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bpo-31558: Add gc.freeze() (#3705)

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Freeze all the objects tracked by gc - move them to a permanent generation
and ignore all the future collections. This can be used before a POSIX
fork() call to make the gc copy-on-write friendly or to speed up collection.
This commit is contained in:
brainfvck 2017-10-16 12:49:41 -07:00 • committed by Łukasz Langa
parent bdaeb7d237
commit c75edabbb6
5 changed files with 169 additions and 2 deletions
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Include/internal/mem.h
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@ -167,6 +167,8 @@ struct _gc_runtime_state {
/* linked lists of container objects */
struct gc_generation generations[NUM_GENERATIONS];
PyGC_Head *generation0;
/* a permanent generation which won't be collected */
struct gc_generation permanent_generation;
struct gc_generation_stats generation_stats[NUM_GENERATIONS];
/* true if we are currently running the collector */
int collecting;