| ------------------------------------------------------------------------------ |
| -- -- |
| -- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS -- |
| -- -- |
| -- SYSTEM.TASK_PRIMITIVES.OPERATIONS.SPECIFIC -- |
| -- -- |
| -- B o d y -- |
| -- -- |
| -- Copyright (C) 1992-2021, 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 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. -- |
| -- Extensive contributions were provided by Ada Core Technologies, Inc. -- |
| -- -- |
| ------------------------------------------------------------------------------ |
| |
| -- This is a version for Solaris native threads |
| |
| separate (System.Task_Primitives.Operations) |
| package body Specific is |
| |
| ---------------- |
| -- Initialize -- |
| ---------------- |
| |
| procedure Initialize (Environment_Task : Task_Id) is |
| pragma Unreferenced (Environment_Task); |
| Result : Interfaces.C.int; |
| begin |
| Result := thr_keycreate (ATCB_Key'Access, System.Null_Address); |
| pragma Assert (Result = 0); |
| end Initialize; |
| |
| ------------------- |
| -- Is_Valid_Task -- |
| ------------------- |
| |
| function Is_Valid_Task return Boolean is |
| Unknown_Task : aliased System.Address; |
| Result : Interfaces.C.int; |
| begin |
| Result := thr_getspecific (ATCB_Key, Unknown_Task'Unchecked_Access); |
| pragma Assert (Result = 0); |
| return Unknown_Task /= System.Null_Address; |
| end Is_Valid_Task; |
| |
| --------- |
| -- Set -- |
| --------- |
| |
| procedure Set (Self_Id : Task_Id) is |
| Result : Interfaces.C.int; |
| begin |
| Result := thr_setspecific (ATCB_Key, To_Address (Self_Id)); |
| pragma Assert (Result = 0); |
| end Set; |
| |
| ---------- |
| -- Self -- |
| ---------- |
| |
| -- To make Ada tasks and C threads interoperate better, we have |
| -- added some functionality to Self. Suppose a C main program |
| -- (with threads) calls an Ada procedure and the Ada procedure |
| -- calls the tasking run-time system. Eventually, a call will be |
| -- made to self. Since the call is not coming from an Ada task, |
| -- there will be no corresponding ATCB. |
| |
| -- What we do in Self is to catch references that do not come |
| -- from recognized Ada tasks, and create an ATCB for the calling |
| -- thread. |
| |
| -- The new ATCB will be "detached" from the normal Ada task |
| -- master hierarchy, much like the existing implicitly created |
| -- signal-server tasks. |
| |
| function Self return Task_Id is |
| Result : Interfaces.C.int; |
| Self_Id : aliased System.Address; |
| begin |
| Result := thr_getspecific (ATCB_Key, Self_Id'Unchecked_Access); |
| pragma Assert (Result = 0); |
| |
| if Self_Id = System.Null_Address then |
| return Register_Foreign_Thread; |
| else |
| return To_Task_Id (Self_Id); |
| end if; |
| end Self; |
| |
| end Specific; |
