| 1 | //===----------------------------------------------------------------------===// |
|---|---|
| 2 | // |
| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| 4 | // See https://llvm.org/LICENSE.txt for license information. |
| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| 6 | // |
| 7 | //===----------------------------------------------------------------------===// |
| 8 | |
| 9 | // <memory> |
| 10 | |
| 11 | // shared_ptr |
| 12 | |
| 13 | // shared_ptr(const shared_ptr& r); |
| 14 | |
| 15 | #include <memory> |
| 16 | #include <cassert> |
| 17 | |
| 18 | #include "test_macros.h" |
| 19 | |
| 20 | struct A |
| 21 | { |
| 22 | static int count; |
| 23 | |
| 24 | A() {++count;} |
| 25 | A(const A&) {++count;} |
| 26 | ~A() {--count;} |
| 27 | }; |
| 28 | |
| 29 | int A::count = 0; |
| 30 | |
| 31 | int main(int, char**) |
| 32 | { |
| 33 | { |
| 34 | std::shared_ptr<A> pA(new A); |
| 35 | assert(pA.use_count() == 1); |
| 36 | assert(A::count == 1); |
| 37 | { |
| 38 | std::shared_ptr<A> pA2(pA); |
| 39 | assert(A::count == 1); |
| 40 | assert(pA.use_count() == 2); |
| 41 | assert(pA2.use_count() == 2); |
| 42 | assert(pA2.get() == pA.get()); |
| 43 | } |
| 44 | assert(pA.use_count() == 1); |
| 45 | assert(A::count == 1); |
| 46 | } |
| 47 | assert(A::count == 0); |
| 48 | { |
| 49 | std::shared_ptr<A> pA; |
| 50 | assert(pA.use_count() == 0); |
| 51 | assert(A::count == 0); |
| 52 | { |
| 53 | std::shared_ptr<A> pA2(pA); |
| 54 | assert(A::count == 0); |
| 55 | assert(pA.use_count() == 0); |
| 56 | assert(pA2.use_count() == 0); |
| 57 | assert(pA2.get() == pA.get()); |
| 58 | } |
| 59 | assert(pA.use_count() == 0); |
| 60 | assert(A::count == 0); |
| 61 | } |
| 62 | assert(A::count == 0); |
| 63 | |
| 64 | { |
| 65 | std::shared_ptr<A const> pA(new A); |
| 66 | std::shared_ptr<A const> pA2(pA); |
| 67 | assert(pA.get() == pA2.get()); |
| 68 | } |
| 69 | |
| 70 | return 0; |
| 71 | } |
| 72 |