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The Fred Fish Collection 1.5
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Runtime.lzh
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Runtime
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Extras
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TimerUtils.p
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1989-10-21
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84 lines
External;
{
TimerUtils.p
This file declares CreateTimer, WaitTimer, and DeleteTimer.
}
{$I "Include/Ports.i"}
{$I "Include/TimerDevice.i"}
{$I "Include/ExecIOUtils.i"}
{$I "Include/ExecIO.i"}
Function CreateTimer : TimerRequestPtr;
var
Error : Short;
TimerPort : MsgPortPtr;
TimeReq : IOStdReqPtr;
begin
TimerPort := CreatePort(Nil, 0);
if TimerPort = Nil then
CreateTimer := Nil;
TimeReq := CreateStdIO(TimerPort);
if TimeReq = Nil then begin
DeletePort(TimerPort);
CreateTimer := Nil;
end;
Error := OpenDevice(TimerName, UnitVBlank, IORequestPtr(TimeReq), 0);
if Error <> 0 then begin
DeleteStdIO(TimeReq);
DeletePort(TimerPort);
CreateTimer := Nil;
end;
TimerBase := TimeReq^.ioReq.ioDevice;
CreateTimer := TimerRequestPtr(TimeReq);
end;
Function SetTimer(WhichTimer : TimerRequestPtr;
Seconds, Microseconds : Integer) : MsgPortPtr;
var
TempPort : MsgPortPtr;
begin
with WhichTimer^ do begin
TempPort := trNode.ioMessage.mnReplyPort;
trNode.ioCommand := TR_ADDREQUEST; { add a new timer request }
trTime.tvSecs := Seconds; { seconds }
trTime.tvMicro := Microseconds; { microseconds }
SendIO(IORequestPtr(WhichTimer));
SetTimer := TempPort;
end;
end;
Procedure WaitTimer(WhichTimer : TimerRequestPtr;
Seconds, Microseconds : Integer);
var
Error : Short;
begin
with WhichTimer^ do begin
trNode.ioCommand := TR_ADDREQUEST; { add a new timer request }
trTime.tvSecs := Seconds; { seconds }
trTime.tvMicro := Microseconds; { microseconds }
Error := DoIO(IORequestPtr(WhichTimer));
end;
end;
Procedure GetSysTime(WhichTimer : TimerRequestPtr; VAR TV : TimeVal);
var
Error : Short;
begin
WhichTimer^.trNode.ioCommand := TR_GETSYSTIME;
Error := DoIO(IORequestPtr(WhichTimer));
TV := WhichTimer^.trTime;
end;
Procedure DeleteTimer(WhichTimer : TimerRequestPtr);
var
WhichPort : MsgPortPtr;
begin
CloseDevice(IORequestPtr(WhichTimer));
WhichPort := WhichTimer^.trNode.ioMessage.mnReplyPort;
DeleteStdIO(IOStdReqPtr(WhichTimer));
DeletePort(WhichPort);
end;