| | | atomic-pushnew | |
|
| item place
&key key test test-not | [Macro] |
Purpose
As an atomic operation, when item is not
the same as any element in the list stored in
Package :portable-threads
Module :portable-threads
Arguments and values
| item | An object | |
| place | A form which is suitable for use as a generalized reference that contains a proper list | |
| key | A function designator specifying a function object
of one argument, or nil (default is nil)
| |
| test | A function designator specifying a function object
of two arguments that returns a generalized boolean (default is
#'eql | |
| test-not | A function designator specifying a
function object of two arguments that returns a
generalized boolean (use of :test-not | |
| new-place-value | A proper list |
Returns
The new value of place.
See also
as-atomic-operation
atomic-delete
atomic-flush
atomic-pop
atomic-push
Examples
> list (1 2 3) > (atomic-pushnew 2 list) (1 2 3) > (atomic-pushnew 10 list) (10 1 2 3) >
The GBBopen Project
| | | atomic-pushnew | |