User::WaitForRequest with Timeout — Symbian C++ — All About Symbian Forum Archive

SirGraham 02 Oct 2003, 08:59

Hi all,

I have a problem, I like use the RSocket class but without use the CActive class for the asynchronous service.

The problem is in the RSocket::Read member if I use the User::WaitForResquest is blocking. I like read only if I have got data to read or have a Timeout.

I try to make this:

btsocket->Read(data,status);

int timeout = 1000;
RTimer timer;
TRequestStatus timerstatus;
int nsteps = 2;
int step = ((timeout*1000)/nsteps);

timer.CreateLocal();

timer.After(timerstatus,step);

for(;😉
{
User::WaitForAnyRequest();
if(timerstatus!=KRequestPending)
{
nsteps--;
if(!nsteps) break;
timer.After(timerstatus,step);
}

if(status!=KRequestPending) break;
}

if(timerstatus==KRequestPending) User::WaitForRequest(timerstatus);

timer.Close();

The problem is the Socket operation are pendient and I can�t eliminate. If I make:

static void RequestComplete(TRequestStatus*& aStatus,TInt aReason);

but... Don�t work. It makes error.

other possible solutions is try to use before that read:

err=btsocket->GetOpt(KSockSelectRead,KSOLSocket,bfr);

To know if there is data to read, but this don�t actualize the data (always have the same return).

Anyboy Can help me?
Any idea to resolve this...?

Best regards,
Sir Graham.

cmatthee 02 Oct 2003, 11:28

Use the Cancel functions of the RTimer and RSocket classes. When the timer completes first, you call the correct Cancel function from the RSocket class. When the socket completes, you call RTimer::Cancel();

SirGraham 02 Oct 2003, 11:39

Hi cmatthee,

Thanks for you answer, but This not Work. It makes a error: E32USER-CBase 46

"This panic is raised by an active scheduler, a CActiveScheduler. It is caused by a stray signal."

I dont�t understand because, I don�t use a CActive Class....

Regards,
Sir Graham.

liruiming 11 Oct 2003, 02:54

I have the same problem,waiting for an answer.

elmira 13 Oct 2003, 09:38

I solved this problem (with stray signal) by setting active object e.t SetActive() which indicate that active obbject issue request to asynchronous service provider .
It may help

thisisbhaskar 26 Oct 2007, 06:47

btsocket->Read(data,status);

int timeout = 1000;
RTimer timer;
TRequestStatus timerstatus;
int nsteps = 2;
int step = ((timeout*1000)/nsteps);

timer.CreateLocal();

timer.After(timerstatus,step);

for( ; ; )
{
User::WaitForAnyRequest();
if(timerstatus!=KRequestPending)
{
nsteps--;
if(!nsteps)
{
// timeout cancelread operation
btsocket->CancelRead();
break;
}
timer.After(timerstatus,step);
}
else if (status!=KRequestPending)
{
// got some data on socket...
timer->Cancel();
break;
}
}
timer.Close();

//Hope it works