New Language: Ada

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@45957 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 102 insertions, 0 deletions

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+------------------------------------------------------------------------------
+--                                                                          --
+--                GNU ADA RUN-TIME LIBRARY (GNARL) COMPONENTS               --
+--                                                                          --
+--                 S Y S T E M . T A S K I N G . Q U E U I N G              --
+--                                                                          --
+--                                  S p e c                                 --
+--                                                                          --
+--                             $Revision: 1.21 $
+--                                                                          --
+--             Copyright (C) 1991-1998 Florida State University             --
+--                                                                          --
+-- 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. It is --
+-- now maintained by Ada Core Technologies Inc. in cooperation with Florida --
+-- State University (http://www.gnat.com).                                  --
+--                                                                          --
+------------------------------------------------------------------------------
+
+with System.Tasking.Protected_Objects.Entries;
+
+package System.Tasking.Queuing is
+
+   package POE renames System.Tasking.Protected_Objects.Entries;
+
+   procedure Broadcast_Program_Error
+     (Self_ID      : Task_ID;
+      Object       : POE.Protection_Entries_Access;
+      Pending_Call : Entry_Call_Link);
+   --  Raise Program_Error in all tasks calling the protected entries
+   --  of Object.  The exception will not be raised immediately for
+   --  the calling task; it will be deferred until it calls
+   --  Raise_Pending_Exception.
+
+   procedure Enqueue (E : in out Entry_Queue; Call : Entry_Call_Link);
+   --  Enqueue Call at the end of entry_queue E
+
+   procedure Dequeue (E : in out Entry_Queue; Call : Entry_Call_Link);
+   --  Dequeue Call from entry_queue E
+
+   function Head (E : in Entry_Queue) return Entry_Call_Link;
+   --  Return the head of entry_queue E
+   pragma Inline (Head);
+
+   procedure Dequeue_Head
+     (E    : in out Entry_Queue;
+      Call : out Entry_Call_Link);
+   --  Remove and return the head of entry_queue E
+
+   function Onqueue (Call : Entry_Call_Link) return Boolean;
+   --  Return True if Call is on any entry_queue at all
+   pragma Inline (Onqueue);
+
+   function Count_Waiting (E : in Entry_Queue) return Natural;
+   --  Return number of calls on the waiting queue of E
+
+   procedure Select_Task_Entry_Call
+     (Acceptor         : Task_ID;
+      Open_Accepts     : Accept_List_Access;
+      Call             : out Entry_Call_Link;
+      Selection        : out Select_Index;
+      Open_Alternative : out Boolean);
+   --  Select an entry for rendezvous.  On exit:
+   --    Call will contain a pointer to the entry call record selected;
+   --    Selection will contain the index of the alternative selected
+   --    Open_Alternative will be True if there were any open alternatives
+
+   procedure Select_Protected_Entry_Call
+     (Self_ID   : Task_ID;
+      Object    : POE.Protection_Entries_Access;
+      Call      : out Entry_Call_Link);
+   --  Select an entry of a protected object
+
+   procedure Enqueue_Call (Entry_Call : Entry_Call_Link);
+   procedure Dequeue_Call (Entry_Call : Entry_Call_Link);
+   --  Enqueue (dequeue) the call to (from) whatever server they are
+   --  calling, whether a task or a protected object.
+
+   procedure Requeue_Call_With_New_Prio
+     (Entry_Call : Entry_Call_Link; Prio : System.Any_Priority);
+   --  Change Priority of the call and re insert to the queue when priority
+   --  queueing is in effect. When FIFO is inforced, this routine
+   --  should not have any effect.
+
+end System.Tasking.Queuing;