55 lines
833 B
C++
55 lines
833 B
C++
namespace factor
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{
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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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explicit 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)
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{
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return ((cell)block - start) < size;
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}
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Block *allot(cell size)
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{
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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()
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{
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return here - start;
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}
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cell free_space()
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{
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return end - here;
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}
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cell next_object_after(cell scan)
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{
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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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{
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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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