void __attribute__((destructor)) rcu_exit(void);
-static pthread_mutex_t urcu_mutex = PTHREAD_MUTEX_INITIALIZER;
+static pthread_mutex_t rcu_mutex = PTHREAD_MUTEX_INITIALIZER;
int gp_futex;
/*
* Global grace period counter.
*/
-unsigned long urcu_gp_ctr = RCU_GP_ONLINE;
+unsigned long rcu_gp_ctr = RCU_GP_ONLINE;
/*
* Written to only by each individual reader. Read by both the reader and the
* writers.
*/
-struct urcu_reader __thread urcu_reader;
+struct rcu_reader __thread rcu_reader;
#ifdef DEBUG_YIELD
unsigned int yield_active;
static LIST_HEAD(registry);
-static void internal_urcu_lock(void)
+static void internal_rcu_lock(void)
{
int ret;
#ifndef DISTRUST_SIGNALS_EXTREME
- ret = pthread_mutex_lock(&urcu_mutex);
+ ret = pthread_mutex_lock(&rcu_mutex);
if (ret) {
perror("Error in pthread mutex lock");
exit(-1);
}
#else /* #ifndef DISTRUST_SIGNALS_EXTREME */
- while ((ret = pthread_mutex_trylock(&urcu_mutex)) != 0) {
+ while ((ret = pthread_mutex_trylock(&rcu_mutex)) != 0) {
if (ret != EBUSY && ret != EINTR) {
printf("ret = %d, errno = %d\n", ret, errno);
perror("Error in pthread mutex lock");
#endif /* #else #ifndef DISTRUST_SIGNALS_EXTREME */
}
-static void internal_urcu_unlock(void)
+static void internal_rcu_unlock(void)
{
int ret;
- ret = pthread_mutex_unlock(&urcu_mutex);
+ ret = pthread_mutex_unlock(&rcu_mutex);
if (ret) {
perror("Error in pthread mutex unlock");
exit(-1);
/* Read reader_gp before read futex */
smp_rmb();
if (uatomic_read(&gp_futex) == -1)
- futex(&gp_futex, FUTEX_WAIT, -1,
+ futex_noasync(&gp_futex, FUTEX_WAIT, -1,
NULL, NULL, 0);
}
{
LIST_HEAD(qsreaders);
int wait_loops = 0;
- struct urcu_reader *index, *tmp;
+ struct rcu_reader *index, *tmp;
if (list_empty(®istry))
return;
#if (BITS_PER_LONG < 64)
/*
- * called with urcu_mutex held.
+ * called with rcu_mutex held.
*/
-static void switch_next_urcu_qparity(void)
+static void switch_next_rcu_qparity(void)
{
- STORE_SHARED(urcu_gp_ctr, urcu_gp_ctr ^ RCU_GP_CTR);
+ STORE_SHARED(rcu_gp_ctr, rcu_gp_ctr ^ RCU_GP_CTR);
}
void synchronize_rcu(void)
{
unsigned long was_online;
- was_online = urcu_reader.ctr;
+ was_online = rcu_reader.ctr;
/* All threads should read qparity before accessing data structure
* where new ptr points to.
* threads registered as readers.
*/
if (was_online)
- STORE_SHARED(urcu_reader.ctr, 0);
+ STORE_SHARED(rcu_reader.ctr, 0);
- internal_urcu_lock();
+ internal_rcu_lock();
- switch_next_urcu_qparity(); /* 0 -> 1 */
+ switch_next_rcu_qparity(); /* 0 -> 1 */
/*
* Must commit qparity update to memory before waiting for parity
* Ensured by STORE_SHARED and LOAD_SHARED.
*/
- switch_next_urcu_qparity(); /* 1 -> 0 */
+ switch_next_rcu_qparity(); /* 1 -> 0 */
/*
* Must commit qparity update to memory before waiting for parity
*/
wait_for_quiescent_state(); /* Wait readers in parity 1 */
- internal_urcu_unlock();
+ internal_rcu_unlock();
/*
* Finish waiting for reader threads before letting the old ptr being
* freed.
*/
if (was_online)
- _STORE_SHARED(urcu_reader.ctr, LOAD_SHARED(urcu_gp_ctr));
+ _STORE_SHARED(rcu_reader.ctr, LOAD_SHARED(rcu_gp_ctr));
smp_mb();
}
#else /* !(BITS_PER_LONG < 64) */
{
unsigned long was_online;
- was_online = urcu_reader.ctr;
+ was_online = rcu_reader.ctr;
/*
* Mark the writer thread offline to make sure we don't wait for
*/
smp_mb();
if (was_online)
- STORE_SHARED(urcu_reader.ctr, 0);
+ STORE_SHARED(rcu_reader.ctr, 0);
- internal_urcu_lock();
- STORE_SHARED(urcu_gp_ctr, urcu_gp_ctr + RCU_GP_CTR);
+ internal_rcu_lock();
+ STORE_SHARED(rcu_gp_ctr, rcu_gp_ctr + RCU_GP_CTR);
wait_for_quiescent_state();
- internal_urcu_unlock();
+ internal_rcu_unlock();
if (was_online)
- _STORE_SHARED(urcu_reader.ctr, LOAD_SHARED(urcu_gp_ctr));
+ _STORE_SHARED(rcu_reader.ctr, LOAD_SHARED(rcu_gp_ctr));
smp_mb();
}
#endif /* !(BITS_PER_LONG < 64) */
_rcu_read_unlock();
}
-void *rcu_dereference(void *p)
-{
- return _rcu_dereference(p);
-}
-
-void *rcu_assign_pointer_sym(void **p, void *v)
-{
- wmb();
- return STORE_SHARED(p, v);
-}
-
-void *rcu_cmpxchg_pointer_sym(void **p, void *old, void *_new)
-{
- wmb();
- return uatomic_cmpxchg(p, old, _new);
-}
-
-void *rcu_xchg_pointer_sym(void **p, void *v)
-{
- wmb();
- return uatomic_xchg(p, v);
-}
-
-void *rcu_publish_content_sym(void **p, void *v)
-{
- void *oldptr;
-
- oldptr = _rcu_xchg_pointer(p, v);
- synchronize_rcu();
- return oldptr;
-}
-
void rcu_quiescent_state(void)
{
_rcu_quiescent_state();
void rcu_register_thread(void)
{
- urcu_reader.tid = pthread_self();
- assert(urcu_reader.ctr == 0);
+ rcu_reader.tid = pthread_self();
+ assert(rcu_reader.ctr == 0);
- internal_urcu_lock();
- list_add(&urcu_reader.head, ®istry);
- internal_urcu_unlock();
+ internal_rcu_lock();
+ list_add(&rcu_reader.head, ®istry);
+ internal_rcu_unlock();
_rcu_thread_online();
}
* with a waiting writer.
*/
_rcu_thread_offline();
- internal_urcu_lock();
- list_del(&urcu_reader.head);
- internal_urcu_unlock();
+ internal_rcu_lock();
+ list_del(&rcu_reader.head);
+ internal_rcu_unlock();
}
void rcu_exit(void)