Add unit test for deque

rt/test/unit/deque.cpp

+#include <algorithm>
+#include <atomic>
+#include <cstdint>
+#include <cstdio>
+#include <vector>
+#include <thread>
+
+#include <typon/fundamental/deque.hpp>
+
+using namespace typon;
+
+using u64 = std::uint_fast64_t;
+using uint = unsigned int;
+
+static uint thieves = 1;
+static u64 N = u64(1) << 20;
+static fdt::lock_free::deque<int> deque {thieves + 1};
+static std::atomic<bool> full = false;
+static std::vector<std::vector<int>> results(thieves + 1);
+
+int main()
+{
+  std::vector<std::thread> v;
+  for (uint i = 0; i < thieves; i++)
+  {
+    v.push_back(std::thread([i]() {
+      while (true)
+      {
+        auto p = deque.steal();
+        if (p)
+        {
+          results[i].push_back(*p);
+        }
+        else
+        {
+          if (full.load())
+          {
+            break;
+          }
+        }
+      }
+    }));
+  }
+
+  for (u64 j = 0; j < N; j++)
+  {
+    deque.push(j);
+  }
+
+  full.store(true);
+
+  while (auto p = deque.pop())
+  {
+    results[thieves].push_back(*p);
+  }
+
+  for (auto & t : v)
+  {
+    t.join();
+  }
+
+  std::vector<int> tally;
+  for (auto & result : results)
+  {
+    for (auto j : result)
+    {
+      tally.push_back(j);
+    }
+  }
+
+  if (tally.size() != N)
+  {
+    puts("error: lost reads");
+    return 1;
+  }
+
+  std::sort(tally.begin(), tally.end());
+
+  for (uint i = 0; i < tally.size() - 1; i++)
+  {
+    if (tally[i] != tally[i + 1] - 1)
+    {
+      puts("error: corrupted reads");
+      return 1;
+    }
+  }
+}

rt/test/unit/makefile

+CXX = clang++-14
+CXXFLAGS = -g -O3 -flto -Werror -Wall -Wextra -std=c++20 -stdlib=libc++ -I../../include
+LDLIBS = -pthread