Re: pool threads

[Marco Spinetti]

For everyone who will real this threads, the second example is the right 
one ;-)
Bye

Marco Spinetti ha scritto:
Seeing the examples in:
http://svn.apache.org/repos/asf/apr/examples/trunk/cat/
I tried to do these changes:
In each thread:

.....
context_1 = (apr_pool_t *)data;
  if (apr_pool_create(&subpool, context_1) != APR_SUCCESS) {
       apr_thread_exit(thd, exit_ret_val);
}
      for ( ; ; ) {
   apr_pool_clear(subpool);
   apr_thread_mutex_lock(lock);
     <read_an_entry_of_array>

   apr_thread_mutex_unlock(lock);
     <elaborates_the entry_of_array>
}
..........
apr_pool_destroy(subpool);  apr_thread_exit(thd, exit_ret_val);


But  nothing changes.....

Marco


Marco Spinetti ha scritto:
Hi,
I have a question about how to use pool in threads.
I have a main which reads a file and fills an array with about 160000 
structs.
Then the mian starts NTHREADS threads with the main pool of main:

apr_thread_create(&tptr[i]->thread_tid, NULL, thread_main, 
(void*)context, context)

Each thread is an infinite loop:

..............

for ( ; ; ) {
       apr_pool_t *subpool;
             if (apr_pool_create(&subpool, context) != APR_SUCCESS) {
           return;
       }
       apr_pool_clear(subpool);
       apr_thread_mutex_lock(lock);
        <read_an_entry_of_array_and_elaborates_it>

      apr_thread_mutex_unlock(lock);
             apr_pool_destroy(subpool);
}

A the end the last thread does apr_thread_cond_signal(lock_cond) 
where the main is locked.
I'd like to know:

1) Is it the right way to use subpool for a multi-threading programme?
2) In the way I'm using threads after about 200 lines I have a 
segmentation fault. So I suppose that there is someting wrong: any 
advice?

Best regards

Marco