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------------------------------------------------------------------------------
-- --
-- GNAT RUN-TIME COMPONENTS --
-- --
-- S Y S T E M . P A R T I T I O N _ I N T E R F A C E --
-- --
-- S p e c --
-- --
-- Copyright (C) 1995-2022, 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/>. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- --
------------------------------------------------------------------------------
-- This unit may be used directly from an application program by providing
-- an appropriate WITH, and the interface can be expected to remain stable.
with Ada.Exceptions;
with Ada.Streams;
with Interfaces;
with System.RPC;
package System.Partition_Interface is
pragma Elaborate_Body;
type DSA_Implementation_Name is (No_DSA, GARLIC_DSA, PolyORB_DSA);
DSA_Implementation : constant DSA_Implementation_Name := No_DSA;
-- Identification of this DSA implementation variant
PCS_Version : constant := 1;
-- Version of the PCS API (for Exp_Dist consistency check)
--
-- This version number is matched against corresponding element of
-- Exp_Dist.PCS_Version_Number to ensure that the versions of Exp_Dist
-- and the PCS are consistent.
-- RCI receiving stubs contain a table of descriptors for all user
-- subprograms exported by the unit.
type Subprogram_Id is new Natural;
First_RCI_Subprogram_Id : constant := 2;
type RCI_Subp_Info is record
Addr : System.Address;
-- Local address of the proxy object
end record;
type RCI_Subp_Info_Access is access all RCI_Subp_Info;
type RCI_Subp_Info_Array is array (Integer range <>) of
aliased RCI_Subp_Info;
subtype Unit_Name is String;
-- Name of Ada units
type Main_Subprogram_Type is access procedure;
type RACW_Stub_Type is tagged record
Origin : RPC.Partition_ID;
Receiver : Interfaces.Unsigned_64;
Addr : Interfaces.Unsigned_64;
Asynchronous : Boolean;
end record;
type RACW_Stub_Type_Access is access RACW_Stub_Type;
-- This type is used by the expansion to implement distributed objects.
-- Do not change its definition or its layout without updating
-- exp_dist.adb.
type RAS_Proxy_Type is tagged limited record
All_Calls_Remote : Boolean;
Receiver : System.Address;
Subp_Id : Subprogram_Id;
end record;
type RAS_Proxy_Type_Access is access RAS_Proxy_Type;
pragma No_Strict_Aliasing (RAS_Proxy_Type_Access);
-- This type is used by the expansion to implement distributed objects.
-- Do not change its definition or its layout without updating
-- Exp_Dist.Build_Remote_Subprogram_Proxy_Type.
-- The Request_Access type is used for communication between the PCS
-- and the RPC receiver generated by the compiler: it contains all the
-- necessary information for the receiver to process an incoming call.
type RST_Access is access all Ada.Streams.Root_Stream_Type'Class;
type Request_Access is record
Params : RST_Access;
-- A stream describing the called subprogram and its parameters
Result : RST_Access;
-- A stream where the result, raised exception, or out values,
-- are marshalled.
end record;
procedure Check
(Name : Unit_Name;
Version : String;
RCI : Boolean := True);
-- Use by the main subprogram to check that a remote receiver
-- unit has the same version than the caller's one.
function Same_Partition
(Left : not null access RACW_Stub_Type;
Right : not null access RACW_Stub_Type) return Boolean;
-- Determine whether Left and Right correspond to objects instantiated
-- on the same partition, for enforcement of E.4(19).
function Get_Active_Partition_ID (Name : Unit_Name) return RPC.Partition_ID;
-- Similar in some respects to RCI_Locator.Get_Active_Partition_ID
function Get_Active_Version (Name : Unit_Name) return String;
-- Similar in some respects to Get_Active_Partition_ID
function Get_Local_Partition_ID return RPC.Partition_ID;
-- Return the Partition_ID of the current partition
function Get_Passive_Partition_ID
(Name : Unit_Name) return RPC.Partition_ID;
-- Return the Partition_ID of the given shared passive partition
function Get_Passive_Version (Name : Unit_Name) return String;
-- Return the version corresponding to a shared passive unit
function Get_RCI_Package_Receiver
(Name : Unit_Name) return Interfaces.Unsigned_64;
-- Similar in some respects to RCI_Locator.Get_RCI_Package_Receiver
procedure Get_Unique_Remote_Pointer
(Handler : in out RACW_Stub_Type_Access);
-- Get a unique pointer on a remote object
procedure Raise_Program_Error_Unknown_Tag
(E : Ada.Exceptions.Exception_Occurrence);
pragma No_Return (Raise_Program_Error_Unknown_Tag);
-- Raise Program_Error with the same message as E one
type RPC_Receiver is access procedure (R : Request_Access);
procedure Register_Receiving_Stub
(Name : Unit_Name;
Receiver : RPC_Receiver;
Version : String := "";
Subp_Info : System.Address;
Subp_Info_Len : Integer);
-- Register the fact that the Name receiving stub is now elaborated.
-- Register the access value to the package RPC_Receiver procedure.
procedure Get_RAS_Info
(Name : Unit_Name;
Subp_Id : Subprogram_Id;
Proxy_Address : out Interfaces.Unsigned_64);
-- Look up the address of the proxy object for the given subprogram
-- in the named unit, or Null_Address if not present on the local
-- partition.
procedure Register_Passive_Package
(Name : Unit_Name;
Version : String := "");
-- Register a passive package
generic
RCI_Name : String;
Version : String;
package RCI_Locator is
pragma Unreferenced (Version);
function Get_RCI_Package_Receiver return Interfaces.Unsigned_64;
function Get_Active_Partition_ID return RPC.Partition_ID;
end RCI_Locator;
-- RCI package information caching
procedure Run (Main : Main_Subprogram_Type := null);
-- Run the main subprogram
end System.Partition_Interface;
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