assert( pRec != nullptr );
uint32_t tmp = pRec->m_nAccessControl.load( atomics::memory_order_relaxed );
+
if ( (tmp & rcu_class::c_nNestMask) == 0 ) {
- pRec->m_nAccessControl.store(
- sh_singleton<RCUtag>::instance()->global_control_word(atomics::memory_order_acquire),
- atomics::memory_order_release
- );
+ pRec->m_nAccessControl.store( sh_singleton<RCUtag>::instance()->global_control_word(atomics::memory_order_relaxed),
+ atomics::memory_order_relaxed );
+
+ // acquire barrier
+ pRec->m_nAccessControl.load( atomics::memory_order_acquire );
}
else {
- pRec->m_nAccessControl.fetch_add( 1, atomics::memory_order_release );
+ // nested lock
+ pRec->m_nAccessControl.store( tmp + 1, atomics::memory_order_relaxed );
}
- CDS_COMPILER_RW_BARRIER;
}
template <typename RCUtag>
thread_record * pRec = get_thread_record();
assert( pRec != nullptr);
- CDS_COMPILER_RW_BARRIER;
- pRec->m_nAccessControl.fetch_sub( 1, atomics::memory_order_release );
+ uint32_t tmp = pRec->m_nAccessControl.load( atomics::memory_order_relaxed );
+ assert( ( tmp & rcu_class::c_nNestMask ) > 0 );
+
+ pRec->m_nAccessControl.store( tmp - 1, atomics::memory_order_release );
}
template <typename RCUtag>