Problem with pthread_create() - passing argument for start_routine

[erwann]

On a Linux platform:
Hi,

I am just trying to pass an integer as an argument to my start_routine when creating a thread with pthread_create:

In my .h file:
short portfd;
void *receive_talker(void* portfd);

In main():
thread_talker is declared as " pthread_t thread_talker; "
pthread_create(&thread_talker,NULL,receive_talker, (void *)portfd); (line 125)

In my .h file:
short portfd;
void *receive_talker(void* portfd);

receive_talker is written like this after main():

void *receive_talker(void *portfd) {
...
}

When compiling, I get the following message:

"warning: cast to pointer from integer of different size "

I also tried:

pthread_create(&thread_talker,NULL,receive_talker, (void *)(&portfd));

then I get:

" Segmentation fault "

...and the execution stops

from a printf("portfd %d\n", (int) portfd )) I can get:

portfd = 268513978 when supposed to be smth like 1 or 2...

I ve got the same 268513978 with :
printf("portfd %d\n", (int *) portfd ))

I guess something is wrong with either the way I pass my variable to the thread or with the way I use the passed variable in my start routine.

I am not so familiar with C so if anybody can help...
Thanks

[horace1]

try making this an int

int portfd;