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xo-gc: + execute_gc() scaffold

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This commit is contained in:
Roland Conybeare 2026-01-03 00:19:26 -05:00
commit e0cb07c9f5
9 changed files with 112 additions and 6 deletions
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59
xo-gc/src/gc/DX1Collector.cpp
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@ -228,6 +228,65 @@ namespace xo {
return true;
}
void
DX1Collector::add_gc_root(typeseq tseq,
Opaque * root) noexcept
{
(void)tseq;
(void)root;
}
void
DX1Collector::request_gc(generation upto) noexcept
{
if (gc_blocked_ > 0) {
if (gc_pending_upto_ < upto) {
this->gc_pending_upto_ = upto;
}
/* intend collecting later */
} else {
this->execute_gc(upto);
}
}
void
DX1Collector::execute_gc(generation upto) noexcept
{
scope log(XO_DEBUG(true), xtag("upto", upto));
//auto t0 = std::chrono::steady_clock::now();
log && log("step 0a : [STUB] snapshot alloc state");
log && log("step 0b : [STUB] scan for object statistics");
log && log("step 1 : swap from/to roles");
this->swap_roles(upto);
log && log("step 2a : copy roots");
this->copy_roots(upto);
log && log("step 2b : [STUB] copy pinned");
log && log("step 3a : [STUB] run destructors");
log && log("step 3b : [STUB] keep reachable weak pointers");
log && log("step 4 : [STUB] cleanup");
}
void
DX1Collector::swap_roles(generation upto) noexcept
{
for (generation g = generation{0}; g < upto; ++g) {
std::swap(space_[role::to_space()][g], space_[role::from_space()][g]);
}
}
void
DX1Collector::copy_roots(generation upto) noexcept
{
scope log(XO_DEBUG(true), "STUB", xtag("upto", upto));
}
auto
DX1Collector::alloc(typeseq t, size_type z) noexcept -> value_type
{