*/
if (!reader_data)
return;
- debug_yield_write();
sig_done = 0;
- debug_yield_write();
smp_mb(); /* write sig_done before sending the signals */
- debug_yield_write();
- for (index = reader_data; index < reader_data + num_readers; index++) {
+ 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();
smp_mb(); /* read sig_done before ending the barrier */
- debug_yield_write();
}
#endif
* where new ptr points to. */
/* Write new ptr before changing the qparity */
force_mb_all_threads();
- debug_yield_write();
internal_urcu_lock();
- debug_yield_write();
switch_next_urcu_qparity(); /* 0 -> 1 */
- debug_yield_write();
/*
* Must commit qparity update to memory before waiting for parity
* Wait for previous parity to be empty of readers.
*/
wait_for_quiescent_state(); /* Wait readers in parity 0 */
- debug_yield_write();
/*
* Must finish waiting for quiescent state for parity 0 before
smp_mb();
switch_next_urcu_qparity(); /* 1 -> 0 */
- debug_yield_write();
/*
* Must commit qparity update to memory before waiting for parity
* Wait for previous parity to be empty of readers.
*/
wait_for_quiescent_state(); /* Wait readers in parity 1 */
- debug_yield_write();
internal_urcu_unlock();
- debug_yield_write();
/* All threads should finish using the data referred to by old ptr
* before decrementing their urcu_active_readers count */
/* Finish waiting for reader threads before letting the old ptr being
* freed. */
force_mb_all_threads();
- debug_yield_write();
}
void urcu_add_reader(pthread_t id)