_Handler_Install
(Vector : Interrupt_Vector;
Info : char_array;
Options : RTEMS_Options;
Handler : Interrupt_Handler;
Parameter : System.Address) return int
with Import,
External_Name => "rtems_interrupt_handler_install",
Convention => C;
Info_String : constant char_array := To_C ("GNAT Interrupt Handler");
-- Handler name that is registered with RTEMS
begin
return
RTEMS_Interrupt_Handler_Install
(Vector => Vector,
Info => Info_String,
Options => RTEMS_INTERRUPT_UNIQUE,
Handler => Handler,
Parameter => Parameter);
end Interrupt_Connect;
--------------------------------
-- Interrupt_Number_To_Vector --
--------------------------------
function Interrupt_Number_To_Vector (intNum : int)
return Interrupt_Vector
is
begin
return Interrupt_Vector (intNum);
end Interrupt_Number_To_Vector;
------------------
-- pthread_init --
------------------
procedure pthread_init is
begin
null;
end pthread_init;
--------------------
-- Get_Stack_Base --
--------------------
function Get_Stack_Base (thread : pthread_t) return Address is
pragma Warnings (Off, thread);
begin
return Null_Address;
end Get_Stack_Base;
-----------------
-- sigaltstack --
-----------------
function sigaltstack
(ss : not null access stack_t;
oss : access stack_t) return int is
pragma Unreferenced (ss);
pragma Unreferenced (oss);
begin
return 0;
end sigaltstack;
-----------------------------------
-- pthread_rwlockattr_setkind_np --
-----------------------------------
function pthread_rwlockattr_setkind_np
(attr : access pthread_rwlockattr_t;
pref : int) return int is
pragma Unreferenced (attr);
pragma Unreferenced (pref);
begin
return 0;
end pthread_rwlockattr_setkind_np;
end System.OS_Interface;
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