A sharing lock.
The status of the process while the lock is locked, as seen in the Process Browser.
A timeout period, in seconds.
The forms to execute
is the same as with-lock, except that the lock must be "sharing", that is, created with the argument
true in make-lock. It waits until
is completely free, that is, the lock is not locked in a sharing mode and is not locked in exclusive mode by another thread. It then locks the lock
in exclusive mode, evaluates
and unlocks the lock.
It is not possible to use an exclusive lock in the scope of a sharing-lock on the same lock, and trying to do it will cause the process to hang. Whether it is possible to use exclusive-lock inside exclusive-lock of the same lock is determined by the recursivep argument in make-lock.
LispWorks User Guide and Reference Manual - 21 Dec 2011