[so] [Tema4] Operatii asincrone

[Dragos Sbarlea]

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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