unsigned long ctr;
bool waiting;
+ /* Data used by reader only */
+ unsigned depth;
+
/* Data used for registry, protected by rcu_gp_lock */
QLIST_ENTRY(rcu_reader_data) node;
};
static inline void rcu_read_lock(void)
{
struct rcu_reader_data *p_rcu_reader = &rcu_reader;
+ unsigned ctr;
+
+ if (p_rcu_reader->depth++ > 0) {
+ return;
+ }
- unsigned ctr = atomic_read(&rcu_gp_ctr);
+ ctr = atomic_read(&rcu_gp_ctr);
atomic_xchg(&p_rcu_reader->ctr, ctr);
if (atomic_read(&p_rcu_reader->waiting)) {
atomic_set(&p_rcu_reader->waiting, false);
{
struct rcu_reader_data *p_rcu_reader = &rcu_reader;
+ assert(p_rcu_reader->depth != 0);
+ if (--p_rcu_reader->depth > 0) {
+ return;
+ }
+
atomic_xchg(&p_rcu_reader->ctr, 0);
if (atomic_read(&p_rcu_reader->waiting)) {
atomic_set(&p_rcu_reader->waiting, false);