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xo-alloc: streamlining DArena allocation: + construct_with() helper

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This commit is contained in:
Roland Conybeare 2025-12-18 19:41:47 -05:00
commit 1ec9759f19
5 changed files with 53 additions and 42 deletions
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12
src/alloc2/IAllocator_DArena.cpp
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@ -74,16 +74,8 @@ namespace xo {
IAllocator_DArena::alloc_range(const DArena & s,
DArena & ialloc) noexcept -> range_type
{
byte * begin_mem = IAllocator_DArena::alloc(ialloc,
sizeof(DArenaIterator));
byte * end_mem = IAllocator_DArena::alloc(ialloc,
sizeof(DArenaIterator));
assert(begin_mem);
assert(end_mem);
DArenaIterator * begin_ix = new (begin_mem) DArenaIterator(&s, DArenaIterator::begin_header(&s));
DArenaIterator * end_ix = new ( end_mem) DArenaIterator(&s, DArenaIterator::end_header(&s));
DArenaIterator * begin_ix = construct_with<DArenaIterator>(ialloc, &s, s.begin_header());
DArenaIterator * end_ix = construct_with<DArenaIterator>(ialloc, &s, s.end_header());
obj<AAllocIterator> begin_obj = with_facet<AAllocIterator>::mkobj(begin_ix);
obj<AAllocIterator> end_obj = with_facet<AAllocIterator>::mkobj( end_ix);