60 lines
1.3 KiB
C++
60 lines
1.3 KiB
C++
/* @file IAlloc.cpp
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*
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* author: Roland Conybeare, Aug 2025
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*/
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#include "IAlloc.hpp"
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#include <cassert>
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#include <cstddef>
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namespace xo {
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namespace gc {
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std::uint32_t
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IAlloc::alloc_padding(std::size_t z)
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{
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/* word size for alignment */
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constexpr uint32_t c_bpw = sizeof(std::uintptr_t);
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/* round up to multiple of c_bpw, but map 0 -> 0
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* (table assuming c_bpw==8)
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*
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* z%c_bpw dz
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* ------------
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* 0 0
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* 1 7
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* 2 6
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* .. ..
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* 7 1
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*/
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std::uint32_t dz = (c_bpw - (z % c_bpw)) % c_bpw;
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z += dz;
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assert(z % c_bpw == 0ul);
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return dz;
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}
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std::size_t
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IAlloc::with_padding(std::size_t z)
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{
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return z + alloc_padding(z);
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}
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void
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IAlloc::assign_member(Object * /*parent*/, Object ** lhs, Object * rhs)
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{
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*lhs = rhs;
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}
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std::byte *
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IAlloc::alloc_gc_copy(std::size_t /*z*/, const void * /*src*/)
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{
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assert(false);
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return nullptr;
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}
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} /*namespace gc*/
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} /*namespace xo*/
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/* end IAlloc.cpp */
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