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Heap allocation supports deallocation of allocated memory in any order. Dictionary allocation is not affected by it (i.e., it does not end a contiguous region). In Gforth, these words are implemented using the standard C library calls malloc(), free() and resize().
The memory region produced by one invocation of
resize is internally contiguous. There is no contiguity between
such a region and any other region (including others allocated from the
doc-allocate doc-free doc-resize
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