[so] [Tema4] Operatii asincrone

[Silviu-Ionut Ganceanu]

E ok daca operatiile I/O din client sunt sincrone (blocante)? Personal nu
vad niciun motiv pentru care ar fi altcumva...

On Dec 10, 2007 8:49 PM, Dragos Sbarlea <sbarlead at yahoo.com> wrote:

> Yup, dar, din ce am citit POSIX spune ca fcntl se foloseste pentru asta...
>
> Dragos Dumitru Sbîrlea
> Facultatea de Automatica si Calculatoare
> Universitatea Politehnica din Bucuresti
>
>
> ----- Original Message ----
> From: "cosminratiu at gmail.com" <cosminratiu at gmail.com>
> To: Sisteme de Operare <so at cursuri.cs.pub.ro>
> Sent: Monday, 10 December, 2007 8:31:14 PM
> Subject: Re: [so] [Tema4] Operatii asincrone
>
> Mai simplu este cu ioctl cu FIONBIO, asa cum e in laborator.
>
> //puts a socket in nonblocking mode
> void set_nonblocking(int s)
> {
> 	int m = 1;
> 	ioctl(s, FIONBIO, &m);
> }
>
>
>
> On Dec 10, 2007 7:19 PM, Dragos Sbarlea <sbarlead at yahoo.com> wrote:
>
> > Ca sa fim chitibusari  (sau iubitori de corectitudine) ar trebui mai
> > intai sa luam flagurile curente (F_GETFL) pentru socket si apoi sa adaugam
> > flagul O_NONBLOCK. :)
> >
> > Cum celelalte flaguri nu prea se pot folosi la socketi cred ca  e ok si
> > asa, dar cine stie...
> >
> >  Dragos Dumitru Sbîrlea
> > Facultatea de Automatica si Calculatoare
> > Universitatea Politehnica din Bucuresti
> >
> > ----- Original Message ----
> > From: Iulian Moraru <iulian at gmail.com>
> > To: Sisteme de Operare <so at cursuri.cs.pub.ro>
> > Sent: Monday, 10 December, 2007 2:00:58 PM
> > Subject: Re: [so] [Tema4] Operatii asincrone
> >
> > On Dec 10, 2007 1:40 PM, Alexandru-Mihai Carp < carpalex at gmail.com>
> > wrote:
> > > Lucian Adrian Grijincu wrote:
> > > >
> > > > Pentru socketi trebuie folosite operatii non-blocante.
> > > >
> > > >
> > > Pai read / write sau recv / send sunt blocante, daca nu stim cat avem
> > de
> > > trimis / primit.
> > > Singura modalitatate de a fi non-blocante e sa ne asiguram ca nu citim
> > > mai mult decat ni s-a trimis, nu?
> >
> > Faci ca socketul sa fie non-blocant cu fcntl, comanda F_SETFL si
> > flagul O_NONBLOCK. Pe urma read, write, send si recv se vor comporta
> > diferit (cauta EAGAIN in paginile lor de manual).
> >
> > Iulian
> >
> >
> >
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