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+ docs in xo-alloc2/ + misc improvements

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This commit is contained in:
Roland Conybeare 2025-12-11 22:18:09 -05:00
commit 5964bcf3d5
22 changed files with 763 additions and 121 deletions
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66
utest/arena.test.cpp
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@ -6,12 +6,19 @@
#include "xo/alloc2/AAllocator.hpp"
#include "xo/alloc2/DArena.hpp"
#include "xo/alloc2/IAllocator_DArena.hpp"
#include "xo/alloc2/RAllocator.hpp"
#include "xo/alloc2/padding.hpp"
#include "xo/facet/obj.hpp"
#include <catch2/catch.hpp>
namespace xo {
using xo::mm::AAllocator;
using xo::mm::IAllocator_Xfer;
using xo::mm::DArena;
using xo::mm::ArenaConfig;
using xo::facet::obj;
using std::byte;
using std::size_t;
namespace ut {
TEST_CASE("IAllocator_Xfer_DArena", "[alloc2]")
@ -20,6 +27,65 @@ namespace xo {
REQUIRE(IAllocator_Xfer<DArena>::_valid);
}
TEST_CASE("DArena", "[alloc2][DArena]")
{
ArenaConfig cfg { .name_ = "testarena",
.size_ = 1 };
DArena arena = DArena::map(cfg);
REQUIRE(arena.config_.name_ == cfg.name_);
REQUIRE(arena.lo_ != nullptr);
REQUIRE(arena.free_ == arena.lo_);
REQUIRE(arena.limit_ == arena.lo_);
REQUIRE(arena.hi_ != nullptr);
REQUIRE(arena.hi_ > arena.lo_);
REQUIRE(((size_t)arena.hi_ - (size_t)arena.lo_) % cfg.hugepage_z_ == 0);
REQUIRE(arena.lo_ + cfg.size_ <= arena.hi_);
/* verify arena.lo_ is aligned on a hugepage boundary */
REQUIRE(((size_t)(arena.lo_) & (cfg.hugepage_z_ - 1)) == 0);
/* verify arena.hi_ is aligned on a hugepage boundary */
REQUIRE(((size_t)(arena.hi_) & (cfg.hugepage_z_ - 1)) == 0);
byte * lo = arena.lo_;
byte * free = arena.free_;
byte * limit = arena.limit_;
byte * hi = arena.hi_;
size_t committed_z = arena.committed_z_;
DArena arena2 = std::move(arena);
REQUIRE(arena.lo_ == nullptr);
REQUIRE(arena.free_ == nullptr);
REQUIRE(arena.limit_ == nullptr);
REQUIRE(arena.hi_ == nullptr);
REQUIRE(arena.committed_z_ == 0);
REQUIRE(arena.lo_ == nullptr);
REQUIRE(arena2.lo_ == lo);
REQUIRE(arena2.free_ == free);
REQUIRE(arena2.limit_ == limit);
REQUIRE(arena2.hi_ == hi);
REQUIRE(arena2.committed_z_ == committed_z);
}
TEST_CASE("allocator-any-1", "[alloc2][AAllocator]")
{
#ifdef NOPE
ArenaConfig cfg { .name_ = "testarena",
.size_ = 1 };
DArena arena = DArena::map(cfg);
#endif
/* empty allocator */
obj<AAllocator> alloc1;
REQUIRE(!alloc1);
REQUIRE(alloc1.iface() != nullptr);
REQUIRE(alloc1.data() == nullptr);
}
} /*namespace ut*/
} /*namespace xo*/