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xo-alloc2: allocation unit tests

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This commit is contained in:
Roland Conybeare 2025-12-12 14:04:20 -05:00
commit c63ec1f4d1
4 changed files with 82 additions and 12 deletions
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76
utest/arena.test.cpp
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@ -18,8 +18,11 @@ namespace xo {
using xo::mm::AAllocator;
using xo::mm::IAllocator_DArena;
using xo::mm::IAllocator_Xfer;
using xo::mm::AllocatorError;
using xo::mm::DArena;
using xo::mm::ArenaConfig;
using xo::mm::padding;
using xo::mm::error;
using xo::facet::obj;
using xo::scope;
using std::byte;
@ -130,11 +133,76 @@ namespace xo {
REQUIRE(a1o.available() == a1o.committed());
REQUIRE(a1o.allocated() == 0);
#ifdef NOPE
byte * m = a1o.alloc(1);
}
REQUIRE(m);
#endif
TEST_CASE("allocator-alloc-1", "[alloc2][AAllocator]")
{
/* typed allocator a1o */
ArenaConfig cfg { .name_ = "testarena",
.size_ = 64*1024,
.debug_flag_ = false };
DArena arena = DArena::map(cfg);
obj<AAllocator, DArena> a1o{&arena};
REQUIRE(a1o.reserved() >= cfg.size_);
REQUIRE(a1o.committed() == 0);
REQUIRE(a1o.available() == 0);
REQUIRE(a1o.allocated() == 0);
size_t z0 = 1;
byte * m0 = a1o.alloc(1);
REQUIRE(m0);
REQUIRE(a1o.last_error().error_ == error::none);
REQUIRE(a1o.last_error().error_seq_ == 0);
REQUIRE(a1o.allocated() >= z0);
REQUIRE(a1o.allocated() < z0 + padding::c_alloc_alignment );
REQUIRE(a1o.allocated() <= a1o.committed());
REQUIRE(a1o.allocated() + a1o.available() == a1o.committed());
REQUIRE(a1o.committed() <= a1o.reserved());
size_t z1 = 16;
byte * m1 = a1o.alloc(z1);
REQUIRE(m1);
REQUIRE(a1o.last_error().error_ == error::none);
REQUIRE(a1o.last_error().error_seq_ == 0);
REQUIRE(a1o.allocated() >= z0 + z1);
REQUIRE(a1o.allocated() < z0 + z1 + 2 * padding::c_alloc_alignment );
REQUIRE(a1o.allocated() <= a1o.committed());
REQUIRE(a1o.allocated() + a1o.available() == a1o.committed());
REQUIRE(a1o.committed() <= a1o.reserved());
}
TEST_CASE("allocator-fail-1", "[alloc2][AAllocator]")
{
/* typed allocator a1o */
ArenaConfig cfg { .name_ = "testarena",
.size_ = 64*1024,
.debug_flag_ = false };
DArena arena = DArena::map(cfg);
obj<AAllocator, DArena> a1o{&arena};
REQUIRE(cfg.size_ <= cfg.hugepage_z_);
REQUIRE(a1o.reserved() >= cfg.size_);
REQUIRE(a1o.committed() == 0);
REQUIRE(a1o.available() == 0);
REQUIRE(a1o.allocated() == 0);
size_t z0 = cfg.hugepage_z_ + 1;
byte * m0 = a1o.alloc(z0);
REQUIRE(!m0);
AllocatorError err = a1o.last_error();
REQUIRE(err.error_ == error::reserve_exhausted);
REQUIRE(err.error_seq_ == 1);
REQUIRE(err.request_z_ >= z0);
REQUIRE(err.request_z_ < z0 + padding::c_alloc_alignment);
REQUIRE(err.committed_z_ == 0);
REQUIRE(err.reserved_z_ == cfg.hugepage_z_);
}
} /*namespace ut*/
} /*namespace xo*/