[Freeswitch-dev] upgrade a rdlock to wrlock

Hi, Just wondering how to upgrade a read lock to a write lock, say I do a find_or_create_item_in_queue() switch_thread_rwlock_rdlock(lock); find an item from queue, if not found, create one switch_thread_rwlock_upgrade_to_wrlock(lock); write switch_thread_rwlock_unlock(lock); Thanks -- Seven Du About: http://about.me/dujinfang Blog: http://www.dujinfang.com Proj: http://www.freeswitch.org.cn Sent with Sparrow (http://www.sparrowmailapp.com)