5.3 Garbage collection

5.3.2 The Ephemeral Garbage Collector

Lisp objects are created in ephemeral level 0. Each time a pointer to an object is changed, a pointer record is updated that records the location of the object. Whenever ephemeral level 0 is full, the Ephemeral Garbage Collector is invoked and performs the following procedure:

• It locates valid objects by searching the pointer record for the ephemeral level that is being reclaimed.

• It copies valid objects from the full ephemeral level to the next ephemeral level.

• If the next level becomes full, the first two steps are performed on that level.

• If the last ephemeral level becomes full, the Dynamic Garbage Collector is called to copy valid Lisp objects from the last ephemeral level to the current dynamic semi-space.

• When garbage collection is finished, new objects are again created in the first ephemeral level.

5.3.2.1 - Disabling ephemeral garbage collection

5.3.2.2 - Modifying ephemeral storage allocation

Generated with Harlequin WebMaker