xnu-7195.50.7.100.1.tar.gz

[apple/xnu.git] / tests / intrusive_shared_ptr_src / swap.cpp

diff --git a/tests/intrusive_shared_ptr_src/swap.cpp b/tests/intrusive_shared_ptr_src/swap.cpp
new file mode 100644 (file)
index 0000000..746e146
--- /dev/null
+++ b/tests/intrusive_shared_ptr_src/swap.cpp
@@ -0,0 +1,96 @@
+//
+// Tests for
+//  void swap(intrusive_shared_ptr& a, intrusive_shared_ptr& b);
+//
+
+#include <libkern/c++/intrusive_shared_ptr.h>
+#include <darwintest.h>
+#include "test_policy.h"
+
+struct T { int i; };
+
+template <typename T>
+static void
+tests()
+{
+       T obj1{1};
+       T obj2{2};
+
+       // Swap non-null with non-null
+       {
+               tracked_shared_ptr<T> a(&obj1, libkern::retain);
+               tracked_shared_ptr<T> b(&obj2, libkern::retain);
+               T* a_raw = a.get();
+               T* b_raw = b.get();
+               tracking_policy::reset();
+
+               swap(a, b); // ADL call
+
+               CHECK(tracking_policy::retains == 0);
+               CHECK(tracking_policy::releases == 0);
+               CHECK(a.get() == b_raw);
+               CHECK(b.get() == a_raw);
+       }
+
+       // Swap non-null with null
+       {
+               tracked_shared_ptr<T> a(&obj1, libkern::retain);
+               tracked_shared_ptr<T> b = nullptr;
+               T* a_raw = a.get();
+               tracking_policy::reset();
+
+               swap(a, b); // ADL call
+
+               CHECK(tracking_policy::retains == 0);
+               CHECK(tracking_policy::releases == 0);
+               CHECK(a.get() == nullptr);
+               CHECK(b.get() == a_raw);
+       }
+
+       // Swap null with non-null
+       {
+               tracked_shared_ptr<T> a = nullptr;
+               tracked_shared_ptr<T> b(&obj2, libkern::retain);
+               T* b_raw = b.get();
+               tracking_policy::reset();
+
+               swap(a, b); // ADL call
+
+               CHECK(tracking_policy::retains == 0);
+               CHECK(tracking_policy::releases == 0);
+               CHECK(a.get() == b_raw);
+               CHECK(b.get() == nullptr);
+       }
+
+       // Swap null with null
+       {
+               tracked_shared_ptr<T> a = nullptr;
+               tracked_shared_ptr<T> b = nullptr;
+               tracking_policy::reset();
+
+               swap(a, b); // ADL call
+
+               CHECK(tracking_policy::retains == 0);
+               CHECK(tracking_policy::releases == 0);
+               CHECK(a.get() == nullptr);
+               CHECK(b.get() == nullptr);
+       }
+
+       // Swap with self
+       {
+               tracked_shared_ptr<T> a(&obj1, libkern::retain);
+               T* a_raw = a.get();
+               tracking_policy::reset();
+
+               swap(a, a); // ADL call
+
+               CHECK(tracking_policy::retains == 0);
+               CHECK(tracking_policy::releases == 0);
+               CHECK(a.get() == a_raw);
+       }
+}
+
+T_DECL(swap, "intrusive_shared_ptr.swap") {
+       tests<T>();
+       tests<T const>();
+}