301 lines
8.1 KiB
C++
301 lines
8.1 KiB
C++
/* @file intrusive_ptr.test.cpp */
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#include "Refcounted.hpp"
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#include "xo/indentlog/scope.hpp"
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#include "catch2/catch.hpp"
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#include <string_view>
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#include <type_traits>
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namespace xo {
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using xo::ref::Refcount;
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using xo::ref::Borrow;
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using xo::ref::rp;
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using xo::ref::brw;
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using xo::ref::intrusive_ptr_refcount;
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using xo::ref::intrusive_ptr_add_ref;
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using xo::ref::intrusive_ptr_release;
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namespace ut {
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namespace {
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static uint32_t ctor_count = 0;
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static uint32_t dtor_count = 0;
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/* empty object, except for refcount */
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class JustRefcount : public ref::Refcount {
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public:
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JustRefcount() { ++ctor_count; }
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~JustRefcount() { ++dtor_count; }
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}; /*JustRefcount*/
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inline std::ostream & operator<<(std::ostream & os, JustRefcount & x) {
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os << "JustRefcount";
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return os;
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} /*operator<<*/
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} /*namespace*/
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TEST_CASE("refcount", "[refcnt][trivial]") {
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REQUIRE(std::is_default_constructible<ref::Refcount>() == true);
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REQUIRE(std::has_virtual_destructor<ref::Refcount>() == true);
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/* refcount object self-initializes to 0 */
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Refcount x;
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REQUIRE(x.reference_counter() == 0);
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} /*TEST_CASE(refcount)*/
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TEST_CASE("null-intrusive-ptr", "[refcnt][trivial]") {
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//constexpr std::string_view c_self = "TEST_CASE:null-intrusive-ptr";
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REQUIRE(std::has_virtual_destructor<JustRefcount>() == true);
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rp<JustRefcount> p1;
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rp<JustRefcount> p2;
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REQUIRE(sizeof(p1) == sizeof(JustRefcount*));
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REQUIRE(p1.get() == nullptr);
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REQUIRE(p1.operator->() == nullptr);
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REQUIRE(p2.get() == nullptr);
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REQUIRE(p2.operator->() == nullptr);
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/* can assign a nullptr */
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rp<JustRefcount> p3;
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REQUIRE(p3.get() == nullptr);
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p3 = p1;
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REQUIRE(p3.get() == nullptr);
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/* can use aux functions on null pointers */
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REQUIRE(intrusive_ptr_refcount(p1.get()) == 0);
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intrusive_ptr_add_ref(nullptr);
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intrusive_ptr_release(nullptr);
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/* can borrow a null intrusive_ptr */
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brw<JustRefcount> p1_brw = p1.borrow();
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brw<JustRefcount> p2_brw = p2.borrow();
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REQUIRE(p1_brw.get() == nullptr);
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REQUIRE(p1_brw.operator->() == nullptr);
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/* null borrow is false-y */
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REQUIRE(p1_brw == false);
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/* can promote a borrowed pointer */
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rp<JustRefcount> pp = p1_brw.promote();
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REQUIRE(p1.get() == pp.get());
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/* comparisons */
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REQUIRE(Borrow<JustRefcount>::compare(p1_brw, p2_brw) == 0);
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REQUIRE(p1_brw == p2_brw);
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REQUIRE((p1_brw != p2_brw) == false);
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REQUIRE(p1 == p1_brw);
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REQUIRE((p1 != p1_brw) == false);
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REQUIRE(p1_brw == p1);
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REQUIRE((p1_brw != p1) == false);
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} /*TEST_CASE(null-intrusive_ptr)*/
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TEST_CASE("intrusive-ptr-identity", "[refcnt][identity]")
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{
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uint32_t cc = ctor_count;
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uint32_t dc = dtor_count;
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rp<JustRefcount> p1(new JustRefcount());
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REQUIRE(ctor_count == cc + 1);
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REQUIRE(dtor_count == dc);
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REQUIRE(p1.get() != nullptr);
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REQUIRE(p1.get() == p1.operator->());
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REQUIRE(intrusive_ptr_refcount(p1.get()) == 1);
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REQUIRE(p1->reference_counter() == 1);
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intrusive_ptr_add_ref(p1.get());
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REQUIRE(intrusive_ptr_refcount(p1.get()) == 2);
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intrusive_ptr_release(p1.get());
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REQUIRE(intrusive_ptr_refcount(p1.get()) == 1);
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REQUIRE(ctor_count == cc + 1);
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REQUIRE(dtor_count == dc);
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rp<JustRefcount> p2(new JustRefcount());
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REQUIRE(ctor_count == cc + 2);
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REQUIRE(dtor_count == dc);
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REQUIRE(p2.get() != nullptr);
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REQUIRE(p2.get() != p1.get());
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REQUIRE(p2.get() == p2.operator->());
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REQUIRE(p2->reference_counter() == 1);
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/* can borrow a non-null intrusive-ptr */
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brw<JustRefcount> p1_brw = p1.borrow();
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REQUIRE(p1_brw.get() == p1.get());
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/* borrowing does not change refcount, borrow not tracked */
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REQUIRE(ctor_count == cc + 2);
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REQUIRE(dtor_count == dc);
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REQUIRE(p1.get()->reference_counter() == 1);
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/* copying borrowed pointer does not touch refcount */
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brw<JustRefcount> p1_brw2 = p1_brw;
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REQUIRE(ctor_count == cc + 2);
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REQUIRE(dtor_count == dc);
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REQUIRE(p1_brw2.get() == p1.get());
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REQUIRE(p1.get()->reference_counter() == 1);
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} /*TEST_CASE(identity-intrusive-ptr)*/
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TEST_CASE("intrusive-ptr-release", "[refcnt][release]")
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{
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uint32_t cc = ctor_count;
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uint32_t dc = dtor_count;
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rp<JustRefcount> p1(new JustRefcount());
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REQUIRE(ctor_count == cc + 1);
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REQUIRE(dtor_count == dc);
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REQUIRE(p1.get() != nullptr);
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REQUIRE(p1->reference_counter() == 1);
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/* reference count going to 0 -> delete object */
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p1 = nullptr;
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REQUIRE(p1.get() == nullptr);
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REQUIRE(ctor_count == cc + 1);
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REQUIRE(dtor_count == dc + 1);
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} /*TEST_CASE(intrusive-ptr-release)*/
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TEST_CASE("intrusive-ptr-copy", "[refcnt][copy]")
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{
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uint32_t cc = ctor_count;
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uint32_t dc = dtor_count;
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rp<JustRefcount> p1(new JustRefcount());
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JustRefcount * p1_native = p1.get();
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REQUIRE(ctor_count == cc + 1);
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REQUIRE(dtor_count == dc);
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REQUIRE(p1.get() != nullptr);
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REQUIRE(p1->reference_counter() == 1);
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/* copy ctor ran to make copy of p1, did not allocate */
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rp<JustRefcount> p2(p1);
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REQUIRE(p1->reference_counter() == 2);
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REQUIRE(ctor_count == cc + 1);
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REQUIRE(dtor_count == dc);
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} /*TEST_CASE(intrusive-ptr-copy)*/
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TEST_CASE("intrusive-ptr-move", "[refcnt][move]")
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{
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uint32_t cc = ctor_count;
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uint32_t dc = dtor_count;
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rp<JustRefcount> p1(new JustRefcount());
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JustRefcount * p1_native = p1.get();
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REQUIRE(ctor_count == cc + 1);
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REQUIRE(dtor_count == dc);
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REQUIRE(p1.get() != nullptr);
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REQUIRE(p1->reference_counter() == 1);
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rp<JustRefcount> p2{std::move(p1)};
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REQUIRE(p2->reference_counter() == 1);
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REQUIRE(ctor_count == cc + 1);
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REQUIRE(dtor_count == dc);
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p2 = nullptr;
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REQUIRE(ctor_count == cc + 1);
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REQUIRE(dtor_count == dc + 1);
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} /*TEST_CASE(intrusive-ptr-move)*/
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TEST_CASE("instrusive-ptr-assign", "[refcnt][assign]")
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{
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uint32_t cc = ctor_count;
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uint32_t dc = dtor_count;
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rp<JustRefcount> p1(new JustRefcount());
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JustRefcount * p1_native = p1.get();
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REQUIRE(ctor_count == cc + 1);
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REQUIRE(dtor_count == dc);
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REQUIRE(p1.get() != nullptr);
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REQUIRE(p1->reference_counter() == 1);
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rp<JustRefcount> p2;
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REQUIRE(p2.get() == nullptr);
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REQUIRE(ctor_count == cc + 1);
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REQUIRE(dtor_count == dc);
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p2 = p1;
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REQUIRE(p2.get() == p1.get());
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REQUIRE(p2->reference_counter() == 2);
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REQUIRE(ctor_count == cc + 1);
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REQUIRE(dtor_count == dc);
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p1 = nullptr;
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REQUIRE(p2->reference_counter() == 1);
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REQUIRE(ctor_count == cc + 1);
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REQUIRE(dtor_count == dc);
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p2 = nullptr;
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REQUIRE(ctor_count == cc + 1);
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REQUIRE(dtor_count == dc + 1);
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} /*TEST_CASE(intrusive-ptr-assign)*/
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TEST_CASE("intrusive-ptr-move-assign", "[refcnt][move-assign]")
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{
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uint32_t cc = ctor_count;
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uint32_t dc = dtor_count;
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rp<JustRefcount> p1(new JustRefcount());
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JustRefcount * p1_native = p1.get();
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REQUIRE(ctor_count == cc + 1);
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REQUIRE(dtor_count == dc);
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REQUIRE(p1.get() != nullptr);
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REQUIRE(p1->reference_counter() == 1);
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rp<JustRefcount> p2;
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REQUIRE(p2.get() == nullptr);
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REQUIRE(ctor_count == cc + 1);
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REQUIRE(dtor_count == dc);
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p2 = std::move(p1);
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REQUIRE(p1.get() == nullptr);
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REQUIRE(p2.get() == p1_native);
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REQUIRE(p2->reference_counter() == 1);
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REQUIRE(ctor_count == cc + 1);
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REQUIRE(dtor_count == dc);
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p1 = nullptr; /*no-op*/
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REQUIRE(p2->reference_counter() == 1);
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REQUIRE(ctor_count == cc + 1);
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REQUIRE(dtor_count == dc);
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p2 = nullptr;
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REQUIRE(ctor_count == cc + 1);
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REQUIRE(dtor_count == dc + 1);
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} /*TEST_CASE(intrusive-ptr-move-assign)*/
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} /*namespace ut*/
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} /*namespace xo*/
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/* end intrusive_ptr.test.cpp */
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