int *urcu_active_readers;
};
+#ifdef DEBUG_YIELD
+unsigned int yield_active;
+unsigned int __thread rand_yield;
+#endif
+
static struct reader_data *reader_data;
static int num_readers, alloc_readers;
static int sig_done;
*/
if (!reader_data)
return;
+ debug_yield_write();
sig_done = 0;
+ debug_yield_write();
mb(); /* write sig_done before sending the signals */
- for (index = reader_data; index < reader_data + num_readers; index++)
+ debug_yield_write();
+ for (index = reader_data; index < reader_data + num_readers; index++) {
pthread_kill(index->tid, SIGURCU);
+ debug_yield_write();
+ }
/*
* Wait for sighandler (and thus mb()) to execute on every thread.
* BUSY-LOOP.
*/
while (sig_done < num_readers)
barrier();
+ debug_yield_write();
mb(); /* read sig_done before ending the barrier */
+ debug_yield_write();
}
void wait_for_quiescent_state(int parity)
/* All threads should read qparity before accessing data structure. */
/* Write ptr before changing the qparity */
force_mb_all_threads();
+ debug_yield_write();
prev_parity = switch_next_urcu_qparity();
+ debug_yield_write();
/*
* Wait for previous parity to be empty of readers.
void synchronize_rcu(void)
{
+ debug_yield_write();
internal_urcu_lock();
+ debug_yield_write();
switch_qparity();
+ debug_yield_write();
switch_qparity();
+ debug_yield_write();
internal_urcu_lock();
+ debug_yield_write();
}
/*
{
void *oldptr;
+ debug_yield_write();
internal_urcu_lock();
+ debug_yield_write();
/*
* We can publish the new pointer before we change the current qparity.
* Readers seeing the new pointer while being in the previous qparity
* when the next quiescent state window will be over.
*/
oldptr = *ptr;
+ debug_yield_write();
*ptr = new;
+ debug_yield_write();
switch_qparity();
+ debug_yield_write();
switch_qparity();
+ debug_yield_write();
internal_urcu_unlock();
+ debug_yield_write();
return oldptr;
}