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{
This file is part of the Free Pascal run time library.
A file in Amiga system run time library.
Copyright (c) 1998-2003 by Nils Sjoholm
member of the Amiga RTL development team.
See the file COPYING.FPC, included in this distribution,
for details about the copyright.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
**********************************************************************}
unit timerutils;
{
History:
First version of this unit.
06 Sep 2000.
Added the define use_amiga_smartlink.
13 Jan 2003.
nils.sjoholm@mailbox.swipnet.se
}
interface
uses exec, timer, amigalib;
Function CreateTimer(theUnit : longint) : pTimeRequest;
Function SetTimer(WhichTimer : pTimeRequest;
Seconds, Microseconds : longint) : pMsgPort;
Procedure WaitTimer(WhichTimer : pTimeRequest;
Seconds, Microseconds : longint);
Procedure DeleteTimer(WhichTimer : pTimeRequest);
implementation
Function CreateTimer(theUnit : longint) : pTimeRequest;
var
Error : longint;
TimerPort : pMsgPort;
TimeReq : pTimeRequest;
begin
TimerPort := CreatePort(Nil, 0);
if TimerPort = Nil then
CreateTimer := Nil;
TimeReq := pTimeRequest(CreateExtIO(TimerPort,sizeof(tTimeRequest)));
if TimeReq = Nil then begin
DeletePort(TimerPort);
CreateTimer := Nil;
end;
Error := OpenDevice(TIMERNAME, theUnit, pIORequest(TimeReq), 0);
if Error <> 0 then begin
DeleteExtIO(pIORequest(TimeReq));
DeletePort(TimerPort);
CreateTimer := Nil;
end;
TimerBase := pointer(TimeReq^.tr_Node.io_Device);
CreateTimer := pTimeRequest(TimeReq);
end;
Function SetTimer(WhichTimer : pTimeRequest; Seconds, Microseconds : longint) : pMsgPort;
var
TempPort : pMsgPort;
begin
with WhichTimer^ do begin
TempPort := tr_Node.io_Message.mn_ReplyPort;
tr_Node.io_Command := TR_ADDREQUEST; { add a new timer request }
tr_Time.tv_Secs := Seconds; { seconds }
tr_Time.tv_Micro := Microseconds; { microseconds }
SendIO(pIORequest(WhichTimer));
SetTimer := TempPort;
end;
end;
Procedure WaitTimer(WhichTimer : pTimeRequest;
Seconds, Microseconds : longint);
var
Error : Integer;
begin
with WhichTimer^ do begin
tr_Node.io_Command := TR_ADDREQUEST; { add a new timer request }
tr_Time.tv_Secs := Seconds; { seconds }
tr_Time.tv_Micro := Microseconds; { microseconds }
Error := DoIO(pIORequest(WhichTimer));
end;
end;
Procedure DeleteTimer(WhichTimer : pTimeRequest);
var
WhichPort : pMsgPort;
begin
WhichPort := WhichTimer^.tr_Node.io_Message.mn_ReplyPort;
if assigned(WhichTimer) then begin
CloseDevice(pIORequest(WhichTimer));
DeleteExtIO(pIORequest(WhichTimer));
end;
if assigned(WhichPort) then
DeletePort(WhichPort);
end;
end.
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