1------------------------------------------------------------------------------ 2-- -- 3-- GNAT COMPILER COMPONENTS -- 4-- -- 5-- S Y S T E M . T H R E A D S -- 6-- -- 7-- S p e c -- 8-- -- 9-- Copyright (C) 1992-2018, Free Software Foundation, Inc. -- 10-- -- 11-- GNAT is free software; you can redistribute it and/or modify it under -- 12-- terms of the GNU General Public License as published by the Free Soft- -- 13-- ware Foundation; either version 3, or (at your option) any later ver- -- 14-- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- 15-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- 16-- or FITNESS FOR A PARTICULAR PURPOSE. -- 17-- -- 18-- As a special exception under Section 7 of GPL version 3, you are granted -- 19-- additional permissions described in the GCC Runtime Library Exception, -- 20-- version 3.1, as published by the Free Software Foundation. -- 21-- -- 22-- You should have received a copy of the GNU General Public License and -- 23-- a copy of the GCC Runtime Library Exception along with this program; -- 24-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -- 25-- <http://www.gnu.org/licenses/>. -- 26-- -- 27-- GNAT was originally developed by the GNAT team at New York University. -- 28-- Extensive contributions were provided by Ada Core Technologies Inc. -- 29-- -- 30------------------------------------------------------------------------------ 31 32-- This package provides facilities to register a thread to the runtime, 33-- and allocate its task specific datas. 34 35-- This package is currently implemented for: 36 37-- VxWorks AE653 rts-cert 38-- VxWorks AE653 rts-full (not rts-kernel) 39 40with Ada.Exceptions; 41with Ada.Unchecked_Conversion; 42 43with Interfaces.C; 44 45with System.Secondary_Stack; 46with System.Soft_Links; 47 48package System.Threads is 49 50 package SST renames System.Secondary_Stack; 51 52 type ATSD is limited private; 53 -- Type of the Ada thread specific data. It contains datas needed 54 -- by the GNAT runtime. 55 56 type ATSD_Access is access ATSD; 57 function From_Address is 58 new Ada.Unchecked_Conversion (Address, ATSD_Access); 59 60 subtype STATUS is Interfaces.C.int; 61 -- Equivalent of the C type STATUS 62 63 type t_id is new Interfaces.C.long; 64 subtype Thread_Id is t_id; 65 66 function Register (T : Thread_Id) return STATUS; 67 -- Create the task specific data necessary for Ada language support 68 69 -------------------------- 70 -- Thread Body Handling -- 71 -------------------------- 72 73 -- The subprograms in this section are called from the process body 74 -- wrapper in the APEX process registration package. 75 76 procedure Thread_Body_Enter 77 (Sec_Stack_Ptr : SST.SS_Stack_Ptr; 78 Process_ATSD_Address : System.Address); 79 -- Enter thread body, see above for details 80 81 procedure Thread_Body_Leave; 82 -- Leave thread body (normally), see above for details 83 84 procedure Thread_Body_Exceptional_Exit 85 (EO : Ada.Exceptions.Exception_Occurrence); 86 -- Leave thread body (abnormally on exception), see above for details 87 88private 89 90 type ATSD is new System.Soft_Links.TSD; 91 92end System.Threads; 93