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DataMuseum.dkPresents historical artifacts from the history of: Rational R1000/400 Tapes |
This is an automatic "excavation" of a thematic subset of
See our Wiki for more about Rational R1000/400 Tapes Excavated with: AutoArchaeologist - Free & Open Source Software. |
top - metrics - downloadIndex: B T
Length: 1723 (0x6bb)
Types: TextFile
Names: »B«
└─⟦149519bd4⟧ Bits:30000546 8mm tape, Rational 1000, !projects 93-07-13
└─⟦124ff5788⟧ »DATA«
└─⟦this⟧
└─⟦a7d1ea751⟧ Bits:30000550 8mm tape, Rational 1000, !users!projects 94_04_11
└─⟦129cab021⟧ »DATA«
└─⟦this⟧
└─⟦f64eaa120⟧ Bits:30000752 8mm tape, Rational 1000, !projects 93 02 16
└─⟦6f12a12be⟧ »DATA«
└─⟦this⟧
└─⟦2f6cfab89⟧ Bits:30000547 8mm tape, Rational 1000, !projects 94-01-04
└─⟦d65440be7⟧ »DATA«
└─⟦this⟧
package body Fifo is
Tab : array (1 .. Size) of Element;
Head, Tail : Positive := 1;
task body Task_Fifo is
begin
loop
select
accept Get (Item : out Element; Result : out Boolean) do
if not Is_Empty then
Get (Item);
Result := True;
else
Result := False;
end if;
end Get;
or
accept Put (Item : in Element; Result : out Boolean) do
if not Is_Full then
Put (Item);
Result := True;
else
Result := False;
end if;
end Put;
or
accept Clear do
Clear;
end Clear;
or
terminate;
end select;
end loop;
end Task_Fifo;
procedure Clear is
begin
Head := 1;
Tail := 1;
end Clear;
function Is_Empty return Boolean is
begin
return Head = Tail;
end Is_Empty;
function Is_Full return Boolean is
begin
return Tail + 1 mod Size = Head;
end Is_Full;
procedure Get (Item : out Element) is
begin
Item := Tab (Head);
if Head = Size then
Head := 1;
else
Head := Head + 1;
end if;
end Get;
procedure Put (Item : in Element) is
begin
Tab (Tail) := Item;
if Tail = Size then
Tail := 1;
else
Tail := Tail + 1;
end if;
end Put;
end Fifo;