| //===----------------------------------------------------------------------===// |
| // |
| // 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: c++98, c++03, c++11, c++14 |
| |
| // <memory> |
| |
| // template <class _Tp> |
| // void destroy_at(_Tp*); |
| |
| #include <memory> |
| #include <cstdlib> |
| #include <cassert> |
| |
| struct Counted { |
| static int count; |
| static void reset() { count = 0; } |
| Counted() { ++count; } |
| Counted(Counted const&) { ++count; } |
| ~Counted() { --count; } |
| friend void operator&(Counted) = delete; |
| }; |
| int Counted::count = 0; |
| |
| struct VCounted { |
| static int count; |
| static void reset() { count = 0; } |
| VCounted() { ++count; } |
| VCounted(VCounted const&) { ++count; } |
| virtual ~VCounted() { --count; } |
| friend void operator&(VCounted) = delete; |
| }; |
| int VCounted::count = 0; |
| |
| struct DCounted : VCounted { |
| friend void operator&(DCounted) = delete; |
| }; |
| |
| int main() |
| { |
| { |
| void* mem1 = std::malloc(sizeof(Counted)); |
| void* mem2 = std::malloc(sizeof(Counted)); |
| assert(mem1 && mem2); |
| assert(Counted::count == 0); |
| Counted* ptr1 = ::new(mem1) Counted(); |
| Counted* ptr2 = ::new(mem2) Counted(); |
| assert(Counted::count == 2); |
| std::destroy_at(ptr1); |
| assert(Counted::count == 1); |
| std::destroy_at(ptr2); |
| assert(Counted::count == 0); |
| std::free(mem1); |
| std::free(mem2); |
| } |
| { |
| void* mem1 = std::malloc(sizeof(DCounted)); |
| void* mem2 = std::malloc(sizeof(DCounted)); |
| assert(mem1 && mem2); |
| assert(DCounted::count == 0); |
| DCounted* ptr1 = ::new(mem1) DCounted(); |
| DCounted* ptr2 = ::new(mem2) DCounted(); |
| assert(DCounted::count == 2); |
| assert(VCounted::count == 2); |
| std::destroy_at(ptr1); |
| assert(VCounted::count == 1); |
| std::destroy_at(ptr2); |
| assert(VCounted::count == 0); |
| std::free(mem1); |
| std::free(mem2); |
| } |
| } |