------------------------------------------------------------------------------ -- -- -- GNAT COMPILER COMPONENTS -- -- -- -- E X P _ D I S P -- -- -- -- S p e c -- -- -- -- Copyright (C) 1992-2005 Free Software Foundation, Inc. -- -- -- -- 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 2, 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. See the GNU General Public License -- -- for more details. You should have received a copy of the GNU General -- -- Public License distributed with GNAT; see file COPYING. If not, write -- -- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, -- -- Boston, MA 02110-1301, USA. -- -- -- -- GNAT was originally developed by the GNAT team at New York University. -- -- Extensive contributions were provided by Ada Core Technologies Inc. -- -- -- ------------------------------------------------------------------------------ -- This package contains routines involved in tagged types and dynamic -- dispatching expansion. with Types; use Types; package Exp_Disp is -- Number of predefined primitive operations added by the Expander -- for a tagged type. If more predefined primitive operations are -- added, the following items must be changed: -- Ada.Tags.Defailt_Prim_Op_Count - indirect use -- Exp_Disp.Default_Prim_Op_Position - indirect use -- Exp_Disp.Set_All_DT_Position - direct use Default_Prim_Op_Count : constant Int := 14; type DT_Access_Action is (CW_Membership, IW_Membership, DT_Entry_Size, DT_Prologue_Size, Get_Access_Level, Get_Entry_Index, Get_External_Tag, Get_Prim_Op_Address, Get_Prim_Op_Kind, Get_RC_Offset, Get_Remotely_Callable, Inherit_DT, Inherit_TSD, Register_Interface_Tag, Register_Tag, Set_Access_Level, Set_Entry_Index, Set_Expanded_Name, Set_External_Tag, Set_Prim_Op_Address, Set_Prim_Op_Kind, Set_RC_Offset, Set_Remotely_Callable, Set_TSD, TSD_Entry_Size, TSD_Prologue_Size); procedure Expand_Dispatching_Call (Call_Node : Node_Id); -- Expand the call to the operation through the dispatch table and perform -- the required tag checks when appropriate. For CPP types the call is -- done through the Vtable (tag checks are not relevant) procedure Expand_Interface_Actuals (Call_Node : Node_Id); -- Ada 2005 (AI-251): Displace all the actuals corresponding to class-wide -- interfaces to reference the interface tag of the actual object procedure Expand_Interface_Conversion (N : Node_Id); -- Ada 2005 (AI-251): N is a type-conversion node. Reference the base of -- the object to give access to the interface tag associated with the -- secondary dispatch table function Expand_Interface_Thunk (N : Node_Id; Thunk_Alias : Node_Id; Thunk_Id : Entity_Id; Thunk_Tag : Entity_Id) return Node_Id; -- Ada 2005 (AI-251): When a tagged type implements abstract interfaces we -- generate additional subprograms (thunks) to have a layout compatible -- with the C++ ABI. The thunk modifies the value of the first actual of -- the call (that is, the pointer to the object) before transferring -- control to the target function. function Fill_DT_Entry (Loc : Source_Ptr; Prim : Entity_Id) return Node_Id; -- Generate the code necessary to fill the appropriate entry of the -- dispatch table of Prim's controlling type with Prim's address. function Fill_Secondary_DT_Entry (Loc : Source_Ptr; Prim : Entity_Id; Thunk_Id : Entity_Id; Iface_DT_Ptr : Entity_Id) return Node_Id; -- (Ada 2005): Generate the code necessary to fill the appropriate entry of -- the secondary dispatch table of Prim's controlling type with Thunk_Id's -- address. function Get_Remotely_Callable (Obj : Node_Id) return Node_Id; -- Return an expression that holds True if the object can be transmitted -- onto another partition according to E.4 (18) function Init_Predefined_Interface_Primitives (Typ : Entity_Id) return List_Id; -- Ada 2005 (AI-251): Initialize the entries associated with predefined -- primitives in all the secondary dispatch tables of Typ. procedure Make_Abstract_Interface_DT (AI_Tag : Entity_Id; Acc_Disp_Tables : in out Elist_Id; Result : out List_Id); -- Ada 2005 (AI-251): Expand the declarations for the secondary Dispatch -- Tables corresponding with an abstract interface. The reference to the -- dispatch table is appended at the end of Acc_Disp_Tables; it will be -- are later used to generate the corresponding initialization statement -- (see Exp_Ch3.Build_Init_Procedure). function Make_DT_Access_Action (Typ : Entity_Id; Action : DT_Access_Action; Args : List_Id) return Node_Id; -- Generate a call to one of the Dispatch Table Access Subprograms defined -- in Ada.Tags or in Interfaces.Cpp function Make_DT (Typ : Entity_Id) return List_Id; -- Expand the declarations for the Dispatch Table (or the Vtable in -- the case of type whose ancestor is a CPP_Class) function Make_Disp_Asynchronous_Select_Body (Typ : Entity_Id) return Node_Id; -- Ada 2005 (AI-345): Generate the body of the primitive operation of type -- Typ used for dispatching in asynchronous selects. function Make_Disp_Asynchronous_Select_Spec (Typ : Entity_Id) return Node_Id; -- Ada 2005 (AI-345): Generate the specification of the primitive operation -- of type Typ used for dispatching in asynchronous selects. function Make_Disp_Conditional_Select_Body (Typ : Entity_Id) return Node_Id; -- Ada 2005 (AI-345): Generate the body of the primitive operation of type -- Typ used for dispatching in conditional selects. function Make_Disp_Conditional_Select_Spec (Typ : Entity_Id) return Node_Id; -- Ada 2005 (AI-345): Generate the specification of the primitive operation -- of type Typ used for dispatching in conditional selects. function Make_Disp_Get_Prim_Op_Kind_Body (Typ : Entity_Id) return Node_Id; -- Ada 2005 (AI-345): Generate the body of the primitive operation of type -- Typ used for retrieving the callable entity kind during dispatching in -- asynchronous selects. function Make_Disp_Get_Prim_Op_Kind_Spec (Typ : Entity_Id) return Node_Id; -- Ada 2005 (AI-345): Generate the specification of the primitive operation -- of the type Typ use for retrieving the callable entity kind during -- dispatching in asynchronous selects. function Make_Disp_Select_Tables (Typ : Entity_Id) return List_Id; -- Ada 2005 (AI-345): Populate the two auxiliary tables in the TSD of Typ -- used for dispatching in asynchronous, conditional and timed selects. -- Generate code to set the primitive operation kinds and entry indices -- of primitive operations and primitive wrappers. function Make_Disp_Timed_Select_Body (Typ : Entity_Id) return Node_Id; -- Ada 2005 (AI-345): Generate the body of the primitive operation of type -- Typ used for dispatching in timed selects. function Make_Disp_Timed_Select_Spec (Typ : Entity_Id) return Node_Id; -- Ada 2005 (AI-345): Generate the specification of the primitive operation -- of type Typ used for dispatching in timed selects. procedure Set_All_DT_Position (Typ : Entity_Id); -- Set the DT_Position field for each primitive operation. In the CPP -- Class case check that no pragma CPP_Virtual is missing and that the -- DT_Position are coherent procedure Set_Default_Constructor (Typ : Entity_Id); -- Typ is a CPP_Class type. Create the Init procedure of that type to -- be the default constructor (i.e. the function returning this type, -- having a pragma CPP_Constructor and no parameter) procedure Write_DT (Typ : Entity_Id); pragma Export (Ada, Write_DT); -- Debugging procedure (to be called within gdb) end Exp_Disp;