#include <errno.h>
#include <poll.h>
+#define BUILD_QSBR_LIB
#include "urcu-qsbr-static.h"
/* Do not #define _LGPL_SOURCE to ensure we can emit the wrapper symbols */
#include "urcu-qsbr.h"
}
#endif /* #ifdef HAS_INCOHERENT_CACHES */
-static void force_mb_all_threads(void)
-{
- smp_mb();
-}
-
static void wait_for_quiescent_state(void)
{
struct reader_registry *index;
*/
for (index = registry; index < registry + num_readers; index++) {
#ifndef HAS_INCOHERENT_CACHES
- while (rcu_gp_ongoing(index->rcu_reader_qs_gp) &&
- (*index->rcu_reader_qs_gp - urcu_gp_ctr < 0))
+ while (rcu_gp_ongoing(index->rcu_reader_qs_gp))
cpu_relax();
#else /* #ifndef HAS_INCOHERENT_CACHES */
int wait_loops = 0;
* BUSY-LOOP. Force the reader thread to commit its
* rcu_reader_qs_gp update to memory if we wait for too long.
*/
- while (rcu_gp_ongoing(index->rcu_reader_qs_gp) &&
- (*index->rcu_reader_qs_gp - urcu_gp_ctr < 0)) {
+ while (rcu_gp_ongoing(index->rcu_reader_qs_gp)) {
if (wait_loops++ == KICK_READER_LOOPS) {
force_mb_single_thread(index);
wait_loops = 0;
* our own quiescent state. This allows using synchronize_rcu() in
* threads registered as readers.
*/
+ smp_mb();
if (was_online)
- _rcu_thread_offline();
+ STORE_SHARED(rcu_reader_qs_gp, 0);
internal_urcu_lock();
- force_mb_all_threads();
- urcu_gp_ctr += 2;
+ STORE_SHARED(urcu_gp_ctr, urcu_gp_ctr + 2);
wait_for_quiescent_state();
- force_mb_all_threads();
internal_urcu_unlock();
if (was_online)
- _rcu_thread_online();
+ _STORE_SHARED(rcu_reader_qs_gp, LOAD_SHARED(urcu_gp_ctr) + 1);
+ smp_mb();
}
/*