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 // <memory>
11 
12 // template<class D, class A> shared_ptr(nullptr_t, D d, A a);
13 
14 #include <memory>
15 #include <cassert>
16 #include "../test_deleter.h"
17 #include "test_allocator.h"
18 #include "min_allocator.h"
19 
20 struct A
21 {
22     static int count;
23 
AA24     A() {++count;}
AA25     A(const A&) {++count;}
~AA26     ~A() {--count;}
27 };
28 
29 int A::count = 0;
30 
main()31 int main()
32 {
33     {
34     std::shared_ptr<A> p(nullptr, test_deleter<A>(3), test_allocator<A>(5));
35     assert(A::count == 0);
36     assert(p.use_count() == 1);
37     assert(p.get() == 0);
38     test_deleter<A>* d = std::get_deleter<test_deleter<A> >(p);
39     assert(test_deleter<A>::count == 1);
40     assert(test_deleter<A>::dealloc_count == 0);
41     assert(d);
42     assert(d->state() == 3);
43     assert(test_allocator<A>::count == 1);
44     assert(test_allocator<A>::alloc_count == 1);
45     }
46     assert(A::count == 0);
47     assert(test_deleter<A>::count == 0);
48     assert(test_deleter<A>::dealloc_count == 1);
49     assert(test_allocator<A>::count == 0);
50     assert(test_allocator<A>::alloc_count == 0);
51     test_deleter<A>::dealloc_count = 0;
52     // Test an allocator with a minimal interface
53     {
54     std::shared_ptr<A> p(nullptr, test_deleter<A>(1), bare_allocator<void>());
55     assert(A::count == 0);
56     assert(p.use_count() == 1);
57     assert(p.get() == 0);
58     test_deleter<A>* d = std::get_deleter<test_deleter<A> >(p);
59     assert(test_deleter<A>::count ==1);
60     assert(test_deleter<A>::dealloc_count == 0);
61     assert(d);
62     assert(d->state() == 1);
63     }
64     assert(A::count == 0);
65     assert(test_deleter<A>::count == 0);
66     assert(test_deleter<A>::dealloc_count == 1);
67     test_deleter<A>::dealloc_count = 0;
68 #if __cplusplus >= 201103L
69     // Test an allocator that returns class-type pointers
70     {
71     std::shared_ptr<A> p(nullptr, test_deleter<A>(1), min_allocator<void>());
72     assert(A::count == 0);
73     assert(p.use_count() == 1);
74     assert(p.get() == 0);
75     test_deleter<A>* d = std::get_deleter<test_deleter<A> >(p);
76     assert(test_deleter<A>::count ==1);
77     assert(test_deleter<A>::dealloc_count == 0);
78     assert(d);
79     assert(d->state() == 1);
80     }
81     assert(A::count == 0);
82     assert(test_deleter<A>::count == 0);
83     assert(test_deleter<A>::dealloc_count == 1);
84 #endif
85 }
86