DataMuseum.dk Presents historical artifacts from the history of: Rational R1000/400

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⟦86b5474bd⟧ Ada Source

    Length: 3072 (0xc00)
    Types: Ada Source
    Notes: 03_class, FILE, R1k_Segment, e3_tag, package body Fifo, seg_054a05

Derivation

└─⟦8527c1e9b⟧ Bits:30000544 8mm tape, Rational 1000, Arrival backup of disks in PAM's R1000
    └─⟦cfc2e13cd⟧ »Space Info Vol 2« 
        └─⟦this⟧ 

with Text_Io;
package body Fifo is

    function New_Cells (I : Integer) return Acces_Cells is
        Result : Acces_Cells;
    begin
        if Free_Cells = null then
            Result := new Cell;
        else
            Result := Free_Cells;  
            Free_Cells := Free_Cells.Next;
        end if;
        Result.all := Cell'(I, null);
        return Result;
    exception
        when Storage_Error =>
            raise Overflow;
    end New_Cells;

    procedure Old_Cell (Old : in out Acces_Cells) is
    begin
        Old.Next := Free_Cells;
        Free_Cells := Old;
        Old := null;
    end Old_Cell;

    procedure De_Queue (F : in out Object; I : out Integer) is
        Old : Acces_Cells;
    begin
        if F.Head = null then
            raise Underflow;
        end if;
        I := F.Head.Value;
        Old := F.Head;
        if F.Head = null then
            F.Tail := null;
        end if;
        Old_Cell (Old);
    end De_Queue;

    procedure En_Queue is
    begin
        [statement]  
    end En_Queue;
begin
    for I in 1 .. 100 loop
        Free_Cells := new Cell'(0, Free_Cells);
    end loop;
exception
    when Storage_Error =>
        Text_Io.Put_Line ("fatal error in fifo allocation");
end Fifo;

    nblk1=2
    nid=0
    hdr6=4
        [0x00] rec0=27 rec1=00 rec2=01 rec3=022
        [0x01] rec0=0f rec1=00 rec2=02 rec3=000
    tail 0x2175db4f087b8888e5377 0x42a00088462060003