b64f8b07c1
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@119395 91177308-0d34-0410-b5e6-96231b3b80d8
63 lines
1.4 KiB
C++
63 lines
1.4 KiB
C++
//===----------------------------------------------------------------------===//
|
|
//
|
|
// 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.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
// <memory>
|
|
|
|
// shared_ptr
|
|
|
|
// shared_ptr(const shared_ptr& r);
|
|
|
|
#include <memory>
|
|
#include <cassert>
|
|
|
|
struct A
|
|
{
|
|
static int count;
|
|
|
|
A() {++count;}
|
|
A(const A&) {++count;}
|
|
~A() {--count;}
|
|
};
|
|
|
|
int A::count = 0;
|
|
|
|
int main()
|
|
{
|
|
{
|
|
std::shared_ptr<A> pA(new A);
|
|
assert(pA.use_count() == 1);
|
|
assert(A::count == 1);
|
|
{
|
|
std::shared_ptr<A> pA2(pA);
|
|
assert(A::count == 1);
|
|
assert(pA.use_count() == 2);
|
|
assert(pA2.use_count() == 2);
|
|
assert(pA2.get() == pA.get());
|
|
}
|
|
assert(pA.use_count() == 1);
|
|
assert(A::count == 1);
|
|
}
|
|
assert(A::count == 0);
|
|
{
|
|
std::shared_ptr<A> pA;
|
|
assert(pA.use_count() == 0);
|
|
assert(A::count == 0);
|
|
{
|
|
std::shared_ptr<A> pA2(pA);
|
|
assert(A::count == 0);
|
|
assert(pA.use_count() == 0);
|
|
assert(pA2.use_count() == 0);
|
|
assert(pA2.get() == pA.get());
|
|
}
|
|
assert(pA.use_count() == 0);
|
|
assert(A::count == 0);
|
|
}
|
|
assert(A::count == 0);
|
|
}
|