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added GC_addCycleRoot

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Araq 2013-02-12 08:45:01 +01:00
commit 0f2aa053d9
3 changed files with 16 additions and 4 deletions
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7
doc/gc.txt
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@ -26,7 +26,12 @@ The cycle collector can be en-/disabled independently from the other parts of
the GC with ``GC_enableMarkAndSweep`` and ``GC_disableMarkAndSweep``. The
compiler analyses the types for their possibility to build cycles, but often
it is necessary to help this analysis with the ``acyclic`` pragma (see
`acyclic <manual.html#acyclic-pragma>`_ for further information).
`acyclic <manual.html#acyclic-pragma>`_ for further information).
You can also use the ``acyclic`` pragma for data that is cyclic in reality and
then break up the cycles explicitly with ``GC_addCycleRoot``. This can be a
very good optimization; the Nimrod compiler itself relies on this optimization
trick to improve performance.
To force a full collection call ``GC_fullCollect``. Note that it is generally
better to let the GC do its work and not enforce a full collection.