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Length: 4096 (0x1000)
Types: Ada Source
Notes: 03_class, FILE, R1k_Segment, e3_tag, procedure Tasker, seg_05827b
└─⟦8527c1e9b⟧ Bits:30000544 8mm tape, Rational 1000, Arrival backup of disks in PAM's R1000
└─⟦cfc2e13cd⟧ »Space Info Vol 2«
└─⟦this⟧
-- DEMONSTRATION PROGRAM:
--
-- Producer Consumer Tasking example
--
with Text_Io;
use Text_Io;
procedure Tasker is
------------------------------------------------------------------------
task Buffer is
entry Read (C : out Integer);
entry Write (C : in Integer);
end Buffer;
task body Buffer is
Pool_Size : constant Integer := 3;
Pool : array (Integer range 1 .. Pool_Size) of Integer;
Count : Integer range 0 .. Pool_Size := 0;
In_Index, Out_Index : Integer range 1 .. Pool_Size := 1;
begin
loop
select
when Count < Pool_Size =>
accept Write (C : in Integer) do
Pool (In_Index) := C;
end Write;
In_Index := In_Index mod Pool_Size + 1;
Count := Count + 1;
or
when Count > 0 =>
accept Read (C : out Integer) do
C := Pool (Out_Index);
end Read;
Out_Index := Out_Index mod Pool_Size + 1;
Count := Count - 1;
or
terminate;
end select;
end loop;
end Buffer;
------------------------------------------------------------------------
task Producer;
task body Producer is
begin
for Count in 1 .. 6 loop
Put_Line ("Entry call to write in buffer number: " &
Integer'Image (Count));
Buffer.Write (Count);
Put_Line ("Entry call to write complete.");
end loop;
Buffer.Write (0);
end Producer;
------------------------------------------------------------------------
task Consumer;
task body Consumer is
use Text_Io;
Count : Integer;
begin
loop
Put_Line ("Entry call to read to get number.");
Buffer.Read (Count);
exit when Count = 0;
Put_Line ("Entry call to read obtained number: " &
Integer'Image (Count));
end loop;
end Consumer;
------------------------------------------------------------------------
begin
null;
end Tasker;
pragma Main;
nblk1=3
nid=0
hdr6=6
[0x00] rec0=21 rec1=00 rec2=01 rec3=046
[0x01] rec0=23 rec1=00 rec2=02 rec3=042
[0x02] rec0=0e rec1=00 rec2=03 rec3=000
tail 0x21765870687e27d32f746 0x42a00088462060003