gcc/ada/s-stoele.ads

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT COMPILER COMPONENTS                         --
   4 --                                                                          --
   5 --               S Y S T E M . S T O R A G E _ E L E M E N T S              --
   6 --                                                                          --
   7 --                                 S p e c                                  --
   8 --                                                                          --
   9 -- This specification is adapted from the Ada Reference Manual for use with --
  10 -- GNAT.  In accordance with the copyright of that document, you can freely --
  11 -- copy and modify this specification,  provided that if you redistribute a --
  12 -- modified version,  any changes that you have made are clearly indicated. --
  13 --                                                                          --
  14 ------------------------------------------------------------------------------
  15
  16 --  Warning: declarations in this package are ambiguous with respect to the
  17 --  extra declarations that can be introduced into System using Extend_System.
  18 --  It is a good idea to avoid use clauses for this package!
  19
  20 pragma Warnings (Off);
  21 --  This is to stop bootstrap problems with the use of Inline_Always
  22 --  To be removed (along with redundant Inline pragmas) in 3.13.
  23
  24 package System.Storage_Elements is
  25 pragma Pure (Storage_Elements);
  26 --  Note that we take advantage of the implementation permission to make
  27 --  this unit Pure instead of Preelaborable; see RM 13.7.1(15).
  28
  29    type Storage_Offset is range
  30      -(2 ** (Standard."-" (Standard'Address_Size, 1))) ..
  31      +(2 ** (Standard."-" (Standard'Address_Size, 1))) - 1;
  32    --  Note: the reason for the qualification of "-" here by Standard is
  33    --  that we have a current bug in GNAT that otherwise causes a bogus
  34    --  ambiguity when this unit is analyzed in an Rtsfind context.
  35
  36    subtype Storage_Count is Storage_Offset range 0 .. Storage_Offset'Last;
  37
  38    type Storage_Element is mod 2 ** Storage_Unit;
  39    for Storage_Element'Size use Storage_Unit;
  40
  41    type Storage_Array is
  42      array (Storage_Offset range <>) of aliased Storage_Element;
  43    for Storage_Array'Component_Size use Storage_Unit;
  44
  45    --  Address arithmetic
  46
  47    function "+" (Left : Address; Right : Storage_Offset) return Address;
  48    pragma Convention (Intrinsic, "+");
  49    pragma Inline ("+");
  50    pragma Inline_Always ("+");
  51
  52    function "+" (Left : Storage_Offset; Right : Address) return Address;
  53    pragma Convention (Intrinsic, "+");
  54    pragma Inline ("+");
  55    pragma Inline_Always ("+");
  56
  57    function "-" (Left : Address; Right : Storage_Offset) return Address;
  58    pragma Convention (Intrinsic, "-");
  59    pragma Inline ("-");
  60    pragma Inline_Always ("-");
  61
  62    function "-" (Left, Right : Address) return Storage_Offset;
  63    pragma Convention (Intrinsic, "-");
  64    pragma Inline ("-");
  65    pragma Inline_Always ("-");
  66
  67    function "mod"
  68      (Left  : Address;
  69       Right : Storage_Offset)
  70       return  Storage_Offset;
  71    pragma Convention (Intrinsic, "mod");
  72    pragma Inline ("mod");
  73    pragma Inline_Always ("mod");
  74
  75    --  Conversion to/from integers
  76
  77    type Integer_Address is mod Memory_Size;
  78
  79    function To_Address (Value : Integer_Address) return Address;
  80    pragma Convention (Intrinsic, To_Address);
  81    pragma Inline (To_Address);
  82    pragma Inline_Always (To_Address);
  83
  84    function To_Integer (Value : Address) return Integer_Address;
  85    pragma Convention (Intrinsic, To_Integer);
  86    pragma Inline (To_Integer);
  87    pragma Inline_Always (To_Integer);
  88
  89 end System.Storage_Elements;