| //===----------------------------------------------------------------------===// |
| // |
| // 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); |
| } |