py/modgc: Add gc.add_heap() function for runtime heap expansion.#41
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andrewleech wants to merge 1 commit intomasterfrom
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py/modgc: Add gc.add_heap() function for runtime heap expansion.#41andrewleech wants to merge 1 commit intomasterfrom
andrewleech wants to merge 1 commit intomasterfrom
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Add a Python-level gc.add_heap(nbytes) that allocates a new heap segment from the system allocator and registers it with the split-heap GC. Available when MICROPY_GC_SPLIT_HEAP_ADD is enabled (off by default). Useful on hosted ports where the working set can grow at runtime beyond the initial heap allocation. Returns the new total heap size; raises ValueError for sizes below the minimum (4096 bytes) and MemoryError if the system allocation fails. Signed-off-by: Andrew Leech <andrew.leech@planetinnovation.com.au>
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Summary
Adds
gc.add_heap(nbytes)which allocates a new heap segment from the system allocator and registers it with the split-heap GC. Useful on hosted ports where the working set can grow at runtime beyond the initial heap. Available whenMICROPY_GC_SPLIT_HEAP_ADDis enabled (off by default).Testing
Unix port with
MICROPY_GC_SPLIT_HEAP=1andMICROPY_GC_SPLIT_HEAP_ADD=1; verified additional segments are usable and that allocation past the initial heap succeeds.