1Emulation.Com > Infinite lop + recv() + select()

Full Version: Infinite lop + recv() + select()

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vha

Nov 28 2007, 10:50 PM

How can I interrupt waiting for data in recv() function? I must wait until function recive data from server to proceed.

CODE

while (1)
    {

readbytes = recv(gniazdo, (char*)&glowa, sizeof(glowa), 0 );


            if (Stylus.X<19 && Stylus.Y>172)
        {
            if(keybord<=0)
                {if(keybord==-1)PA_InitKeyboard(2);PA_KeyboardIn(20, 95); keybord=1;}
            else
                {PA_KeyboardOut();keybord=0;}
                Stylus.X=0; Stylus.Y=0;

        }
.
.
.
}

If i dont get data then i can't read stylus position.

I solve this problem on my PC:

CODE

struct timeval tv = {0,0};
    while(1)
    {
                fd_set fs = {1,gniazdo};
           if (select(0, &fs,NULL,NULL,&tv) == 1)
                {

    readbytes = recv(gniazdo, (char*)&glowa, sizeof(glowa), 0);
            if (...)
        {
            ...

        }
.
.
.
}

But this method don’t seam to work on DS

what is wrong with my code? how can I fix it?

sorry for my poor Englis

Weirdy

Nov 28 2007, 11:15 PM

Using select() and recv() would mean that the DS would have to be POSIX compatible, no? Or at least mean that there are libraries available that make it compatible with POSIX.

vha

Nov 28 2007, 11:39 PM

QUOTE (Weirdy @ Nov 29 2007, 12:15 AM)

Using select() and recv() would mean that the DS would have to be POSIX compatible, no? Or at least mean that there are libraries available that make it compatible with POSIX.

you want to say that i can't use select() on DS?
than why this guy is using it?:
http://www.1emulation.com/forums/index.php?showtopic=22833

as you can see code is very similar

sgstair

Nov 28 2007, 11:58 PM

select() is supported in the dswifi lib - you just can't setup the fd_set like that.
Another alternative would be to use nonblocking sockets (research ioctl() and FIONBIO)

Good luck

vha

Nov 29 2007, 12:37 AM

QUOTE (sgstair @ Nov 29 2007, 12:58 AM)

select() is supported in the dswifi lib - you just can't setup the fd_set like that.
Another alternative would be to use nonblocking sockets (research ioctl() and FIONBIO)

Good luck

god this is so simple

thx m8

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