New cpp folder structure

Signed-off-by: Alexander Borsuk <me@alex.bio>

libs/base/base_tests/thread_safe_queue_tests.cpp

@@ -0,0 +1,100 @@
+#include "testing/testing.hpp"
+
+#include "base/thread_pool_delayed.hpp"
+#include "base/thread_safe_queue.hpp"
+
+#include <optional>
+#include <thread>
+
+
+UNIT_TEST(ThreadSafeQueue_ThreadSafeQueue)
+{
+  threads::ThreadSafeQueue<size_t> queue;
+
+  TEST(queue.Empty(), ());
+  TEST_EQUAL(queue.Size(), 0, ());
+}
+
+UNIT_TEST(ThreadSafeQueue_Push)
+{
+  size_t const kSize = 100;
+  threads::ThreadSafeQueue<size_t> queue;
+  base::DelayedThreadPool pool(2, base::DelayedThreadPool::Exit::ExecPending);
+  for (size_t i = 0; i < kSize; ++i)
+  {
+    pool.Push([&, i](){
+      queue.Push(i);
+    });
+  }
+
+  pool.ShutdownAndJoin();
+
+  TEST_EQUAL(queue.Size(), kSize, ());
+}
+
+UNIT_TEST(ThreadSafeQueue_WaitAndPop)
+{
+  using namespace std::chrono_literals;
+  threads::ThreadSafeQueue<size_t> queue;
+  size_t const value = 101;
+  size_t result;
+  auto thread = std::thread([&]() {
+    std::this_thread::sleep_for(10ms);
+    queue.Push(value);
+  });
+
+  queue.WaitAndPop(result);
+
+  TEST_EQUAL(result, value, ());
+
+  thread.join();
+}
+
+UNIT_TEST(ThreadSafeQueue_TryPop)
+{
+  using namespace std::chrono_literals;
+  threads::ThreadSafeQueue<size_t> queue;
+  size_t const value = 101;
+  size_t result;
+  auto thread = std::thread([&]() {
+    std::this_thread::sleep_for(10ms);
+    queue.Push(value);
+  });
+
+  TEST(!queue.TryPop(result), ());
+  thread.join();
+
+  TEST(queue.TryPop(result), ());
+  TEST_EQUAL(result, value, ());
+}
+
+UNIT_TEST(ThreadSafeQueue_ExampleWithDataWrapper)
+{
+  size_t const kSize = 100000;
+  threads::ThreadSafeQueue<std::optional<size_t>> queue;
+
+  auto thread = std::thread([&]() {
+    while (true)
+    {
+      std::optional<size_t> dw;
+      queue.WaitAndPop(dw);
+      if (!dw.has_value())
+        return;
+
+      ASSERT_LESS_OR_EQUAL(*dw, kSize, ());
+    }
+  });
+
+  base::DelayedThreadPool pool(4, base::DelayedThreadPool::Exit::ExecPending);
+  for (size_t i = 0; i < kSize; ++i)
+  {
+    pool.Push([&, i](){
+      queue.Push(i);
+    });
+  }
+  pool.Push([&](){
+    queue.Push({});
+  });
+
+  thread.join();
+}