Kas võivad juhtuda, kui peamise järjekorra sync-kutse kasutamine ei põhjusta vastastikust lukustamist?

Calling sync on the main queue usually results in mutual blocking if called from the same main queue, as it will wait for the current block to finish, which cannot start until the current one ends. However, if the sync call on the main queue is made from another thread (not from the main queue), there will be no mutual blocking, as the main thread can execute the block and release the call.

Example:

DispatchQueue.main.sync {
    // This code will execute without mutual blocking if the call is made from a background thread
}