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ada-git-code

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end One_A_Time;
task Reader1;
task Reader2;
task body Reader1 is
I : Integer := One_A_Time.Read ("R1");
begin
loop
exit when I = 0;
I := One_A_Time.Read ("R1");
delay 0.5;
end loop;
end Reader1;
task body Reader2 is
I : Integer := One_A_Time.Read ("R2");
begin
loop
exit when I = 0;
I := One_A_Time.Read ("R2");
delay 0.5;
end loop;
end Reader2;
T : Time := Clock;
begin
-- The main writes
Put_Time_Diff (T); Put_Line (" ET writes 1...");
One_A_Time.Write (1);
Put_Time_Diff (T); Put_Line (" ET has written 1");
delay 5.0;
Put_Time_Diff (T); Put_Line (" ET writes 0...");
One_A_Time.Write (0);
Put_Time_Diff (T); Put_Line (" ET has written 0");
Function Definition: procedure Protect is
Function Body: procedure Put_Time_Diff (D : in Time) is
T : Duration := Clock - D;
begin
Put (Duration'Image (T));
end Put_Time_Diff;
protected One_A_Time is
function Read return Integer;
-- Reading takes 3s
procedure Write (X : Integer);
-- Writing takes 5s
private
V : Integer := 0;
T : Time := Clock;
end One_A_Time;
protected body One_A_Time is
function Read return Integer is
begin
Put_Time_Diff (T); Put_Line (" OAT starts reading...");
delay 3.0;
Put_Time_Diff (T); Put_Line (" OAT ended read");
return V;
end Read;
procedure Write (X : Integer) is
begin
Put_Time_Diff (T); Put_Line (" OAT starts writing...");
delay 5.0;
V := X;
Put_Time_Diff (T); Put_Line (" OAT ended writing...");
end Write;
end One_A_Time;
task Reader1;
task Reader2;
task body Reader1 is
I : Integer;
T : Time := Clock;
begin
Put_Time_Diff (T);
Put_Line (" R1 reading...");
I := One_A_Time.Read;
Put_Time_Diff (T);
Put_Line (" ...R1 read" & Integer'Image (I));
delay 5.0;
-- try to read with R2
I := One_A_Time.Read;
Put_Time_Diff (T); Put_Line ("*** R1 exit ***");
end Reader1;
task body Reader2 is
I : Integer;
T : Time := Clock;
begin