Erwtisi gia socket programming

[Giorgos Keramidas]

On Wed, Apr 11, 2001 at 11:51:07PM +0300, Michalis Kabrianis wrote:
>
> > Na rwthsw ki egw kati panw se auto. H inet_ntoa bazei to apotelesma se
> > static buffer. Yparxei kapoia etoimh analogh function pou einai thread
> > safe?
> 
> Seira mou na min katalabw.
> I inet_ntoa bazei to apotelesma se char* to opoio pragmati mpainei se
> statically allocated buffer, alla ti se empodizei na to kaneis assign se
> mia diki sou metabliti?

Oh, ennoeis me kati opws to parakato code fragment ?

	struct in_addr *addr;
	char *

	ptr = strdup(inet_ntoa(*addr));

Thread / time diagram me antiparadeigma included below:

 Thread 1					 Thread 2

   |						   |
   |						   |
   | enter inet_ntoa				   |
   |						   | enter inet_ntoa
   | write some data to static buffer		   |
   |						   | write some other data in static buffer
   | return from inet_ntoa			   |
   | enter strdup				   |
   |						   | return from inet_ntoa
   |						   | enter strdup
   |						   |
   |						   |

BOOM!

--giorgos