Makefile.in, [...]: Move libgnarl sources to libgnarl subdir.

2017-09-08  Nicolas Roche  <roche@adacore.com>

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From-SVN: r251891

1 files changed, 186 insertions, 0 deletions

diff --git a/gcc/ada/libgnarl/g-thread.adb b/gcc/ada/libgnarl/g-thread.adb
new file mode 100644
index 0000000..90d51af
--- /dev/null
+++ b/gcc/ada/libgnarl/g-thread.adb
@@ -0,0 +1,186 @@
+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT RUN-TIME COMPONENTS                         --
+--                                                                          --
+--                         G N A T . T H R E A D S                          --
+--                                                                          --
+--                                 B o d y                                  --
+--                                                                          --
+--                    Copyright (C) 1998-2017, AdaCore                      --
+--                                                                          --
+-- 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/>.                                          --
+--                                                                          --
+-- GNAT was originally developed  by the GNAT team at  New York University. --
+-- Extensive contributions were provided by Ada Core Technologies Inc.      --
+--                                                                          --
+------------------------------------------------------------------------------
+
+with Ada.Task_Identification; use Ada.Task_Identification;
+with System.Task_Primitives.Operations;
+with System.Tasking;
+with System.Tasking.Stages;   use System.Tasking.Stages;
+with System.OS_Interface;     use System.OS_Interface;
+with System.Soft_Links;       use System.Soft_Links;
+with Ada.Unchecked_Conversion;
+
+package body GNAT.Threads is
+
+   use System;
+
+   package STPO renames System.Task_Primitives.Operations;
+
+   type Thread_Id_Ptr is access all Thread_Id;
+
+   pragma Warnings (Off);
+   --  The following unchecked conversions are aliasing safe, since they
+   --  are never used to create pointers to improperly aliased data.
+
+   function To_Addr is new Ada.Unchecked_Conversion (Task_Id, Address);
+   function To_Id   is new Ada.Unchecked_Conversion (Address, Task_Id);
+   function To_Id   is new Ada.Unchecked_Conversion (Address, Tasking.Task_Id);
+   function To_Tid  is new Ada.Unchecked_Conversion
+     (Address, Ada.Task_Identification.Task_Id);
+   function To_Thread is new Ada.Unchecked_Conversion (Address, Thread_Id_Ptr);
+
+   pragma Warnings (On);
+
+   type Code_Proc is access procedure (Id : Address; Parm : Void_Ptr);
+
+   task type Thread
+     (Stsz : Natural;
+      Prio : Any_Priority;
+      Parm : Void_Ptr;
+      Code : Code_Proc)
+   is
+      pragma Priority (Prio);
+      pragma Storage_Size (Stsz);
+   end Thread;
+
+   task body Thread is
+   begin
+      Code.all (To_Addr (Current_Task), Parm);
+   end Thread;
+
+   type Tptr is access Thread;
+
+   -------------------
+   -- Create_Thread --
+   -------------------
+
+   function Create_Thread
+     (Code : Address;
+      Parm : Void_Ptr;
+      Size : Natural;
+      Prio : Integer) return System.Address
+   is
+      TP : Tptr;
+
+      function To_CP is new Ada.Unchecked_Conversion (Address, Code_Proc);
+
+   begin
+      TP := new Thread (Size, Prio, Parm, To_CP (Code));
+      return To_Addr (TP'Identity);
+   end Create_Thread;
+
+   ---------------------
+   -- Register_Thread --
+   ---------------------
+
+   function Register_Thread return System.Address is
+   begin
+      return Task_Primitives.Operations.Register_Foreign_Thread.all'Address;
+   end Register_Thread;
+
+   -----------------------
+   -- Unregister_Thread --
+   -----------------------
+
+   procedure Unregister_Thread is
+      Self_Id : constant Tasking.Task_Id := Task_Primitives.Operations.Self;
+   begin
+      Self_Id.Common.State := Tasking.Terminated;
+      Destroy_TSD (Self_Id.Common.Compiler_Data);
+      Free_Task (Self_Id);
+   end Unregister_Thread;
+
+   --------------------------
+   -- Unregister_Thread_Id --
+   --------------------------
+
+   procedure Unregister_Thread_Id (Thread : System.Address) is
+      Thr : constant Thread_Id := To_Thread (Thread).all;
+      T   : Tasking.Task_Id;
+
+      use type Tasking.Task_Id;
+      --  This use clause should be removed once a visibility problem
+      --  with the MaRTE run time has been fixed. ???
+
+      pragma Warnings (Off);
+      use type System.OS_Interface.Thread_Id;
+      pragma Warnings (On);
+
+   begin
+      STPO.Lock_RTS;
+
+      T := Tasking.All_Tasks_List;
+      loop
+         exit when T = null or else STPO.Get_Thread_Id (T) = Thr;
+
+         T := T.Common.All_Tasks_Link;
+      end loop;
+
+      STPO.Unlock_RTS;
+
+      if T /= null then
+         T.Common.State := Tasking.Terminated;
+         Destroy_TSD (T.Common.Compiler_Data);
+         Free_Task (T);
+      end if;
+   end Unregister_Thread_Id;
+
+   --------------------
+   -- Destroy_Thread --
+   --------------------
+
+   procedure Destroy_Thread (Id : Address) is
+      Tid : constant Task_Id := To_Id (Id);
+   begin
+      Abort_Task (Tid);
+   end Destroy_Thread;
+
+   ----------------
+   -- Get_Thread --
+   ----------------
+
+   procedure Get_Thread (Id : Address; Thread : Address) is
+      Thr : constant Thread_Id_Ptr := To_Thread (Thread);
+   begin
+      Thr.all := Task_Primitives.Operations.Get_Thread_Id (To_Id (Id));
+   end Get_Thread;
+
+   ----------------
+   -- To_Task_Id --
+   ----------------
+
+   function To_Task_Id
+     (Id : System.Address) return Ada.Task_Identification.Task_Id
+   is
+   begin
+      return To_Tid (Id);
+   end To_Task_Id;
+
+end GNAT.Threads;