29e
Subj : Re: pthreads with C++
To   : comp.lang.c++,comp.programming.threads
From : Nadina
Date : Mon Apr 18 2005 10:49 pm

Hi,

In order to pass variables to pthreads you can use either
-global variables, either the
-void* arg
parameter of function
int pthread_create(pthread_t *tid, const pthread_attr_t *attr, void
*(*funct)(void*), void *arg);

Now with global variables, they are visible to all the threads and you
would need to lock them as each individual thread accesses the glob
variable (if M  is modified).

With the (void* arg) you do not need to worry about locking.

Embeding M into a void * is as simple as:
(void *) &M

Nadina

.

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