Howard Hinnant | c52f43e | 2010-08-22 00:59:46 +0000 | [diff] [blame] | 1 | //===----------------------------------------------------------------------===// |
| 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
| 5 | // This file is distributed under the University of Illinois Open Source |
| 6 | // License. See LICENSE.TXT for details. |
| 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | |
| 10 | // <memory> |
| 11 | |
| 12 | // allocator: |
| 13 | // template <class... Args> void construct(pointer p, Args&&... args); |
| 14 | |
| 15 | #include <memory> |
| 16 | #include <new> |
| 17 | #include <cstdlib> |
| 18 | #include <cassert> |
| 19 | |
| 20 | int new_called = 0; |
| 21 | |
| 22 | void* operator new(std::size_t s) throw(std::bad_alloc) |
| 23 | { |
| 24 | ++new_called; |
| 25 | assert(s == 3 * sizeof(int)); |
| 26 | return std::malloc(s); |
| 27 | } |
| 28 | |
| 29 | void operator delete(void* p) throw() |
| 30 | { |
| 31 | --new_called; |
| 32 | std::free(p); |
| 33 | } |
| 34 | |
| 35 | int A_constructed = 0; |
| 36 | |
| 37 | struct A |
| 38 | { |
| 39 | int data; |
| 40 | A() {++A_constructed;} |
| 41 | |
| 42 | A(const A&) {++A_constructed;} |
| 43 | |
| 44 | explicit A(int) {++A_constructed;} |
| 45 | A(int, int*) {++A_constructed;} |
| 46 | |
| 47 | ~A() {--A_constructed;} |
| 48 | }; |
| 49 | |
| 50 | int move_only_constructed = 0; |
| 51 | |
| 52 | class move_only |
| 53 | { |
| 54 | int data; |
Howard Hinnant | 73d21a4 | 2010-09-04 23:28:19 +0000 | [diff] [blame^] | 55 | #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES |
Howard Hinnant | c52f43e | 2010-08-22 00:59:46 +0000 | [diff] [blame] | 56 | move_only(const move_only&); |
| 57 | move_only& operator=(const move_only&); |
Howard Hinnant | 73d21a4 | 2010-09-04 23:28:19 +0000 | [diff] [blame^] | 58 | #else // _LIBCPP_HAS_NO_RVALUE_REFERENCES |
Howard Hinnant | c52f43e | 2010-08-22 00:59:46 +0000 | [diff] [blame] | 59 | move_only(move_only&); |
| 60 | move_only& operator=(move_only&); |
Howard Hinnant | 73d21a4 | 2010-09-04 23:28:19 +0000 | [diff] [blame^] | 61 | #endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES |
Howard Hinnant | c52f43e | 2010-08-22 00:59:46 +0000 | [diff] [blame] | 62 | |
| 63 | public: |
| 64 | |
Howard Hinnant | 73d21a4 | 2010-09-04 23:28:19 +0000 | [diff] [blame^] | 65 | #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES |
Howard Hinnant | c52f43e | 2010-08-22 00:59:46 +0000 | [diff] [blame] | 66 | move_only(move_only&&) {++move_only_constructed;} |
| 67 | move_only& operator=(move_only&&) {} |
Howard Hinnant | 73d21a4 | 2010-09-04 23:28:19 +0000 | [diff] [blame^] | 68 | #else // _LIBCPP_HAS_NO_RVALUE_REFERENCES |
Howard Hinnant | c52f43e | 2010-08-22 00:59:46 +0000 | [diff] [blame] | 69 | operator std::__rv<move_only> () {return std::__rv<move_only>(*this);} |
| 70 | move_only(std::__rv<move_only>) {++move_only_constructed;} |
Howard Hinnant | 73d21a4 | 2010-09-04 23:28:19 +0000 | [diff] [blame^] | 71 | #endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES |
Howard Hinnant | c52f43e | 2010-08-22 00:59:46 +0000 | [diff] [blame] | 72 | |
| 73 | move_only() {++move_only_constructed;} |
| 74 | ~move_only() {--move_only_constructed;} |
| 75 | }; |
| 76 | |
| 77 | int main() |
| 78 | { |
| 79 | { |
| 80 | std::allocator<A> a; |
| 81 | assert(new_called == 0); |
| 82 | assert(A_constructed == 0); |
| 83 | |
| 84 | A* ap = a.allocate(3); |
| 85 | assert(new_called == 1); |
| 86 | assert(A_constructed == 0); |
| 87 | |
| 88 | a.construct(ap); |
| 89 | assert(new_called == 1); |
| 90 | assert(A_constructed == 1); |
| 91 | |
| 92 | a.destroy(ap); |
| 93 | assert(new_called == 1); |
| 94 | assert(A_constructed == 0); |
| 95 | |
| 96 | a.construct(ap, A()); |
| 97 | assert(new_called == 1); |
| 98 | assert(A_constructed == 1); |
| 99 | |
| 100 | a.destroy(ap); |
| 101 | assert(new_called == 1); |
| 102 | assert(A_constructed == 0); |
| 103 | |
| 104 | a.construct(ap, 5); |
| 105 | assert(new_called == 1); |
| 106 | assert(A_constructed == 1); |
| 107 | |
| 108 | a.destroy(ap); |
| 109 | assert(new_called == 1); |
| 110 | assert(A_constructed == 0); |
| 111 | |
| 112 | a.construct(ap, 5, (int*)0); |
| 113 | assert(new_called == 1); |
| 114 | assert(A_constructed == 1); |
| 115 | |
| 116 | a.destroy(ap); |
| 117 | assert(new_called == 1); |
| 118 | assert(A_constructed == 0); |
| 119 | |
| 120 | a.deallocate(ap, 3); |
| 121 | assert(new_called == 0); |
| 122 | assert(A_constructed == 0); |
| 123 | } |
| 124 | { |
| 125 | std::allocator<move_only> a; |
| 126 | assert(new_called == 0); |
| 127 | assert(move_only_constructed == 0); |
| 128 | |
| 129 | move_only* ap = a.allocate(3); |
| 130 | assert(new_called == 1); |
| 131 | assert(move_only_constructed == 0); |
| 132 | |
| 133 | a.construct(ap); |
| 134 | assert(new_called == 1); |
| 135 | assert(move_only_constructed == 1); |
| 136 | |
| 137 | a.destroy(ap); |
| 138 | assert(new_called == 1); |
| 139 | assert(move_only_constructed == 0); |
| 140 | |
| 141 | a.construct(ap, move_only()); |
| 142 | assert(new_called == 1); |
| 143 | assert(move_only_constructed == 1); |
| 144 | |
| 145 | a.destroy(ap); |
| 146 | assert(new_called == 1); |
| 147 | assert(move_only_constructed == 0); |
| 148 | |
| 149 | a.deallocate(ap, 3); |
| 150 | assert(new_called == 0); |
| 151 | assert(move_only_constructed == 0); |
| 152 | } |
| 153 | } |