CMUCL supports static arrays which are arrays that are not moved by
the garbage collector. To create such an array, use the
:allocation option to make-array with a value of
:malloc. These arrays appear as normal Lisp arrays, but are
actually allocated from the C heap (hence the :malloc).
Thus, the number and size of such arrays are limited by the available
C heap.
Also, only certain types of arrays can be allocated. The static array
cannot be adjustable and cannot be displaced to. The array must also
be a simple-array of one dimension. The element type is also
constrained to be one of the types in
Table 2.3.
(unsigned-byte 8) |
(unsigned-byte 16) |
(unsigned-byte 32) |
(signed-byte 8) |
(signed-byte 16) |
(signed-byte 32) |
single-float |
double-float |
(complex single-float) |
(complex double-float) |
Table 2.3: Allowed element types for static arrays
The arrays are properly handled by GC. GC will not move the arrays, but they will be properly removed up if they become garbage.