From d98ac8bb082ec3282d332d5484c6e38e46b12317 Mon Sep 17 00:00:00 2001
From: Egor Tensin <Egor.Tensin@gmail.com>
Date: Fri, 1 Jan 2021 02:50:52 +0300
Subject: add example foo.cpp

---
 .github/workflows/test.yml | 23 ++++++++++++++++++++++-
 foo.cpp                    | 39 +++++++++++++++++++++++++++++++++++++++
 2 files changed, 61 insertions(+), 1 deletion(-)
 create mode 100644 foo.cpp

diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index e5118cc..bf87d6b 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -43,6 +43,10 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v2
 
+      - name: Clean up PATH
+        uses: egor-tensin/cleanup-path@v1
+        if: runner.os == 'Windows'
+
       - name: Install Cygwin
         uses: egor-tensin/setup-cygwin@master
         with:
@@ -55,4 +59,21 @@ jobs:
           platform: '${{ matrix.platform }}'
           cygwin: '${{ matrix.cygwin }}'
 
-      # I'm not really sure as to how to properly verify that it worked :-(
+      - name: Build foo.exe
+        run: |
+          $flags = @()
+          if ('${{ matrix.platform }}' -eq 'x86') {
+              $flags += '-m32'
+          }
+          $flags += @(
+              '-x', 'c++',
+              '-std=c++14',
+              '-o', 'foo',
+              'foo.cpp',
+              '-lstdc++'
+          )
+          if ('${{ runner.os }}' -eq 'Linux') {
+              $flags += '-lpthread'
+          }
+          & g++ $flags
+          & (Join-Path . foo)
diff --git a/foo.cpp b/foo.cpp
new file mode 100644
index 0000000..a7891bb
--- /dev/null
+++ b/foo.cpp
@@ -0,0 +1,39 @@
+#include <array>
+#include <cstddef>
+#include <exception>
+#include <functional>
+#include <iostream>
+#include <mutex>
+#include <thread>
+
+namespace {
+
+struct Counter {
+    std::mutex mtx;
+    std::size_t impl = 0;
+};
+
+void do_something(Counter& counter) {
+    std::lock_guard<std::mutex> lck{counter.mtx};
+    ++counter.impl;
+    std::cout << "Doing something #" << counter.impl << '\n';
+}
+
+}
+
+int main() {
+    try {
+        Counter counter;
+        std::array<std::thread, 3> workers;
+        for (auto& worker : workers) {
+            worker = std::thread{&do_something, std::ref(counter)};
+        }
+        for (auto& worker : workers) {
+            worker.join();
+        }
+    } catch (const std::exception& e) {
+        std::cerr << e.what() << '\n';
+        return 1;
+    }
+    return 0;
+}
-- 
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