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xo-object2: utest: ++ allocation in collector utest

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This commit is contained in:
Roland Conybeare 2026-01-02 18:55:53 -05:00
commit c1ebe1febd
9 changed files with 73 additions and 22 deletions
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13
include/xo/alloc2/AllocHeaderConfig.hpp
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@ -51,6 +51,19 @@ namespace xo {
age_bits_{a},
size_bits_{z} {}
/** create header tuple (@p t, @p a, @p z)
* with typeseq @p t, age @p a, size @p z
**/
std::uint64_t mkheader(std::uint64_t t,
std::uint64_t a,
std::uint64_t z) const noexcept {
uint64_t tseq_bits = (t << (age_bits_ + size_bits_)) & tseq_mask();
uint64_t age_bits = (a << size_bits_) & age_mask();
uint64_t size_bits = z & size_mask();;
return (tseq_bits | age_bits | size_bits);
}
std::uint64_t tseq_mask() const noexcept {
// e.g.
// FF FF FF 00 00 00 00 00