[Freeswitch-dev] upgrade a rdlock to wrlock

[Seven Du]

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
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