192 lines
8 KiB
Ada
192 lines
8 KiB
Ada
------------------------------------------------------------------------------
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-- --
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-- GNAT RUN-TIME COMPONENTS --
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-- --
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-- S Y S T E M . P A R T I T I O N _ I N T E R F A C E --
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-- --
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-- S p e c --
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-- --
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-- Copyright (C) 1995-2011, Free Software Foundation, Inc. --
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-- --
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-- GNARL is free software; you can redistribute it and/or modify it under --
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-- terms of the GNU General Public License as published by the Free Soft- --
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-- ware Foundation; either version 3, or (at your option) any later ver- --
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-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE. --
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-- --
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-- As a special exception under Section 7 of GPL version 3, you are granted --
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-- additional permissions described in the GCC Runtime Library Exception, --
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-- version 3.1, as published by the Free Software Foundation. --
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-- --
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-- You should have received a copy of the GNU General Public License and --
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-- a copy of the GCC Runtime Library Exception along with this program; --
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-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
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-- <http://www.gnu.org/licenses/>. --
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-- --
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-- GNAT was originally developed by the GNAT team at New York University. --
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-- Extensive contributions were provided by Ada Core Technologies Inc. --
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-- --
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------------------------------------------------------------------------------
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-- This unit may be used directly from an application program by providing
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-- an appropriate WITH, and the interface can be expected to remain stable.
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with Ada.Exceptions;
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with Ada.Streams;
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with Interfaces;
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with System.RPC;
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package System.Partition_Interface is
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pragma Elaborate_Body;
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type DSA_Implementation_Name is (No_DSA, GARLIC_DSA, PolyORB_DSA);
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DSA_Implementation : constant DSA_Implementation_Name := No_DSA;
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-- Identification of this DSA implementation variant
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PCS_Version : constant := 1;
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-- Version of the PCS API (for Exp_Dist consistency check)
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--
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-- This version number is matched against corresponding element of
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-- Exp_Dist.PCS_Version_Number to ensure that the versions of Exp_Dist
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-- and the PCS are consistent.
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-- RCI receiving stubs contain a table of descriptors for all user
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-- subprograms exported by the unit.
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type Subprogram_Id is new Natural;
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First_RCI_Subprogram_Id : constant := 2;
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type RCI_Subp_Info is record
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Addr : System.Address;
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-- Local address of the proxy object
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end record;
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type RCI_Subp_Info_Access is access all RCI_Subp_Info;
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type RCI_Subp_Info_Array is array (Integer range <>) of
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aliased RCI_Subp_Info;
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subtype Unit_Name is String;
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-- Name of Ada units
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type Main_Subprogram_Type is access procedure;
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type RACW_Stub_Type is tagged record
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Origin : RPC.Partition_ID;
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Receiver : Interfaces.Unsigned_64;
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Addr : Interfaces.Unsigned_64;
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Asynchronous : Boolean;
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end record;
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type RACW_Stub_Type_Access is access RACW_Stub_Type;
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-- This type is used by the expansion to implement distributed objects.
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-- Do not change its definition or its layout without updating
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-- exp_dist.adb.
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type RAS_Proxy_Type is tagged limited record
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All_Calls_Remote : Boolean;
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Receiver : System.Address;
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Subp_Id : Subprogram_Id;
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end record;
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type RAS_Proxy_Type_Access is access RAS_Proxy_Type;
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pragma No_Strict_Aliasing (RAS_Proxy_Type_Access);
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-- This type is used by the expansion to implement distributed objects.
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-- Do not change its definition or its layout without updating
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-- Exp_Dist.Build_Remote_Subprogram_Proxy_Type.
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-- The Request_Access type is used for communication between the PCS
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-- and the RPC receiver generated by the compiler: it contains all the
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-- necessary information for the receiver to process an incoming call.
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type RST_Access is access all Ada.Streams.Root_Stream_Type'Class;
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type Request_Access is record
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Params : RST_Access;
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-- A stream describing the called subprogram and its parameters
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Result : RST_Access;
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-- A stream where the result, raised exception, or out values,
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-- are marshalled.
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end record;
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procedure Check
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(Name : Unit_Name;
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Version : String;
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RCI : Boolean := True);
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-- Use by the main subprogram to check that a remote receiver
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-- unit has the same version than the caller's one.
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function Same_Partition
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(Left : not null access RACW_Stub_Type;
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Right : not null access RACW_Stub_Type) return Boolean;
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-- Determine whether Left and Right correspond to objects instantiated
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-- on the same partition, for enforcement of E.4(19).
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function Get_Active_Partition_ID (Name : Unit_Name) return RPC.Partition_ID;
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-- Similar in some respects to RCI_Locator.Get_Active_Partition_ID
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function Get_Active_Version (Name : Unit_Name) return String;
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-- Similar in some respects to Get_Active_Partition_ID
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function Get_Local_Partition_ID return RPC.Partition_ID;
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-- Return the Partition_ID of the current partition
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function Get_Passive_Partition_ID
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(Name : Unit_Name) return RPC.Partition_ID;
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-- Return the Partition_ID of the given shared passive partition
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function Get_Passive_Version (Name : Unit_Name) return String;
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-- Return the version corresponding to a shared passive unit
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function Get_RCI_Package_Receiver
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(Name : Unit_Name) return Interfaces.Unsigned_64;
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-- Similar in some respects to RCI_Locator.Get_RCI_Package_Receiver
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procedure Get_Unique_Remote_Pointer
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(Handler : in out RACW_Stub_Type_Access);
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-- Get a unique pointer on a remote object
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procedure Raise_Program_Error_Unknown_Tag
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(E : Ada.Exceptions.Exception_Occurrence);
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pragma No_Return (Raise_Program_Error_Unknown_Tag);
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-- Raise Program_Error with the same message as E one
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type RPC_Receiver is access procedure (R : Request_Access);
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procedure Register_Receiving_Stub
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(Name : Unit_Name;
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Receiver : RPC_Receiver;
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Version : String := "";
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Subp_Info : System.Address;
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Subp_Info_Len : Integer);
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-- Register the fact that the Name receiving stub is now elaborated.
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-- Register the access value to the package RPC_Receiver procedure.
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procedure Get_RAS_Info
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(Name : Unit_Name;
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Subp_Id : Subprogram_Id;
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Proxy_Address : out Interfaces.Unsigned_64);
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-- Look up the address of the proxy object for the given subprogram
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-- in the named unit, or Null_Address if not present on the local
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-- partition.
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procedure Register_Passive_Package
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(Name : Unit_Name;
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Version : String := "");
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-- Register a passive package
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generic
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RCI_Name : String;
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Version : String;
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package RCI_Locator is
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pragma Unreferenced (Version);
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function Get_RCI_Package_Receiver return Interfaces.Unsigned_64;
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function Get_Active_Partition_ID return RPC.Partition_ID;
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end RCI_Locator;
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-- RCI package information caching
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procedure Run (Main : Main_Subprogram_Type := null);
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-- Run the main subprogram
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end System.Partition_Interface;
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