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* generic: add linux 4.1 supportJonas Gorski2015-06-221-0/+18
Boot tested: http://pastebin.com/L6aAb9xj Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com> [jogo: update to 4.1 final add patches added since submission delete patches applied in later rcs restore commit messages in 220-gc-sections and 304-mips_disable_fpu fix 050-backport_netfilter_rtcache to match new API update inlined dma ops with upstream changes add missing config symbols enabled CONFIG_MULTIUSER update kmod defintions for 4.1 ] Signed-off-by: Jonas Gorski <jogo@openwrt.org> SVN-Revision: 46112
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--  Lists data type.
--  Copyright (C) 2002, 2003, 2004, 2005 Tristan Gingold
--
--  This program is free software: you can redistribute it and/or modify
--  it under the terms of the GNU General Public License as published by
--  the Free Software Foundation, either version 2 of the License, or
--  (at your option) any later version.
--
--  This program is distributed in the hope that it will be useful,
--  but WITHOUT 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
--  along with this program.  If not, see <gnu.org/licenses>.
with Types; use Types;

generic
   type El_Type is range <>;
package Lists is
   type List_Type is new Nat32;
   for List_Type'Size use 32;

   Null_List : constant List_Type := 0;
   List_All : constant List_Type := 1;

   subtype List_Valid_Type is List_Type range List_All + 1 .. List_Type'Last;

   -----------
   -- Lists --
   -----------

   -- Iir_Kinds_List
   -- Lists of elements.
   -- index is 0 .. nbr_elements - 1.
   --
   -- Append an element to (the end of) the list.
   --   procedure Append_Element (List: in Iir; Element: Iir);
   --
   -- Get the N th element in list, starting from 0.
   -- Return an access to the element or null_iir, if beyond bounds.
   --   function Get_Nth_Element (List: in Iir; N: Natural) return Iir;
   --
   -- Return the last element of the list, or null_iir.
   --   function Get_Last_Element (List: in Iir) return Iir;
   --
   -- Return the first element of the list, or null_iir.
   --   function Get_First_Element (List: in Iir) return Iir;
   --
   -- Replace an element selected by position.
   --   procedure Replace_Nth_Element (List: in Iir_List; N: Natural; El:Iir);
   --
   -- Add (append) an element only if it was not already present in the list.
   -- Return its position.
   --   procedure Add_Element (List: in Iir; El: Iir; Position: out integer);
   --   procedure Add_Element (List: in Iir_List; El: Iir);
   --
   -- Return the number of elements in the list.
   -- This is also 1 + the position of the last element.
   --   function Get_Nbr_Elements (List: in Iir_List) return Natural;
   --
   -- Set the number of elements in the list.
   -- Can be used only to shrink the list.
   --   procedure Set_Nbr_Elements (List: in Iir_List; N: Natural);

   --  Create a list.
   function Create_List return List_Type;

   --  Destroy a list.
   procedure Destroy_List (List : in out List_Type);

   --  Free all the lists.
   procedure Finalize;

   --  Reset to initial state.
   procedure Initialize;

   --  Append ELEMENT to the list.  It's an O(1) operation.
   procedure Append_Element (List : List_Type; Element : El_Type);

   --  Return the first element of the list.
   function Get_First_Element (List : List_Type) return El_Type;

   --  Append EL if not already in LIST.  It's an O(n) operation.
   procedure Add_Element (List : List_Type; El : El_Type);

   -- Return the number of elements in the list.
   -- This is also 1 + the position of the last element.
   function Get_Nbr_Elements (List: List_Type) return Natural;
   pragma Inline (Get_Nbr_Elements);

   --  True if LIST is empty.
   function Is_Empty (List : List_Type) return Boolean;

   --  Iterator.  The idiomatic way to iterate is:
   --  It := Iterate (List);
   --  while Is_Valid (It) loop
   --     El := Get_Element (It);
   --     ...
   --     Next (It);
   --  end loop;
   type Iterator is private;

   function Iterate (List : List_Valid_Type) return Iterator;
   function Is_Valid (It : Iterator) return Boolean;
   procedure Next (It : in out Iterator);
   function Get_Element (It : Iterator) return El_Type;
   procedure Set_Element (It : Iterator; El : El_Type);

   --  Use the C convention for all these subprograms, so that the Iterator is
   --  always passed by reference.
   pragma Convention (C, Is_Valid);
   pragma Convention (C, Next);
   pragma Convention (C, Get_Element);
   pragma Convention (C, Set_Element);

   --  Like Iterate, but if LIST is Null_List, it returns an iterator that is
   --  never valid.
   function Iterate_Safe (List : List_Type) return Iterator;

private
   type Chunk_Index_Type is new Int32;
   for Chunk_Index_Type'Size use 32;
   No_Chunk_Index : constant Chunk_Index_Type := 0;

   Chunk_Len : constant := 7;

   type Node_Type_Array is
     array (Nat32 range 0 .. Chunk_Len - 1) of El_Type;

   type Chunk_Type is record
      Next : Chunk_Index_Type;
      Els : Node_Type_Array;
   end record;

   type Iterator is record
      Chunk : Chunk_Index_Type;
      Chunk_Idx : Nat32;
      Remain : Nat32;
   end record;
   pragma Convention (C, Iterator);

   pragma Inline (Iterate);
   pragma Inline (Is_Valid);
   pragma Inline (Next);
   pragma Inline (Get_Element);
end Lists;