| ------------------------------------------------------------------------------ |
| -- -- |
| -- GNAT COMPILER COMPONENTS -- |
| -- -- |
| -- S Y S T E M . S T O R A G E _ P O O L S -- |
| -- -- |
| -- S p e c -- |
| -- -- |
| -- Copyright (C) 1992-2021, Free Software Foundation, Inc. -- |
| -- -- |
| -- This specification is derived from the Ada Reference Manual for use with -- |
| -- GNAT. The copyright notice above, and the license provisions that follow -- |
| -- apply solely to the contents of the part following the private keyword. -- |
| -- -- |
| -- 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.Finalization; |
| with System.Storage_Elements; |
| |
| package System.Storage_Pools |
| with Pure |
| is |
| type Root_Storage_Pool is abstract |
| new Ada.Finalization.Limited_Controlled with private; |
| pragma Preelaborable_Initialization (Root_Storage_Pool); |
| |
| procedure Allocate |
| (Pool : in out Root_Storage_Pool; |
| Storage_Address : out System.Address; |
| Size_In_Storage_Elements : System.Storage_Elements.Storage_Count; |
| Alignment : System.Storage_Elements.Storage_Count) |
| is abstract; |
| |
| procedure Deallocate |
| (Pool : in out Root_Storage_Pool; |
| Storage_Address : System.Address; |
| Size_In_Storage_Elements : System.Storage_Elements.Storage_Count; |
| Alignment : System.Storage_Elements.Storage_Count) |
| is abstract; |
| |
| function Storage_Size |
| (Pool : Root_Storage_Pool) |
| return System.Storage_Elements.Storage_Count |
| is abstract; |
| |
| private |
| type Root_Storage_Pool is abstract |
| new Ada.Finalization.Limited_Controlled with null record; |
| |
| type Root_Storage_Pool_Ptr is access all Root_Storage_Pool'Class; |
| for Root_Storage_Pool_Ptr'Storage_Size use 0; |
| -- Type of the BIP_Storage_Pool extra parameter (see Exp_Ch6). The |
| -- Storage_Size clause is necessary, because otherwise we have a |
| -- chicken&egg problem; we can't be creating collection finalization code |
| -- in this low-level package, because that involves Pool_Global, which |
| -- imports this package. |
| |
| -- ??? Are these two still needed? It might be possible to use Subpools. |
| -- Allocate_Any_Controlled / Deallocate_Any_Controlled for non-controlled |
| -- objects. |
| |
| -- The following two procedures support the use of class-wide pool |
| -- objects in storage pools. When a local type is given a class-wide |
| -- storage pool, allocation and deallocation for the type must dispatch |
| -- to the operation of the specific pool, which is achieved by a call |
| -- to these procedures. (When the pool type is specific, the back-end |
| -- generates a call to the statically identified operation of the type). |
| |
| procedure Allocate_Any |
| (Pool : in out Root_Storage_Pool'Class; |
| Storage_Address : out System.Address; |
| Size_In_Storage_Elements : System.Storage_Elements.Storage_Count; |
| Alignment : System.Storage_Elements.Storage_Count); |
| |
| procedure Deallocate_Any |
| (Pool : in out Root_Storage_Pool'Class; |
| Storage_Address : System.Address; |
| Size_In_Storage_Elements : System.Storage_Elements.Storage_Count; |
| Alignment : System.Storage_Elements.Storage_Count); |
| |
| end System.Storage_Pools; |
