From 3e519524c118651123eecf60c2bbc5d65ad9bac3 Mon Sep 17 00:00:00 2001
From: Howard Hinnant <hhinnant@apple.com>
Date: Tue, 11 May 2010 19:42:16 +0000
Subject: libcxx initial import

llvm-svn: 103490
---
 .../util.smartptr.weak/util.smartptr.weak.obs/lock.pass.cpp              | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 libcxx/test/utilities/memory/util.smartptr/util.smartptr.weak/util.smartptr.weak.obs/lock.pass.cpp

(limited to 'libcxx/test/utilities/memory/util.smartptr/util.smartptr.weak/util.smartptr.weak.obs/lock.pass.cpp')

diff --git a/libcxx/test/utilities/memory/util.smartptr/util.smartptr.weak/util.smartptr.weak.obs/lock.pass.cpp b/libcxx/test/utilities/memory/util.smartptr/util.smartptr.weak/util.smartptr.weak.obs/lock.pass.cpp
new file mode 100644
index 00000000000..fc7e338e6b7
--- /dev/null
+++ b/libcxx/test/utilities/memory/util.smartptr/util.smartptr.weak/util.smartptr.weak.obs/lock.pass.cpp
@@ -0,0 +1 @@
+//===----------------------------------------------------------------------===//
//
// ΚΚΚΚΚΚΚΚΚΚΚΚΚΚΚΚΚΚΚΚThe LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

// <memory>

// weak_ptr

// shared_ptr<T> lock() const;

#include <memory>
#include <cassert>

struct A
{
    static int count;

    A() {++count;}
    A(const A&) {++count;}
    ~A() {--count;}
};

int A::count = 0;

int main()
{
    {
        std::weak_ptr<A> wp;
        std::shared_ptr<A> sp = wp.lock();
        assert(sp.use_count() == 0);
        assert(sp.get() == 0);
        assert(A::count == 0);
    }
    {
        std::shared_ptr<A> sp0(new A);
        std::weak_ptr<A> wp(sp0);
        std::shared_ptr<A> sp = wp.lock();
        assert(sp.use_count() == 2);
        assert(sp.get() == sp0.get());
        assert(A::count == 1);
    }
    assert(A::count == 0);
    {
        std::shared_ptr<A> sp0(new A);
        std::weak_ptr<A> wp(sp0);
        sp0.reset();
        std::shared_ptr<A> sp = wp.lock();
        assert(sp.use_count() == 0);
        assert(sp.get() == 0);
        assert(A::count == 0);
    }
    assert(A::count == 0);
}
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