How does socket.io handle queue messages?

there is a broadcast screen. One or more users may send messages to the broadcast screen for broadcasting.
it takes a certain time for each broadcast to play the content (the sound playback method is asynchronous).
when multiple users send broadcast requests at the same time,
how to ensure that they can be played one by one in order? Can
generate a queue in socket.io?
after one broadcast comes in, play the next one.
is similar to the queuing mechanism.
how to deal with this problem.
has been perplexed for a long time. Please give me a solution.
thanks here.

MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1bca230-30153.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1bca230-30153.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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