42 lines
851 B
C++
42 lines
851 B
C++
namespace factor {
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template <typename Block> struct bump_allocator {
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/* offset of 'here' and 'end' is hardcoded in compiler backends */
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cell here;
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cell start;
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cell end;
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cell size;
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bump_allocator(cell size, cell start)
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: here(start), start(start), end(start + size), size(size) {}
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bool contains_p(Block* block) { return ((cell)block - start) < size; }
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Block* allot(cell size) {
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cell h = here;
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here = h + align(size, data_alignment);
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return (Block*)h;
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}
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cell occupied_space() { return here - start; }
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cell free_space() { return end - here; }
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cell next_object_after(cell scan) {
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cell size = ((Block*)scan)->size();
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if (scan + size < here)
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return scan + size;
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else
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return 0;
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}
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cell first_object() {
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if (start != here)
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return start;
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else
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return 0;
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}
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};
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}
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