1------------------------------------------------------------------------------ 2-- -- 3-- GNAT COMPILER COMPONENTS -- 4-- -- 5-- S Y S T E M . P O O L _ S I Z E -- 6-- -- 7-- S p e c -- 8-- -- 9-- Copyright (C) 1992,1993,1994 Free Software Foundation, Inc. -- 10-- -- 11-- GNAT is free software; you can redistribute it and/or modify it under -- 12-- terms of the GNU General Public License as published by the Free Soft- -- 13-- ware Foundation; either version 2, or (at your option) any later ver- -- 14-- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- 15-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- 16-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License -- 17-- for more details. You should have received a copy of the GNU General -- 18-- Public License distributed with GNAT; see file COPYING. If not, write -- 19-- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, -- 20-- MA 02111-1307, USA. -- 21-- -- 22-- As a special exception, if other files instantiate generics from this -- 23-- unit, or you link this unit with other files to produce an executable, -- 24-- this unit does not by itself cause the resulting executable to be -- 25-- covered by the GNU General Public License. This exception does not -- 26-- however invalidate any other reasons why the executable file might be -- 27-- covered by the GNU Public License. -- 28-- -- 29-- GNAT was originally developed by the GNAT team at New York University. -- 30-- Extensive contributions were provided by Ada Core Technologies Inc. -- 31-- -- 32------------------------------------------------------------------------------ 33 34with System.Storage_Pools; 35with System.Storage_Elements; 36 37package System.Pool_Size is 38 39pragma Elaborate_Body; 40-- Needed to ensure that library routines can execute allocators 41 42 ------------------------ 43 -- Stack_Bounded_Pool -- 44 ------------------------ 45 46 -- Allocation strategy: 47 48 -- Pool is a regular stack array, no use of malloc 49 -- user specified size 50 -- Space of pool is globally reclaimed by normal stack management 51 52 -- Used in the compiler for access types with 'STORAGE_SIZE rep. clause 53 -- Only used for allocating objects of the same type. 54 55 type Stack_Bounded_Pool 56 (Pool_Size : System.Storage_Elements.Storage_Count; 57 Elmt_Size : System.Storage_Elements.Storage_Count; 58 Alignment : System.Storage_Elements.Storage_Count) 59 is 60 new System.Storage_Pools.Root_Storage_Pool with record 61 First_Free : System.Storage_Elements.Storage_Count; 62 First_Empty : System.Storage_Elements.Storage_Count; 63 Aligned_Elmt_Size : System.Storage_Elements.Storage_Count; 64 The_Pool : System.Storage_Elements.Storage_Array 65 (1 .. Pool_Size); 66 end record; 67 68 function Storage_Size 69 (Pool : Stack_Bounded_Pool) 70 return System.Storage_Elements.Storage_Count; 71 72 procedure Allocate 73 (Pool : in out Stack_Bounded_Pool; 74 Address : out System.Address; 75 Storage_Size : System.Storage_Elements.Storage_Count; 76 Alignment : System.Storage_Elements.Storage_Count); 77 78 procedure Deallocate 79 (Pool : in out Stack_Bounded_Pool; 80 Address : System.Address; 81 Storage_Size : System.Storage_Elements.Storage_Count; 82 Alignment : System.Storage_Elements.Storage_Count); 83 84 procedure Initialize (Pool : in out Stack_Bounded_Pool); 85 86end System.Pool_Size; 87