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pthread_create

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# 1  
Old 11-14-2010
Debian pthread_create
The prototype for pthread_create function is like this:-
Code:
int pthread_create(pthread_t *thread,pthread_attr_t *attr,void *(*start routine),void *arg);

Q.1 .Why the return type of the start_routine must be void*??
Q.2. Why should we pass arg by converting into void * only ??

Thank You
Last edited by Scott; 11-15-2010 at 02:58 AM.. Reason: Code tags
# 2  
Old 11-15-2010
1. So you can return whatever type you want.
2. Again So you can pass what ever argument to the thread function.
This User Gave Thanks to majid.merkava For This Post:
sunil_abhay
# 3  
Old 11-15-2010
Because that is the way the people who were developing the POSIX threads standard agreed to do it. These were the same people who developed actual POSIX threads implementations in operating systems.
This User Gave Thanks to fpmurphy For This Post:
sunil_abhay
# 4  
Old 11-15-2010
Hi Sunnil,

This post Pthreads arguments passing shows how this works concretly.

Hope this helps,
Loïc
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