| | | without-lock-held | |
|
| (lock
&key
whostate)
form*
=> result* | [Macro] |
Purpose
Temporarily release a lock or a recursive lock,
execute forms and then reacquire the lock.
Package :portable-threads
Module :portable-threads
Arguments and values
| lock | A lock, a recursive lock, or a condition variable | |
| whostate | A string (default "Without Lock Held")
| |
| forms | An implicit progn of forms to be evaluated | |
| results | The values returned by evaluating the last form |
Returns
The values returned by evaluating the last form.
Errors
A thread attempts to release a lock that it does not
hold.
See also
make-condition-variable
make-lock
make-recursive-lock
thread-holds-lock-p
thread-whostate
with-lock-held
Example
Acquire and temporarily release a lock controlling access to several
critical sections of code:
(with-lock-held (lock :whostate "Waiting for Critical Lock")
(critical-section-1)
(without-lock-held (lock :whostate "Doing non-critical stuff")
(non-critical-section))
(critical-section-2))
Note
The whostate value is ignored by
SBCL.
The GBBopen Project
| | | without-lock-held | |