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(System.Address,
paTestData_Ptr);
--------------------
-- paTestCallback --
--------------------
function paTestCallback
(inputBuffer : System.Address;
outputBuffer : System.Address;
framesPerBuffer : Interfaces.C.unsigned_long;
timeInfo : access PA_Stream_Callback_Time_Info;
statusFlags : PA_Stream_Callback_Flags;
userData : System.Address)
return PA_Stream_Callback_Result
is
pragma Unreferenced (inputBuffer);
pragma Unreferenced (timeInfo);
pragma Unreferenced (statusFlags);
oBuff : Float_Star := Convert (outputBuffer);
lData : constant paTestData_Ptr := Convert (userData);
begin
for i in 1 .. Integer (framesPerBuffer) loop
declare
output : Float := 0.0;
phaseInc : Long_Float := 0.02;
phase : Long_Float;
begin
for j in 1 .. lData.all.numSines loop
-- Advance phase of next oscillator.
phase := lData.all.phases (j);
phase := phase + phaseInc;
if phase > Two_Pi then
phase := phase - Two_Pi;
end if;
phaseInc := phaseInc * 1.02;
if phaseInc > 0.5 then
phaseInc := phaseInc * 0.5;
end if;
-- This is not a very efficient way to calc sines.
output := output + Sin (Float (phase));
lData.all.phases (j) := phase;
end loop;
oBuff.all := output / Float (lData.all.numSines);
Float_Ptrs.Increment (oBuff);
Function Definition: procedure exercise8 is
Function Body: Count_Failed : exception; -- Exception to be raised when counting fails
Gen : Generator; -- Random number generator
protected type Transaction_Manager (N : Positive) is
entry Finished;
entry Wait_Until_Aborted;
procedure Signal_Abort;
private
Finished_Gate_Open : Boolean := False;
Aborted : Boolean := False;
end Transaction_Manager;
protected body Transaction_Manager is
-- PART 1 --
entry Finished when Finished_Gate_Open or Finished'Count = N is
begin
if Finished'Count = N - 1 then
Finished_Gate_Open := True;
end if;
if Finished'Count = 0 then
Finished_Gate_Open := False;
end if;
end Finished;
-- PART 2 --
entry Wait_Until_Aborted when Aborted is
begin
if Wait_Until_Aborted'Count = 0 then
Aborted := False;
end if;
end Wait_Until_Aborted;
procedure Signal_Abort is
begin
Aborted := True;
end Signal_Abort;
end Transaction_Manager;