From 61b9a7258a7693d7f3674a5a1daf7b036ff1d382 Mon Sep 17 00:00:00 2001
From: Dimitry Andric <dim@FreeBSD.org>
Date: Sun, 6 Sep 2015 18:46:46 +0000
Subject: Import libc++ 3.7.0 release (r246257).

---
 .../thread.thread.algorithm/swap.pass.cpp          | 58 ++++++++++++++++++++++
 1 file changed, 58 insertions(+)
 create mode 100644 test/std/thread/thread.threads/thread.thread.class/thread.thread.algorithm/swap.pass.cpp

(limited to 'test/std/thread/thread.threads/thread.thread.class/thread.thread.algorithm/swap.pass.cpp')

diff --git a/test/std/thread/thread.threads/thread.thread.class/thread.thread.algorithm/swap.pass.cpp b/test/std/thread/thread.threads/thread.thread.class/thread.thread.algorithm/swap.pass.cpp
new file mode 100644
index 0000000000000..4d3a742dd168d
--- /dev/null
+++ b/test/std/thread/thread.threads/thread.thread.class/thread.thread.algorithm/swap.pass.cpp
@@ -0,0 +1,58 @@
+//===----------------------------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// UNSUPPORTED: libcpp-has-no-threads
+
+// <thread>
+
+// class thread
+
+// void swap(thread& x, thread& y);
+
+#include <thread>
+#include <new>
+#include <cstdlib>
+#include <cassert>
+
+class G
+{
+    int alive_;
+public:
+    static int n_alive;
+    static bool op_run;
+
+    G() : alive_(1) {++n_alive;}
+    G(const G& g) : alive_(g.alive_) {++n_alive;}
+    ~G() {alive_ = 0; --n_alive;}
+
+    void operator()()
+    {
+        assert(alive_ == 1);
+        assert(n_alive >= 1);
+        op_run = true;
+    }
+};
+
+int G::n_alive = 0;
+bool G::op_run = false;
+
+int main()
+{
+    {
+        G g;
+        std::thread t0(g);
+        std::thread::id id0 = t0.get_id();
+        std::thread t1;
+        std::thread::id id1 = t1.get_id();
+        swap(t0, t1);
+        assert(t0.get_id() == id1);
+        assert(t1.get_id() == id0);
+        t1.join();
+    }
+}
-- 
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