From c00ee82f00f3daf4f71335ad0e44064cc6111ff6 Mon Sep 17 00:00:00 2001
From: Alexander Zhirov <alexander@zhirov.website>
Date: Tue, 12 Oct 2021 19:33:00 +0300
Subject: [PATCH] exercise 3

---
 lesson_6/exercise_3.hpp | 59 +++++++++++++++++++++++++++++++++++++++++
 lesson_6/main.cpp       |  4 ++-
 2 files changed, 62 insertions(+), 1 deletion(-)
 create mode 100644 lesson_6/exercise_3.hpp

diff --git a/lesson_6/exercise_3.hpp b/lesson_6/exercise_3.hpp
new file mode 100644
index 0000000..87a69b0
--- /dev/null
+++ b/lesson_6/exercise_3.hpp
@@ -0,0 +1,59 @@
+/*
+ * exercise_3.hpp
+ *
+ *  Created on: 12 окт. 2021 г.
+ *      Author: alexander
+ */
+
+#pragma once
+
+#include <iostream>
+#include <vector>
+#include <thread>
+#include <mutex>
+#include <algorithm>
+#include <random>
+
+std::mutex m;
+
+void generate_things(std::vector<int> &v)
+{
+    std::random_device rd;
+    std::mt19937 mersenne(rd());
+    std::uniform_int_distribution<int> urd(0, 1000);
+
+    std::lock_guard lg(m);
+
+    std::generate(v.begin(), v.end(), [&]()
+    {
+        return urd(mersenne);
+    });
+}
+
+void pop_thing(std::vector<int> &v)
+{
+    std::lock_guard lg(m);
+
+    std::cout << *std::max_element(v.begin(), v.end()) << std::endl;
+}
+
+void exercise_3()
+{
+    std::vector<int> v(100);
+    size_t count = 100;
+
+    while (count--)
+    {
+        std::thread owner([&]()
+        {
+            generate_things(v);
+        });
+        std::thread thief([&]()
+        {
+            pop_thing(v);
+        });
+
+        owner.join();
+        thief.join();
+    }
+}
diff --git a/lesson_6/main.cpp b/lesson_6/main.cpp
index 012a7bb..aa910e4 100644
--- a/lesson_6/main.cpp
+++ b/lesson_6/main.cpp
@@ -6,11 +6,13 @@
  */
 #include "exercise_1.hpp"
 #include "exercise_2.hpp"
+#include "exercise_3.hpp"
 
 int main()
 {
 //    exercise_1();
-    exercise_2();
+//    exercise_2();
+    exercise_3();
 
     return 0;
 }