Synopsis:

 Attempt to obtain a named mutex
 Introduced in Asterisk 1.6

Description:

 LOCK(<lockname>)

 Attempts to grab a named lock exclusively, and prevents other channels from
 obtaining the same lock.  LOCK will wait for the lock to become available.
 Returns 1 if the lock was obtained or 0 on error.

Notes

To avoid the possibility of a deadlock, LOCK will only attempt to
obtain the lock for 3 seconds if the channel already has another lock.

• *CLI> show function LOCK

See also

• Asterisk func trylock Function TRYLOCK()
• Asterisk func unlock Function UNLOCK()
• Asterisk cmd MacroExclusive
• Asterisk variables
• Asterisk functions

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• Asterisk - documentation of application commands