| ------------------------------------------------------------------------------ |
| -- -- |
| -- GNAT COMPILER COMPONENTS -- |
| -- -- |
| -- S Y S T E M . S T O R A G E _ E L E M E N T S -- |
| -- -- |
| -- S p e c -- |
| -- -- |
| -- $Revision: 1.23 $ -- |
| -- -- |
| -- This specification is adapted from the Ada Reference Manual for use with -- |
| -- GNAT. In accordance with the copyright of that document, you can freely -- |
| -- copy and modify this specification, provided that if you redistribute a -- |
| -- modified version, any changes that you have made are clearly indicated. -- |
| -- -- |
| ------------------------------------------------------------------------------ |
| |
| -- Warning: declarations in this package are ambiguous with respect to the |
| -- extra declarations that can be introduced into System using Extend_System. |
| -- It is a good idea to avoid use clauses for this package! |
| |
| pragma Warnings (Off); |
| -- This is to stop bootstrap problems with the use of Inline_Always |
| -- To be removed (along with redundant Inline pragmas) in 3.13. |
| |
| package System.Storage_Elements is |
| pragma Pure (Storage_Elements); |
| -- Note that we take advantage of the implementation permission to make |
| -- this unit Pure instead of Preelaborable; see RM 13.7.1(15). |
| |
| type Storage_Offset is range |
| -(2 ** (Standard."-" (Standard'Address_Size, 1))) .. |
| +(2 ** (Standard."-" (Standard'Address_Size, 1))) - 1; |
| -- Note: the reason for the qualification of "-" here by Standard is |
| -- that we have a current bug in GNAT that otherwise causes a bogus |
| -- ambiguity when this unit is analyzed in an Rtsfind context. |
| |
| subtype Storage_Count is Storage_Offset range 0 .. Storage_Offset'Last; |
| |
| type Storage_Element is mod 2 ** Storage_Unit; |
| for Storage_Element'Size use Storage_Unit; |
| |
| type Storage_Array is |
| array (Storage_Offset range <>) of aliased Storage_Element; |
| for Storage_Array'Component_Size use Storage_Unit; |
| |
| -- Address arithmetic |
| |
| function "+" (Left : Address; Right : Storage_Offset) return Address; |
| pragma Convention (Intrinsic, "+"); |
| pragma Inline ("+"); |
| pragma Inline_Always ("+"); |
| |
| function "+" (Left : Storage_Offset; Right : Address) return Address; |
| pragma Convention (Intrinsic, "+"); |
| pragma Inline ("+"); |
| pragma Inline_Always ("+"); |
| |
| function "-" (Left : Address; Right : Storage_Offset) return Address; |
| pragma Convention (Intrinsic, "-"); |
| pragma Inline ("-"); |
| pragma Inline_Always ("-"); |
| |
| function "-" (Left, Right : Address) return Storage_Offset; |
| pragma Convention (Intrinsic, "-"); |
| pragma Inline ("-"); |
| pragma Inline_Always ("-"); |
| |
| function "mod" |
| (Left : Address; |
| Right : Storage_Offset) |
| return Storage_Offset; |
| pragma Convention (Intrinsic, "mod"); |
| pragma Inline ("mod"); |
| pragma Inline_Always ("mod"); |
| |
| -- Conversion to/from integers |
| |
| type Integer_Address is mod Memory_Size; |
| |
| function To_Address (Value : Integer_Address) return Address; |
| pragma Convention (Intrinsic, To_Address); |
| pragma Inline (To_Address); |
| pragma Inline_Always (To_Address); |
| |
| function To_Integer (Value : Address) return Integer_Address; |
| pragma Convention (Intrinsic, To_Integer); |
| pragma Inline (To_Integer); |
| pragma Inline_Always (To_Integer); |
| |
| end System.Storage_Elements; |