Eric Fiselier | 257fd69 | 2016-05-07 01:04:55 +0000 | [diff] [blame] | 1 | //===----------------------------------------------------------------------===// |
| 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
| 5 | // This file is dual licensed under the MIT and the University of Illinois Open |
| 6 | // Source Licenses. See LICENSE.TXT for details. |
| 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | |
| 10 | // UNSUPPORTED: c++98, c++03 |
| 11 | |
| 12 | // <experimental/memory_resource> |
| 13 | |
| 14 | // memory_resource * null_memory_resource() |
| 15 | |
| 16 | #include <experimental/memory_resource> |
| 17 | #include <new> |
| 18 | #include <type_traits> |
| 19 | #include <cassert> |
| 20 | |
| 21 | #include "test_macros.h" |
| 22 | #include "count_new.hpp" |
| 23 | |
| 24 | namespace ex = std::experimental::pmr; |
| 25 | |
| 26 | struct assert_on_compare : public ex::memory_resource |
| 27 | { |
| 28 | protected: |
| 29 | virtual void * do_allocate(size_t, size_t) |
| 30 | { assert(false); } |
| 31 | |
| 32 | virtual void do_deallocate(void *, size_t, size_t) |
| 33 | { assert(false); } |
| 34 | |
| 35 | virtual bool do_is_equal(ex::memory_resource const &) const noexcept |
| 36 | { assert(false); } |
| 37 | }; |
| 38 | |
| 39 | void test_return() |
| 40 | { |
| 41 | { |
| 42 | static_assert(std::is_same< |
| 43 | decltype(ex::null_memory_resource()), ex::memory_resource* |
| 44 | >::value, ""); |
| 45 | } |
| 46 | // Test that the returned value is not null |
| 47 | { |
| 48 | assert(ex::null_memory_resource()); |
| 49 | } |
| 50 | // Test the same value is returned by repeated calls. |
| 51 | { |
| 52 | assert(ex::null_memory_resource() == ex::null_memory_resource()); |
| 53 | } |
| 54 | } |
| 55 | |
| 56 | void test_equality() |
| 57 | { |
| 58 | // Same object |
| 59 | { |
| 60 | ex::memory_resource & r1 = *ex::null_memory_resource(); |
| 61 | ex::memory_resource & r2 = *ex::null_memory_resource(); |
| 62 | // check both calls returned the same object |
| 63 | assert(&r1 == &r2); |
| 64 | // check for proper equality semantics |
| 65 | assert(r1 == r2); |
| 66 | assert(r2 == r1); |
| 67 | assert(!(r1 != r2)); |
| 68 | assert(!(r2 != r1)); |
| 69 | // check the is_equal method |
| 70 | assert(r1.is_equal(r2)); |
| 71 | assert(r2.is_equal(r1)); |
| 72 | } |
| 73 | // Different types |
| 74 | { |
| 75 | ex::memory_resource & r1 = *ex::null_memory_resource(); |
| 76 | assert_on_compare c; |
| 77 | ex::memory_resource & r2 = c; |
| 78 | assert(r1 != r2); |
| 79 | assert(!(r1 == r2)); |
| 80 | assert(!r1.is_equal(r2)); |
| 81 | } |
| 82 | } |
| 83 | |
| 84 | void test_allocate() |
| 85 | { |
| 86 | #ifndef TEST_HAS_NO_EXCEPTIONS |
| 87 | DisableAllocationGuard g; // null_memory_resource shouldn't allocate. |
| 88 | try { |
| 89 | ex::null_memory_resource()->allocate(1); |
| 90 | assert(false); |
| 91 | } catch (std::bad_alloc const &) { |
| 92 | // do nothing |
| 93 | } catch (...) { |
| 94 | assert(false); |
| 95 | } |
| 96 | #endif |
| 97 | } |
| 98 | |
| 99 | void test_deallocate() |
| 100 | { |
| 101 | globalMemCounter.reset(); |
| 102 | |
| 103 | int x = 42; |
| 104 | ex::null_memory_resource()->deallocate(nullptr, 0); |
| 105 | ex::null_memory_resource()->deallocate(&x, 0); |
| 106 | |
| 107 | assert(globalMemCounter.checkDeleteCalledEq(0)); |
| 108 | assert(globalMemCounter.checkDeleteArrayCalledEq(0)); |
| 109 | } |
| 110 | |
| 111 | int main() |
| 112 | { |
| 113 | test_return(); |
| 114 | test_equality(); |
| 115 | test_allocate(); |
| 116 | test_deallocate(); |
| 117 | } |